丁铵黑药在水稻土中的降解及其影响因素研究  

Degradation and influence factors of ammonium butyl aerofloat in paddy soil

作　　者：郝艳[1] 吴小莲[1] 莫测辉[1] 李彦文[1] 屈相龙[1] 向垒[1] 黄献培[1] 陈键准[1] 黄韵怡[1] 

机构地区：[1]暨南大学环境工程系,广东省高校水土环境毒害性污染物防治与生物修复重点实验室,广州510632

出　　处：《环境科学学报》2012年第6期1454-1458,共5页Acta Scientiae Circumstantiae

基　　金：教育部博士点基金(No.200805590005);国家自然科学基金项目(No.41071211;41173101);广东省自然科学基金重点项目(No.2011020003196);广东省科技计划项目(No.2010B020311006);暨南大学本科生科技创新工程项目(No.CX11025;CX11021)~~

摘　　要：通过室内模拟实验,探讨了水稻土中丁铵黑药的降解规律及影响因素.结果表明,水稻土中丁铵黑药的降解率随着初始浓度的增大而降低,其半衰期均小于4d.丁铵黑药的降解率在一定范围内随着土壤含水量和温度的升高而显著提高,当含水量为60%、温度为25℃时,培养7d内丁铵黑药的最高降解率达84%.水稻土中丁铵黑药的降解机制主要是微生物的降解作用(约占80%),其次是光降解作用(约占20%).Degradation and influence factors of ammonium butyl aerofloat in paddy soil were investigated by indoor simulation test. The results showed that degradation rates of ammonium butyl aerofloat in paddy soil decreased with increasing initial concentrations, with their half-life periods all shorter than 4 days. Degradation rate of ammonium butyl aerofloat in paddy soil improved significantly with increasing soil moisture. Maximum degradation rate （84%） was obtained on the 7^th day under the conditions of 60% moisture and 25 ℃ temperature. The main degradation mechanism of ammonium butyl aerofloat in paddy soil was microbial degradation （ approximately 80% ） and photo - degradation （ approximately 20% ）.

关 键 词：水稻土 丁铵黑药 降解 动力学 机制 

分 类 号：X53[环境科学与工程—环境工程]