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土壤原位覆盖对底泥的修复作用研究

Keywords: 底泥,当地土壤,原位覆盖,氧化还原电位,溶解氧,苦草

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Abstract:

在高度厌氧底泥和富营养化水体构成的模拟生态系统中,采用土壤和硅藻土进行原位覆盖,研究了覆盖技术对水-沉积物界面微环境的改善作用和不同覆盖材料对苦草生长的影响。这2种底质覆盖后,表层底泥氧化还原电位(Eh)分别提高了48.37%和46.77%,底层水体的溶解氧消耗降低,水体中的总氮(TN)和总磷(TP)含量降低;与对照箱体的苦草死亡相比,经过土壤和硅藻土覆盖的箱体中苦草正常萌发、定植和生长;硅藻土箱体苦草的生物量、叶绿素和根茎比均高于土壤覆盖箱体。因此,原位覆盖能有效改善底层水体和表层底泥的氧化还原环境,隔

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