文献类型：期刊文献

英文题名：Rhizospheric effects on atrazine speciation and degradation in laterite soils of Pennisetum alopecuroides (L.) Spreng

作者：Lin, Zhong[1];Zhen, Zhen[1];Chen, Changer[2];Li, Yongtao[3];Luo, Chunling[3];Zhong, Laiyuan[1];Hu, Hanqiao[1];Li, Jin[1];Zhang, Yueqin[1];Liang, Yanqiu[1];Yang, Jiewen[1];Zhang, Dayi[4,5]

机构：[1]Guangdong Ocean Univ, Coll Chem & Environm, Zhanjiang 524088, Peoples R China;[2]Stockholm Univ, Dept Environm Sci & Analyt Chem ACES, SE-10691 Stockholm, Sweden;[3]South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China;[4]Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China;[5]Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England

年份：2018

卷号：25

期号：13

起止页码：12407

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：SCI-EXPANDED(收录号：WOS:000431883500020)、、WOS

基金：This work was financially supported by the National Natural Science Foundation of China (41301252, 41671235, and U1401234), Natural Science Foundation of Guangdong (2016A030310330 and 2017A030310662), Scientific and Technological Planning Project of Guangzhou, China (201707020034), and Special Fund for Outstanding Young Teachers of Guangdong Ocean University (HDYQ2015007 and HDYQ2017004).

语种：英文

外文关键词：Pennisetum alopecuroides (L.) Spreng.; Rhizosphere; Atrazine; Diffusive gradients in thin film (DGT); Phytoremediation

外文摘要：Atrazine (2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine) is a worldwide-used herbicide and often detected in agricultural soils and groundwater at concentrations above the permitted limit, because of its high mobility, persistence, and massive application. This study applied pot experiments to investigate the atrazine contents and speciation during the phytoremediation process by Pennisetum alopecuroides (L.) Spreng. in laterite soils. From the change of the total atrazine and bioavailable atrazine measured by diffusive gradients in thin film (DGT), P. alopecuroides significantly improved atrazine degradation efficiency from 15.22 to 51.46%, attributing to the increasing bioavailable atrazine in rhizosphere. Only a small amount of atrazine was taken up by P. alopecuroides root and the acropetal translocation from roots to shoots was limited. The atrazine speciation was significantly different between rhizosphere and non-rhizosphere, attributing to the declining pH and organic matters in rhizosphere. The relationship between pH and soil-bound/humus-fixed atrazine illustrated the pH-dependant release of the atrazine from soils and the competition between humus adsorption and uptake by P. alopecuroides. The present study reveals the important roles of soil pH and organic matters in atrazine speciation and availability in laterite soils, and provides new insights in the rhizospheric effects on effective phytoremediation of atrazine.