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磷酸钙对铀矿下游水系沉积物中铀的钝化效果

彭燕 陈迪云 陈南 曾林威

彭燕, 陈迪云, 陈南, 曾林威. 磷酸钙对铀矿下游水系沉积物中铀的钝化效果[J]. 环境工程, 2021, 39(4): 13-19,24. doi: 10.13205/j.hjgc.202104003
引用本文: 彭燕, 陈迪云, 陈南, 曾林威. 磷酸钙对铀矿下游水系沉积物中铀的钝化效果[J]. 环境工程, 2021, 39(4): 13-19,24. doi: 10.13205/j.hjgc.202104003
PENG Yan, CHEN Di-yun, CHEN Nan, ZENG Lin-wei. PASSIVATION EFFECT OF CALCIUM PHOSPHATE ON URANIUM IN SEDIMENTS IN DOWNSTREAM WATERS OF A URANIUM MINE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(4): 13-19,24. doi: 10.13205/j.hjgc.202104003
Citation: PENG Yan, CHEN Di-yun, CHEN Nan, ZENG Lin-wei. PASSIVATION EFFECT OF CALCIUM PHOSPHATE ON URANIUM IN SEDIMENTS IN DOWNSTREAM WATERS OF A URANIUM MINE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(4): 13-19,24. doi: 10.13205/j.hjgc.202104003

磷酸钙对铀矿下游水系沉积物中铀的钝化效果

doi: 10.13205/j.hjgc.202104003
基金项目: 

广州市市属高校科研项目(1201620219);国家自然科学基金(U1501231,41877290)。

详细信息
    作者简介:

    彭燕(1976-),女,博士,副教授,主要研究方向为放射性污染与防治,挥发性有机物污染与控制。pegnyann@gzhu.edu.cn

PASSIVATION EFFECT OF CALCIUM PHOSPHATE ON URANIUM IN SEDIMENTS IN DOWNSTREAM WATERS OF A URANIUM MINE

  • 摘要: 利用Ca3(PO42对模拟铀污染土壤进行钝化处理,分析了Ca3(PO42投加量对其中有效态铀的钝化效果,基于此,采集粤北某铀矿下游水系沉积物,利用逐级化学提取法开展了Ca3(PO42固定前后铀赋存形态研究。结果表明:沉积物中铀主要赋存于铁锰氧化物结合态中,添加Ca3(PO42可降低沉积物中有效态铀的含量。溪流沉积物、池塘底泥、水稻田土壤中可交换态铀含量分别平均下降58.27%、58.04%、52.62%;碳酸盐结合态铀含量分别平均下降33.58%、47.98%、32.58%。Ca3(PO42的投加显著增加了活性较低形态以及活性最低的残渣态铀含量;溪流沉积物、池塘底泥、水稻田土壤中有机质结合态铀含量分别增高32.95%、46.86%、30.50%;残渣态铀含量分别增高252.67%、61.90%、98.96%。钝化前,原处于中等风险的池塘底泥、水稻田土壤降为低风险,原处于低风险的溪流沉积物中有效态铀含量占比下降1/3。Ca3(PO42能有效降低沉积物中铀的危害,可为放射性核素污染治理和环境修复提供一定参考。
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  • 收稿日期:  2020-04-30
  • 网络出版日期:  2021-07-21

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