【作者】 沈尧鑫； 姜博； 邢奕； 王洋； 杜昱樊； 张文俊； 王鑫； 徐国韬；

【Author】 Shen Yaoxin;Jiang Bo;Xing Yi;Wang Yang;Du Yufan;Zhang Wenjun;Wang Xin;Xu Guotao;School of Energy and Environmental Engineering,University of Science & Technology Beijing;Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants,University of Science & Technology Beijing;National Engineering Laboratory for Site Remediation Technologies;Technical Center,China State Construction Engineering Corporation Limited;

【机构】 北京科技大学能源与环境工程学院； 工业典型污染物资源化处理北京市重点实验室； 污染场地安全修复技术国家工程实验室； 中国建筑股份有限公司技术中心；

【摘要】 由于抗生素的广泛应用且易被土壤颗粒吸附,导致其在环境中检出率较高,其积累效应对土壤生态环境存在潜在风险。探究了3种环境中检出率高的抗生素在5种不同理化性质的土壤上的吸附-解吸行为。结果表明:Freundlich模型对3种抗生素的吸附和解吸过程都有较好的拟合;二级动力学方程能较好的描述土壤吸附抗生素的动力学过程,3种抗生素在土壤上的吸附均以物理吸附为主。红霉素的吸附与土壤pH值显著相关(P<0.05),磺胺嘧啶的吸附与土壤中的全氮有较强相关性,而四环素在土壤中的吸附与土壤理化性质无相关性显著,表明抗生素在土壤中的吸附行为与抗生素类型相关。3种抗生素在土壤上的解吸存在明显的滞后现象,四环素、磺胺嘧啶、红霉素的解吸百分比分别为0.27%～12.48%,0.99%～34.08%,0.07%～6.45%,滞后指数分别为0.0040～0.1430,0.0100～0.5170,0.0006～0.0690。为抗生素在土壤中的迁移转化提供了新思路,从而为评价抗生素对农业生产及环境影响提供参考。更多还原

【Abstract】 Due to the widespread application of antibiotics and their persistence in soil particles,the detection rate of antibiotics is increasing. The accumulation of antibiotics has potential risks to soil ecological environment. This study investigated the adsorption-desorption behavior of three most frequently detected antibiotics in five soils collected from five different locations in China. The results showed that Freundlich model fitted well with the adsorption/desorption behavior of the three kinds of antibiotics on soil particles,which could be decipted by secondary dynamic equation. Antibiotics adsorption was dominated by physical adsorption. The adsorption of erythromycin was significantly correlated with soil p H( P < 0. 05). The total nitrogen in the soil may have a strong correlation with the adsorption of sulfadiazine. However,the adsorption of tetracycline in soil had no significant correlation with the physical and chemical properties of soil,indicating that the adsorption behavior of antibiotics in soil was related to the types of antibiotics. Desorption hysteresis phenomenon was observed in all the three antibiotics. The desorption percentage ranges of tetracycline,sulfadiazine,erythromycin were 0. 27% ～ 12. 48%,0. 99% ～ 34. 08%,0. 07% ～ 6. 45%,respectively,and the lagging index ranges were 0. 0040 ～ 0. 1430,0. 0100 ～ 0. 5170,0. 0006 ～ 0. 0690,respectively. This paper provides a new idea for the migration and transformation of antibiotics in soils,thus serving as a basis for the evaluation of the impact of antibiotics on agricultural production and environment.更多还原