生态环境学报2023，Vol.32Issue(11)：2072-2082,11.DOI:10.16258/j.cnki.1674-5906.2023.11.017
土壤中抗生素的吸附行为与机理研究进展
Research Progress on Adsorption Behavior and Mechanism of Antibiotics in Soil
摘要
Abstract
Antibiotics introduced into the soil undergo various environmental processes,leading to environmental pollution.This paper summarizes the source,pollution status,and environmental behavior of antibiotics in soil.It systematically outlines the functional groups and molecular structure of antibiotics,along with the fundamental principles and mechanisms that influence adsorption in soil,such as soil type,pH,coexisting ions,and organic matter.Antibiotics in soil primarily originate from animal husbandry and medical waste,with tetracyclines,sulfonamides,macrolides and quinolones being the main types.These antibiotics persist in the soil through processes such as bioaccumulation and adsorption,which can lead to the emergence of resistance genes or cross-contamination with other pollutants,posing ecological risks.Antibiotics containing ionizable groups,such as hydroxyl,carboxyl and amino groups,as well as diverse molecular structures,exhibit different acid dissociation constants.They are adsorbed by the soil through mechanisms such as H bond,π-π interaction,metal ion complexation,deprotonation and cation exchange.Soils with fine particles,fine texture,and larger specific surface area and pore volumes provide more adsorption sites,making it easier for antibiotics to be adsorbed.Soil charge also plays a crucial role;when the valence state of the soil charge matches that of antibiotics,it inhibits adsorption,while the opposite promotes it.Organic matter enhances antibiotic adsorption by competing for adsorption sites through functional groups such as hydroxyl and carboxyl.Acidic metal ions like Al3+ and Fe3+ act as a bridge and promote antibiotic adsorption,whereas alkaline metal ions(K+,Na+,Ca2+ and Mg2+)compete for sites and inhibit adsorption.In addition,microorganisms in the soil that produce extracellular enzymes such as β-lactamases and aminoglycoside hydrolases can decompose antibiotics.Plant roots can secrete organic acids and sugars to interact with antibiotics.Future efforts may focus on using humus soil with high organic matter and ion content can be used to develop contaminated soil amendments for in-situ remediation of contaminated soil,or making use of minerals to develop efficient and cost-effective adsorption materials.It is also recommended to conduct more research on multiple compound pollution systems and develop multi-mechanism prediction models.关键词
抗生素/土壤/吸附/影响因素/作用机制/抗生素治理Key words
antibiotics/soil/adsorption/influencing factor/action mechanism/antibiotic treatment分类
资源环境引用本文复制引用
周永康,余圣品,李佳乐,董一慧,王萌,赵齐灵,李烨余..土壤中抗生素的吸附行为与机理研究进展[J].生态环境学报,2023,32(11):2072-2082,11.基金项目
国家自然科学基金国际(地区)合作研究项目(51861145308) （地区）
江西省教育厅科学技术研究项目(GJJ2200720) （GJJ2200720）
南昌市水文地质与优质地下水资源开发利用重点实验室开放课题(20231B21 （）
20231C21) （）
东华理工大学实验技术开发项目(DHSY-202263 （）
DHSY-202222) （）
