蒙脱石驱动的半干旱荒漠化矿区藻结皮快速形成及机制  

Rapid establishment and mechanism exploration of algae crust based on montmorillonite in semi-arid mining area with desertification

作　　者：周克强 夏令[1] 宋少先[1] 易浩 吴丽[1] 彭永和 ZHOU Keqiang;XIA Ling;SONG Shaoxian;YI Hao;WU Li;PENG Yonghe(School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan,Hubei 430070,China;Rizhao Big Data Research Institute of Geology and Geographic Information,Rizhao,Shandong 276826,China)

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]日照地质地理信息大数据研究院,山东日照276826

出　　处：《中国矿业大学学报》2023年第3期607-614,共8页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(32061123009)。

摘　　要：半干旱区矿产资源的开发利用导致土地生态严重退化.自然状态下,退化地表能在数千年内形成生物结皮,恢复地表生态.为了短期内稳固表土,提出构建藻-黏土型人工结皮,即混合具鞘微鞘藻和蒙脱石制备匀浆,并接种至沙表而成.结果表明,最佳改良组(M500)盖度高达98.7%,厚度高达4.48 mm,叶绿素a含量提高至M0的4.8倍,叶绿素荧光参数Fv/Fm提升至0.21.因此,蒙脱石有效缩短了藻结皮的构建周期,提高了藻结皮的稳定性.该方法为退化地表修复提供了新型治理手段,对半干旱矿区荒漠化治理具有重要意义.The exploitation of mineral resources has severely degraded the ecosystem of the land in semi-arid regions.Within thousands of years in the natural state,biological crusts can grow on the damaged surface to restore the surface ecosystem.It is suggested to build an algal-clay artificial crust formed by combining Microcoleus steenstruppi and montmorillonite to prepare a homogenate and inoculate it on the sand surface in order to stabilize the surface soil quickly.The findings demonstrate that the best improved group(M500)has a cover as high as 98.7%,a thickness as high as 4.48mm,a chlorophyll a content that is increased to 4.8times that of M0,and an increase in Fv/Fmto 0.21.Therefore,montmorillonite significantly shortens the algal crust production cycle and increases the durability of algal crusts.The method provides a new treatment strategy for deteriorated surface repair and is extremely important in the man agement of desertification in semi-arid mining areas.

关 键 词：蒙脱石 具鞘微鞘藻 人工生物结皮 荒漠矿区治理 

分 类 号：X174.1[环境科学与工程—环境科学]