摘要
在实验室条件下,采用振荡平衡法研究磺胺间甲氧嘧啶(SMM)在土壤中的吸附行为,以及尿素、阴离子表面活性剂十二烷基苯磺酸钠(SDBS)、阳离子表面活性剂十六烷基三甲基溴化铵(CTMAB)和腐殖酸(HA)对吸附的影响。结果表明,SMM在土壤中的吸附分配系数Kd为18.9 mL.g-1,有机碳吸附常数KOC为466.2 mL.g-1,具有一定的移动性。50 mg.L-1尿素和阴离子表面活性剂SDBS可降低土壤对磺胺间甲氧嘧啶的吸附量,增大其在土壤中的移动性;500 mg.L-1尿素、阳离子表面活性剂CTMAB和腐殖酸(HA)也可增大SMM在土壤中的吸附。
Sulfamonomethoxine is a veterinary antibiotic drug, which can be absorbed by soil. The adsorption behav- ior of sulfamonomethoxine in soil and influence of nitrate, urea, anionic surfactant dodeeylbenzene sulfonate ( SD- BS), cationic surfaetant hexadecyltrimethyl-ammonium bromide (CTMAB) and humie acid (HA) on it were stud- ied. The results showed that: the distribution coefficient Ka of suffamonomethoxine in the soil was 18.9 mL· g^-1, or- ganic carbon distribution constant Koc was 466. 2 mL· g^-1 ; furthermore, sulfamonomethoxine possessed the mobility in the soil. 50 mL· g^-1 urea and anionic surfactant SDBS can decrease adsorption of sulfamonomethoxine in soil, in- creasing its mobility in soil. 500 mL· g^-1 urea, cationic surfaetant CTMAB and HA can increase adsorption of sulfa- monomethoxine in soil.
出处
《浙江农业学报》
CSCD
北大核心
2013年第1期130-134,共5页
Acta Agriculturae Zhejiangensis
基金
国家自然科学基金青年科学基金项目(21107023)
中国博士后科学基金资助项目(20110491001)
河南省基础与前言技术研究计划项目(092300410173)
河南省教育厅自然科学研究计划项目(2010B610007)
河南师范大学青年科学基金项目(2009qk11)
关键词
磺胺间甲氧嘧啶
土壤
吸附
环境物质
分配系数Kd
有机碳吸附常数KOC
sulfamonomethoxine
soil
adsorption
environmental substances
distribution coefficient Kd
organiccarbon distribution constant Koc