Removal of Mercury (II) from Aqueous Solution Using Silver Nanocomposite: Synthesis and Adsorption Mechanism

An anionic biosorbent was derived from an industrial fermentation biowate, Corynebacterium glutamicum, by being cross-linked with polyethylenimine (PEI). A fiber form of the biosorbent was used to examine its potentiality of removing anionic metals such as As (V), Cr (VI) and Mn (VII) in aqueous system. As (V) and Cr (VI) were efficiently removed by the biosorbent through anionic adsorption mechanism. Sulfate ion seriously inhibited adsorption of the anionic metals through competitive inhibition with respect to the binding site of the biosorbent. In the case of Mn (VII), its removal mechanism by the biosorbent was not anionic adsorption. Mn (VII) was completely removed in aqueous phase, meanwhile, Mn (II) appeared and increased in proportion to the Mn (VII) depletion. As a result, adsorption coupled reduction was chosen as the mechanism of Mn (VII) removal by the biosorbent. In conclusion, the anionic biosorbent could be used to remove various anionic metals from aqueous solution through anionic adsorption or reduction mechanism.

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Fabrication and adsorption mechanism of chitosan/Zr-MOF (UiO-66) composite foams for efficient removal of ketoprofen from aqueous solution

Chemical Engineering Journal ◽

10.1016/j.cej.2021.134045 ◽

2021 ◽

pp. 134045

Author(s):

Jian Chen ◽

Jinbo Ouyang ◽

Wenqian Chen ◽

Zepeng Zheng ◽

Zhen Yang ◽

...

Keyword(s):

Aqueous Solution ◽

Adsorption Mechanism ◽

Efficient Removal ◽

Composite Foams

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Dispersion of TiO2 Nanoparticles in Aqueous Solution

Materials Science Forum ◽

10.4028/www.scientific.net/msf.922.8 ◽

2018 ◽

Vol 922 ◽

pp. 8-13

Author(s):

Wen Xiu Liu ◽

Peng Sun ◽

Jun Zhang ◽

Wen Bin Cao

Keyword(s):

Aqueous Solution ◽

Particle Size ◽

Mass Fraction ◽

Adsorption Mechanism ◽

Secondary Particle ◽

Aqueous Dispersion ◽

Ftir Analysis ◽

Carboxylate Groups ◽

The Stability ◽

Potential Test

Stable TiO2aqueous dispersion with an averaged secondary particle size of about 10 nm was achieved by using commercially available dispersant Di-7N. The stability of the dispersion was measured by Zeta-potential test. And the results showed that the optimal mass fraction of Di-7N was 12 wt%. The adsorption mechanism examined by FTIR analysis indicates that the carboxylate groups in Di-7N is absorbed on the surface of nano-TiO2particles and the adsorbed structure is proposed to be bidentate chelating.

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Pb(II) adsorption mechanism and capability from aqueous solution using red mud modified by chitosan

Chemosphere ◽

10.1016/j.chemosphere.2021.132279 ◽

2022 ◽

Vol 287 ◽

pp. 132279

Author(s):

Thi-Thuy Luu ◽

Van-Phuc Dinh ◽

Quang-Hung Nguyen ◽

Ngoc-Quyen Tran ◽

Duy-Khoi Nguyen ◽

...

Keyword(s):

Aqueous Solution ◽

Red Mud ◽

Adsorption Mechanism

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Biosorption of Textile Dye Red Bemacid ETL Using Activated Charcoal of Grape Marc (Oenological By-Product)

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.800.151 ◽

2019 ◽

Vol 800 ◽

pp. 151-156

Author(s):

Yamina Chergui ◽

Abdelkader Iddou ◽

Hafida Hentit ◽

Abdallah Aziz ◽

Jean Claude Jumas

Keyword(s):

Aqueous Solution ◽

Zinc Chloride ◽

Contact Time ◽

Adsorption Mechanism ◽

Activated Carbons ◽

Batch Adsorption ◽

Textile Dye ◽

Isothermal Adsorption ◽

Physical Methods ◽

Grape Marc

The objective of this study was the synthesis of various activated carbons from grape marc issued from oenological by-product as a biosorbent. The biosolid was then applied to remove an industrial dye (red bemacid ETL) in aqueous solution. Activation of the synthesized charcoal was carried out using a solution of zinc chloride induced by two physical methods (microwaves and heating at 300°C). The obtained materials are characterized by FTIR and SEM methods. Results from batch adsorption tests have shown that pH solution, initial dye concentration and contact time affect the adsorption mechanism. Removal of the industrial dye revealed second order kinetics, exothermic adsorption and isothermal adsorption of BET type.

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Phosphorus removal from aqueous solution in parent and aluminum-modified eggshells: thermodynamics and kinetics, adsorption mechanism, and diffusion process

Environmental Science and Pollution Research ◽

10.1007/s11356-017-9072-8 ◽

2017 ◽

Vol 24 (16) ◽

pp. 14525-14536 ◽

Cited By ~ 12

Author(s):

Ziyan Guo ◽

Jiuhai Li ◽

Zhaobing Guo ◽

Qingjun Guo ◽

Bin Zhu

Keyword(s):

Aqueous Solution ◽

Diffusion Process ◽

Phosphorus Removal ◽

Adsorption Mechanism ◽

Thermodynamics And Kinetics ◽

And Diffusion

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Adsorption behavior of carboxymethyl konjac glucomannan microspheres for fluoride from aqueous solution

RSC Advances ◽

10.1039/c6ra17183d ◽

2016 ◽

Vol 6 (92) ◽

pp. 89417-89429 ◽

Cited By ~ 5

Author(s):

Liping Wu ◽

Xiaoyan Lin ◽

Jiajie Wu ◽

Xingbao Zhou ◽

Xuegang Luo

Keyword(s):

Aqueous Solution ◽

Electrostatic Interaction ◽

Adsorption Mechanism ◽

Konjac Glucomannan ◽

Adsorption Behavior ◽

Schematic Diagram ◽

Carboxymethyl Konjac Glucomannan ◽

Coordination Reaction

The CMKGM–La–Al is characterized by SEM, EDX, and XPS. We find that adsorption mechanism of the adsorbent involved coordination reaction and electrostatic interaction. The schematic diagram of preparation of CMKGM–La–Al is shown as above.

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Theoretical Study of the Adsorption Mechanism of Cystine on Au(110) in Aqueous Solution

Small ◽

10.1002/smll.201602275 ◽

2016 ◽

Vol 12 (44) ◽

pp. 6134-6143 ◽

Cited By ~ 8

Author(s):

Susanna Monti ◽

Vincenzo Carravetta ◽

Hans Ågren

Keyword(s):

Aqueous Solution ◽

Adsorption Mechanism ◽

Theoretical Study

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The Adsorption Mechanism of Sodium Lignosulfonate on Al2O3 Particle in the Aqueous Solution

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.550-553.1120 ◽

2012 ◽

Vol 550-553 ◽

pp. 1120-1123

Author(s):

Rong Li ◽

Dong Jie Yang ◽

Wen Yuan Guo ◽

Xue Qing Qiu

Keyword(s):

Aqueous Solution ◽

Hydrogen Bond ◽

Driving Force ◽

Adsorption Mechanism ◽

Hydrophobic Interactions ◽

Adsorption Properties ◽

Sodium Lignosulfonate ◽

Ph Values ◽

Electrostatic And Hydrophobic Interactions ◽

Monolayer Coverage

The adsorption properties of sodium lignosulfonate (SL) on Al2O3 particles under different pH values have been investigated. Results show that at low pHs, SL adsorbs on the Al2O3 particles in the form of aggregate as dosage of SL increases; at high pHs, the adsorption is approximately monolayer coverage. With pH values ranging from 3 to 11, the adsorption results are found to be not significantly affected by the addition of urea, ruling out the hydrogen bond as the controlling factor. The paper demonstrates that the main driving force of adsorption is considered as the synergistic effect of electrostatic and hydrophobic interactions when pH pHIEP with additives of Na2SO4 and NaCl.

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