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原位掩蔽对底泥汞释放的抑制效果及中试评估

沈佳佳 石艳洁 吴丰昌 卢少勇 廖海清 赵 鑫 王海龙

沈佳佳, 石艳洁, 吴丰昌, 卢少勇, 廖海清, 赵 鑫, 王海龙. 原位掩蔽对底泥汞释放的抑制效果及中试评估[J]. 环境科学研究, 2015, 28(8): 1281-1287.
引用本文: 沈佳佳, 石艳洁, 吴丰昌, 卢少勇, 廖海清, 赵 鑫, 王海龙. 原位掩蔽对底泥汞释放的抑制效果及中试评估[J]. 环境科学研究, 2015, 28(8): 1281-1287.
SHEN Jiajia, SHI Yanjie, WU Fengchang, LU Shaoyong, LIAO Haiqing, ZHAO Xin, WANG Hailong. Effects of Mercury Release Control by Sediment Capping and its Pilot Evaluation[J]. Research of Environmental Sciences, 2015, 28(8): 1281-1287.
Citation: SHEN Jiajia, SHI Yanjie, WU Fengchang, LU Shaoyong, LIAO Haiqing, ZHAO Xin, WANG Hailong. Effects of Mercury Release Control by Sediment Capping and its Pilot Evaluation[J]. Research of Environmental Sciences, 2015, 28(8): 1281-1287.

原位掩蔽对底泥汞释放的抑制效果及中试评估

基金项目: 国家水体污染控制与治理科技重大专项(2010ZX07212-007-01)

Effects of Mercury Release Control by Sediment Capping and its Pilot Evaluation

  • 摘要: 为解决贵州省百花湖底泥中的汞污染问题,研究了原位掩蔽对底泥中汞释放的抑制效果. 选择沸石、高岭土和赤铁矿为掩蔽材料,通过模拟试验,确定原位掩蔽的最佳覆盖厚度为2.0 cm,此时沸石、高岭土和赤铁矿对底泥汞释放的控制率分别为47.1%、64.9%和62.3%,说明最佳掩蔽材料为高岭土. 以高岭土为掩蔽材料的情况下,试验实施7 d后,水体扰动对控制率的影响不足6.7%. 中试区位于百花湖重度污染区,面积约为22 000 m2,采用驳船少量多次撒布高岭土原位掩蔽汞污染底泥,控制覆盖厚度为2.0~3.0 cm,按月连续监测6次. 结果显示,高岭土对汞污染底泥的控制率达到47.1%. 模拟试验及中试效果显示,高岭土原位掩蔽可有效抑制底泥中汞的释放,并且较薄的覆盖厚度可降低工程成本和对湖底生态系统的影响.

     

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  • 刊出日期:  2015-08-25

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