重庆大学学报2024，Vol.47Issue(4)：12-21,156,11.DOI:10.11835/j.issn.1000-582X.2023.261
微塑料对土壤磷吸附的影响
Effect of microplastics on soil phosphorus adsorption
摘要
Abstract
Microplastics are emerging pollutants widely present in soil,and their effects on soil phosphorus(P)adsorption are still unclear.This paper examined the effects of 0.1%to 10%microplastics on soil P adsorption and the underlying mechanisms.The results showed that microplastics could significantly increase the rate of liquid film diffusion stage in the first stage of the adsorption process(p<0.05).Compared with the pure soil(qe= 6.456 mg/g),the soil P adsorption capacity was significantly reduced by microplastics with less than 1%concentration(p<0.05).However,the soil P adsorption capacity was significantly increased by microplastic with concentrations higher than 5%(p<0.05).Additionally,the smaller the particle size of microplastics,the greater the P adsorption capacity of soil with the same microplastic concentration.Microplastics could compete with P for adsorption sites,which reduced the adsorption of P in the microplastic-soil system.However,microplastics could also directly adsorb P,leading to an increase in the P adsorption capacity of microplastic-soil system when microplastic concentration were more than 5%.Therefore,microplastics pollution in soil could significantly change P adsorption characteristics,which closely related to the microplastics concentration and particle size.关键词
微塑料/土壤/磷/吸附Key words
microplastics/soil/phosphorus/adsorption分类
环境科学引用本文复制引用
唐子超,唐晋,梁伦套,黎彦均,蒋艳雪,方芳,郭劲松..微塑料对土壤磷吸附的影响[J].重庆大学学报,2024,47(4):12-21,156,11.基金项目
国家自然科学基金资助项目(32001195) （32001195）
国家重点研发计划资助项目(2019YFD1100501).Supported by National Natural Science Foundation of China(32001195),and the National Key Research and Development Program of China(2019YFD1100501). （2019YFD1100501）
