Heavy metal adsorption using structurally preorganized adsorbent

Liang, Shuang; Cao, Shaokui; Liu, Changrong; Zeb, Shah; Cui, Yu; Sun, Guoxin

doi:10.1039/d0ra00125b

Cited by 12 publications

(2 citation statements)

References 36 publications

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“…When examining the sensitivity, selectivity, adsorption, and reusability, the use of certain functional organic ligands highlights the metal ions under specific circumstances and reduces the amount of experimental work required. It has been found that several organic materials, nanomaterials, and metalorganic frameworks have good kinetic performances and exhibit high Pb(II) ion adsorption rates [7][8][9][10][11][12][13][14][15][16][17]. However, it has continued to be difficult to regenerate conjugate adsorbent using strong acid, which produces secondary waste.…”

Section: ■ Introductionmentioning

confidence: 99%

Effect of Synthesis Temperature on Adsorbent Performance of Blending Anionic and Cationic Gels in Divalent Metal Ions Adsorption

Ningrum,

Suprapto,

Altway

et al. 2024

Indones. J. Chem.

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In this study, the anionic and cationic gels were synthesized separately using copolymerization between N-isopropylacrylamide (NIPAM) and acrylic acid or chitosan through a polymerization reaction using N,N'-methylenebisacrylamide (MBAA) as a cross-linker with various monomer concentrations and synthesis temperature. The anionic and cationic gels were blended to minimize inter-intra particle association and to improve the adsorption ability. The FTIR analysis found that the synthesis of the NIPAM-co-acrylic acid and NIPAM-co-chitosan gels was successfully carried out, indicating no presence of a vinyl group in the functional group. The result showed that the ion adsorption amount of Pb2+ ions blending gels increased significantly, almost twice compared to the adsorption before blending. The adsorption amount of Pb2+ ions increased with increasing the gel synthesis temperature. The adsorption amount follows the order of Pb2+ > Fe2+ > Ni2+. The adsorption amount of Pb2+ tends to decrease with increasing sedimentation volume. The higher the synthesis temperature, the larger the porous diameter formed. These results demonstrate that blending gel of NIPAM-co-chitosan and NIPAM-co-acrylic acid is a feasible alternative for removing heavy metal ions owing to its good adsorption performance.

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Section: ■ Introductionmentioning

confidence: 99%

Effect of Synthesis Temperature on Adsorbent Performance of Blending Anionic and Cationic Gels in Divalent Metal Ions Adsorption

Ningrum,

Suprapto,

Altway

et al. 2024

Indones. J. Chem.

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“…The sustainable management of water resources and the constantly deepening water deficit in the world forces the search for new technologies of wastewater treatment and the use of closed water circuits [ 12 , 13 ]. Currently, various methods are used to remove heavy metals from water, such as precipitation [ 14 ], adsorption [ 11 , 15 , 16 , 17 ], ion exchange [ 18 ], reverse osmosis [ 19 ], membrane filtration [ 20 ], electrolysis [ 21 ] and others [ 3 ]. However, many of these methods are associated with recontamination, low efficiency and high costs.…”

Section: Introductionmentioning

confidence: 99%

Removal of Pb(II), Cd(II) and Ni(II) Ions from Groundwater by Nonthermal Plasma

et al. 2022

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The removal of Pb(II), Cd(II) and Ni(II) ions from aqueous solutions by means of nonthermal plasma with a dielectric barrier discharge is investigated. Aqueous solutions with metal ion concentrations from 10 to 100 mg/dm3 in spring water were used. In the first stage, the optimization of the solution flow rate, generator modulation frequency and duty cycle was made in terms of the removal efficiency of the considered metals. The removal was then investigated as a function of the number of passes of the solution through the cold plasma reactor. The effect of the initial concentration of ions in the solution was studied. Techniques such as composite central design, least squares method and Fourier transform infrared spectroscopy were used. The physical and chemical parameters of the solutions, such as electrical conductivity, pH, temperature, concentration of metal ions and the content of other substances (e.g., total organic carbon), were measured, and the presence of microorganisms was also examined. It was found that each pass of the solution through the cold plasma reactor causes a decrease in the concentration of Cd(II) and Ni(II); the concentration of Pb(II) drops rapidly after one pass, but further passes do not improve its removal. The removal percentage was 88% for Cd(II) after six passes and 72% for Pb(II) after one pass, whereas 19% for Ni(II). The purification mechanism corresponds to the precipitation of metal ions due to the increasing pH of the solution after exposure to cold plasma.

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