落叶中DOM和NDOM对紫色土中Cu迁移的影响  

Effects of DOM and NDOM in Defoliation on Copper Migration in Purple Soil

作　　者：陈星宇 李文斌 邓红艳 任丽平 梁倩 陈凌源 CHEN Xing-yu;LI Wen-bin;DENG Hong-yan;REN Li-ping;LIANG Qian;CHEN Ling-yuan(College of Environmental Science and Engineering,China West Normal University,Nanchong,Sichuan 637009,China)

机构地区：[1]西华师范大学环境科学与工程学院,四川南充637009

出　　处：《环境监测管理与技术》2022年第6期69-71,共3页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(41271244);四川省科技厅基金资助项目(2018JY0224);西华师范大学科研业务基金资助项目(18B023)。

摘　　要：以黄葛榕落叶中可溶性有机质(DOM)和不可溶性有机质(NDOM)为研究对象,分析用DOM、NDOM和DOM+NDOM改良碱性(Al-P)、中性(Ne-P)和酸性紫色土(Ac-P)后,土中Cu的形态变化。结果表明:随着老化时间的增加,各改良紫色土中离子交换态Cu含量均明显降低,碳酸盐结合态Cu含量基本保持不变,铁锰氧化物结合态和有机结合态Cu含量均逐渐增加。老化后,供试改良紫色土中Cu表现为有机结合态≈铁锰氧化物结合态>碳酸盐结合态>离子交换态的趋势,Cu迁移能力整体降低,降低幅度为44.22%~68.99%。In this paper,dissolved organic matter(DOM) and insoluble organic matter(NDOM)in defoliation(Ficus lacor) were selected as research objects,the changes of Cu morphology in alkaline(Al-P),neutral(Ne-P) and acidic purple soil(Ac-P) improved by DOM,NDOM and DOM+NDOM were analyzed.The results showed that with the increase of aging time in each improved purple soil,the content of ion-exchange Cu decreased significantly,the content of carbonate bound Cu remained unchanged,and the content of Cu in Fe-Mn oxides bound and organic bound increased gradually.After aging,Cu content in improved purple soil in various forms showed a trend of organic bound ≈ Fe-Mn oxides bound>carbonate bound>ion-exchanged state.The migration capacity of Cu decreased by 44.22%~68.99%.

关 键 词：可溶性有机质 不可溶性有机质 Cu迁移 紫色土 落叶 

分 类 号：X53[环境科学与工程—环境工程]