Organosilane grafted acid-activated beidellite clay for the removal of non-ionic alachlor and anionic imazaquin

被引：40

作者：

Paul, Blain ^{[1
]}

Martens, Wayde N. ^{[1
]}

Frost, Ray L. ^{[1
]}

机构：

[1] Queensland Univ Technol, Discipline Chem, Brisbane, Qld 4001, Australia

来源：

APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 13期

基金：

澳大利亚研究理事会;

关键词：

Adsorption; Beidellite; Silanation; Herbicide removal; SOLID-PHASE EXTRACTION; MONOVALENT ORGANIC CATIONS; WATER-PURIFICATION; PHENOLIC-COMPOUNDS; LAPONITE CLAY; MONTMORILLONITE; SORPTION; ADSORPTION; PESTICIDES; SURFACE;

D O I：

10.1016/j.apsusc.2011.01.034

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Clay adsorbents were prepared via two-step method to remove nonionic alachlor and anionic imazaquin herbicides from water. Firstly, layered beidellite clay, a member of smectite family, was treated with acid in hydrothermal process; secondly, common silane coupling agents, 3-chloro-propyl trimethoxysilane or triethoxy silane, were grafted on the acid treated samples to prepare adsorbent materials. The organically modified clay samples were characterized by powder X-ray diffraction, N-2 gas adsorption, and FTIR spectroscopy. It was found that the selective modification of clay samples displayed higher adsorption capacity for herbicides compared with acid activated clay. And the amount of adsorption is increased with increasing the grafting amount of silane groups. Clay grafted with 3-chloro-propyl trimethoxysilane is an excellent adsorbent for both alachlor and imazaquin but triethoxy (octyl) silane grafted clay is more efficient only for alachlor removal. (C) 2011 Elsevier B. V. All rights reserved.

引用

页码：5552 / 5558

页数：7

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