The process of organic acid chemical leaching of radionuclide thorium polluted soil
JIANG Wen-bo1, GAO Bai1, SHEN Wei2, ZHANG Hai-yang1, WANG Juan1, YI Ling1, YANG Bing3, LIAN Guo-xi3
1. State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China; 2. South Central Jiangxi Institute of Geological and Mineral Exploration, Nanchang 330029, China; 3. The Fourth Research and Design Engineering Corporation of CNNC, Shijiazhuang 050021, China
Abstract：Oxalic acid, citric acid and tartaric acid were selected to study the leaching effect on typical radioactive thorium contaminated soil with different particle sizes. The changes of fluidity and stability of leaching solution after leaching were analyzed in terms of soil extractable forms, and the soil remediation mechanism and the destruction degree of soil crystalline phase were characterized with leaching kinetics and X-ray diffraction analysis (XRD). The experimental results showed that for oscillating leaching of oxalic acid, citric acid and tartaric acid, the optimal parameter was oscillating for 8hours with concentration of 0.5mol/L, and the leaching effect was in the descending order of oxalic acid > citric acid > tartaric acid > malic acid > acetic acid. On the premise of achieving the purpose of remediation, the whole crystalline phase of the soil after leaching was less damaged, the diffraction peaks of silica was obviously enhanced, the proportions of residual state in each soil sample were increased by 19.39%~27.20% and 0.63%~8.45%, the fluidity was obviously lowered by approximately 10%, and the stability was slightly enhanced. The results provided guiding references for chemical leaching remediation of radioactive contaminated soil.
蒋文波, 高柏, 沈威, 张海阳, 王娟, 易玲, 杨冰, 连国玺. 放射性核素钍污染土壤有机酸化学淋洗工艺[J]. 中国环境科学, 2021, 41(5): 2311-2318.
JIANG Wen-bo, GAO Bai, SHEN Wei, ZHANG Hai-yang, WANG Juan, YI Ling, YANG Bing, LIAN Guo-xi. The process of organic acid chemical leaching of radionuclide thorium polluted soil. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(5): 2311-2318.
Gavrilescu M, Pavel L V, Cretescu I. Characterization and remediation of soils contaminated with uranium[J]. Journal of Hazardous Materials, 2009,163(2/3):475-510.
[2]
易玲,高柏,刘媛媛,等.铀矿区周边水体典型核素污染特征及风险评价[J]. 中国环境科学, 2019,39(12):5342-5351. Yi L, Gao B, Liu Y Y, et al. Characteristics and risk assessment of typical nuclide pollution in surrounding water body of uranium ore area[J]. China Environmental Science, 2019,39(12):5342-5351.
[3]
张琼,王博,王亮,等.福岛核事故场外环境修复综述及启示[J]. 辐射防护, 2017,37(3):240-247. Zhang Q, Wang B, Wang L, et al. Review and enlightenment on the off-site environmental remediation of Fukushima Nuclear Accident[J]. Radiation Protection, 2017,37(3):240-247.
[4]
Kim S S, Han G S, Kim G N, et al. Advanced remediation of uranium-contaminated soil[J]. Journal of Environmental Radioactivity, 2016, 164:239-244.
[5]
Kenneth H W, John R B, Jonathan R L, et al. Bioremediation of uranium-contaminated groundwater:a systems approach to subsurface biogeochemistry[J]. Current Opinion in Biotechnology, 2013,24(3):489-497.
[6]
全国土壤污染状况调查公报正式公布[J]. 中国环境管理, 2014, 6(2):26. The national survey of soil pollution was officially released[J]. Chinese Journal of Environmental Management, 2014,6(2):26.
[7]
Pietro C, Agostino C, Stefano G, et al. Experimental system to displace radioisotopes from upper to deeper soil layers:chemical research[J]. Environmental Health, 2004,3(1):269-279.
[8]
Napier B A. Alternative conceptual models for assessing food chain pathways in Biosphere Models[D]. U.S. Nuclear Regulatory Commission Office of Nuclear Regulatory Research Washington, DC 2007.
[9]
Society R. The health hazards of depleted uranium munitions Part I[J]. Journal of Radiological Protection, 2001,21(3):331-332.
[10]
唐志坚,张平,左社强.低浓度含铀废水处理技术的研究进展[J]. 工业用水与废水, 2003,(4):9-12. Tang Z J, Zhang P, Zuo S Q. Research progress in the treatment of wastewater containing low concentration uranium[J]. Industrial Water, 2003,(4):9-12.
[11]
Laura N, Katherine M, Jonathan R L. The biogeochemistry and bioremediation of uranium and other priority radionuclides[J]. Chemical Geology, 2014,363:164-184.
[12]
沙峰.放射性污染土壤的清洗去污研究[D]. 北京:中国原子能科学研究院, 2005. Sha F. Study on decontamination of radioactive contaminated soil[D]. Beijing:China Institute of Atomic Energy, 2005.
[13]
万小岗,赵颜红,习成成,等.铀污染土壤淋洗去污实验研究[J]. 环境工程, 2013,31(S1):710-712. Wang X G, Zhao Y H, Xi C C, et al. Experimental study on leaching and decontamination of uranium contaminated soil[J]. Environmental Engineering, 2013,31(S1):710-712.
[14]
杜蕾.化学淋洗与生物技术联合修复重金属污染土壤[D]. 西安:西北大学, 2018. Du L. Remediation of heavy metal contaminated soil by chemical leaching and biotechnology[D]. Xi¢an:Northwest University, 2018.
[15]
吕青松,蒋煜峰,杨帆,等.重金属污染土壤淋洗技术研究进展[J]. 甘肃农业科技, 2010,(3):33-37. Lv Q S, Jiang Y F, Yang F, et al. Research progress on leaching technology of heavy metal contaminated soil[J]. Gansu Agricultural Science and Technology, 2010,(3):33-37.
[16]
王佳明.铅锌污染土壤超声强化有机酸淋洗技术研究[D]. 北京:清华大学, 2016. Wang J M. Study on ultrasonic Enhancement of Organic acid leaching in Lead-Zinc contaminated soil[D]. Beijing:Tsinghua University, 2016.
[17]
邹泽李.工业废弃地重金属污染土壤化学淋洗修复研究及工程示范[D]. 广州:中山大学, 2009. Zou Z L. Research and Engineering Demonstration on chemical leaching and Remediation of soil contaminated by heavy metals in abandoned industrial lands[D]. Guangzhou:Sun Yat-Sen University, 2009.
[18]
高国龙,张望,周连碧,等.重金属污染土壤化学淋洗技术进展[J]. 有色金属工程, 2013,3(1):49-52. Gao G L, Zhang W, Zhou L B, et al. Progress in chemical leaching of soil contaminated by heavy metals[J]. Nonferrous Metals, 2013, 3(1):49-52.
[19]
沈威,高柏,章艳红,等.化学淋洗法对铀污染土壤的修复效果研究[J]. 有色金属(冶炼部分), 2019,(11):81-86. Shen W, Gao B, Zhang Y H, et al. Study on the remediation effect of uranium contaminated soil by chemical leaching[J].Nonferrous Metals(Extractive Metallurgy), 2019,(11):81-96.
[20]
可欣,张昀,李培军,等.利用酒石酸土柱淋洗法修复重金属污染土壤[J]. 深圳大学学报理工版, 2009,26(3):240-245. Ke X, Zhang Y, Li P J, et al. Remediation of heavy metal contaminated soil by column leaching with tartaric acid was studied[J]. Journal of Shenzhen University Science and Engineering, 2009,26(3):240-245.
[21]
Qiu R, Zou Z, Zhao Z, et al. Removal of trace and major metals by soil washing with Na2EDTA and oxalate[J]. Journal of Soils & Sediments, 2010,10(1):45-53.
[22]
Han F X, Banin A, Kingery W L, et al. New approach to studies of heavy metal redistribution in soil[J]. Advances in Environmental Research, 2003,8(1):113-120.
[23]
Ma L Q, Rao G N. Chemical fractionation of Cadmium, Copper, Nickel, and Zinc in contaminated soils[J]. Journal of Environmental Quality, 1997,26(1):259-264.
[24]
Udovic M, Lestan D. EDTA and HCl leaching of calcareous and acidic soils polluted with potentially toxic metals:Remediation efficiency and soil impact[J]. Chemosphere, 2012,88(6):718-724.
