| 铁屑修复地浸采铀地下水中硝酸盐污染的研究 |
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| 引用本文： | 康海彦,金朝晖,修宗明,王丹,李铁龙,叶善东. 铁屑修复地浸采铀地下水中硝酸盐污染的研究[J]. 农业环境科学学报, 2006, 25(Z1): 198-200 |
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| 作者姓名： | 康海彦 金朝晖 修宗明 王丹 李铁龙 叶善东 |
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| 作者单位： | 1. 南开大学环境科学与工程学院,天津,300071
2. 中核新疆天山铀业公司737厂,新疆,835000 |
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| 摘 要： | 以废铁屑为原料,对地浸采铀地下水中的硝酸盐氮污染进行修复实验,研究了溶液pH、地下水中主要共存离子以及不同柱填料对NO-3-N去除率的影响,同时结合粉煤灰预处理技术,对实验条件下铁屑去除硝酸盐的污染进行了探讨。结果表明:铁屑可有效去除地下水中的NO-3-N,其去除率随pH的降低而逐渐升高;溶液中共存的Ca2 、Mg2 对NO-3-N的去除影响不大,而SO42-、HCO-3的存在可明显降低NO-3-N去除效果;实验室条件下,单独采用铁屑去除地浸采铀地下水中的NO-3-N,反应5h去除率为93%,经粉煤灰预处理后,反应4h,NO3--N去除率可达到98.6%。
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| 关 键 词： | 地浸采铀地下水 铁屑 硝酸盐 粉煤灰 |
| 文章编号： | 1672-2043(2006)增刊-0198-03 |
| 修稿时间： | 2005-12-29 |
Reduction of Nitrate from in-situ Uranium Leaching Groundwater with Iron |
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| KANG Hai-yan,JIN Zhao-hui,XIU Zong-ming,WANG Dan,LI Tie-long,YE Shan-dong. Reduction of Nitrate from in-situ Uranium Leaching Groundwater with Iron[J]. Journal of Agro-Environment Science( J. Agro-Environ. Sci.), 2006, 25(Z1): 198-200 |
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| Authors: | KANG Hai-yan JIN Zhao-hui XIU Zong-ming WANG Dan LI Tie-long YE Shan-dong |
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| Abstract: | Nitrate remediation from in-situ uranium leaching groundwater was investigated with waste scrap iron.The influence of pH,main ions coexisted in groundwater and different column fillings on nitrate removal were studied.The removal efficiency of iron under batch condition combined with pretreatment technology of flying ash was discussed.The results indicated that nitrate could be removed by iron effectively,and the removal rates increased with decreasing pH.Coexisted irons of Ca2 ?Mg2 showed little effect on removal rate,but the existence of SO2-4?HCO-3 blocked nitrate removal.Under laboratory condition,removal rate of nitrate from in-situ uranium leaching groundwater was 93% in 5 h by iron only.With the pretreatment of flying ash,removal rate reached 98% in 4 h. |
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| Keywords: | in-situ leaching uranium groundwater scrap iron nitrate flying ash |
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