微塑料对普萘洛尔在针铁矿上吸附的影响  

Effect of microplastics on the adsorption of propranolol on goethite

作　　者：邓月华 王文姬 左鑫 贺艳 乔乐乐 荆秀艳[1] DENG Yuehua;WANG Wenji;ZUO Xin;HE Yan;QIAO Lele;JING Xiuyan(College of Geology and Environment,Xi’an University of Science and Technology,Xi’an,710054,China)

机构地区：[1]西安科技大学地质与环境学院,西安710054

出　　处：《环境化学》2022年第5期1718-1725,共8页Environmental Chemistry

基　　金：陕西省自然科学基金(2020JQ-740)资助.

摘　　要：本实验研究了微塑料对新兴污染物普萘洛尔在针铁矿上吸附行为的影响,探讨了针铁矿、微塑料及微塑料共存时针铁矿对普萘洛尔的吸附动力学、吸附等温线,考察了pH、腐殖酸浓度、离子强度对普萘洛尔吸附行为的影响。结果表明,普萘洛尔在3种吸附剂上的吸附动力学均符合伪二阶动力学模型,吸附等温线均符合Langmuir等温吸附模型。对比发现,普萘洛尔的吸附效率顺序为微塑料>微塑料+针铁矿>针铁矿。溶液pH值在2—6时,微塑料对普萘洛尔在针铁矿上吸附的影响较弱,当溶液pH值大于6时,微塑料能显著影响普萘洛尔在针铁矿上吸附。普萘洛尔在3种吸附剂上的吸附量随着腐殖酸浓度的增加而增加,且对普萘洛尔在针铁矿上吸附的促进作用最强。同时,Ca^(2+)的加入对普萘洛尔的吸附抑制较强。本文的研究结果可为全面认识微塑料共存时污染物在环境中的迁移行为提供基础数据。This study focused on investigating the influence of microplastics on the adsorption behavior of the emerging pollutant propranolol on goethite.The adsorption kinetics and isotherms of propranolol on goethite,microplastics,and their mixed adsorbents were studied respectively.Besides,the effects of pH,humic acid concentration,and ionic strength on the adsorption efficiency of propranolol were also investigated.Results indicated that the pseudo-second-order model and Langmuir isotherm model fitted the adsorption process well.Moreover,the adsorption efficiency order of propranolol follows microplastics>microplastics+goethite>goethite.Furthermore,compared with the pH range of 2—6,a pH higher than six was more helpful for the adsorption of propranolol on goethite by microplastics.In addition,the adsorption efficiency of propranolol in the above three adsorbents was all promoted with the addition of humic acid,and the goethite exhibited the best.Meanwhile,the adsorption efficiency of propranolol was hampered in the presence of cation,especially for the addition of Ca^(2+).This study provided basic data for a comprehensively understanding of the migration behavior of propranolol in the environment when microplastics coexist.

关 键 词：普萘洛尔 针铁矿 微塑料 吸附 界面作用 

分 类 号：X505[环境科学与工程—环境工程]