农业环境科学学报Issue(12)：2287-2294,8.DOI:10.11654/jaes.2015.12.006
环丙沙星在黑土及其组分中的吸附行为及铜和钙的影响
Soil Components and Cu2+and Ca2+Effects on Ciprofloxacin Adsorption by Black Soil
摘要
Abstract
Antibiotic contamination in the environment has drawn wide concerns. Its adsorption in soil may affect its fates in soil environ-ment. An experiment was performed to determine the effects of soil components(organic matter, iron oxides)and various environmental fac-tors(pH, Cu2+and Ca2+)on ciprofloxacin(CIP)adsorption onto a black soil(BS0)using batch adsorption experiment. Adsorption capacity of CIP was BS0 BS1(organic matter removal)≈BS2(organic matter and iron oxides removal). The maximum Kd value was 9008 L·kg-1, 5063 L·kg-1, and 4583 L·kg-1 for BS0, BS1, and BS2, respectively, indicating that soil organic matter was the main contributor to CIP reten-tion in soil, followed by soil clay minerals. The main adsorption mechanisms of CIP by BS0 were complexation with soil organic matters and cation exchange with clay minerals. Low pH favored CIP adsorption. Divalent cation Cu2+showed different effects on CIP adsorption, de-pending on pH:at pH≤6 it slightly depressed CIP adsorption on BS1 and BS2 because of the competition; while at pH﹥6 it significantly promoted the adsorption. Compared with Cu2+, Ca2+suppressed CIP adsorption at the tested pH range by acting as a competiting cation. On the other hand, CIP could promote Cu2+adsorption under acidic condition, which might be a result of forming a "soil- CIP- Cu" ternary surface complex.关键词
环丙沙星/铜/钙/土壤/吸附Key words
ciprofloxacin/Cu/Ca/soil/adsorption分类
资源环境引用本文复制引用
谭印月,徐坚,顾雪元,王晓蓉,童非,谢锦宇,姜洋..环丙沙星在黑土及其组分中的吸附行为及铜和钙的影响[J].农业环境科学学报,2015,(12):2287-2294,8.基金项目
国家自然科学基金 （）
