Relevant bibliographies by topics / Heavy metal ion adsorption

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Academic literature on the topic 'Heavy metal ion adsorption'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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Journal articles on the topic "Heavy metal ion adsorption"

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Song, Guanling, Lijing Cao, Xiao Chen, Wenhua Hou, and Qunhui Wang. "Heavy metal adsorption changes of EAF steel slag after phosphorus adsorption." Water Science and Technology 65, no. 9 (May 1, 2012): 1570–76. http://dx.doi.org/10.2166/wst.2012.048.

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A kind of electric arc furnace (EAF) steel slag was phosphated, and its isothermal and dynamic adsorptions of copper, cadmium, and lead ions were measured to determine if heavy metal adsorption changes after phosphorus adsorption. The surface area increased greatly after the slag was phosphated. Isothermal adsorption experiments showed that the theoretical Qmax of the EAF steel slag on Cu2+, Cd2+, and Pb2+ improved 59, 50, and 89% respectively after it was phosphated. Dynamic adsorption results showed that the greatest adsorption capacities of unit volume of Cu2+, Cd2+, and Pb2+ were 2.2, 1.8, and 1.8 times that of the column packed with original EAF steel slag when the column was packed with phosphate EAF steel slag at the same heavy metal ion concentration. The breakthrough time, the exhaustion time and elution efficiency of the column also increased when the column was packed with phosphated EAF steel slag compared with that packed with original EAF steel slag. Phosphorus adsorption could further improve the heavy metal ion adsorption of the EAF steel slag.
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Theodoridou, E., A. D. Jannakoudakis, P. D. Jannakoudakis, and S. Antoniadou. "Electrochemically oxidized carbon fibres as an adsorbent for the attachment of dissolved substances. Adsorption of nitro compounds and ion-exchange of heavy metals." Canadian Journal of Chemistry 69, no. 12 (December 1, 1991): 1881–85. http://dx.doi.org/10.1139/v91-272.

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The adsorption of several aromatic nitro compounds and the ion-exchange of heavy metal ions on electro-oxidized carbon fibres have been investigated using cyclic voltammetric and polarographic techniques. Electro-oxidation is performed by potentiostatic double pulse application. This procedure results in the generation of many functional —OH and —COOH groups with adsorptive and ion-exchanging properties.Multimolecular layers of adsorbed substances may be formed through a procedure of successive adsorption of the nitro-compound and electro-reduction to the corresponding amine, resulting in the attachment of considerable amounts of the nitro-compound to the carbon fibres.The ion-exchange capacity is estimated to be ca. 1 mequiv. g−1 and with slight deviations it follows the rank Ag, Cu, Cd, Pb, Hg. After the electro-reduction of the exchanged metal ions, the ion-exchange process can be repeated several times. This procedure is of importance for the removal of significant amounts of heavy and toxic metals from industrial waste waters. Key words: electro-oxidized carbon fibres, adsorption of aromatic nitro compounds, cation-exchange of heavy metals.
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Djunaidi, Muhammad Cholid, and Khabibi Khabibi. "Potential Adsorption of Heavy Metal Ions by Eugenol Compounds and Derivatives through Ion Imprinted Polymer." Jurnal Kimia Sains dan Aplikasi 22, no. 6 (October 21, 2019): 263–68. http://dx.doi.org/10.14710/jksa.22.6.263-268.

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Research on the potential of Ion Imprinted Polymer (IIP) selective adsorption of heavy metals using eugenol compounds and their derivatives has been carried out. Isolation and synthesis of eugenol derivatives with metal selective active groups and their use as selective metal carriers have been carried out with satisfactory results. Carrier effectiveness can still be improved by methods that focus on the target molecule recognition model. This adsorption method is called Ion Imprinted Polymer (IIP). The main components of IIP are functional monomers, crosslinkers, and target molecules. The use of acrylamide and its derivatives as functional monomers is useful with a lot of success achieved but also invites danger because it includes carcinogenic substances, a nerve poison, and so on. Moreover, the N group, which is an active acrylamide group, and its derivatives are only selective towards borderline metals (HSAB theory). Alternatives that are safe and can increase their selectivity are therefore needed. Eugenol, with its three potential functional groups, is believed to be able to replace the function of acrylamide and its derivatives that can even increase the effectiveness of IIP. The purpose of this study is to determine the potential of eugenol derivatives as selective adsorbents through the IIP method. This synthesis of IIP involved the use of basic ingredients of eugenol and its derivatives (polyeugenol, EOA, polyacetate). Each base material is contacted with a metal template then crosslinked with three kinds of crosslinking agents, namely EGDMA, DVB, and bisphenol. IIP is formed after the metal template is released using acid/HCl. The outcomes obtained demonstrate that the IIP method is able to increase the metal adsorption capacity and that the IIP method for metals is largely determined by the release of metals, which will form a hole for metal entry through adsorption. Poly-Cd-DVB, Eug-Cr-DVB, Poly-Cu-bisphenol, Polyacetate -Cr-DVB are polymer materials that have the potential to make up an IIP.
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Guo, Xue Yi, Sha Liang, and Qing Hua Tian. "Removal of Heavy Metal Ions from Aqueous Solutions by Adsorption Using Modified Orange Peel as Adsorbent." Advanced Materials Research 236-238 (May 2011): 237–40. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.237.

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In this study, orange peel (OP) was modified by KCl to prepare a novel orange peel adsorbent named as KOP. The adsorption behaviors of KOP for five heavy metals (Cu2+, Cd2+, Pb2+, Zn2+, Ni2+) were studied. The effects of pH, adsorption time and metal ion concentration on single heavy metal solution adsorption by KOP were investigated. All adsorption processes can attain equilibrium with 20min and kinetics data of five heavy metal ions were fitted to pseudo-second-equation; the maximum adsorption capacities for Cu2+, Cd2+, Pb2+, Zn2+and Ni2+were calculated as 59.77, 125.63, 141.84, 45.29 and 49.14 mg/g, respectively. Recycle and reuse experiments indicate that KOP could be used for more than 10 cycles. The effect of coexist metal ions on adsorption can be neglected.
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Al-Asheh, Sameer, Fawzi Banat, and Dheaya‘ Al-Rousan. "Adsorption of Copper, Zinc and Nickel Ions from Single and Binary Metal Ion Mixtures on to Chicken Feathers." Adsorption Science & Technology 20, no. 9 (November 2002): 849–64. http://dx.doi.org/10.1260/02636170260555778.

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Certain industries often produce mixtures of heavy metal ions in their waste products. Because of the nature of heavy metal ions and the adsorption process, such metal ions can compete with each other for the sorption sites on an adsorbent during adsorption processes. In the present work, binary systems composed of copper, zinc and nickel ions were selected as examples of heavy metal ion mixtures and tested via batch adsorption processes using chicken feathers as an adsorbent. The uptake of individual metal ions was depressed by the presence of another. Thus, the uptake of copper ions from an initial copper ion solution of 20 ppm concentration was reduced from 0.042 mmol/g to ca. 0.019 mmol/g by the presence of a similar concentration of nickel ions. The Freundlich, Langmuir and Sips multi-component adsorption models were employed to predict the uptake of metal ions from binary metal ion solutions using constants obtained from adsorption isotherm models applied to single-solute systems.
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Arrisujaya, Dian. "EFISIENSI PENYERAPAN KULIT BUAH ATAP (Arenga pinnata) MENGIKAT ION-ION LOGAM KROMIUM DALAM LARUTAN." Jurnal Sains Natural 4, no. 1 (December 1, 2017): 58. http://dx.doi.org/10.31938/jsn.v4i1.76.

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The Adsorption Efficiency of Atap Fruit Shell (Arenga pinnata Merr) on remove Chromium Metal Ions from aSolution Arenga pinnata fruit shell was dried, pulverized, and used for biosorption of Cr(III) and Cr(VI) from a solution. Column experiments were conducted to investigate the affected parameters of pH solution, particle size, chromium metal ion concentration, flow rate and amount of mass biosorbent. The maximum adsorption efficiency of metal ions Cr(III) and Cr(VI), was 47.79% and 41.47% respectively, initial metal ion concentrations of 75-100 mg/L at initial pH of 3 for Cr(VI) and initial pH of 4 for Cr(III) with the particlesize ≤180μm and flow rate of 1-2 mL/min. Adsorption capacity will increase with increasing the number of mass biosorbent, however adsorption efficiency will decrease. An FTIR examination revealed changes between the natural and heavy metals-loaded biomaterial. Scanning electron micrograph (SEM) also revealed changes in the surface morphology of thebiomass as a result of heavy metal adsorption. Based on these results, it could be concluded that the Arenga pinnata was effective in removing heavy metal from aqueous solution and needed consideration for scaled-up apllication.Keywords : Arenga pinnata, heavy metals, biosorption, fourier transform infrared spectroscopy (FTIR), and scanning electron microscope (SEM) ABSTRAK Kemampuan penyerapan kulit buah atap (Areng pinnata) terhadap ion logam Cr(III) dan Cr(VI) dalam larutan. Metoda kolom digunakan dalam proses biosorpsi dengan parameter yang mempengaruhi efisiensi penyerapan yaitu pH larutan, ukuran partikel, konsentrasi ion logam, laju alir dan massabiosorben. Efisiensipenyerapan maksimum ion logam Cr(III) dan Cr(VI) oleh kulit buah atap masing-masing adalah 47.79% dan 41.47 % dengan konsentrasi ion logam 75-100 mg/L pada pH 3 untuk Cr(VI) dan pH 4 untuk Cr(III), ukuran partikel biosorben ≤180µm serta pada laju alir 1-2 mL/menit.Efisiensi penyerapan akan meningkat dengan penambahan massa biosorben, namunkapasitas penyerapannya akan menurun. Analisis FTIR (Fourier Transform Infra Red)digunakan untuk mengetahui membandingkan biomaterial sebelum dan sesudah berikatan dengan ion-ion logam berat.perubahan gugus fungsi pada kulit buah atap dianalisis dengan FTIR (Fourier Transform Infra Red). Sedangkan untuk melihat perubahan permukaan pada kulit buah atap digunakan SEM (Scanning Electron Microscope).Berdasarkan hasil penelitian dapat disimpulkan bahwa bahan biomaterial kulit buah atap efektif dalam menyerap logam berat dalam larutan dan biomaterial ini dapat dipertimbangkan untuk skala yang lebih lanjut.Kata kunci : Buah atap, Arenga pinnata, logam massa, biosorpsi, fourier transform infrared spectroscopy (FTIR), dan scanning electron microscope (SEM)
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Ma, Hongyang, Benjamin Hsiao, and Benjamin Chu. "Electrospun Nanofibrous Membrane for Heavy Metal Ion Adsorption." Current Organic Chemistry 17, no. 13 (June 1, 2013): 1361–70. http://dx.doi.org/10.2174/1385272811317130003.

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Schroden, Rick C., Mohammed Al-Daous, Sergey Sokolov, Brian J. Melde, Justin C. Lytle, Andreas Stein, Mari Carmen Carbajo, José Torralvo Fernández, and Eduardo Enciso Rodríguez. "Hybrid macroporous materials for heavy metal ion adsorption." J. Mater. Chem. 12, no. 11 (2002): 3261–67. http://dx.doi.org/10.1039/b204065b.

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Dong, Guo Ri, and Yan Zhang. "Diatomite Modification and its Adsorption of Heavy Metal Ions." Advanced Materials Research 864-867 (December 2013): 664–67. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.664.

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Diatomite plays a very important role in sewage adsorption and especially has vast prospect in adsorbing heavy metal ions. The paper, on the basis of domestic and overseas literatures concerning diatomite, summarizes the modification methods of diatomite and adsorption research of heavy metal ions. Besides, it also forecasts the prospect of using diatomite to specifically adsorb heavy metal ion.
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Zhou, Xiu Yan, and Xiang Xin Xue. "Study on Adsorption of Heavy Metalion in Metallurgical Wastewater by Sepiolite." Advanced Materials Research 726-731 (August 2013): 2585–88. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.2585.

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In this study, the sorption of heavy metals (Cu2+, Pb2+, Zn2+ and Cd2+) from simulated metallurgical wastewater by sepiolite under different dosage, pH, adsorption time and temperature conditions was investigated. The results showed that adsorption increased with the increase of adsorbent dosage until the adsorption equilibrium was reached. When the pH is 6, adsorption of heavy metal ions by sepiolite was in the order of Cu2+ > Zn2+ > Pb2+ > Cd2+ and removal rates of the metal ion were 91%, 90%, 91%, 84%, respectively. The effect of adsorption time on adsorption was not significant. At room temperature, with the adsorption time 45 min, the adsorption of metal ions is almost saturated, adsorption of Cu2+, Pb2+, Cd2+ and Zn2+ was 13.05mg/g, 85.47mg/g, 62.36mg/g and 15.67mg/g, respectively.
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Dissertations / Theses on the topic "Heavy metal ion adsorption"

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Jia, Yong Feng. "Adsorption of heavy metal ion species from aqueous solution in activated carbon." Thesis, University of Newcastle Upon Tyne, 2000. http://hdl.handle.net/10443/519.

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Activated carbons are used widely for the adsorption of environmentally unfriendly species from both liquid and gas phases, the separation of gases and adsorption of species from aqueous solution. Examples of the processes are the adsorption of Au(CN)2 and Ag(CN)2 from aqueous solution for the recovery of precious metals, the treatment of waste water containing organic chemicals and toxic metal species and the preparation of metal catalysts supported on carbon. This investigation has involved the study of the influence of porous structure and surface functional groups on the adsorption of both anionic and cationic metal species in order to understand the mechanism of adsorption of these species on active carbon from aqueous solution. Various types of oxygen functional groups were introduced onto the surface of coconut shell derived activated carbon through oxidation using nitric acid. Fourier transform infrared spectroscopy (FTIR), temperature programmed desorption (TPD) and selective neutralisation were used to characterise the surface oxygen functional groups. The oxidised carbons were also heat treated to provide a suite of carbons where the oxygen functional groups of various thermal stability were varied progressively. It was found that acidic oxygen functional groups mainly as carboxylic acid groups were incorporated into activated carbon by HNO3 oxidation. The phenol and quinone groups were also introduced by the oxidation process while the lactone groups were formed during heat treatment. The oxygen functional groups had a range of thermal stabilities with carboxylic acid groups being the least stable. A coconut shell derived active carbon was treated with ammonia and nitric acid followed by ammonia to incorporate nitrogen functional groups into the carbon. Active carbon with high nitrogen content was also prepared from nitrogen-rich precursor polyacrylonitrile (PAN). X-ray absorption near edge structure spectroscopy (XANES) and FTIR were used to investigate the structures of the nitrogen functional groups in carbons. The possible nitrogen functional groups present on carbon surface were pyridinic, pyrrolic (or indolic), pyridonic and aromatic amine-like structures. The adsorption characteristics of gold and silver cyanide anionic species on a suite of active carbons derived from coconut shell, polyacrylonitrile and chemical modification of the coconut shell carbon were investigated. The gold and silver cyanide adsorption capacities for coconut shell derived carbons correlate with total pore volume. Nitric acid oxidation treatment of the carbon was detrimental to gold adsorption in spite of the incorporation of oxygen content of carbon. The influence of nitrogen functional groups in the carbon structure on gold and silver adsorption was investigated using carbons derived from polyacrylonitrile. The addition of ethanol and butanol to the solution had an adverse effect on gold adsorption. Adsorption of silver cyanide ionic species on the active carbon was suppressed in the presence of excess free cyanide ions in solution whereas gold cyanide adsorption was not greatly affected at room temperature. The adsorption of gold cyanide was suppressed by the excess free cyanide and sodium sulphide at 70 °C. The adsorption of cadmium ions was enhanced dramatically by oxidation of the carbon. The ratio of released proton to adsorbed cadmium on oxidised carbon was approximately 2 indicating cation exchange was involved in the adsorption process. Na+ exchange studies with the oxidised carbon gave a similar ratio. After heat treatment of the oxidised carbons to remove oxygen functional groups, the ratio of H+/Cd2+ decreased significantly as well as the adsorption capacity. Both reversible and irreversible adsorption were involved in the process of cadmium adsorption with reversible adsorption having higher enthalpy. The irreversible adsorption resulted from cation exchange with carboxylic acid groups whereas the reversible adsorption probably involved physisorption of the partially hydrated cadmium ion. The nitrogen functional groups may act as ligands which can coordinate with transition metal cations. The adsorption of transition metal cations such as Cd 2+, Ni2+ and Cu2+ on active carbon was appreciably increased by the nitrogen functional groups present on carbon surface whereas ammonia treatment of the carbon showed little effect on the adsorption of alkali earth metal cation Cat+. There is little difference in the adsorption capacities of cadmium ions on coconut shell derived carbon at pH 4.1 and pH 7 whereas the adsorption of cadmium ions was significantly enhanced with increasing pH for the carbons with high nitrogen content. The nitrogen rich carbons show selectivity towards various transition metal cations reflected by adsorbing more Cu 2+ than Cd2+. This is consistent with the fact that the coordination compound of Cu 2+ with pyridine has higher stability constant than that of cadmium.
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Dietrich, Theo Henry. "The removal of heavy metals from dilute aqueous streams by the use of ion exchange resins." Thesis, Cape Technikon, 1998. http://hdl.handle.net/20.500.11838/887.

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Thesis (MTech (Chemical Engineering)--Cape Technikon, Cape Town, 1998
Ion exchange resins are widely used to remove or concentrate heavy metals from aqueous solutions or slurries.This thesis attempts to properly evaluate the interaction between ion exchange resins and heavy metals at trace metal concentrations.The durability of the resins and their effectiveness in real slurries were also investigated. In this study, a chelating resin, as well as a cation, and anion exchange resin was contacted with aqueous solutions of heavy metals in both free and complexed form. Zinc, nickel and copper cyanide complexes were adsorbed onto the anion exchange resin, while the chelating and cation exchange resins were contacted with zinc and nickel nitrates, and cupric sulphate. All the tests were conducted in batch stirred tank reactors. All the metal cyanide complexes behaved in a similar manner when contacted with the anion exchange resins. These tests were p~rf0nned under variations in temperature, stirring speed, pH., ionic strength and . initial metal 90E~entrations. Fitting of a dual resistance model to the profiles for thetlptllk:e" of the complexes, show that both film diffusion and intraparticle diffusion rates were improved with an increase in temperature, and that film diffusion rates improved with an increase in stirring speed. A high ionic strength negatively affected equilibrium loading as well as diffusional rates.It was found that at these low concentrations, the diffusional rates improves with a decrease in the external metal concentration. A comparative study involving the chelating and cation·exchange resins were performed, during which the resins were contacted with the metals in free fonn. It was found that at high metal concentrations, the chelating resin induced a rate limiting effect, but at trace concentrations, this effect is virtually negated. Whereas the cation exchange resin exhibited little selectivity in adsorbing the metals, it was found that the chelating resin prefers the metals in the eu > Ni > Zn. The chelating resin proved to be no less durable then the cation exchange resin, and both slightly lost their ability to adsorb the metal cations as a result of the effects of an inert coarse sand slurry.Tests performed with a real ore leachate, showed the cation exchange resin to be efficient at a low pH , but also relatively non selective, since the adsorption of copper from the leachate was greatly reduced due to the presence of other heavy metals.
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Kothalawala, Kothalawalage Nuwan. "Nanoporous high surface area silicas with chelating groups for heavy metal ion adsorption from aqueous solution /." View online, 2010. http://repository.eiu.edu/theses/docs/32211131524422.pdf.

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Keleşoğlu, Serkan Polat Hürriyet. "Comparative adsorption studies of heavy metal ions on chitin and chitosan biopolymers/." [s.l.]: [s.n.], 2007. http://library.iyte.edu.tr/tezlerengelli/master/kimya/T000622.pdf.

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Huang, Jing. "Functional Polymers Containing Semi-Rigid Alternating Sequences." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/89884.

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Alternating copolymers represent a special class of copolymers in which the two comonomers copolymerize in a regular alternating sequence along the polymer chain. Of particular interest in our group are the stilbene-maleic anhydride/maleimide alternating copolymers. These copolymers possess sterically congested backbones and precisely placed functional groups arising from the strictly alternating copolymerization. The research in this dissertation is focused on the synthesis, characterization, and potential application of functionalized copolymers that contain semi-rigid alternating copolymer sequences. The fluorescence properties of a series of non-conjugated, tert-butyl carboxylate functionalized alternating copolymers were investigated. Extraordinarily high fluorescent intensity with excellent linearity was observed for the di-tert-butyl group-containing stilbene and maleic anhydride alternating copolymer in THF. We attributed the origin of the strong fluorescence to the “through space” π – π interactions between the phenyl rings from the stilbene and C=O groups from the anhydride. The fluorescence was maintained when the copolymer was deprotected and hydrolyzed and the resulting carboxylic acid-functionalized copolymer was dissolved in water at neutral pH. The tert-butyl carboxylate functionalized alternating copolymer sequences were incorporated into highly crosslinked polymer networks using suspension polymerization. After removing the tert-butyl groups by acidic hydrolysis, the surface area of the networks increased significantly. Using this facile two-step strategy, we were able to achieve nanoporous polymers with BET surface area up to 817 m2/g and carboxylic acid-functionalized surfaces. The BET surface area of deprotected polymers increased with increasing crosslinking density, and the stilbene-containing polymers showed systematically higher BET surface area than the styrene-containing polymers due to the stiffness of the alternating sequences. The resulting nanoporous polymers have potential to be employed as solid sorbents for CO2. The same tert-butyl carboxylate functionalized alternating copolymer sequences were also incorporated into microgels via miniemulsion polymerization. The miniemulsion technique ensured the successful synthesis of microgels with ~100 nm diameter using solid stilbene and maleimide monomers. The resulting tert-butyl carboxylate-containing microgels were converted into carboxylic acid-containing aqueous microgels by acid hydrolysis. These aqueous microgels showed good and reversible lead and copper ion adsorption capacities. Amine-functionalized nanoporous polymers were synthesized by the post-modification of highly-crosslinked divinylbenzene-maleic anhydride polymers. High amine-contents were achieved by covalently attaching multiamines to the acid-chloride functionalized polymer surface. The resulting polymers showed medium to high BET surface areas (up to 500 m2/g) and high CO2 capture capacities.
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Ogunleye, Adetoro O. "Bacterial poly-gamma-glutamic acid (γ-PGA) : a promising biosorbent of heavy metals." Thesis, University of Wolverhampton, 2015. http://hdl.handle.net/2436/579925.

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Poly-γ-glutamic acid (γ-PGA) is a biopolymer made up of repeating units of L-glutamic acid, D-glutamic acid or both. γ-PGA is water soluble, non-toxic and biodegradable, and can be used safely in a variety of applications that are increasing rapidly. This study investigated the production of HMW γ-PGA by five Bacillus species (B. licheniformis 1525, B. licheniformis NCTC 6816, B. licheniformis ATCC 9945a, B. licheniformis ATCC 9945a and B. subtilis (natto) ATCC 15245) in GS, C and E media for the removal of heavy metals in wastewaters. The highest γ-PGA yields of 11.69 g/l and 11.59 g/l were produced by Bacillus subtilis (natto) ATCC 15245 in GS medium and medium C respectively. Upon characterization, γ- PGAs with different properties (crystallinity, acid/salt form and molecular weights ranging from 2.56 × 105 Da to 1.65 × 106 Da) were produced. The water soluble, non-toxic, HMW (Mw 1.65 × 106 Da) γ-PGA produced by B. subtilis (natto) ATCC 15245 in medium C was investigated as a sorbent for the removal of heavy metal ions including Cu2+, Zn2+, Ni2+, Cd2+ and Ag+. The results showed that the removal of metals by γ-PGA was more dependent on the concentration of γ-PGA than the solution pH. The highest metal ions removal of 93.50%, 88.13%, 90.21%, 90.56% and 86.34% by HMW γ-PGA were obtained for Cu2+, Zn2+, Ni2+, Cd2+ and Ag+ respectively. The presence of interfering metal ions could hinder the adsorption of individual metal ions by γ-PGA. The affinities of heavy metal ions for γ-PGA followed the order: Cu2+ > Zn2+ > Ni2+ > Cd2+. The effect of molecular weight of γ-PGA on metal removal was also investigated, and it was found that metal ion adsorption capacity of γ-PGA strongly depended on its molecular weight. The maximum amount (93.50%) of Cu2+ sorbed by HMW γ-PGA was higher compared to that (59.48%) sorbed by LMW γ-PGA. Isotherm models showed that the Redlich-Peterson best described the metal adsorption capacity of γ-PGA. It was also found that a multisite adsorption mechanism occurred via the complexation of metal ions with the free α-carboxyl and possibly the amide functional groups in γ-PGA.
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Terdkiatburana, Thanet. "Simultaneous removal process for humic acids and metal ions by adsorption." Curtin University of Technology, Dept. of Chemical Engineering, 2007. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=18564.

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Humic substances are macromolecules that naturally occur in all environments in which vegetation matter are present. In general, humic acid is part of humic substances which form the major fraction of the dissolved organic matters in surface water and represents 90% of dissolved organic carbon. Humic acid plays a fundamental role in many ecosystems since it interacts with toxic metal ions present in the system, resulting in a decrease in the bio-availability of such ions. Moreover, the availability of humic acid in water can react with other chemical compounds, such as chlorine to form trihalomethanes (including chloroform) and causes an increasing risk of cancer and may be linked to heart, lung, kidney, liver, and central nervous system damage. Therefore, humic acid removal in water treatment processes is very important in order to achieve the drinking water standards. Heavy metals are significant contaminants in aqueous system. All heavy metals can produce toxicity when ingested in sufficient quantities, but there are several important ones such as lead, mercury, copper, cadmium, arsenic, nickel and silver. These heavy metals are so pervasive and produce toxicity at low concentrations. Moreover, they may build up in biological systems and become a significant health hazard.
Adsorption is approved as an effective and simple method for water and wastewater treatment process. Many adsorbents then are developed for use in adsorption process such as montmorillonite, peat, activated carbon, etc. In this research, humic acid and heavy metals were mainly selected for adsorption study. In the sorption experiment, several adsorbents such as synthesised zeolite (SZ), natural zeolite (NZ), powdered activated carbon (PAC) and fly ash (FA), were selected to examine the application of HA and heavy metals both in individual and simultaneous adsorption, The characteristics and interactions of the adsorbents with HA and heavy metals were systematically studied by batch laboratory experiments. In the beginning, the adsorption of HA onto SZ, NZ, PAC and FA was investigated and their adsorption capacity was compared. The equilibrium adsorption of HA on SZ, NZ, PAC and FA was found to be 84.1, 67.8, 81.2 and 34.1 mg/g, respectively, at 30 oC and pH 5.0. Dynamic adsorption data show that these adsorbents could reach their adsorption equilibrium after 50 hours. From pH analysis, HA adsorption is favoured at low pH and an increase in pH will lead to the reduction of HA adsorption. SZ and NZ adsorption capacity were affected by the changing of solution temperature; however, in PAC and FA sorption study, there was no significant effect observed. Two heavy metal ions (Cu, Pb) removal by the adsorbents was then conducted. The results showed that the equilibrium sorption capacity of Cu and Pb ions on SZ, NZ, PAC and FA were 43.5, 24.2, 19.7, 28.6 and 190.7, 129.0, 76.8 mg/g, respectively at 30 oC and a pH value of 5. The appropriate pH for Cu and Pb removal was found to be 5 and 6. In most dynamic cases, these adsorbents needed at least 50 hours to reach the adsorption equilibrium. Only adsorption on FA required more than 150 hours to reach the equilibrium.
In simultaneous adsorption experiments, the influences of HA and heavy metal concentration (in the range of 10 to 50 mg/L for HA and 10 to 30 mg/l for heavy metals) on the HA-heavy metal complexation were investigated. The results demonstrated that increasing HA concentration mostly affected Cu adsorbed on SZ, FA and PAC and Pb adsorbed on SZ, NZ and PAC. For HA adsorption, the adsorption rate decreased rapidly with increased initial metal ion concentration. Moreover, the adsorption of heavy metals increased with increased heavy metals concentration in the presence of HA. In the presence of heavy metal ions, the order of HA adsorption followed PAC > FA > SZ > NZ. According to the results, the individual and simultaneous adsorption of HA and heavy metals on each adsorbent achieved a different trend. It mainly depended on the adsorption property of both adsorbates (HA and heavy metals) and adsorbents (SZ, NZ, PAC and FA) and also the operation factors such as pH, concentration, temperature and operation time. Even though this experiment could not obtain high adsorption performance, especially in coadsorption, as compared with other adsorbents, the adsorbents in this study represented a higher adsorption capacity and provide the potential for further development.
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Turemen, L. M. "Investigation of the adsorption of reactive dyes and heavy metal ions from synthetic textile effluent by eggshell membrane." Thesis, Queen's University Belfast, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368526.

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Sabolč, Pap. "Novi adsorpcioni medijumi za separaciju neorganskih polutanataotpadnih voda bazirani na termohemijskoj konverziji biomase." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2017. https://www.cris.uns.ac.rs/record.jsf?recordId=104791&source=NDLTD&language=en.

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Salih, Ali Mohammed. "The purification of industrial wastewater to remove heavy metals and investigation into the use of zeolite as a remediation tool." Thesis, University of Wolverhampton, 2018. http://hdl.handle.net/2436/621859.

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Zeolites are well-known aluminosilicate minerals that have been widely used as adsorbents in separation, purification processes and environmental pollution control. Zeolites are used in various industrial applications due to their high cation-exchange ability, molecular sieve and cataltic properties. In order to reduce the costs of acquisition and minimise the disposal of adsorbents, both modified natural zeolite and synthetic zeolite (derived from kaolinite) were used for the purification of wastewater. The characteristic properties and applications of adsorbents are also discussed including the advantages and disadvantages of each technique. The present work involves the study of the removal of Cu2+, Fe3+, Pb2+ and Zn2+ from synthetic metal solutions using natural zeolite. Laboratory experiments were used to investigate the efficiency of adsorbents in the uptake of heavy metals from industrial wastewater. These include equilibrium tests, kinetic studies and regeneration studies. The physical and chemical characterization of the zeolites was carried out using different analytical techniques such as Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), X - Ray Diffraction (XRD), X - Ray Fluorescence (XRF), Thermogravimetric Analysis (TGA), Fourier Transform Infrared (FT-IR) Spectroscopy and Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES). The kinetic study indicated the suitability of the natural zeolite for the removal of Cu2+, Fe3+, Pb2+ and Zn2+ ions from synthetic wastewater. Batch experiments were used to identify the effect of parameters that affect the rate of adsorption such as the effect of adsorbent mass, effect of adsorbent particle size, effect of initial solution pH, effect of initial solution concentration, effect of agitation speed and effect of pre-treatment of adsorbent and evaluated their impact on the efficiency of the zeolite in the removal of heavy metals from industrial wastewater. The kinetic studies showed that the capacity of the adsorbents for the removal of heavy metals increased with a greater mass of absorbent, increased initial solution pH, increased agitation speed, higher solution concentration as well as the application of a pre-treatment. The results from the equilibrium studies positively demonstrated that natural zeolite can be used as an excellent adsorbent for removing heavy metals from multi-component solutions. The equilibrium experiments indicated that the capacities of natural zeolite for the uptake of heavy metals increased when the initial solution pH increased. The results indicated that the maximum removal capacities Q were 22.83, 14.92, 14.49 and 17.54 mg/g natural zeolite for copper, iron, zinc, and lead respectively. Both the Langmuir and Freundlich isotherm models were used to characterize the experimental data and to assess the adsorption behaviour of natural zeolite for copper, iron, lead and zinc. The experimental data were slightly better suited to the Langmuir isotherm than the Freundlinch isotherm. The value of the correlation coefficients r2 ranged from 0.93 to 0.99 for the Langmuir isotherm and from 0.90 to 0.99 for the Freundlich isotherm. The present work also involved the study of synthetic zeolite A, which was derived from natural kaolinite. The conversion of the raw materials into zeolitic materials was carried out in two ways: first, conventional hydrothermal synthesis and second, alkaline fusion prior to hydrothermal synthesis. The results from both routes show that zeolite A was synthesised successfully. Finally, the experiments show that both natural and synthetic zeolites can be available in commercial quantities. Synthetic zeolites are more attractive for some specific applications, while the cheapness of natural zeolite may favour its use.
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Books on the topic "Heavy metal ion adsorption"

1

Brown, Jennifer. Heavy metal ion adsorption by thiol-functionalized nanoporous silica. Sudbury, Ont: Laurentian University, 1998.

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Volesky, Bohumil. Sorption and biosorption. St. Lambert, Québec: BV Sorbex, 2003.

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Yiacoumi, Sotira, and Chi Tien. Kinetics of Metal Ion Adsorption from Aqueous Solutions. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-2319-2.

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Yiacoumi, Sotira. Kinetics of metal ion adsorption from aqueous solutions: Models, algorithms, and applications. Boston: Kluwer Academic Publishers, 1995.

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Quek, Siew Young. Adsorption of heavy metal from aqueous solution by natural low-cost materials. Birmingham: University of Birmingham, 1998.

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Jeffers, T. H. Biosorption of metal contaminants using immobilized biomass: Field studies. Washington, D.C: U.S. Dept. of the Interior, Bureau of Mines, 1993.

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Jeffers, T. H. Biosorption of metal contaminants using immobilized biomass: Field studies. Washington, D.C: U.S. Dept. of the Interior, Bureau of Mines, 1993.

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Antonio Carlos A. da Costa. An emerging biotechnology for metal containing waste water treatment. Rio de Janeiro, RJ, Brasil: MCT, CNPq, CETEM, 1997.

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Antonio Carlos A. da Costa. An emerging biotechnology for metal containing waste water treatment. Rio de Janeiro, RJ, Brasil: MCT, CNPq, CETEM, 1997.

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Jeffers, T. H. Biosorption of metal contaminants using immobilized biomass: A laboratory study. Pgh. [i.e. Pittsburgh] PA: United States Dept. of the Interior, Bureau of Mines, 1991.

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Book chapters on the topic "Heavy metal ion adsorption"

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Akhalbedashvili, L., N. Gagniashvili, S. Jalaghania, N. Janashvili, R. Kvatashidze, G. Todradze, and N. Loria. "The Modified Natural Zeolites in Ion-Exchange Adsorption of Some Heavy Metals." In Advanced Materials, Polymers, and Composites, 23–32. New York: Apple Academic Press, 2021. http://dx.doi.org/10.1201/9781003105015-3.

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Meroufel, Bahia, and Mohamed Amine Zenasni. "Preparation, Characterization, and Heavy Metal Ion Adsorption Property of APTES-Modified Kaolin: Comparative Study with Original Clay." In Handbook of Environmental Materials Management, 1167–90. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-73645-7_132.

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Meroufel, Bahia, and Mohamed Amine Zenasni. "Preparation, Characterization, and Heavy Metal Ion Adsorption Property of APTES-Modified Kaolin: Comparative Study with Original Clay." In Handbook of Environmental Materials Management, 1–25. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-58538-3_132-1.

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Zhao, Lifang, Qingsong Liu, Shiyue Liu, Wencong Zhao, Haoming Li, and Bing Han. "Effects of biochar pyrolysis temperature on its characteristics and heavy metal adsorption." In Advances in Materials Science, Energy Technology and Environmental Engineering, 419–22. P.O. Box 11320, 2301 EH Leiden, The Netherlands, e-mail: Pub.NL@taylorandfrancis.com , www.crcpress.com – www.taylorandfrancis.com: CRC Press/Balkema, 2016. http://dx.doi.org/10.1201/9781315227047-84.

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Ding, Y. B., J. J. Wang, and Y. C. Xu. "Adsorption of aqueous heavy metal ions by a poly(m-phenylenediamine)/attapulgite composite." In Advances in Materials Science, Energy Technology and Environmental Engineering, 401–4. P.O. Box 11320, 2301 EH Leiden, The Netherlands, e-mail: Pub.NL@taylorandfrancis.com , www.crcpress.com – www.taylorandfrancis.com: CRC Press/Balkema, 2016. http://dx.doi.org/10.1201/9781315227047-80.

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Otsuka, Osamu, Ryo Nishizato, Minoru Okuno, Naoto Watanabe, Tsutomu Matsuo, Tomomichi Obuchi, Takashi Mizobuchi, et al. "Fundamental Study of Adsorption Thin Layers for Safe Storage of Heavy Metal Contaminated Soil." In Lecture Notes in Civil Engineering, 467–76. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0077-7_40.

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Świątkowski, Andrzej, Grzegorz Szymański, and Stanisław Biniak. "Adsorption from Aqueous Solutions of Selected Heavy Metal Cations on Chemically Modified Activated Carbon." In The Kluwer International Series in Engineering and Computer Science, 913–20. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1375-5_114.

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Suetake, Ryo, Kenichi Sato, Miyako Takeda, and Morimoto Tatsuo. "An Applicability of Dehydrated Cake Produced from Quarry to Impermeable Material with Heavy Metal Adsorption." In Advances in Environmental Geotechnics, 740–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-04460-1_89.

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Wu, Caiwen, Denggao Guan, Yinghui Cui, Dehao Hu, Yang Liu, Li Cheng, Xinghong Pu, and Jiayun Cao. "The Effect of Vermiculite Loaded with MnO2 on Adsorption of Heavy Metal Pb(II) in Wastewater." In Springer Proceedings in Energy, 309–16. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0158-2_34.

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Ranasinghe, E. N., and B. M. W. P. K. Amarasinghe. "Single and Binary Adsorption of Heavy Metal Ions from Aqueous Solutions Using Coirpith as the Adsorbent." In Lecture Notes in Civil Engineering, 75–90. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9749-3_7.

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Conference papers on the topic "Heavy metal ion adsorption"

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Zhongyi An, Maoan Du, Tongqin Zhang, and Huichao Zhang. "Characteristics of heavy metal ions adsorption by activated carbon." In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5964700.

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Bingtao Liu, Li Zhang, and Hairong Wang. "Study of adsorption of heavy metal ions onto new type resin." In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5966259.

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ZHAO, GEORGE X. S., J. L. LEE, and P. A. CHIA. "TITANOSILICATE ETS-10: SYNTHESIS, CHARACTERIZATION AND ADSORPTION FOR HEAVY METAL IONS." In Proceedings of the Third Pacific Basin Conference. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812704320_0056.

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YU, Hua-jiang, and Li-mei ZHOU. "Modification of manganese ore using a citric acid method and its adsorption for heavy metal ion." In The 2015 International Conference on Materials Engineering and Environmental Science (MEES2015). WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789814759984_0039.

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Liu, Sheng-Yu, Jin Gao, Bin Qu, and Yijin Yang. "Adsorption Behaviors of Heavy Metal Ions by Steel Slag-An Industrial Solidwaste." In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5162282.

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Yu, Chunguang, and Xuena Han. "The Adsorption of Coexisting Heavy Metal Ions by Modified Chinese Walnut Shell." In International Conference on Materials Engineering and Information Technology Applications (MEITA 2015). Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/meita-15.2015.87.

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Yulizar, Y., T. Utari, D. O. B. Apriandanu, and R. Utami. "Adsorption enhancement of heavy metal ions using chitosan-modified natural zeolite nanocomposite." In PROCEEDINGS OF THE 5TH INTERNATIONAL SYMPOSIUM ON CURRENT PROGRESS IN MATHEMATICS AND SCIENCES (ISCPMS2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0007927.

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Aprianti, Tine, Siti Miskah, Selpiana, Ria Komala, and Surya Hatina. "Heavy metal ions adsorption from pulp and paper industry wastewater using zeolite/activated carbon-ceramic composite adsorbent." In Proceedings of the 17th International Conference on Ion Sources. Author(s), 2018. http://dx.doi.org/10.1063/1.5054531.

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Shuqin Zhang and Shitang Tong. "The adsorption studies comparison of activated carbon for heavy metal ions of copper." In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering (RSETE). IEEE, 2011. http://dx.doi.org/10.1109/rsete.2011.5965582.

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BUCZEK, B., S. BINIAK, and A. SWIATKOWSKI. "DIFFERENTIATION OF ADSORPTION CAPACITY TOWARDS SELECTED HEAVY METAL IONS THROUGHOUT OXIDISED ACTIVATED CARBON GRANULE." In Proceedings of the Second Pacific Basin Conference. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793331_0020.

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Reports on the topic "Heavy metal ion adsorption"

1

Beltran, Michael R., Vladimir R. Mindin, and Rita V. Drondina. Heavy Metal Ion Removal and Wastewater Treatment by Combined Magnetic Particle and 3-D Electrochemical Technology. Fort Belvoir, VA: Defense Technical Information Center, March 1996. http://dx.doi.org/10.21236/ada363782.

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