文献类型：期刊文献

英文题名：Changes in atrazine speciation and the degradation pathway in red soil during the vermiremediation process

作者：Lin, Zhong[1];Zhen, Zhen[2];Liang, Yanqiu[1];Li, Jin[1];Yang, Jiewen[1];Zhong, Laiyuan[1];Zhao, Lirong[1];Li, Yongtao[3];Luo, Chunling[3];Ren, Lei[2];Zhang, Dayi[4]

机构：[1]Guangdong Ocean Univ, Fac Chem & Environm Sci, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Agr Coll, Zhanjiang 524088, Peoples R China;[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

年份：2019

卷号：364

起止页码：710

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：SCI-EXPANDED(收录号：WOS:000452926500075)、、EI(收录号：20184506049916)、Scopus(收录号：2-s2.0-85053788602)、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：Atrazine; Earthworm; Availability; Metabolic pathway

外文摘要：Atrazine (2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine) is a triazine herbicide intensively used in agricultural production and is often detected in different environmental matrices at concentrations above the permitted limit. This study investigated the influence of two earthworm species (epigeic Eisenia foetida and endogeic Amynthas robustus) on atrazine speciation and the degradation pathway. Our results revealed that both earthworms significantly accelerated atrazine degradation in a 28-day vermiremediation, and the residual atrazine declined from 4.23 +/- 0.21 mg/kg in bulk soils to 0.51 +/- 0.29 mg/kg (E. foetida) and 0.43 +/- 0.19 mg/kg (A. robustus). By consuming organic matter (from 40.37 +/- 1.14 to 36.31 +/- 1.55 and 34.59 +/- 1.13 g/kg for E. foetida and A. robustus) and neutralizing the soil pH (from 5.37 +/- 0.27 to 6.36 +/- 0.11 and 6.61 +/- 0.30 for E. foetida and A. robustus), both earthworms reduced humus-fixed atrazine and increased the available atrazine. The percentage of available atrazine increased from 8.80 +/- 0.21% in bulk soil to 10.30 +/- 0.29% and 16.42 +/- 0.18% in the vermiremediation treatments. Both earthworms promoted the hydroxyatrazine pathway by consuming soil organic matter and encouraged the deethylatrazine/deisopropy-latrazine pathway by neutralizing the soil pH. Our findings unravel a new mechanism of vermiremediation by improving the soil physical-chemical properties and altering the atrazine degradation pathway, providing new insights into the influential factors on atrazine bioremediation in red soil.