无机和有机组分在水稻土吸附菲过程中的特征和贡献差异  

Differences in the Characteristics and Contributions of Inorganic and Organic Components in the Adsorption of Phenanthrene in Paddy Soil

作　　者：汪青 徐若曦 李俊 WANG Qing;XU Ruo-xi;LI Jun(School of Geography and Tourism,Anhui Normal University,Wuhu 241003,China;Anhui Key Laboratory of Surface Processes and Regional Response in Jianghuai Basin,Wuhu 241003,China)

机构地区：[1]安徽师范大学地理与旅游学院,安徽芜湖241003 [2]江淮流域地表过程与区域响应安徽省重点实验室,安徽芜湖241003

出　　处：《安徽师范大学学报(自然科学版)》2025年第1期42-50,共9页Journal of Anhui Normal University(Natural Science)

基　　金：安徽省自然科学基金项目(2008085MD106).

摘　　要：在分析水稻土无机组分和有机组分对有机污染物菲的吸附/解吸动力学、等温线、解吸滞后、综合吸附能力等特征及差异的基础上,结合质量平衡计算,讨论无机和有机组分在水稻土吸附菲中的作用。结果表明:(1)去除有机质的水稻土对菲的吸附速率、平衡吸附量、饱和吸附量、分配系数等特征和指标与原土无显著差异。(2)无机组分(石英、蒙脱石)对菲吸附速率和吸附量均低于有机组分(胡敏素、富里酸、胡敏酸),但是较有机组分更接近全土,表明无机组分在实际土壤吸附菲过程中具有重要作用。(3)质量平衡计算的结果证实了无机组分在水稻土吸附菲过程中的主导作用,灼烧残留土壤矿物组分吸附量占全土之比达到90.6%,蒙脱石和石英吸附量占比分别为5.0%和22.1%,而胡敏素、富里酸、胡敏酸的吸附量占比为12.6%、6.0%和0.4%。因此,在讨论土壤吸附有机污染物的容量或者机理时,要综合考虑无机矿物组分和有机组分的作用。This study aimed to discuss the role of inorganic and organic components in phenanthrene adsorption in paddy soil based on the different characteristics of phenanthrene adsorption/desorption kinetics,isotherm,desorption hysteresis,comprehensive adsorption capacity between the inorganic components and organic components of paddy soil.The results showed that(1)Paddy soil with organic matter removed were not significantly different from the original soil in terms of adsorption characteristics of phenanthrene such as adsorption rate,equilibrium adsorption capacity,saturated adsorption capacity,and partition coefficient.(2)The adsorption rate and adsorption capacity of inorganic components(quartz,montmorillonite)were lower than those of organic components(humin,fulvic acid,humic acid),but they were closer to the whole soil than the organic components,which indicated the important role of inorganic components in the process of soil adsorption of phenanthrene.(3)The dominant role of inorganic components was also confirmed by the results of the mass balance calculation.The adsorption capacity of ignited soil accounted for 90.6%of the whole soil,and montmorillonite and quartz accounted for 5.0%and 22.1%,respectively.While the adsorption capacity of humin,fulvic acid and humic acid accounted for 12.6%,6.0%and 0.4%,respectively.Therefore,when discussing the capacity or mechanism of soil adsorption of organic pollutants,the roles of inorganic mineral components and organic components should be comprehensively considered.

关 键 词：多环芳烃 无机组分 矿物 腐殖质 吸附 

分 类 号：X53[环境科学与工程—环境工程]