聚酰胺6微塑料对土壤吸附磺胺甲恶唑的影响  

EFFECT OF POLYAMIDE 6 ON THE ADSORPTION OF SULFAMETHOXAZOLE IN SOIL

作　　者：江长松 彭艳芳 罗翠莲 周琪 黄亮亮[1] 邹小明[2] JIANG Zhang-song;PENG Yan-fang;LUO Cui-lian;ZHOU Qi;HUANG Liang-liang;ZOU Xiao-ming(College of Environmental Science and Engineering,Guilin University of Technology,Guilin,Guangxi 541004,China;School of Life Sciences,Jinggangshan University,Ji’an,Jiangxi 343009,China)

机构地区：[1]桂林理工大学环境科学与工程学院,广西桂林541004 [2]井冈山大学生命科学学院,江西吉安343009

出　　处：《井冈山大学学报（自然科学版）》2022年第4期37-43,共7页Journal of Jinggangshan University (Natural Science)

基　　金：国家自然科学基金项目(32160303,31760165);江西省杰出青年人才资助计划项目(20192BCBL23014);江西省红壤丘陵区农业环境污染防控重点实验室开放基金项目(JXKL2021001);长江水环境教育部重点实验室开放基金项目(YRWEF201907)。

摘　　要：微塑料(MPs)和磺胺类抗生素(SAs)在农田土壤中普遍共存,且MPs和土壤均可吸附SAs,但不清楚MPs如何影响土壤对SAs的吸附。为此,本研究选择南方红壤区农田土壤探究了聚酰胺6微塑料(PA6)对土壤吸附磺胺甲恶唑(SMZ)特性的影响。结果表明,土壤和土壤+PA6对SMZ的吸附在24 h内达到平衡,动力学能用双常数方程较好地拟合(R^(2)≥0.968),Freundlich模型能很好地描述吸附等温线(R^(2)≥0.998);土壤吸附SMZ受土壤pH和腐植酸(HA)浓度的影响,碱性土壤和低HA浓度土壤有利于SMZ的迁移;PA6对土壤吸附SMZ有显著影响,表现为土壤中PA6含量占比越高其促进作用越大,且不受老化过程影响。本研究能为评估MPs和SAs的土壤生态风险提供科学依据。Microplastics(MPs)and sulfonamide antibiotics(SAs)generally coexist in farmland soil,and they can adsorb SAs.However,the influence of MPs upon the adsorption of SAs by soil is still unclear.Therefore,in this study,farmland soil in southern red soil area was chosen to investigate the influence of polyamide 6(PA6)upon the adsorption characteristics of sulfamethoxazole(SMZ)in soil.The results showed that the adsorption of SMZ by soil and soil+PA6 reached equilibrium within 24 h.The kinetics can be well fitted by the double constant equation(R^(2)≥0.968),and the Freundlich model can describe the adsorption isotherm very well(R^(2)≥0.998).Moreover,the adsorption behavior of soil for SMZ was affected by the pH values and the Humic acid(HA)concentrations in soil,and alkaline soil and low HA soil are conducive to the migration of SMZ.Furthermore,PA6 has a significant effect on the adsorption of SMZ by soil,which is manifested as the higher the proportion of PA6 in the soil,the greater its promotion effect,and it is not affected by the aging process.This study can providea scientific basis for evaluating the environmental risk of MPs and SAs in soil.

关 键 词：微塑料 聚酰胺6 土壤 磺胺甲恶唑 吸附 

分 类 号：X53[环境科学与工程—环境工程]