煤渣填土对土壤砷含量的影响及治理技术

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关键词：煤渣填土；砷污染；迁移转化；钝化固化；植物修复；治理技术中图分类号：X53 文献标识码：A 文章编号：1008-9500（2025）05-0047-04DOI： 10.3969/j.issn.1008-9500.2025.05.011

Abstract： Studyingtheeffectofcoalslagfilingonsoilarseniccontentisof greatsignificance forpreventingandcontroling soil heavy metal polution.Throughsystematic sampling andanalysis ofthecoal slagfiling area，it wasfound thatthecoal sla fillingsignificantlyincreasedthearseniccontentinthesoil，anditsmgrationandtransformationcharacteristicsshowed adecreasingverticaldirectionwithdepthandacirculardistributioninthehorizontaldirection.Basedonexperimentaldata andfieldinvestigations，acombnedtreatmenttechnologysystemisproposed，mainlyconsistingofpassvationsoidification andsupplementedbyplant restoration.Theresearchresults indicate thattheuseof amendments for in-situpassivationand solidificationcanefectivelyreducethebioavailabilityofarsenic，andtheplantingofarsenictolerantplantscanfurtherenhance the remediationefect，providing technical supportforthe treatmentofsoilarsenic pollution incoalslagfilling areas.

Keywords：coal slag filing;arsenic pollution; migration and transformation; passivation and solidification; phytoremediation; treatment technology

1煤渣中砷的迁移转化机制

随着我国工业化进程的加快，煤炭消耗量持续增长，由此产生的煤渣处置问题日益突出。（剩余3731字）