扬州大学学报（农业与生命科学版）2025，Vol.46Issue(2)：117-125,9.DOI:10.16872/j.cnki.1671-4652.2025.02.015
2种典型稻田土壤中老化微塑料对铬的吸附特性研究
Adsorption characterization of Cr on aged microplastics in two typical paddy soils
摘要
Abstract
To investigate the adsorption characteristics of chromium(Cr)by aged polyethylene(PE)and polyvinyl chloride(PVC)microplastics in typical paddy soils of East China area,this study systematically analyzed the adsorption behavior of Cr by virgin and acid-aged microplastics in yellow and red soils.Characterization analysis using scanning elec-tron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR),X-ray photoelectron spectroscopy(XPS),and Brunauer-Emmett-Teller(BET)revealed that the aging process significantly increased surface roughness,specific surface area,and oxygen-containing functional group content of microplastics.Adsorption kinetics and isotherm results indicated that both virgin and aged microplastics adsorbed Cr primarily through multilayer chemisorption,with adsorption capacity increasing significantly with microplastic dose.The adsorption characterization of aged microplastics varied in different soil types.In yellow soil,aging process enhanced Cr adsorption by both PE and PVC.By contrast,aging process im-proved PVC adsorption capacity but reduced PE adsorption capacity for Cr in red soil.This study demonstrated that Cr adsorption by aged microplastics depended on soil types,microplastic types and dose,providing critical scientific insights into the interaction mechanisms between microplastics and Cr in agricultural soils.关键词
土壤/微塑料/老化作用/铬/吸附动力学/吸附等温线Key words
soil/microplastics/aging effects/chromium/adsorption kinetics/adsorption isotherms分类
农业科学引用本文复制引用
徐一鸣,姚宇,尹微琴,王小治,许美玲..2种典型稻田土壤中老化微塑料对铬的吸附特性研究[J].扬州大学学报（农业与生命科学版）,2025,46(2):117-125,9.基金项目
国家自然科学基金资助项目(42207014) （42207014）
扬州市"绿扬金凤计划"项目(YZLYJFJH2022YXBS133) （YZLYJFJH2022YXBS133）
江苏省"双创博士"项目(JSSCBS20221349) （JSSCBS20221349）
