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Journal articles on the topic 'Biosorption of lead'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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Morosanu, Irina, Lavinia Tofan, Carmen Teodosiu, and Carmen Paduraru. "Equilibrium studies of the sequential removal of Reactive Blue 19 dye and lead (II) on rapeseed waste." Revista de Chimie 71, no. 7 (2020): 162–74. http://dx.doi.org/10.37358/rc.20.7.8234.

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This study investigates the effect of pollutant initial concentration on the sequential biosorptive removal of Reactive blue 19 dye and Pb(II) ions on rapeseed waste. The initial concentrations of both organic and inorganic pollutants positively influence the sequential biosorption of the dye and metal ion under study on rapeseed meal waste. The most significant increase was found in the removal of Reactive blue 19 dye by using rapeseed previously loaded with lead ions. In this case, the increase of the initial concentration from 15 mg/L to 100 mg/L results in an increase of the biosorption capacity of almost 6.8 times. Taking into account the frequent quantification of the wastewater treatment efficiency through the biosorption capacity generated from equilibrium studies, the obtained experimental data have been modelled by using five two-parameters (Langmuir, Freundlich, Halsey, Temkin and Harkins-Jura) and five three-parameters (Sips, Redlich-Peterson, Toth, modified BET and Hill) nonlinear isotherms. Linearized forms of Langmuir and Freundlich were also discussed. The optimal description for the sequential biosorption of the reactive dye is provided by the Hill and Langmuir isotherms, whereas the retention of lead on rapeseed waste is provided by the Freundlich isotherm.

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Akpomie, K. G., C. C. Ezeofor, S. I. Eze, C. N. Okey, and P. I. Ebiem-Kenechukwu. "Biosorptive Removal of Lead (II), Cadmium (II) and Arsenic (III) from Aqua Media on Vigna Unguiculata Leaf Powders." Biosciences, Biotechnology Research Asia 15, no. 3 (2018): 567–75. http://dx.doi.org/10.13005/bbra/2663.

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The biosorption of Cd (II), As (III) and Pb (II) ions from solution utilizing Vigna unguiculata leaf powders (VULP) as a low cost biosorbent was studied. The influence of temperature, metal ion concentration, biosorbent dose, contact time and pH on the sequestration process was examined by batch procedure. Increase in the biosorption of the three metal ions with increased pH and biosorbent dosage was obtained in this study.Equilibrium contact time of 20, 40 and 50min was achieved for Cd(II), As (III) and Pb(II) ions and biosorption was in the order As(III)> Cd(II) >Pb(II). Isotherm analysis was performed by the application of Langmuir, Freundlich, Flory-Huggins and Scatchard models. The Langmuir model gave the best fit with maximum monolayer biosorption capacity of 109.1, 105 and 119.3 mg/g for Cd (II), Pb (II) and As (III) respectively. Scatchard model confirmed a homogenous surface of VULP and monolayer biosorption of metal ions. Pseudo second order model showed the best fit compared to pseudo first order, Elovich and Banghams kinetic models according to kinetic analysis. Thermodynamics study revealed a feasibly, spontaneous exothermic biosorption process. The result showed good potentials of VULP as suitable cheap biosorbent for attenuation of Cd (II), Pb(II) and As (III) ions from polluted wastewaters.

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Surisetty, Venkateswara Rao, Janusz Kozinski, and L. Rao Nageswara. "Biosorption of Lead Ions from Aqueous Solution UsingFicus benghalensisL." Journal of Engineering 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/167518.

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Ficus benghalensisL., a plant-based material leaf powder, is used as an adsorbent for the removal of lead ions from aqueous solution using the biosorption technique. The effects of process parameters such as contact time, adsorbent size and dosage, initial lead ion concentration, and pH of the aqueous solution on bio-sorption of lead byFicus benghalensisL. were studied using batch process. The Langmuir isotherm was more suitable for biosorption followed by Freundlich and Temkin isotherms with a maximum adsorption capacity of 28.63 mg/g of lead ion on the biomass ofFicus benghalensisL. leaves.

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Darvishi Cheshmeh Soltani, R., A. Rezaee, Gh Shams Khorramabadi, and K. Yaghmaeian. "Optimization of lead (II) biosorption in an aqueous solution using chemically modified aerobic digested sludge." Water Science and Technology 63, no. 1 (2011): 129–35. http://dx.doi.org/10.2166/wst.2011.022.

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Biosorption of Pb(II) by using digested sludge obtained from a municipal wastewater treatment plant in Tehran was examined. The aims of this investigation were biosorption of Pb(II) ions onto chemically treated digested sludge with hydrogen peroxide (H2O2) solution and determination of kinetic and isotherm of biosorption. Biosorption capacity of two types of sludge (treated and untreated) for biosorption of Pb(II) ions was investigated as function of initial Pb(II) concentration and pH using batch biosorption systems. The equilibrium biosorption capacity increased with increasing of initial metal ion concentrations and pH for both of digested sludge. The pseudo-second order kinetic model was found to be slightly suitable than the pseudo-first order kinetic model to correlate the experimental data for two types of digested sludge (R2&gt;0.9). Regarding the applicability of the isotherm models, the freundlich model was found to be suitable than the other isotherm models. According to obtained qmax from Langmuir isotherm, biosorption of Pb(II) by H2O2 treated digested sludge was found to perform better than untreated digested sludge. The maximum biosorption capacity was given 185.19 and 144.93 mgg−1 for H2O2 treated and untreated digested sludge, respectively. Also, the constant of energy (B) between the Pb(II) ions and the adsorbent surface, calculated using BET isotherm model, obtained 5401 and 3401 for H2O2 treated and untreated digested sludge, respectively. These results indicate the usefulness of H2O2 treated digested sludge as a biosorbent for Pb(II) biosorption.

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Dhevagi, P., S. Priyatharshini, A. Ramya, and M. Sudhakaran. "Biosorption of lead ions by exopolysaccharide producing Azotobacter sp." Journal of Environmental Biology 42, no. 1 (2021): 40–50. http://dx.doi.org/10.22438/jeb/42/1/mrn-1231.

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Aim: Removal of lead from wastewater using Azotobacter species and optimisation of various parameters to maximise the adsorption of lead by response surface methodology as a tool. Methodology: The bacterial isolate UBI-7 recovered from sewage water irrigated soil was examined for its biosorption potential towards lead. The lead removal efficiency of Azotobacter salinestris was studied with respect to metal concentration (50-250 mg l-1), contact time (24-120 hrs), and pH (4-8).Using response surface methodology, these factors were optimized and R2 value obtained was 0.9710 for lead ions, which indicates the validity of the model. Observation with Fourier Transform Infrared (FTIR), Scanning Electron Microscope imaging (SEM) and Energy Dispersive X-ray Spectroscopic analysis (EDX) were carried out to confirm lead biosorption by Azotobacter salinestris. Results: The lead tolerant bacterium isolated from sewage water irrigated soil (UBI-7) was recognized as Azotobacter salinestris by 16S rRNA based gene sequence analysis. The highest removal percentage of Pb (61.54) was 50 mg l-1 in 72 hrs equilibration period. Interaction effect between different levels of Pb and different contact time of the solution were found to be significant. Lead biosorption by the organism was confirmed by the changes in stretching intensities of functional groups as well as appearance of strong OH stretching at 3291.69 cm-1. Images obtained from Scanning Electron Microscope and Energy Dispersive X-ray Spectroscopic studies of the bacteria (UBI-7) before and after biosorption clearly indicated lead adsorption. Interpretation: Current study proves that the functional groups of Azotobacter salinestris are involved in lead biosorption from aqueous solution which was confirmed through FTIR.EDX analysis also elucidated the lead absorption by the bacterial cells. Hence, this could be effectively utilized for decontamination of lead from the polluted environment. Key words: Azotobacter salinestris, Biosorption, Lead, Response surface methodology

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E, Tseveendorj, Enkhdul T, S. Lin, Dorj D, Oyungerel Sh, and Soyol-Erdene T.O. "Biosorption of lead (II) from an aqueous solution using biosorbents prepared from water plants." Mongolian Journal of Chemistry 18, no. 44 (2018): 52–61. http://dx.doi.org/10.5564/mjc.v18i44.937.

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Due to its toxicity causing serious health problems, persistence in the environment and non-biodegradability, lead (Pb) is considered as one of the most harmful metals on earth. In this study, dried aquatic plants as sorbents including Nymphoides peltata (NP), Typha laxmannii (TL), and Eichhornia crassipes (EC) were examined and compared to discover the best biosorption for Pb. The effect of physical and chemical parameters including pH (2.0–5.5), sorbent dosage (1–5 g/l), metal concentration (20–100 mg/l), and contact time (~240 min) were investigated to determine the optimal condition for Pb(II) biosorption. As a result, the optimum pH, sorbent dosage, and contact time were 5.0, 1 g/l, and 120 minutes, respectively. Pb2+ biosorption data were found to follow the Langmuir isotherm model while the kinetic biosorption data followed pseudo-second-order model. The maximum biosorption capacity from Langmuir model was calculated as 63.3, 82.9, and 51.9 mg/g for EC, NP, and TL, respectively. All the results showed that biosorption efficiencies of Pb(II) by different biosorbents were in following order NP>EC>TL.

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Irawan, Chairul, Iryanti F. Nata, Meilana D.Putra, and Yuli Ristianingsih. "Biosorption of Lead (II)–containing Sasirangan Textile Wastewater using Nanocomposites of Eleocharis dulcis Fibers with Iron (III) Nanoparticles as Adsorbent." MATEC Web of Conferences 156 (2018): 05011. http://dx.doi.org/10.1051/matecconf/201815605011.

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This research focuses on the study of biocomposite nanoparticles of Eleocharis dulcis (ED) as potentials biosorbent to reduce the concentration of lead (II) ion containing Sasirangan textile industry wastewater. Eleocharis dulcis, locally named as Purun Tikus, has been developing becomes the biocomposites nanomaterial and valuables material in this research. Batch experiments were carried out to considering the kinetic of biosorption of lead onto the adsorbent, evaluating the effects of lead ion equilibrium concentration, equilibrium pH, and temperature on the adsorption of lead (II). Kinetic data of lead (II) biosorption onto EDB and EDB-MH revealed that equilibrium time was reached within 2 h, and the isotherm data showed that the Langmuir maximum adsorption capacity of the EDB-M and EDB-MH at pHe of 6±0.2, room temperature were 150.43 mg/g and 180.92 mg/g, respectively. The thermodynamic of lead (II) biosorption onto the adsorbent implied the biosorption was spontaneous and endothermic indicating by increased in temperature would increased in adsorption capacity.

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Karim Salmani, Bita, Mohammad Ali Amoozegar, Hamid Babavalian, Hamid Tebyanian, and Fatemeh Shakeri. "Removing Lead from Iranian Industrial Wastewater." International Letters of Natural Sciences 57 (August 2016): 79–88. http://dx.doi.org/10.18052/www.scipress.com/ilns.57.79.

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Metals and chemicals have been increased in industrial processes which they contain a high level of toxic heavy metals and cause a lot of disadvantages for the environment and human health .Biosorption of Pb (П) ions has been studied from aqueous solutions in a batch system by using a bacterial strain isolated from petrochemical wastewaters. Strain 8-I was selected to study the impact of different factors on removal rate. According to morphological, physiological and biochemical characterizations of the strain and in comparison with other studies the strain was tentatively identified as Bacillus sp strain8-I. The maximum Lead biosorption capacity of 8-I isolate was determined to be 41.58 % at pH 4.0 with 80 mg/l concentration in 48 hours equilibrium time. The comparison between the biosorption capacity of live (45.50 mg/g), heat inactivated (30.23 mg/g) and NaN3 pretreated biomass (26.86 mg/g) were indicated that the ability of live biomass for both of active and passive uptake of lead.

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Abioye, O. P., H. O. Nnadozie, S. A. Aransiola, and O. I. Musa. "Biosorption of lead by bacteria isolated from abattoir wastewater." Nigerian Journal of Technological Research 16, no. 1 (2021): 43–51. http://dx.doi.org/10.4314/njtr.v16i1.6.

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Six bacteria were isolated from abattoir wastewater collected from Minna central abattoir. Lead tolerant bacteria were isolated from the wastewater. The isolates were then characterized on the basis of their colonial appearance and reaction to various biochemical tests. The lead tolerance profile of the isolates was carried out using agar diffusion method, with concentrations of Lead nitrate ranging from 50-250 mg/L. Two resistant isolates identified as species of Bacillus and Neisseria were selected for biosorption studies. Lead concentration was determined using Atomic Absorption Spectrophotometry. The lead biosorption capacity of the two isolates was studied by inoculating 2 mL of 24 hours old bacteria suspension in 50mL Nutrient broth, containing varying concentrations of lead (500 and 1000 mg/L) at varying pH (7 and 8), with representative samples being withdrawn at day 4, 8 and 12. The results showed that highest biosorption rate was recorded on day 10, at pH 7, in solution containing 500 mg/L of lead with 75.3% and 66% by Bacillus sp. and Neisseria sp. respectively. These results show that Bacillus sp. had better sorption capacity than Neisseria sp. Both organisms can be used for the removal of lead. Keywords: Wastewater, Biosorption, Abattoir, heavy metal, Bacteria

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Syed, Shameer, and Paramageetham Chinthala. "Heavy Metal Detoxification by DifferentBacillusSpecies Isolated from Solar Salterns." Scientifica 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/319760.

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The biosorption mechanism is an alternative for chemical precipitation and ultrafiltration which have been employed to treat heavy metal contamination with a limited success. In the present study, three species ofBacilluswhich were isolated from solar salterns were screened for their detoxification potential of the heavy metals, lead, chromium, and copper, by biosorption. Biosorption potential of each isolate was determined by Atomic Absorption Spectroscopy (AAS), Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES), and Energy Dispersive Spectroscopy (EDS) as the amount of metal present in the medium after the treatment with the isolates. Bacterial isolates,Bacillus licheniformisNSPA5,Bacillus cereusNSPA8, andBacillus subtilisNSPA13, showed significant level of lead biosorption with maximum of 87–90% byBacillus cereusNSPA8. The biosorption of copper and chromium was relatively low in comparison with lead. With the obtained results, we have concluded that the bacterial isolates are potential agents to treat metal contamination in more efficient and ecofriendly manner.

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Chintalapudi, Vinay Kumar, Ramya Krishna S.L. Kanamarlapudi, Useni Reddy Mallu, and Sudhamani Muddada. "Enhanced Biosorption of Pb(II) Ions from Aqueous Solutions onto Citric Acid Treated Aspergillus niger Biomass: Equilibrium and Kinetic Studies." Asian Journal of Chemistry 32, no. 3 (2020): 508–14. http://dx.doi.org/10.14233/ajchem.2020.22346.

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In the present study, initially Aspergillus niger was tested for biosorption of Pb(II) ions and then studied the effect of pretreatment for enhanced biosorption. It was found that the maximum biosorption potential was achieved with citric acid treatment (70.56 %) in comparison with the biomass without treatment (65.46 %) at a biosorbent dose of 20 mg/L, pH 4, 100 rpm, 37 ºC for 8 h. The optimized conditions for treated Aspergillus niger were determined by optimizing the biosorption parameters such as pH, temperature, biomass dose, incubation time and agitation speed. This study indicates that the citric acid treated Aspergillus niger is an effective biosorbent for removal of lead (II) at optimized conditions with the maximum biosorption potential of 83.6 % as compared to previous reported work. SEM-EDX and FTIR analysis showed the structural variations and the functional groups involved in lead biosorption, respectively. Biosorption kinetics showed that pseudo second order kinetic model as the better fit.

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Wierzba, Sławomir. "Biosorption of lead(II), zinc(II) and nickel(II) from industrial wastewater by Stenotrophomonas maltophilia and Bacillus subtilis." Polish Journal of Chemical Technology 17, no. 1 (2015): 79–87. http://dx.doi.org/10.1515/pjct-2015-0012.

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Abstract The biosorption of Pb(II), Zn(II) and Ni(II) from industrial wastewater using Stenotrophomonas maltophilia and Bacillus subtilis was investigated under various experimental conditions regarding pH, metal concentration and contact time. The optimum pH values for the biosorption of the three metals were in the range 5.0-6.0, while the optimal contact time for the two bacterial species was 30 min. Experimental data was analyzed using Langmuir and Freundlich isotherms; the former had a better fit for the biosorption of Pb(II), Zn(II) and Ni(II). The maximum adsorption uptakes (qmax) of the three metals calculated from the Langmuir biosorption equation for S. maltophilia were 133.3, 47.8 and 54.3 for Pb(II), Zn(II) and Ni(II), respectively, and for B. subtilis were 166.7, 49.7 and 57.8 mg/g, respectively. B. subtilis biomass was more favorable for the biosorption of Pb (II) and Ni (II), while S. maltophilia was more useful for the biosorption of Zn (II).

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Wierzba, Sławomir, and Adam Latała. "Biosorption lead(II) and nikel(II) from an aqueous solution by bacterial biomass." Polish Journal of Chemical Technology 12, no. 3 (2010): 72–78. http://dx.doi.org/10.2478/v10026-010-0038-6.

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Biosorption lead(II) and nikel(II) from an aqueous solution by bacterial biomass The optimum conditions for biosorption of Pb(II) and Ni(II) from aqueous solution were investigated, by using living and nonliving Pseudomonas fluorescens and Bacillus pumilus isolated from wastewater treatment plant. It was found that the optimum pH for Pb(II) removal by living and nonliving cells was 6.0, while 7.0 for Ni(II) removal. At the optimal conditions, metal ion biosorption was increased as the initial metal concentration increased. The binding capacity by living cells is significantly higher than that of nonliving cells at tested conditions. The maximum biosorption capacities for lead and nickel by using Ps. fluo-rescens and B. pumilus were 77.6, 91.4 and 65.1, 73.9 mg/g, respectively. The results of bio-sorption time and desorption experiments suggested that Pb(II) and Ni(II) uptake by the living bacterial biomass might be enhanced by intracellular accumulation.

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Friis, N., and P. Myers-Keith. "Biosorption of uranium and lead byStreptomyces longwoodensis." Biotechnology and Bioengineering 28, no. 1 (1986): 21–28. http://dx.doi.org/10.1002/bit.260280105.

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Boeykens, Susana P., Andrea Saralegui, Néstor Caracciolo, and Maria N. Piol. "Agroindustrial Waste for Lead and Chromium Biosorption." Journal of Sustainable Development of Energy, Water and Environment Systems 6, no. 2 (2018): 341–50. http://dx.doi.org/10.13044/j.sdewes.d5.0184.

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Mata, Yasmina N., Elena Torres, M. Luisa Blázquez, Antonio Ballester, F. González, and J. A. Muñoz. "Lead and Gold Removal Using Sugar-Beet Pectin Gels with and without Immobilized Fucus Vesiculosus." Advanced Materials Research 20-21 (July 2007): 599–602. http://dx.doi.org/10.4028/www.scientific.net/amr.20-21.599.

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Sugar-beet pectin gels are a novel material with applications in heavy and precious metal removal and biomass immobilization which are similar to those of alginate. This paper presents the experimental results of the kinetics of Pb(II) and Au(III) batch removal with these gels, with and without immobilized biomass of the brown algae Fucus vesiculosus. The evolution of the metal concentration, solution pH and Ca2+ liberation was determined. The biomass was characterized before and after the metal removal using SEM-EDX, FESEM, FETEM, XRD and FTIR techniques. The Pb(II) removal followed a typical biosorption kinetics with a final equilibrium metal concentration. The immobilized algae had different biosorptive behaviour than both the original sugar-beet pectin gels and the free biomass. There was no Au(III) removal with the pectin gels without algae. In the case of the immobilized biomass, the Au(III) recovery occurred in two stages, where the biosorption was followed by the reduction of the Au(III) to Au(0) due to the presence of the own algae. The Au(0) precipitated preferably on the surface of the algal biomass and in the form of colloidal gold in the solution and entrapped within the pectin gel matrix.

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Yahya, Jaafar Zaki, and Hussain Majeed Flayeh. "Design Experiments for Biosorption of Lead Ions from Wastewater by Box-Wilson’s Method." Association of Arab Universities Journal of Engineering Sciences 26, no. 2 (2019): 45–53. http://dx.doi.org/10.33261/jaaru.2019.26.2.007.

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Box-Wilson’s method of design of experiments was used to maximize heavy metal removal from synthetic wastewater. The process of optimization was based on four independent pertinent parameters: agitation speed (150-250) rpm, initial metal concentration (20-40) mg/l, pH (4-8), and biomass dose (2-4) g/l. Lead was chosen as heavy metal. A maximum biosorption was practically attained following thirty runs of different experiments, as given by 24 - Central Composite Design (CCD). The best conditions were initial metal concentration 25.29 mg/l, pH 5.78, biomass dose 3.36 g/l, agitation speed 209.21 rpm. The gained data of experiments were used to form a semiempirical model, based upon a quadratic polynomial, to foretell lead ions biosorption. The model was examined using a statistical software (Design Expert® 11.0) and found adequate. Biosorption response surfaces and contour plots were generated using the developed model, which exposed the existence of high biosorption plateaus whose specifications will be beneficial in monitoring industrial scale or pilot-scale units of future to confirm economic achievability.

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P.J, Rao,. "PROCESS OPTIMIZATION AND BIOSORPTION OF LEAD USING ALBIZIA SAMAN LEAF POWDER." IOSR Journal of Pharmacy (IOSRPHR) 2, no. 3 (2012): 579–92. http://dx.doi.org/10.9790/3013-0230579592.

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Qiao, Weichuan, Yunhao Zhang, Hao Xia, et al. "Bioimmobilization of lead by Bacillus subtilis X3 biomass isolated from lead mine soil under promotion of multiple adsorption mechanisms." Royal Society Open Science 6, no. 2 (2019): 181701. http://dx.doi.org/10.1098/rsos.181701.

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In this study, a lead-resistant bacterium, Bacillus subtilis X3, was used to prepare a lead bioadsorbent for immobilization and removal of lead in lead solution. The lead shot precipitate was analysed by scanning electron microscopy combined with energy dispersive X-ray fluorescence microscopy, Fourier transform infrared spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The adsorbed lead was mainly mineralized to form Pb 5 (PO 4 ) 3 OH, Pb 10 (PO 4 ) 6 (OH) 2 and Pb 5 (PO 4 ) 3 Cl; however, other mechanisms that can also promote the mineralization of lead should not be ignored. For example, Na + and Ca 2+ on the cell wall surface were exchanged with Pb 2+ in solution, which confirmed that the ion-exchange process occurred before mineralization. Moreover, adsorption bridging caused by extracellular polymeric substances also accelerated the further aggregation of lead, and the biomass was encapsulated by lead gradually. Hydroxyl, carbonyl, carboxyl and amine groups were not observed in lead mineral crystals, but the complexation between lead and these groups still benefited the mineralization of lead. The valence of Pb(II) was not changed after mineralization, which indicated that the biosorption process was not a redox reaction. Finally, biosorption occurred on the outer surface of the cell, but its specific surface area was relatively small, limiting the amount and efficiency of biosorption.

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Dai, Q. H., X. Y. Bian, R. Li, et al. "Biosorption of lead(II) from aqueous solution by lactic acid bacteria." Water Science and Technology 79, no. 4 (2019): 627–34. http://dx.doi.org/10.2166/wst.2019.082.

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Abstract The biosorption of Pb(II) from aqueous solutions by lactic acid bacterium, Lactobacillus brevis, was studied. The effects of initial pH, contact time, initial Pb(II) concentration, bacterial concentration, rotation speed and temperature of biosorption of Pb(II) from aqueous solutions were investigated. The optimal condition for Pb2+ ions adsorption was observed at pH 6, with the rotational speed of 120 rpm.min−1, bacterial concentration of 3 g.L−1, temperature of 40 °C and contact time of 12 h. The correlation regression coefficients showed that the biosorption process can be well fitted with the Redlich-Peterson, Langmuir, Freundlich and Temkin isotherm models. The equilibrium adsorption capacity reached 53.632 mg.g−1. Binding energy value was 0.264 kJ/mol, which indicated that the adsorption process seemed to involve chemisorption and physisorption. Kinetics of adsorption was found to fit well with the pseudo-second-order and Elovich kinetic equations. Thermodynamic parameters revealed the feasibility, spontaneity and endothermic nature of adsorption.

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Ŝpanêlová, M., V. Machoviĉ, and M. Březina. "Characterization and sorption properties of Aspergillus niger waste biomass." Open Chemistry 1, no. 3 (2003): 192–200. http://dx.doi.org/10.2478/bf02476223.

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AbstractThe structure and the biosorption properties of fungal biomass of Aspergillus niger originated from citric acid fermentation industry was investigated. This waste biomass, produced in high quantity in carefully controlled industrial processes, has certain favourable characteristics that may be improved for its usefulness. In environmental chemistry, it is known for the removal of heavy metals cations. In this work, different alkaline treatments (1M NaOH/20°C/24 h and 10M NaOH/107°C/6 h) were used to evaluate the dependence of sorption properties of biomass on the cell wall composition. The biosorption was studied by the batch method, with the biomass concentration of 1 g/l, at pH 6. The adsorption of lead was more effective than that of cadmium. The biosorption capacity was evaluated using the biosorption isotherm derived from the equilibrium data. At pH 6, the maximmum lead biosorption capacity estimated with the Langmuir model was 93 mg/g dry biomass.

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Beolchini, F., C. Pennesi, B. Testaferri, C. Totti, I. De Michelis, and Francesco Vegliò. "Waste Biomass from Marine Environment as Arsenic and Lead Biosorbent." Advanced Materials Research 71-73 (May 2009): 597–600. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.597.

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This paper deals with arsenic and lead biosorption by different waste biomasses coming from the marine environment. Shoreline seaweeds and seagrasses were used to adsorb metals from aqueous solutions, under different pH. Experimental tests were performed in order to study the equilibrium of biosorption with suspended biomass. The obtained results confirmed the possibility of using marine macrophyte biomass for heavy metal biosorption and evidenced a strong dependence of lead and arsenic uptake on the macrophyte structure. Brown algae were found to be the best sorbents for lead with a maximum observed lead uptake of 140 mg/g; green algae showed a maximum lead uptake in the range 50-70 mg/g; red algae were the worst lead sorbent, in the investigated experimental conditions, with a maximum lead uptake in the range 10-40 mg/g. As concerns arsenic, the macrophytes had in general good sorption abilities when compared with those of activated carbon. Furthermore red algae, that for lead were not effective, resulted to be the best sorbents for arsenic. This was explained by a different speciation in aqueous solution of lead (II), that is cationic with respect to arsenic(V), that is anionic.

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Muñoz, Antonio Jesús, Francisco Espínola, Manuel Moya, and Encarnación Ruiz. "Biosorption of Pb(II) Ions byKlebsiellasp. 3S1 Isolated from a Wastewater Treatment Plant: Kinetics and Mechanisms Studies." BioMed Research International 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/719060.

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Lead biosorption byKlebsiellasp. 3S1 isolated from a wastewater treatment plant was investigated through a Rotatable Central Composite Experimental Design. The optimisation study indicated the following optimal values of operating variables: 0.4 g/L of biosorbent dosage, pH 5, and 34°C. According to the results of the kinetic studies, the biosorption process can be described by a two-step process, one rapid, almost instantaneous, and one slower, both contributing significantly to the overall biosorption; the model that best fits the experimental results was pseudo-second order. The equilibrium studies showed a maximum lead uptake value of 140.19 mg/g according to the Langmuir model. The mechanism study revealed that lead ions were bioaccumulated into the cytoplasm and adsorbed on the cell surface. The bacterium Klebsiellasp. 3S1 has a good potential in the bioremoval of lead in an inexpensive and effective process.

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Pradhan, A. A., and A. D. Levine. "Role of Extracellular Components in Microbial Biosorption of Copper and Lead." Water Science and Technology 26, no. 9-11 (1992): 2153–56. http://dx.doi.org/10.2166/wst.1992.0684.

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Binding of metal ions to extracellular components of microbial systems plays an important role in biosorption processes. Besides pH and temperature, type of anionic system and concentration of the metallic ions are some of the governing factors determining the maximum uptake capacity of the microbial system. Actinomycetes show an ability to selectively scavenge metals from aqueous systems. A biosorption system was tested using a bimetallic solution containing lead and copper. Uptake of Pb was observed to increase with concentration. Chloride ions had an inhibiting effect on the metal removal capacity of the actinomycetes system.

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Martins, R. J. E., and R. A. R. Boaventura. "Modelling of lead removal by an aquatic moss." Water Science and Technology 63, no. 1 (2011): 136–42. http://dx.doi.org/10.2166/wst.2011.023.

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Aquatic bryophytes are frequently used as biomonitors for trace metals in aquatic ecosystems. Nevertheless, their special characteristics also allow using them as biosorbents to clean industrial wastewaters. As biosorption is a low cost and effective method for treating metal-bearing wastewaters, understanding the process kinetics is relevant for design purposes. In this study, the ability of the aquatic bryophyte Fontinalis antipyretica to remove lead from simulated wastewaters was evaluated. Three kinetic models (pseudo-first order, pseudo-second order and Elovich) were fitted to the experimental data and compared by the F-test. Previously, the effect on biosorption of parameters such as the initial solution pH, contact time and initial metal ion concentration was investigated. The initial pH of the solution was found to have an optimum value is in the range 4.0–6.0. The equilibrium sorption capacity of lead by Fontinalis antipyretica increased with the initial metal concentration. For an initial metal concentration of 10 mg L−1, the uptake capacity at equilibrium was 4.8 mg g−1. Nevertheless, when the initial concentration increased up to 100 mg L−1, the uptake of lead was 10 times higher. The pseudo-second order biosorption kinetic model provided the better correlation with the experimental data (R2=1.00). The applicability of the Langmuir and Freundlich adsorption isotherms to the present system was also assessed. The maximum lead sorption capacity by Fontinalis antipyretica was 68 mg g−1.

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Zhou, Dao, Lina Zhang, and Shenglian Guo. "Mechanisms of lead biosorption on cellulose/chitin beads." Water Research 39, no. 16 (2005): 3755–62. http://dx.doi.org/10.1016/j.watres.2005.06.033.

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Saueprasea, Panjai, Mutita Nuanjaraen, and Maruemon Chinlapa. "Biosorption of Lead (Pb2+) by Luffa cylindrical Fiber." Environmental Research Journal 4, no. 1 (2010): 157–66. http://dx.doi.org/10.3923/erj.2010.157.166.

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Nessim, Ramzy B., Ahmad R. Bassiouny, Hermine R. Zaki, Madelyn N. Moawad, and Kamal M. Kandeel. "Biosorption of lead and cadmium using marine algae." Chemistry and Ecology 27, no. 6 (2011): 579–94. http://dx.doi.org/10.1080/02757540.2011.607439.

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Yi, Zhengji, Jun Yao, Xing Liu, Jian Liu, and Rongying Zeng. "Investigation of lead(II) biosorption onto Hydrilla verticillata." IOP Conference Series: Earth and Environmental Science 237 (March 19, 2019): 022020. http://dx.doi.org/10.1088/1755-1315/237/2/022020.

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Chathuranga, P. K. Dileepa, D. M. R. E. A. Dissanayake, Namal Priyantha, Sithy S. Iqbal, and M. C. Mohamed Iqbal. "Biosorption and Desorption of Lead(II) byHydrilla verticillata." Bioremediation Journal 18, no. 3 (2014): 192–203. http://dx.doi.org/10.1080/10889868.2014.910492.

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Siegel, S., P. Keller, M. Galun, H. Lehr, B. Siegel, and E. Galun. "Biosorption of lead and chromium by penicillium preparations." Water, Air, & Soil Pollution 27, no. 1-2 (1986): 69–75. http://dx.doi.org/10.1007/bf00464770.

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Golab, Z., B. Orlowska, and R. W. Smith. "Biosorption of lead and uranium by Streptomyces sp." Water, Air, and Soil Pollution 60, no. 1-2 (1991): 99–106. http://dx.doi.org/10.1007/bf00293968.

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Han, Runping, Jinghua Zhang, Weihua Zou, Jie Shi, and Hongmin Liu. "Equilibrium biosorption isotherm for lead ion on chaff." Journal of Hazardous Materials 125, no. 1-3 (2005): 266–71. http://dx.doi.org/10.1016/j.jhazmat.2005.05.031.

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Almaguer-Cantú, Verónica, Lilia H. Morales-Ramos, and Isaías Balderas-Rentería. "Biosorption of lead (II) and cadmium (II) using Escherichia coli genetically engineered with mice metallothionein I." Water Science and Technology 63, no. 8 (2011): 1607–13. http://dx.doi.org/10.2166/wst.2011.225.

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Contamination caused by heavy metals in wastewater has a high potential of risk because they easily penetrate in to the trofic chain accumulating as organometallic compounds. In this work, the expression of mice metallothionein in E. coli (pMt-Thio) was examined as a strategy to enhance metal biosorption efficiency of bacterial biosorbents for Pb(II) and Cd(II) ions. The results showed that pMt-Thio led to significant increase in overall biosorption capacity, especially for biosorption of Pb. Isotherms and kinetic of biosorption were evaluated in this designed system. The influence of metal concentration in solution is discussed in terms of Langmuir and Freundlich isotherm and constants. The Langmuir model was found to correlate better with the experiment data. The biomass showed maximum capacities according to Langmuir adsorption model of 28.14 mgPb/gpMt-Thio and 24.27 mgCd/gpMt-Thio. The study proved that pMt-Thio is a suitable material for the removal of the heavy metal ions studied from aqueous solutions, achieving removal efficiencies higher than 90% for Pb(II) and higher than 40% for Cd(II), and could be considered as a potential material for treating effluent polluted with Cd(II) and Pb(II) ions.

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Keryanti, Keryanti, and Edi Wahyu Sri Mulyono. "Determination of Optimum Condition of Lead (Pb) Biosorption Using Dried Biomass Microalgae Aphanothece sp." Periodica Polytechnica Chemical Engineering 65, no. 1 (2020): 116–23. http://dx.doi.org/10.3311/ppch.15773.

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Contamination of lead (Pb) in water due to domestic and industrial activities can endanger the environment and human health. One of the heavy metal waste treatments is adsorption using microorganisms (biosorption). In this study, dried microalgae Aphanothece sp. used as biosorbent for binding Pb in aqueous solution. Biosorbent was prepared from the 14 days cultivation of microalgae in a photobioreactor system which was then dried and mashed to the size of 45 mesh. Pb metal biosorption experiments were carried out in a batch system at various initial concentration variations (3.9–18.6 mg/L) and contact times (30–180 minutes) to find the optimum conditions of the biosorption process. The concentration of Pb in solution was analysed using the Atomic Absorption Spectroscopy (AAS). The results of the experiment showed that the highest removal efficiency of Pb metal in the initial concentration variation of 18.6 mg/L and contact time of 30 minutes was 99.9 % with an absorption capacity of 185.64 mg/g. Pb metal adsorption data at equilibrium conditions follows the Langmuir isotherm model equation with R2>0.9. Biosorption kinetics using dried biomass of Aphanothece sp. following the pseudo second-order kinetics model. The results of this study provide an overview of the potential microalgae as Pb metal biosorbent in wastewater treatment on a larger scale.

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Oguz, Ensar. "Simultaneous removal of lead, copper, cadmium, nickel, and cobalt heavy metal ions from the quinary system by Abies bornmulleriana cones." Water Science and Technology 82, no. 12 (2020): 3032–46. http://dx.doi.org/10.2166/wst.2020.547.

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Abstract Abies bornmulleriana cone was used to investigate its biosorption efficiency and capacity of Pb2+, Cu2+, Cd2+, Co2+, and Ni2+ heavy metal ions in a quinary system. The mechanism of multi-metal removal was illustrated in terms of FTIR results. Electrophoretic mobilities of the biosorbents were determined to access the information about the competitive biosorption. BET surface area and pore volume of the biosorbents before and after the biosorption were defined to be (5.05 m2 g−1 and 0.0018 cm3 g−1) and (0.97 m2 g−1 and 0.00032 cm3 g−1), respectively. The average pore width of the biosorbent before and after the biosorption was calculated as 9.34 and 13.04 Å, respectively. The pseudo-first-order model and the pseudo-second-order model were applied to analyze the experimental data. Experimental data have been evaluated according to the Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherms. The maximum biosorption efficiency and capacity for Pb2+, Cu2+, Cd2+, Ni2+, and Co2+ ions were defined as (85.4, 56.4, 35.4, 21.7 and 18.9%) and (8.5, 5.6, 3.5, 2.2 and 1.9 mg g−1), respectively. The selectivity of heavy metal ions resulted in the magnitude order of Pb2+ &gt; Cu2+ &gt; Cd2+ &gt; Ni2+ &gt; Co2+.

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SUN, YIH-MIN, CHING-YI HORNG, FU-LIN CHANG, LI-CHUN CHENG, and WEN-XUAN TIAN. "Biosorption of Lead, Mercury, and Cadmium Ions by Aspergillus terreus Immobilized in a Natural Matrix." Polish Journal of Microbiology 59, no. 1 (2010): 37–44. http://dx.doi.org/10.33073/pjm-2010-005.

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Our aim was to investigate the biosorption of Pb2+, Hg2+, Cd2 from aqueous solution by Aspergillus terreus (both free and immobilized on loofa sponge discs). Our results show that the adsorption capacity of fungal biomass on loofa sponge (FBLS) is superior to free fungal biomass (FFB). The adsorption selectivity by FBLS was in the order Pb2+>Hg2+>Cd2+. The maximum metal ions adsorbed was 247.2, 37.7, 23.8 mg/g FBLS for Pb2+, Hg2+ and Cd2+, respectively. Metal uptake by FBLS was affected by the pH of the metal solution, but independent of temperature (10-50 degrees C). The Langmuir model was more suitable than the Freundlich model to describe the biosorption process of FBLS. The regenerated FBLS was found to be effective for repeated use for five cycles without significant loss in adsorption capacity. This research demonstrates that FBLS possesses excellent capacity for Pb2+ biosorption from aqueous solution and industrial wastewaters.

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Perelomov, L. V., O. I. Sizova, and Yu M. Atroshchenko. "Trace elements sorption by bentonite in the presence of bacteria." Геохимия 64, no. 3 (2019): 273–81. http://dx.doi.org/10.31857/s0016-7525643273-281.

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Sorption of lead and copper by calcium bentonite, living and destroyed cells of gram-positive bacteria Bacillus subtilis, as well as in systems including the clay mineral and one of the biotic components in the concentration range of the elements from 25 to 250 μM was studied. The effect of acidity on the biosorption of trace elements was shown. The maximum biosorption of lead and copper was observed at pH 6 and reached 0.72 and 0.52 mM/g of dry matter, respectively. At pH 6 the maximum biosorption by the destroyed cells was also observed — 0.81 mM/g of lead and 0.71 mM/g of copper. Accumulation of trace elements by living and destroyed cells significantly exceeded their sorption by calcium bentonite. In the ternary systems, including bentonite and bacterial cells or bentonite and cell debris, there was an increase in the sorption of lead and copper compared to bentonite alone. At the same time, the sorption of trace elements by a mixture of bentonite and cell fragments was lower than the additively calculated sorption by the individual components for both lead and copper at all concentrations studied. A similar pattern was observed for the system of living cells and bentonite for copper and living cells and bentonite for lead at low metal concentrations.

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Bala, Jeremiah David, Faruk Kuta, Adabara Nasiru, Abdulameen Saheed Adedeji, Adel Ali Saeed Al-Gheethi, and Opeyemi Habeeb Fashola. "Biosorption potential of lead tolerant fungi isolated from refuse dumpsite soil in Nigeria." Acta Scientiarum. Biological Sciences 42 (July 1, 2020): e46753. http://dx.doi.org/10.4025/actascibiolsci.v42i1.46753.

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Metals are non-biodegradable and recurrent in the environs. Heavy metals tolerant fungi were isolated from refuse dumpsite soil using pour plate method. These fungi were identified as Aspergillus niger, Penicillium chrysogenum and Rhizomucor sp. The fungal isolates were screened for cadmium (Cd), lead (Pb) and zinc (Zn) with concentration of 200ppm, 400ppm and 600ppm. Aspergillus niger and Penicillium chrysogenum showed high tolerance for the metals in contrast to the control. The fungi with high tolerance were used for biosorption study. However, Penicillium chrysogenum showed higher lead removal or biosorption potential of 1.07ppm, 3.35ppm and 4.19ppm as compared with Aspergillus niger with lead removal of 0.67ppm, 3.11ppm and 3.79ppm at 5th, 10th and 15th day respectively. One-way Analysis of Variance was used to interpret the data generated from the biosorption study which revealed that there was no significant different (p > 0.05) between the lead removal of Aspergillus niger and Penicillium chrysogenum on the 5th day but there was significant difference (p < 0.05) in the lead removal of Aspergillus niger and Penicillium chrysogenum on the 10th and 15th day. This study suggests the use of these fungal isolates for removal and biotreatment of heavy metal contaminated and polluted environment

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MURTHY, SHRUTI, GEETHA BALI, and SARANGI SK. "LEAD BIOSORPTION BY A BACTERIUM ISOLATED FROM INDUSTRIAL EFFLUENTS." International Journal of Microbiology Research 4, no. 3 (2012): 196–200. http://dx.doi.org/10.9735/0975-5276.4.3.196-200.

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Sulaymon, Abbas H., Shahlaa E. Ebrahim, Sama M. Abdullah, and Tariq J. Al-Musawi. "Removal of lead, cadmium, and mercury ions using biosorption." Desalination and Water Treatment 24, no. 1-3 (2010): 344–52. http://dx.doi.org/10.5004/dwt.2010.1963.

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Prasad, A. "Biosorption of Lead by Pleurotus florida and Trichoderma viride." British Biotechnology Journal 3, no. 1 (2013): 66–78. http://dx.doi.org/10.9734/bbj/2013/2348.

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Gupta, G., and B. Keegan. "Bioaccumulation and biosorption of lead by poultry litter microorganisms." Poultry Science 77, no. 3 (1998): 400–404. http://dx.doi.org/10.1093/ps/77.3.400.

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Yamac, Mustafa, Ayse Betul Karaduman, Zerrin Pat, Maria Julia Amoroso, and Sergio Antonio Cuozzo. "LEAD (II) BIOSORPTION BY A METAL TOLERANT STREPTOMYCES STRAIN." Environmental Engineering and Management Journal 10, no. 11 (2011): 1761–71. http://dx.doi.org/10.30638/eemj.2011.239.

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El Bayoumy, M. A., J. K. Bewtra, H. I. Ali, and N. Biswas. "Biosorption of lead by biomass of sulfate reducing bacteria." Canadian Journal of Civil Engineering 24, no. 5 (1997): 840–43. http://dx.doi.org/10.1139/l97-019.

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Amuda, Omotayo Sarafadeen, Olumuyiwa Idowu Ojo, and Theresa Ibibia Edewor. "Biosorption of Lead from Industrial Wastewater UsingChrysophyllum albidumSeed Shell." Bioremediation Journal 11, no. 4 (2007): 183–94. http://dx.doi.org/10.1080/10889860701710552.

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García-Rosales, G., and A. Colín-Cruz. "Biosorption of lead by maize (Zea mays) stalk sponge." Journal of Environmental Management 91, no. 11 (2010): 2079–86. http://dx.doi.org/10.1016/j.jenvman.2010.06.004.

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Pradhan, Amit A., and Audrey D. Levine. "Microbial biosorption of copper and lead from aqueous systems." Science of The Total Environment 170, no. 3 (1995): 209–20. http://dx.doi.org/10.1016/0048-9697(95)04709-7.

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Javanbakht, Vahid, Hamid Zilouei, and Keikhosro Karimi. "Lead biosorption by different morphologies of fungus Mucor indicus." International Biodeterioration & Biodegradation 65, no. 2 (2011): 294–300. http://dx.doi.org/10.1016/j.ibiod.2010.11.015.

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Córdova, F. J. Cerino, A. M. García León, R. B. Garcia Reyes, et al. "Response surface methodology for lead biosorption on Aspergillus terreus." International Journal of Environmental Science & Technology 8, no. 4 (2011): 695–704. http://dx.doi.org/10.1007/bf03326254.

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