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EGTA淋洗和KH2PO4钝化联合修复重金属污染土壤

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王明新, 张金永, 肖扬, 王世泽. EGTA淋洗和KH2PO4钝化联合修复重金属污染土壤[J]. 环境化学, 2019, (10): 2366-2375. doi: 10.7524/j.issn.0254-6108.2018111404
引用本文: 王明新, 张金永, 肖扬, 王世泽.

EGTA淋洗和KH2PO4钝化联合修复重金属污染土壤

[J]. 环境化学, 2019, (10): 2366-2375. doi: 10.7524/j.issn.0254-6108.2018111404
shu
WANG Minxing, ZHANG Jinyong, XIAO Yang, WANG Shize. Remediation of heavy metal contaminated soil by combined EGTA washing and KH2PO4 immobilization[J]. Environmental Chemistry, 2019, (10): 2366-2375. doi: 10.7524/j.issn.0254-6108.2018111404
Citation: WANG Minxing, ZHANG Jinyong, XIAO Yang, WANG Shize. Remediation of heavy metal contaminated soil by combined EGTA washing and KH2PO4 immobilization[J]. Environmental Chemistry, 2019, (10): 2366-2375. doi: 10.7524/j.issn.0254-6108.2018111404
shu

EGTA淋洗和KH2PO4钝化联合修复重金属污染土壤

  • 常州大学环境与安全工程学院, 常州, 213164

    • 通讯作者: 王明新, E-mail: wmxcau@163.com ; 
  • 基金项目:

    国家自然科学基金（41772240），江苏省"六大人才高峰"项目（JNHB-003）和江苏省高校"青蓝工程"项目资助.

Remediation of heavy metal contaminated soil by combined EGTA washing and KH2PO4 immobilization

  • School of Environmental and Safety Engineering, Changzhou University, Changzhou, 213164, China

    • Corresponding author: WANG Minxing, wmxcau@163.com ; 
  • Fund Project: Supported by the National Natural Science Foundation of China (41772240), the "Six Major Talent Summit" Project of Jiangsu Province(JNHB-003) and the "Qing Lan" Project for university of Jiangsu Province.

  • 摘要: 为进一步削减螯合淋洗后土壤残留重金属的环境风险，采用淋洗与钝化相结合的方法修复重金属污染土壤.研究了乙二醇双（2-氨基乙基醚）四乙酸（EGTA）淋洗、磷酸二氢钾（KH2PO4）钝化及两者联合修复对土壤重金属洗脱率的影响，并分别采用TCLP法和BCR法分析重金属浸出浓度及化学形态分布，构建了涵盖土壤重金属残留量、生物有效性和毒性的环境风险评价方法，对淋洗、钝化及其联合修复效果进行了评价.结果表明，EGTA对Cu和Cd具有较好的洗脱效果，降低了土壤Cu、Zn和Cd浸出浓度，提高了Pb浸出浓度，削减了可还原态Cu残留量、弱酸提取态和可还原态Zn残留量、可还原态Pb残留量以及弱酸提取态、可还原态Cd残留量.随着KH2PO4投加量的增加，Pb、Cd和Cu浸出浓度呈下降趋势，Zn浸出浓度先上升后下降.KH2PO4对重金属形态分布的影响主要表现为降低弱酸态或可还原态重金属占比，提高残渣态重金属占比.EGTA和KH2PO4联合修复显著降低了4种重金属的可还原态残留量和弱酸提取态Pb、Cd残留量，大幅度削减了Cd和Cu的浸出浓度和环境风险.Zn污染土壤宜淋洗修复，Pb污染土壤宜钝化修复，Cd和Cu污染土壤深度修复宜淋洗/钝化联合处理.
    Abstract: In order to further reduce the environmental risk of heavy metals remaining in the soil after chelation, a combination method of washing and immobilizatio was used to repair heavy metal contaminated soil. The washing rates, leaching concentration and chemical specification of heave metals in soil by ethylenebis(oxyethylenenitrilo)tetraacetic acid (EGTA) washing, potassium dihydrogen phosphate (KH2PO4) immobilization and their combination treatment were studied. The TCLP method and BCR method were used to analyze the leaching concentration and chemical form distribution of heavy metals. An environmental risk assessment method covering soil heavy metal concentration, bioavailability and toxicity was constructed to evaluate the remediation efficiency. The results showed that EGTA had higher removal rates of Cu and Cd. EGTA treatments reduced the leaching concentration of Cu, Zn and Cd in soil, and the increased the leaching concentration of Pb. Considering chemical specification of heavy metals, EGTA treatments reduced the reducible Cu, weak acid extractable and reducible Zn, the reducible and residual Pb, the weak acid extractable and reducible Cd residues in soil. With the increase of KH2PO4 dosage, the leaching concentration of Pb, Cd and Cu showed a downward trend, and the leaching concentration of Zn increased first and then decreased. The effect of KH2PO4 on the chemical specification of heavy metals was mainly reflected in the decrease of the proportion of the weak acid extractable fraction or the reducible fraction, and the increase of the residual fraction. The combination of EGTA and KH2PO4 significantly reduced the reducible heavy metals and the weak acid extractable Pb and Cd residues. Combined remediation had a synergistic effect on reducing cadmium leaching concentrations and environmental risks. Washing was suitable for Zn contaminated soil remediation, immobilization was suitable for Pb contaminated soil, and combined washing and immobilization was suitable for Cd or Cu contaminated soil deep remediation.
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  • [1] 邓红侠, 田鹏, 丁克廉, 等. 不同淋洗剂对塿土中Cu、Pb的淋洗效果及对其他元素淋出的影响[J]. 环境化学, 2017, 36(6):1343-1352.

    DENG H X, TIAN P, DING K L, et al. Leaching effects of copper and lead from contaminated Lou soil using different eluent and influence on other major elements[J]. Environmental Chemistry, 2017, 36(6):1343-1352(in Chinese).

    [2] 钟振宇, 赵庆圆, 陈灿, 等. 腐殖酸和含磷物质对模拟铅污染农田土壤的钝化效应[J]. 环境化学, 2018, 37(6):1327-1336.

    ZHONG Z Y, ZHAO Q Y, CHEN C, et al. Passivation of simulated lead contaminated farmland soil using humic acid and phosphate[J]. Environmental Chemistry, 2018, 37(6):1327-1336(in Chinese).

    [3] 郑超, 彭辉婷, 杨杰文, 等. 纳米氧化铁催化柠檬酸还原Cr(Ⅵ)及其土壤环境意义[J]. 环境化学, 2016, 35(11):2370-2376.

    ZHENG C, PENG H, YANG J, et al. Characterization of nano iron oxide catalyzed Cr(Ⅵ) reduction by citric acid and its significance to soil environments[J]. Environmental Chemistry, 2016, 35(11):2370-2376(in Chinese).

    [4] 温东东, 付融冰, 张卫,等. 不锈钢电极对重金属污染土壤的强化电动修复及电极腐蚀结晶现象与机制[J]. 环境科学, 2017, 38(3):1209-1217.

    WEN D D, FU R B, ZHANG W, et al. Enhanced electrokinetic remediation of heavy metals contaminated soils by stainless steel electrodes as well as the phenomenon and mechanism of electrode corrosion and crystallization[J]. Environmental Science, 2017, 38(3):1209-1217(in Chinese).

    [5] 荀志祥,姚静波,王明新,等.超声辅助EDDS/EGTA淋洗对土壤重金属形态、环境风险的影响及响应面优化[J].环境科学学报,2018,38(7):2858-2867.

    XUN Z X, YAO J B, WANG M X, et al. Effects of ultrasound-assisted EDDS/EGTA washing on specification and environmental of heavy metals in soil and optimization by response surface method[J]. Acta Scientiae Circumstantiae, 2018, 38(7):2858-2867(in Chinese).

    [6] WANG G, ZHANG S, ZHONG Q, et al. Effect of soil washing with biodegradable chelators on the toxicity of residual metals and soil biological properties[J]. Science of the Total Environment, 2018, 625:1021-1029.
    [7] CHAE Y, CUI R, WOONG K S, et al. Exoenzyme activity in contaminated soils before and after soil washing:ß-glucosidase activity as a biological indicator of soil health[J]. Ecotoxicology & Environmental Safety, 2017, 135:368-374.
    [8] TRELLU C, OTURAN N, PECHAUD Y, et al. Anodic oxidation of surfactants and organic compounds entrapped in micelles-selective degradation mechanisms and soil washing solution reuse[J]. Water Research, 2017, 118:1-11.
    [9] TSANG D C, HARTLEY N R. Metal distribution and spectroscopic analysis after soil washing with chelating agents and humic substances[J]. Environmental Science and Pollution Research International, 2014, 21(5):3987-3995.
    [10] BEIYUAN J, TSANG D C W, YONG S O, et al. Integrating EDDS-enhanced washing with low-cost stabilization of metal-contaminated soil from an e-waste recycling site[J]. Chemosphere, 2016, 159:426-432.
    [11] YOO J C, BEIYUAN J, WANG L, et al. A combination of ferric nitrate/EDDS-enhanced washing and sludge-derived biochar stabilization of metal-contaminated soils[J]. Science of the Total Environment, 2018, 616-617:572-582.
    [12] WU L H, LUO Y M, XING X R, et al. EDTA-enhanced phytoremediation of heavy metal contaminated soil with Indian mustard and associated potential leaching risk[J]. Agriculture Ecosystems & Environment, 2004, 102(3):307-318.
    [13] LUO C, SHEN Z, LI X. Enhanced phytoextraction of Cu, Pb, Zn and Cd with EDTA and EDDS[J]. Chemosphere, 2005, 59(1):1-11.
    [14] EPELDE L, HERNÁNDEZ-ALLICA J, BECERRIL J M, et al. Effects of chelates on plants and soil microbial community:Comparison of EDTA and EDDS for lead phytoextraction[J]. Science of the Total Environment, 2008, 401(1-3):21-28.
    [15] BOLAN N, KUNHIKRISHNAN A, THANGARAJAN R, et al. Remediation of heavy metal(loid)s contaminated soils-to mobilize or to immobilize?[J]. Journal of Hazardous Materials, 2014, 266(4):141-166.
    [16] 孙约兵, 徐应明, 史新,等. 污灌区镉污染土壤钝化修复及其生态效应研究[J]. 中国环境科学, 2012, 32(8):1467-1473.

    SUN Y B, XU Y M, SHI X, et al. The immobilization remediation of Cd contaminated soils in wastewater irrigation region and its ecological effects[J]. China Environmental Sciencece, 2012, 32(8):1467-1473(in Chinese).

    [17] CAO X, MA L, LIANG Y, et al. Simultaneous immobilization of lead and atrazine in contaminated soils using dairy-manure biochar[J]. Environmental Science & Technology, 2011, 45(11):4884-4889.
    [18] YAN Y, QI F, BALAJI S, et al. Utilization of phosphorus loaded alkaline residue to immobilize lead in a shooting range soil[J]. Chemosphere, 2016, 162:315-323.
    [19] MIGNARDI S, CORAMI A, FERRINI V. Evaluation of the effectiveness of phosphate treatment for the remediation of mine waste soils contaminated with Cd, Cu, Pb, and Zn[J]. Chemosphere, 2012, 86(4):354-360.
    [20] KULIKOWSKA D, GUSIATIN Z M, BUŁKOWSKA K, et al. Feasibility of using humic substances from compost to remove heavy metals (Cd, Cu, Ni, Pb, Zn) from contaminated soil aged for different periods of time[J]. Journal of Hazardous Materials, 2015, 300:882-891.
    [21] JIANG J, YANG M, GAO Y, et al. Removal of toxic metals from vanadium-contaminated soils using a washing method:Reagent selection and parameter optimization[J]. Chemosphere, 2017, 180:295-301.
    [22] 吴玉俊,周航,杨文弢,等. 组配改良剂对污染稻田中Pb、Cd、Cu和Zn钝化效果持续性比较[J]. 环境科学,2016, 37(7):2791-2798.

    WU Y J,ZHOU H,YANG W T, et al. Comparison of the persistence of a combined amendment stabilizing Pb, Cd, Cu and Zn in polluted paddy soil[J]. Environmental Science, 2016, 37(7):2791-2798(in Chinese).

    [23] MOON D H, HWANG I, KOUTSOSPYROS A, et al. Stabilization of lead (Pb) and zinc (Zn) in contaminated rice paddy soil using starfish:A preliminary study[J]. Chemosphere, 2018, 199:459-467.
    [24] 姚静波, 王明新, 齐今笛, 等. 高架道路周边建筑物灰尘重金属污染风险:以常州市为例[J]. 环境科学, 2017, 38(5):1807-1816.

    YAO J B, WANG M X, QI J D, et al. Pollution risk of heavy metals in dust from the building along elevated road:A case study in Changzhou[J]. Environmental Science, 2017, 38(5):1807-1816(in Chinese).

    [25] WU W H, WANG F, SHI J C, et al. Immobilization of trace metals by phosphates in contaminated soil near lead/zinc mine tailings evaluated by sequential extraction and TCLP[J]. Journal of Soils & Sediments Protection Risk Assessment & Rem, 2013, 13(8):1386-1395.
    [26] 中国环境监测总站. 1990. 中国土壤元素背景值[M]. 北京:中国环境科学出版社. China Environmental Monitoring Station. Background value of soil element in China[M]. Beijing:China Environmental Science Press, 1990:334-407

    (in Chinese).

    [27] 冯静, 张增强, 李念,等. 铅锌厂重金属污染土壤的螯合剂淋洗修复及其应用[J]. 环境工程学报, 2015, 9(11):5617-5625.

    FENG J, ZHANG Z Q, LI N, et al. Washing of heavy metal contaminated soil around a lead-zinc smelter by several chelating agents and the leached soil utilization[J]. Chinese Journal of Environmental Engineering, 2015, 9(11):5617-5625(in Chinese).

    [28] SAUVÉ S, MCBRIDE M, HENDERSHOT W. Soil Solution Speciation of Lead(II):Effects of Organic Matter and pH[J]. Soil Science Society of America Journal, 1998, 62(3):618-621.
    [29] 吴烈善, 曾东梅, 莫小荣,等. 2015. 不同钝化剂对重金属污染土壤稳定化效应的研究[J]. 环境科学, 2015, 36(1):309-313.

    WU L S, ZENG D M, MO X R, et al. Immobilization impact of different fixatives on heavy metals contaminated soil[J]. Environmental Science, 2015, 36(1):309-313(in Chinese).

    [30] 蔡轩, 龙新宪, 种云霄,等. 无机-有机混合改良剂对酸性重金属复合污染土壤的修复效应[J]. 环境科学学报, 2015, 35(12):3991-4002.

    CAI X, LONG X X, CHONG Y X, et al. Inorganic-organic amendments for immobilization of metal contaminants in an acidic soil[J].Acta Scientiae Circumstantiae, 2015, 35(12):3991-4002(in Chinese).

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  • 收稿日期:  2018-09-06

EGTA淋洗和KH2PO4钝化联合修复重金属污染土壤

    通讯作者: 王明新, E-mail: wmxcau@163.com ; 
  • 常州大学环境与安全工程学院, 常州, 213164
  • 收稿日期:  2018-09-06
基金项目:

国家自然科学基金（41772240），江苏省"六大人才高峰"项目（JNHB-003）和江苏省高校"青蓝工程"项目资助.

摘要: 为进一步削减螯合淋洗后土壤残留重金属的环境风险，采用淋洗与钝化相结合的方法修复重金属污染土壤.研究了乙二醇双（2-氨基乙基醚）四乙酸（EGTA）淋洗、磷酸二氢钾（KH2PO4）钝化及两者联合修复对土壤重金属洗脱率的影响，并分别采用TCLP法和BCR法分析重金属浸出浓度及化学形态分布，构建了涵盖土壤重金属残留量、生物有效性和毒性的环境风险评价方法，对淋洗、钝化及其联合修复效果进行了评价.结果表明，EGTA对Cu和Cd具有较好的洗脱效果，降低了土壤Cu、Zn和Cd浸出浓度，提高了Pb浸出浓度，削减了可还原态Cu残留量、弱酸提取态和可还原态Zn残留量、可还原态Pb残留量以及弱酸提取态、可还原态Cd残留量.随着KH2PO4投加量的增加，Pb、Cd和Cu浸出浓度呈下降趋势，Zn浸出浓度先上升后下降.KH2PO4对重金属形态分布的影响主要表现为降低弱酸态或可还原态重金属占比，提高残渣态重金属占比.EGTA和KH2PO4联合修复显著降低了4种重金属的可还原态残留量和弱酸提取态Pb、Cd残留量，大幅度削减了Cd和Cu的浸出浓度和环境风险.Zn污染土壤宜淋洗修复，Pb污染土壤宜钝化修复，Cd和Cu污染土壤深度修复宜淋洗/钝化联合处理.

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