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醋渣和糠醛渣对赤泥中金属稳定性的影响

任杰 刘继东 陈娟 刘小莲 李发生 杜平

任杰, 刘继东, 陈娟, 刘小莲, 李发生, 杜平. 醋渣和糠醛渣对赤泥中金属稳定性的影响[J]. 环境科学研究, 2016, 29(12): 1895-1903.
引用本文: 任杰, 刘继东, 陈娟, 刘小莲, 李发生, 杜平. 醋渣和糠醛渣对赤泥中金属稳定性的影响[J]. 环境科学研究, 2016, 29(12): 1895-1903.
REN Jie, LIU Jidong, CHEN Juan, LIU Xiaolian, LI Fasheng, DU Ping. Effects of Vinegar and Furfural Residue on Metal Stability in Bauxite Residue[J]. Research of Environmental Sciences, 2016, 29(12): 1895-1903.
Citation: REN Jie, LIU Jidong, CHEN Juan, LIU Xiaolian, LI Fasheng, DU Ping. Effects of Vinegar and Furfural Residue on Metal Stability in Bauxite Residue[J]. Research of Environmental Sciences, 2016, 29(12): 1895-1903.

醋渣和糠醛渣对赤泥中金属稳定性的影响

基金项目: 国家环境保护公益性行业科研专项(201509048)

Effects of Vinegar and Furfural Residue on Metal Stability in Bauxite Residue

  • 摘要: 赤泥中和是实现堆场植被复垦的必要途径,而醋渣和糠醛渣是赤泥降碱和改良效果较好的2种生物质材料.针对赤泥碱性降低过程中理化性质的改变,根据MEP(多级提取程序)毒性溶出以及BCR形态分级试验,对醋渣和糠醛渣对赤泥中金属行为的影响进行了研究.结果表明:添加20%的醋渣和糠醛渣后,赤泥pH从10.60分别降至9.61和8.96,w(TOC)从8.04 g/kg分别增至35.11和38.62 g/kg,赤泥比表面积从10.18 m2/g分别降至7.36和8.57 m2/g,CEC(阳离子交换量)从106.28 cmol/kg分别增至127.19和161.59 cmol/kg;赤泥中Mo的最低浸出浓度为0.37 mg/L,超过GB/T 14848—1993《地下水质量标准》中Mo的Ⅲ类标准限值(0.1 mg/L);醋渣和糠醛渣可有效抑制赤泥中Al、V、Pb的浸出,但却可促进Cu、Mn、Ni和Mo的浸出,四者的最高浸出浓度分别可达64.45、17.64、12.09 μg/L和29.37 mg/L;醋渣和糠醛渣的添加可导致Al、V和Pb向稳定性较高的残渣态转化,Ni则向稳定性较低的酸可提取态转化.研究显示,糠醛渣比醋渣有更强的中和能力,对赤泥中金属稳定性影响较小.赤泥中金属元素具有潜在的长期浸出性且环境风险较高.

     

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出版历程
  • 收稿日期:  2016-05-10
  • 修回日期:  2016-09-05
  • 刊出日期:  2016-12-25

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