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以城市污水为水源和肥源对荒漠化土壤的修复效果

高中秋 任勇翔 陈灿灿 杨垒 肖松丽 曹亚峰

高中秋, 任勇翔, 陈灿灿, 杨垒, 肖松丽, 曹亚峰. 以城市污水为水源和肥源对荒漠化土壤的修复效果[J]. 环境科学研究, 2016, 29(4): 594-601.
引用本文: 高中秋, 任勇翔, 陈灿灿, 杨垒, 肖松丽, 曹亚峰. 以城市污水为水源和肥源对荒漠化土壤的修复效果[J]. 环境科学研究, 2016, 29(4): 594-601.
GAO Zhongqiu, REN Yongxiang, CHEN Cancan, YANG Lei, XIAO Songli, CAO Yafeng. Restoration of Desertification Soil Using Municipal Wastewater as Water and Fertilizer Source[J]. Research of Environmental Sciences, 2016, 29(4): 594-601.
Citation: GAO Zhongqiu, REN Yongxiang, CHEN Cancan, YANG Lei, XIAO Songli, CAO Yafeng. Restoration of Desertification Soil Using Municipal Wastewater as Water and Fertilizer Source[J]. Research of Environmental Sciences, 2016, 29(4): 594-601.

以城市污水为水源和肥源对荒漠化土壤的修复效果

基金项目: 陕西省科技统筹创新工程计划项目(2015KTZDSF01-06);高等学校博士学科点专项科研基金(20126120110017)

Restoration of Desertification Soil Using Municipal Wastewater as Water and Fertilizer Source

  • 摘要: 为了同步实现城市污水净化和荒漠化土壤修复,以荒漠化土壤(沙土)作为人工湿地基质(基质深度分别为0.1和0.6 m),分析不同运行条件(植物种类、水力负荷、基质深度、季节变化等)下湿地对净化城市污水、修复荒漠化土壤的效果. 结果表明:经过2 a的修复,城市污水中污染物作为荒漠化修复的肥源可以快速富集到荒漠化土壤中. 与原沙相比,沙土中w(有机质)、w(TN)、w(碱解氮)、w(TP)、w(速效磷)及电导率均极显著增加(P<0.01),而pH并无显著变化(P>0.05). 沙土容重极显著降低(P<0.01),孔隙率极显著增大(P<0.01). 当城市污水作为荒漠化土壤修复水源时,即使水力负荷低至0.0075 m3/(m2·d),植物仍能正常生长. 基质深度为0.1 m的潜流湿地在不同水力负荷时对污水中CODCr、TN、TP的最低平均去除率分别为59.46%、77.45%、62.36%;基质深度为0.6 m的潜流湿地对污水中三者的平均去除率分别为59.24%、32.02%、57.89%;基质深度为0.6 m的表面流湿地对污水中三者的平均去除率则分别为80.40%、14.00%、29.31%. 研究显示,以城市污水为水源和肥源对荒漠化土壤修复2 a后,沙土中养分含量均显著增加,沙土结构也得到明显改善,各湿地在夏秋季对污水中CODCr、TN、TP均有较好的去除效果.

     

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出版历程
  • 收稿日期:  2015-11-19
  • 修回日期:  2016-01-10
  • 刊出日期:  2016-04-25

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