Improved adsorption and desorption behavior of Cd on thiol-modified bentonite grafted with cysteamine hydrochloride

Song, Ruiming; Li, Zhimei; Li, Wanli; An, Y.J.; Li, Mei; Qin, Haoli; Liu, Chengshuai

doi:10.1007/s11164-022-04711-y

Cited by 6 publications

(2 citation statements)

References 47 publications

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“…5) and the pseudo-second-order kinetic model (Eq. 6) were fitted to the experimental data [25][26][27][28] .…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Removal of U(VI) from aqueous solution by Al 0 /Ni 0 bimetallic material

Ma,

Sang,

Zhang

et al. 2024

Preprint

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The widespread use of nuclear energy has led to a growing concern over environmental pollution resulted from uranium which has prompted global attention on wastewater treatment. Al0 and Ni0 metals have been used by numerous researchers both domestically and internationally to removal U(VI) from aqueous solution due to their unique chemical properties. In this work, Al0/Ni0 bimetallic material (Al0/Ni0-BM) was prepared by synchronous liquid-phase reduction method. Due to the structure of bimetallic material and synergistic effect, it exhibited a higher removal rate compared with single zero valent metal. The uranium removal rate was 98.90%, well-fitting with the pseudo-second-order kinetic model, reduction model and Langmuir isothermal adsorption model. The high removal performance was attributed to the electron transfer mechanism between material and U element and the adsorption effect of corresponding hydroxides. The thermodynamic parameters demonstrated that the adsorption of U(VI) on the Al0/Ni0-BM was an endothermic and spontaneous process controlled by physical and chemical adsorptions. In conclusion, Al0/Ni0-BM showed an excellent potential for understanding U(VI) removal from aqueous solution by zero valent bimetallic materials.

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“…5) and the pseudo-second-order kinetic model (Eq. 6) were fitted to the experimental data [25][26][27][28] .…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Removal of U(VI) from aqueous solution by Al 0 /Ni 0 bimetallic material

Ma,

Sang,

Zhang

et al. 2024

Preprint

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“…However, natural Bentonite cannot be used effectively due to some inherent disadvantages such as low adsorption capacity, so some modification of Bentonite is needed to improve its economic value and usability. Some recent studies have shown that the adsorption of Cu, Pb, Cd, Zn and other metals by sulfhydryl modified Bentonite has shown unique superiority (Song, Li, Z., Li, W., An, Li, M., Qin, & Liu, 2022;Pang, Yang, Huang, Lei, Zeng, & Li, 2018). Considering that Ag and Cu, Pb, Cd, Zn, etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Material for Adsorption Ag(I) in the Solution

Gao¹,

Luo²,

Zhang³

et al. 2022

ASIR

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The application of silver in electronics, jewelry, catalytic and other industries often produces a large amount of silver-containing wastewater, which causes serious impact to the surrounding environment and human health, while silver has a certain economic value attached to it. Therefore, how to effectively treat and recover Ag(?) from the silver-containing wastewater is a hot topic of concern at present. In order to seek an efficient and environmentally friendly adsorbent, this paper compared the adsorption efficiency of purified, thermally modified, acid modified and thermally-acid modified Bentonite on silver, selected an economical and reasonable purified clay as a carrier, and then completed the preparation of modified Bentonite as well as the optimization of conditions with sodium silicate as a surfactant and 3-mercaptopropyltrimethoxysilane as a modifier. The experiments showed that under the conditions of sodium silicate dosage of 15% of Bentonite, Bentonite and modifier dosage of 1:1, solution pH of 9, temperature of 45 °C and modification time of 5 h, the synthesized sulfhydryl modified Bentonite has good adsorption performance on Ag(?), and its adsorption capacity can reach 293.7 mg·g-1.

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