Atrazine biodegradation modulated by clays and clay/humic acid complexes

被引：44

作者：

Besse-Hoggan, Pascale ^{[1
]}

Alekseeva, Tatiana ^{[2
,3
]}

Sancelme, Martine ^{[1
]}

Delort, Anne-Marie ^{[1
]}

Forano, Claude ^{[3
]}

机构：

[1] Univ Clermont Ferrand, CNRS, UMR 6504, Lab Synth & Etude Syst Interet Biol, F-63177 Aubiere, France

[2] Russian Acad Sci, Inst Phys Chem & Biol Problems Soil Sci, Pushchino 142290, Moscow Region, Russia

[3] Univ Clermont Ferrand, CNRS, UMR 6002, Lab Mat Inorgan, F-63177 Aubiere, France

来源：

ENVIRONMENTAL POLLUTION | 2009年 / 157卷 / 10期

关键词：

Adsorption; Ca-bentonite; Layered Double Hydroxide; Humic acid; Pseudomonas sp ADP; LAYERED DOUBLE HYDROXIDES; HUMIC SUBSTANCES; SORPTION; SOIL; ADSORPTION; SURFACE; HYDROXYATRAZINE; SMECTITE; DEETHYLATRAZINE; BIOAVAILABILITY;

D O I：

10.1016/j.envpol.2009.04.005

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The fate of pesticides in the environment is strongly related to the soil sorption processes that control not only their transfer but also their bioavailability. Cationic (Ca-bentonite) and anionic (Layered Double Hydroxide) clays behave towards the ionisable pesticide atrazine (AT) sorption with opposite tendencies: a noticeable sorption capacity for the first whereas the highly hydrophilic LDH showed no interactions with AT. These clays were modified with different humic acid (HA) contents. HA sorbed on the clay surface and increased AT interactions. The sorption effect on AT biodegradation and on its metabolite formation was studied with Pseudomonas sp. ADP. The biodegradation rate was greatly modulated by the material's sorption capacity and was clearly limited by the desorption rate. More surprisingly, it increased dramatically with LDH. Adsorption of bacterial cells on clay particles facilitates the degradation of non-sorbed chemical, and should be considered for predicting pesticide fate in the environment. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2837 / 2844

页数：8

共 46 条

[1] Influence of humic acid on adsorption and desorption of atrazine, hydroxyatrazine, deethylatrazine, and deisopropylatrazine onto a clay-rich soil sample [J].