岩矿测试2025，Vol.44Issue(5)：1051-1068,18.DOI:10.15898/j.ykcs.202506190169
长江三角洲沉积物中抗生素的吸附特征及空间分布预测
Adsorption Characteristics and Spatial Distribution Prediction of Antibiotics in Sediments of the Yangtze River Delta
摘要
Abstract
The sorption behavior of sediments is a key process that regulates the transport and transformation of antibiotics in the ecological environment.Differences in the physicochemical properties of sediments in different regions will affect the adsorption behavior of antibiotics directly.An in-depth investigation of the action mechanism and the establishment of a corresponding adsorption prediction model are essential to improve the accuracy of environmental risk assessment.In order to predict the adsorption of antibiotics in the water-sediment system more accurately,estuarine-offshore sediments from different regions of the Yangtze River Delta were collected,the adsorption characteristics of tetracycline(TC)and ciprofloxacin(CIP)in the sediment were analyzed and a region-specific prediction model was constructed.The results showed that the kinetic adsorption process of TC and CIP on sediments conformed to the pseudo-second-order kinetic model,and the isothermal adsorption process conformed to the Freundlich isothermal adsorption model and linear model.Combined with the correlation analysis of physicochemical parameters and adsorption properties of sediments from different regions,a prediction model for the adsorption partition coefficient(Kd)of estuarine and marine sediments was established using partial least squares(PLS)regression,which had excellent prediction accuracy(cross-validation coefficient Q2＞0.85).The adsorption capacity of TC and CIP was significantly higher in sediments from the North Passage of the South Channel and the muddy area of the Yangtze River Estuary than those from the South Passage of the South Channel and the distant sea area of the Yangtze River Estuary.Additionally,the adsorption capacity of TC was higher than that of CIP in sediments from the same location.The predictive model effectively estimates the adsorption performance of the two antibiotics in different sediments of the Yangtze River Delta,providing a theoretical basis for assessing their contamination risk in estuarine and marine areas.The BRIEF REPORT is available for this paper at http://www.ykcs.ac.cn/en/article/doi/10.15898/j.ykcs.202506190169.关键词
四环素/环丙沙星/吸附特征/预测模型/沉积物/理化性质/长江三角洲Key words
tetracycline/ciprofloxacin/adsorption characteristics/prediction model/sediment/physicochemical properties/the Yangtze River Delta分类
化学引用本文复制引用
陈海英,申汝佳,黄海波,张飞,时磊,谢恩平,李华玲,石睿,沈小明..长江三角洲沉积物中抗生素的吸附特征及空间分布预测[J].岩矿测试,2025,44(5):1051-1068,18.基金项目
中国地质调查局地质调查项目(DD202307006003,DD20221756) （DD202307006003,DD20221756）
