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Updated: Sep 16, 2025

Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide
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Removal of Arsenic Using a Cationic Polymer Gel Impregnated with Iron Hydroxide

Published on: June 28, 2019

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通过封装硫化纳米级零价铁激活硫酸盐,以去除2,4-二二

Yajun Li1, Yongxiang Zhang2, Wenjing Yang2

  • 1Research Center of Environmental Pollution Control Technology, Engineering Technology Center of Wastewater Low-carbon Treatment and Resource Recovery, Chinese Research Academy of Environmental Sciences, No. 8 Dayangfang, Anwai Beiyuan, Chaoyang District, Beijing 100012, China.

Langmuir : the ACS journal of surfaces and colloids
|July 9, 2025
PubMed
概括

一种新的SA/PVA@SNZVI催化剂通过激活硫酸盐 (PDS) 有效地降解2,4-二二 (2,4-DCP). 这种可持续的方法可以实现完全去除2,4-DCP,并降低毒性.

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相关概念视频

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Electrophilic Aromatic Substitution: Sulfonation of Benzene

Sulfonation of benzene is a reaction wherein benzene is treated with fuming sulfuric acid at room temperature to produce benzenesulfonic acid. Fuming sulfuric acid is a mixture of sulfur trioxide and concentrated sulfuric acid.
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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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