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1

Chen, Hai Feng, Pei Song Tang, Min Hong Xu, and Feng Cao. "Isotherms for Aqueous Potassium Adsorption and Characterization of Natural Pyrophyllite." Materials Science Forum 694 (July 2011): 682–85. http://dx.doi.org/10.4028/www.scientific.net/msf.694.682.

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The present investigatory founded an effectiveness of inexpensive and eco-friendly alumina silicate clay minerals, sericitic pyrophyllite (SP), as an adsorbent for the possible application in the absorption of K+. The crystal structure of pyrophyllite, size and morphology were characterized by XRD and SEM. In addition to pyrophyllite, quartz and were also contained in the minerals. The area of lamellar SP was about dozens um2. The results showed that potassium was absorbed on the SP under different pH and concentrations, and the best condition was pH=6, the time of equilibrium absorption = 30
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2

Matsukawa, Yuji, and Kazuo Umemura. "Detection of Redox Properties of (6,5)-Enriched Single-Walled Carbon Nanotubes Using Potassium Permanganate (KMnO4)." C — Journal of Carbon Research 6, no. 2 (2020): 30. http://dx.doi.org/10.3390/c6020030.

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It has been reported that even if single-walled carbon nanotubes (SWNTs) are coated with the same polymer, the redox characteristics change of each chirality may differ. Particularly, the addition of hydrogen peroxide (H2O2) minimally affects the near-infrared (NIR) absorption spectra of the dsDNA-(6,5)-enriched SWNT complex (DNA-SWNT complex). Detecting the redox properties of (6,5) chirality using NIR absorption spectra has been one of the issues to be solved. We hypothesized that an oxidizing agent with high oxidizing power is required to detect the absorption spectra of (6,5) chirality. In
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3

Wang, Song Mei, Lu Kuan Liu, and Wan Zhen Xu. "Study on the Adsorption Behavior of Chrome and Manganese on Potassium Tetratitanate Whisker." Advanced Materials Research 534 (June 2012): 126–30. http://dx.doi.org/10.4028/www.scientific.net/amr.534.126.

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A new method for the separation and preconcentration of Chrome and Manganese using potassium titrationate whisker was developed prior to the determination by FAAS. The influences of analytical parameters including amount of sorbent, the adsorption capacity, the coexistence ion influence and the adsorption behavior were also studied by the flame atomic absorption spectrometry, the effects of concomitant ions were also examined. The detection limits (3s) were 15ng•mL-1 and 44 ng•mL-1. The method was applied to the determination of analytes in real samples, such as tea and environmental samples,
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4

Pita Rengga, Wara Dyah, Maharani Rani, and Ashar Shidqi. "Application Of Activated Candlenut Shell Using Potassium Hydroxide For Iron Reduction (Fe TO FeSO4)." Journal of Chemical Process Engineering 4, no. 2 (2019): 63–67. http://dx.doi.org/10.33536/jcpe.v4i2.437.

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This study aims to prepare carbon from candlenut shell by carbonation and activation of 1M KOH which is used to adsorb Fe 2+ in solution. The activation process produces changes in structure and functional groups on activated carbon. This study studied the effect of carbonation temperatures of 800 o C with the concentration of activator is KOH 1M with 24 hours activation time. The initial concentration of the solution affects the adsorption capacity of activated carbon, the greater the initial concentration of the solution which is at 5 mg/L, the greater the adsorption capacity. Optimum adsorp
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5

Harnnarongchai, Wanlop, and Kantima Chaochanchaikul. "Effect of Blowing Agent on Cell Morphology and Acoustic Absorption of Natural Rubber Foam." Applied Mechanics and Materials 804 (October 2015): 25–29. http://dx.doi.org/10.4028/www.scientific.net/amm.804.25.

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The sound absorbing efficiency of natural rubber (NR) foam is affected by the cell morphology of foam. Potassium oleate (K-oleate) and sodium bicarbonate (NaHCO3) were used as blowing agents to create open-cell foam. Amounts of the blowing agent were varied from 0.5 to 8.0 part per hundred of rubber (phr) to evaluate cell size and number of foam cell as well as sound adsorption coefficient of NR foam. The NR foam specimens were prepared using mould and air-circulating oven for vulcanizing and foaming processes. The results indicated that K-oleate at 2.0 phr and NaHCO3 at 0.5 phr led to form NR
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6

Таmarkina, Ju V., I. B. Frolova, O. O. Velichko, and V. O. Кucherenko. "ADSORPTION OF PHENOL COMPOUNDS BY ACTIVATED CARBON FORMED DURING CARBONIZATION OF BROWN COAL WITH POTASSIUM HYDROXIDE." Journal of Coal Chemistry 2 (2021): 21–32. http://dx.doi.org/10.31081/1681-309x-2021-0-2-21-32.

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The aim of the work is to evaluate the adsorption capacity of activated carbons (ACs) from brown coal in relation to phenol (Ph) and 4-chlorophenol (CPh) and the influence of the AСs formation temperature under carbonization with potassium hydroxide on capacities. The samples of ACs were prepared by heating with KOH (1 g/g, 1 h) at a given temperature in the range of t=400-800°C and marked as AC(t). The ACs porosity characteristics were determined by low-temperature (77 K) adsorption – desorption nitrogen isotherms (Micromeritics ASAP 2020) calculated by the 2D-NLDFT method. They are as follow
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7

Leman, Abdul Mutalib bin, Muhammad Syafiq Muzarpar, Mohd Norhafsam Maghpor, et al. "Development of Palm Shell Base Activated Carbon for Volatile Organic Compounds (VOCs) Emissions Absorption." International Journal of Advanced Technology in Mechanical, Mechatronics and Materials 2, no. 1 (2021): 35–45. http://dx.doi.org/10.37869/ijatec.v2i1.42.

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High concentration of indoor air contaminant commonly released by human activities, furniture, building materials, carpets, cleaning product and paints. BTEX contains Benzene, Toluene, Ethylbenzene and Xylene (BTEX) is categorized into VOCs which are indicative of harmful chemicals especially for indoor air. Therefore, it needs the sampling media for absorption before it could be analyse in the specific laboratory. One of the challenging technology to absorb BTEX is by using Palm Shell Activated Carbon (PSAC). Malaysia has a second largest country that produce palm oil which led to abundant of
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8

Solihudin, Solihudin, Atiek Rostika Noviyanti, and Iman Rahayu. "Pengaruh Ukuran Partikel Arang Sekam Padi Dan Waktu Refluks terhadap Kadar Abudan Daya Serap Karbon Sekam Padi." Jurnal Natur Indonesia 17, no. 1 (2017): 33. http://dx.doi.org/10.31258/jnat.17.1.33-41.

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The highest content in rice husk is ash with its main component of silica. Silica in ash causes the low adsorption capacity. Activated carbon from rice husk can be obtained by lowering the ash content. The aim of this study is determine the effect of particle size of charcoal and reflux time the ash content using a solution of potassium carbonate. The activation of rice husk char was carried out by using reflux methods with a potassium carbonate solution. The resulted carbon was washed using hydrochloric acid tested using iodine and methylene blue to examine of its adsorbance. The particle siz
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9

Vu, Kim Long, Vitaly N. Klushin, Alexey V. Nistratov, Hoang Thi Tho, and Tran Thi Bich Ngoc. "Improving the properties of activated carbons based on organoplastics by chemical activation with potassium hydroxide (KOH)." Butlerov Communications 60, no. 10 (2019): 99–109. http://dx.doi.org/10.37952/roi-jbc-01/19-60-10-99.

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The possibility of processing wastes based on organoplastics generated at aviation enterprises into activated carbons by chemical activation using potassium hydroxide has been investigated. Powdered and granular activated carbons with a porous structure, characterized by the predominance of micropores or mesopores, are obtained that are superior in many respects to both adsorbents based on organoplastics and most industrial active carbons. The specific surface area of micropores of the obtained granular activated carbons is 1716 m2/g, the absorption capacity is 365 mg/g for methylene blue and
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10

Luo, Liu Dan, Hai Yi Huang, Jian Hong Bi, Lang Lang Tan, Hua Zhang, and Di Zhang. "Optimization of Malachite Green by KOH-Modified Grapefruit Peel Activated Carbon: Application of Response Surface Methodology." Applied Mechanics and Materials 529 (June 2014): 611–15. http://dx.doi.org/10.4028/www.scientific.net/amm.529.611.

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Response surface methodology (RSM) was utilized to optimize the best adsorbent conditions on Malachite Green in wastewater by the activated carbon which has been prepared from grapefruit peel with potassium hydroxide activating. Built on single-factor experiment, adsorbent dosage, pH, initial MG concentration and temperature were chosen as influencing factors during adsorption. The experimental mathematical model was arranged according to central composite design (CCD). The results shown that the best conditions were pH 9, initial MG concentration of 2000 mg/L, 1 g/L dosage of KAC and 40°C. Ma
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11

Awitdrus, Awitdrus, Meylia Susiana Dewi Putri, Romi Fadli Syahputra, Iwantono Iwantono, and Saktioto Saktioto. "Activated Carbon Based on Pineapple Crown for Heavy Metal Adsorption." Advanced Materials Research 1162 (April 2021): 57–64. http://dx.doi.org/10.4028/www.scientific.net/amr.1162.57.

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The objectives of this study are to investigate the influence of concentration variation of potassium hydroxide (KOH) and to remove a heavy metal in liquid waste of the activated carbon. The raw material of activated carbon was obtained from pineapple crown waste. Pineapple crowns pre-carbonized at 180 oC for 1 hour. Chemical activation was carried out using KOH with concentration 2M, 3M, and 4M for 20 hours at 30 oC and temperature 60 oC for 2 hours. Microwave irradiation was conducted at 630 Watt of output power for 15 minutes. The physical properties of activated carbon were characterized u
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12

Smiles, D. E., and C. J. Smith. "Absorption of gypsum solution by a potassic soil: a data set." Soil Research 46, no. 1 (2008): 67. http://dx.doi.org/10.1071/sr07103.

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Reliable experimental data required to test hydrodynamic dispersion/chemical reaction models are scarce. This paper provides such a dataset based on absorption of gypsum solution by horizontal columns of relatively dry soil with an initially high exchangeable potassium ratio. Initial and boundary conditions are well defined. Water and cation concentration profiles measured after 200 and 400 min lay on single curves when graphed in terms of distance divided by the square root of time. Cation exchange occurred close to the intake surface and calcium derived from the gypsum was confined to a narr
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13

Li, Gui Feng, Qing Hua Liu, Chuan Sheng Li, et al. "The Research of Chromatography Media in Separating and Purifying the Gangliosides of Porcine Brain." Advanced Materials Research 236-238 (May 2011): 2872–76. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.2872.

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Ganglioside is a kind of acidic glycosphingolipid containing sialic acid. It is the major component of nerve cells and has a very important biological activity. This study is based on the molecular structure of ganglioside and the absorption of stovall stone to various ions. The chromatography media made by stovall stone loading chitosan has a better adsorption to gangliosides. The experiment showed that the best adsorption parameters are 8BV, chloroform: methanol (1:4), PH = 5.5, temperature is 2.0°C; Resolution: the mixture of chloroform, methanol and 0.9 mol/L NaAC (30:58:12 v/v/v) which is
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14

Zhou, Yahui, Shaobo Liu, Yunguo Liu, Xiaofei Tan, Ni Liu, and Jun Wen. "Efficient Removal 17-Estradiol by Graphene-Like Magnetic Sawdust Biochar: Preparation Condition and Adsorption Mechanism." International Journal of Environmental Research and Public Health 17, no. 22 (2020): 8377. http://dx.doi.org/10.3390/ijerph17228377.

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The occurrence of environmental endocrine disrupting chemicals (EDCs) in aquatic environments has caused extensive concern. Graphene-like magnetic sawdust biochar was synthesized using potassium ferrate (K2FeO4) to make activated sawdust biochar and applied for the removal of 17-estradiol (E2). The characterization showed that the surface morphology of five graphene-like magnetic sawdust biochars prepared with different preparation conditions were quite different. The specific surface area and pore structure increased with the increment of K2FeO4 addition. The results have shown that graphene-
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15

Peng, Yijie, Muhua Liu, Jinhui Zhao, et al. "Determination of Benzylpenicillin Potassium Residues in Duck Meat Using Surface Enhanced Raman Spectroscopy with Au Nanoparticles." Journal of Spectroscopy 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/7086723.

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A new method using surface enhanced Raman spectroscopy (SERS) with Au nanoparticles was established for the rapid detection of benzylpenicillin potassium (PG) residues in duck meat. Au nanoparticles were used as SERS enhancement substrate, and the maximum absorption peak of Au nanoparticles using the UV-Vis spectrophotometer was 548 nm. In the research, the SERS spectra of PG solutions and PG duck meat extract as well as their vibrational assignment were analyzed. The effects of Au nanoparticles addition, sample addition, NaCl solution addition, and adsorption time on the SERS intensities of P
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16

Maqsood, Hafza, Shah Rukh, Muhammad Imran, et al. "Evaluation of laterite as filter media to remove arsenic from groundwater." Journal of the Serbian Chemical Society, no. 00 (2020): 57. http://dx.doi.org/10.2298/jsc200310057m.

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Arsenic (As) in drinking water has a chronic effect on humans and thus is a global health issue. Mostly people of Pakistan use groundwater for drinking, consequently prone to As toxicity. The objective of this study was to evaluate laterite as an adsorbent media for As removal, and subsequent preparation of a low-cost As filter. Laterite was tested for As adsorption capacity through batch sorption experiment and fitting Langmuir model. Two identical filters were prepared using a variable particle size of laterite and substrate material ratios (sand, activated carbon, and brick chips). Arsenic
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17

Adebayo, Kehinde Ibrahim, Victor Etim Nyong, and Oluwaseye Peter Amah. "Physicochemical properties of groundwater in parts of Irun Akoko, Ondo State, Nigeria." Global Journal of Geological Sciences 19, no. 1 (2021): 85–91. http://dx.doi.org/10.4314/gjgs.v19i1.7.

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Ten groundwater samples from hand dug wells were collected at Irun Akoko within the basement complex of part of southwestern Nigeria. The aim of the study was to determine the groundwater suitability for both drinking and irrigation purposes. The groundwater samples were analysed for some physical and chemical constituents including pH, Total Dissolved Solids (TDS), turbidity, Na, Ca, Mg, K, Cl, SO4, PO4 and NO3. The pH (7.0 – 7.9) and TDS (12.26 – 19.35 mg/l) of the groundwater indicate that the water is neutral to slightly alkaline and fresh respectively. The order of relative abundance for
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18

Queiroz, Sérgio Oliveira Pinto de, and Leonardo Theodoro Bull. "ABSORÇÃO DE CÁTIONS E PRODUÇÃO DE MATÉRIA SECA POR GENÓTIPOS DE ALGODÃO SOB CONDIÇÕES SALINAS." IRRIGA 6, no. 3 (2001): 104–10. http://dx.doi.org/10.15809/irriga.2001v6n3p104-110.

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ABSORÇÃO DE CÁTIONS E PRODUÇÃO DE MATÉRIA SECA POR GENÓTIPOS DE ALGODÃO SOB CONDIÇÕES SALINAS. Sérgio Oliveira Pinto de QueirozDoutorando, Faculdade de Engenharia Agrícola, Universidade Estadual de Campinas, Departamento de Água e Solos, Campinas, SP, Bolsista CNPq. CEP 13093.970,Cx. Postal 6011, tel.: (19) 788 1029, fax: (19) 788 1010.E-mail: queiroz@agr.unicamp.br.Leonardo Theodoro Büll Faculdade de Ciências Agronômicas UNESP - Departamento de Recursos Naturais, Fazenda Experimental Lageado, Botucatu, SP. CEP 18603 970, Cx. Postal 237, telefax: (14)6802 7169.E-mail: bull@fca.unesp.br 1 RESUM
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19

Norizan, Mohd Nurazzi, and Rahmah Mohamed. "EFFECT OF SYNTHESIS REACTION TIME AND DOPING ON UV/VIS ABSORPTION OF POLYENE COATING." Jurnal Teknologi 79, no. 2 (2017). http://dx.doi.org/10.11113/jt.v79.8436.

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Absorbance spectra and energy band gap of synthesizing polyene from dechlorination of polyvinyl chloride (PVC) with varying synthesizing reaction times and doping percentages were examined in this paper. The reaction time of dechlorination was varied from 30 minutes, 1 hour, 2 hours and 4 hours. Polyene obtained from the dechlorination reaction was doped with potassium iodide (KI). Sample for UV/Vis test was prepared in the form of film. Modified EO film as control sample showed that there is only a single absorption peak around 327nm. The C-Cl adsorption band link from source link polymer was
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20

Yang, Wenjun, Xiaoyuan Li, and Nai-Teng Yu. "Bifunctional Electrocatalytic Films with Gold Nanoparticles and Metalloporphyrin: Preparation and Characterization." MRS Proceedings 676 (2001). http://dx.doi.org/10.1557/proc-676-y3.26.

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ABSTRACTBifunctional electrocatalytic films were prepared employing a layer-by-layer assembly approach. The cation, metalloporphyrin (MP), and the anion, potassium tetrachloroaurate (KAuCl4) were alternatively assembled on glass or indium-doped tin oxide (ITO) supports. The assembled AuCl4- ions were then converted to gold nanoparticles (Aun) under the exposure to ultraviolet light. Film growth at each adsorption step was monitored by UV-Vis absorption spectroscopy and cyclic voltammetry (CV). The formation of gold nanoparticles was characterized by UV-Vis absorption spectroscopy, X-ray diffra
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21

"Getting Graft Cellulose Copolymers and Acrylic Monomers." International Journal of Recent Technology and Engineering 8, no. 4 (2019): 719–23. http://dx.doi.org/10.35940/ijrte.d6816.118419.

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Graft copolymers of acrylic monomers with cotton cellulose were obtained. The dependence of the degree and efficiency of grafting of acrylic acid and methyl methacrylate to cellulose on the concentration of monomer and initiator was investigated. Pre-adsorption of the initiator in the macromolecules of cellulose leads to an increase in the efficiency of the grafting. The efficiency of grafting is higher in those systems in which the initiator used is insoluble in the monomer solvent. Absorption of cellulose with an aqueous solution of the initiator - potassium persulfate, followed by removal o
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22

Samardokas, Linas, Remigijus Ivanauskas, Skirma Žalenkienė, and Algimantas Ivanauskas. "Influence of chemical composition and doping on optical properties of thallium selenide layers prepared by adsorption/diffusion method." Chemija 32, no. 2 (2021). http://dx.doi.org/10.6001/chemija.v32i2.4431.

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In this work, we investigated the formation of Tl-Se layers followed by doping with metal cations. A two-stage adsorption/diffusion process used to form Tl-Se layers involves (a) selenization in potassium selenotrithionate solution followed by (b) treatment with Tl+ precursor solutions. These layers have been successfully doped with Cu+/Cu2+, Ga3+ and Ag+ cations using a cation exchange reaction. The resulting chemical compositions of Tl-Se and Tl-M-Se (M = Cu, Ga, Ag) layers were investigated using the EDS and AAS methods. The bulk elemental composition and the Tl/Se molar ratio of the Tl-Se
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23

Zhang, Wei, Zhen Cao, Mian Wang, Xiaojiao Chen, and Baomin Wang. "Absorption, translocation, and effects of Bt Cry1Ac peptides from transgenic cotton to the intercrops and soil functional bacteria." Scientific Reports 10, no. 1 (2020). http://dx.doi.org/10.1038/s41598-020-73375-8.

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Abstract Insecticidal proteins encoded by the truncated genes from Bacillus thuringiensis (Bt) in transgenic crops are released into soil mainly through root exudate and crop residues. In the present study, Bt Cry1Ac protein was hydrolyzed by pronase that was secreted by the soil bacterium Streptomyces griseus. Six peptides were identified as the products of enzymatic hydrolysis by nano liquid chromatography tandem mass spectrometry (LC–MS/MS). One of the six peptides was labeled with radioactive isotope iodine-125 and then purified. The 125I-peptide solution was irrigated to the rhizosphere s
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