雷秋霜2,
张红振2,
司绍诚2,
张茜雯1,2,
薛浩天3,
张焕祯1
1.中国地质大学北京水资源与环境学院, 北京 100083
2.环境保护部环境规划院, 北京 100012
3.青海省环境科学研究设计院, 西宁 810007
基金项目: 国家自然科学青年基金资助项目 （71403097）
国家高技术研究发展计划 （863） 项目 （2013AA06A211）
Effects evaluation of phosphate stabilized zinc contaminated soil in laboratory test and field remediation construction
DONG Jingqi1,2,,LEI Qiushuang2,
ZHANG Hongzhen2,
SI Shaocheng2,
ZHANG Qianwen1,2,
XUE Haotian3,
ZHANG Huanzhen1
1.School of Water Resources and Environment, China University of Geosciences Beijing, Beijing 100083, China
2.Chinese Academy for Environmental Planning, Beijing 100012, China
3.Qinghai Provincial Research and Design Academy of Environmental Science, Xining 810007, China
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摘要:采用磷矿粉和某商业药剂为主要稳定化修复材料，针对某典型锌污染场地（包括锌污染土壤和工业废渣）开展实验室小试、稳定化修复工程和长期跟踪稳定化效果评估。结果表明，采用磷矿粉+熟石灰组合对锌污染土壤和建筑废渣具有长期稳定并大幅降低污染介质中锌浸出浓度的效果，实验室小试时投加比为2%时，锌的浸出可完全满足场地修复目标值25 mg·L-1的浓度限值；在现场施工时，为保守起见，设定稳定化药剂投加比例4%，在稳定化过程中，pH变化趋势为逐渐升高到11左右，然后降低稳定至7.0左右，废渣和污染土壤中锌浸出分别为0.2 mg·L-1、0.05 mg·L-1以下；稳定化修复后450 d，再次采样测定锌的浸出和pH，结果分别为低于0.2~2.0 mg·L-1和7.3左右，完全达到预期长期稳定化效果。实验室小试和稳定化工程结果可为后续锌污染场地治理修复提供技术参考和借鉴。
关键词: 重金属/
锌/
污染场地/
稳定化/
长期效果
Abstract:A typical zinc contaminated site including zinc contaminated soil and industrial waste residue was remediated adopting phosphate ore and a certain kind of commercial reactant as mainly stabilization materials. Meanwhile, laboratory bench-scale experiment, stabilization remediation construction and long-term performance appraisal of stabilization are evaluated. Based on the results, the combination of phosphate ore and slaked lime has positively long-term effect on the stability of remediated contaminated soil and industrial waste residue, reducing the leaching concentration of zinc in pollutant medium. When the dosing ratio in laboratory bench-scale experiment was 2%, the leaching zinc concentration could meet the remediation target 25 mg·L-1. During the on-site construction, to be prudent, the stabilization reactant dosing ratio was set as 4%. During the stabilizing processes, pH of contaminated soils was gradually increased to around 11, and then returned to around 7 after it was stable. The results show that the zinc leaching concentration of waste residue and contaminated soil was 0.2 mg·L-1 and 0.05 mg·L-1 respectively. After 450 days of the stabilized remediation, the zinc leaching concentration and pH of resampling results were from 0.2 mg·L-1 to 2.0 mg·L-1 and around 7.3, respectively. It is perfectly satisfied with the predicted long-term stabilization result. The laboratory bench-scale experiment and stabilization remediation construction could be referential to subsequent remediation of zinc contaminated sites.
Key words:heavy metal/
zinc/
contaminated site/
stabilization/
long term effect.
| [1] | WUANA A R, OKIEIMEN E F, MONTUELLE B, et al.Heavy metals in contaminated soils: A review of sources, chemistry, risks and best available strategies for remediation[J].ISRN Ecology, 2011, 2011: 1-20 10.5402/2011/402647 |
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| [4] | 曹俊, 向斌, 高焕方, 等. 磷酸盐稳定化处理铅污染土壤及铅的形态分析[J]. 环境工程学报, 2016, 10(10): 6015-6020 10.12030/j.cjee.201505059 |
| [5] | MEYLAN G, RECK B K.The anthropogenic cycle of zinc: Status quo and perspectives[J].Resources, Conservation and Recycling, 2017, 123:1-10 10.1016/j.resconrec.2016.01.006 |
| [6] | WANG F.Time-related performance of soil mix technology stabilized soils from two contaminated sites[D].Cambridge: University of Cambridge, 2015 |
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| [8] | LOTHENBACH B.Gentle soil remediation: Immobilization of heavy metals by aluminum and montmorillonite compound[D].Zurich: Swiss Federal Institute of Technology Zurich (ETH), 1996 10.3929/ethz-a-001710156 |
| [9] | BEATRICE K, MARIANNE B, BARBARA L, et al.The influence of nitrilotriacetate on heavy metal uptake of lettuce and ryegrass[J].Journal of Environmental Quality, 1999, 28(6):1699-1705 10.2134/jeq1999.00472425002800060002x |
| [10] | ROLF K, KUMAR G S, GERHARD F, et al.Gravel sludge as immobilizing additive in soils polluted by heavy metals: A field study[J].Water, Air and Soil Pollution, 1998, 115 (1/2/3/4):465-479 10.1023/A:1005167004828 |
| [11] | BARBARA L, ROLF K, KUMAR G S, et al.Immobilization of cadmium and zinc in soil by Al-montmorillonite and gravel sludge[J].European Journal of Soil Science, 1998, 49:141-148 10.1046/j.1365-2389.1998.00140.x |
| [12] | ROLF K, GUPTA, KUMAR G S, et al.Solubility and plant uptake of metals with and without liming of sludge-amended soils[J].Journal of Environmental Quality, 1998, 27(1):18-23 10.2134/jeq1998.00472425002700010004x |
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| [14] | 董璟琦, 张红振, 吴舜泽, 等. 西部某机械加工企业酸洗场地环境调查与污染特征分析[J]. 环境工程学报, 2016, 10(9):5222-5230 10.12030/j.cjee.201601190 |
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磷酸盐稳定化修复锌污染土壤小试和工程效果评估
董璟琦1,2,,雷秋霜2,
张红振2,
司绍诚2,
张茜雯1,2,
薛浩天3,
张焕祯1
1.中国地质大学北京水资源与环境学院, 北京 100083
2.环境保护部环境规划院, 北京 100012
3.青海省环境科学研究设计院, 西宁 810007
基金项目: 国家自然科学青年基金资助项目 （71403097） 国家高技术研究发展计划 （863） 项目 （2013AA06A211）
关键词: 重金属/
锌/
污染场地/
稳定化/
长期效果
摘要:采用磷矿粉和某商业药剂为主要稳定化修复材料，针对某典型锌污染场地（包括锌污染土壤和工业废渣）开展实验室小试、稳定化修复工程和长期跟踪稳定化效果评估。结果表明，采用磷矿粉+熟石灰组合对锌污染土壤和建筑废渣具有长期稳定并大幅降低污染介质中锌浸出浓度的效果，实验室小试时投加比为2%时，锌的浸出可完全满足场地修复目标值25 mg·L-1的浓度限值；在现场施工时，为保守起见，设定稳定化药剂投加比例4%，在稳定化过程中，pH变化趋势为逐渐升高到11左右，然后降低稳定至7.0左右，废渣和污染土壤中锌浸出分别为0.2 mg·L-1、0.05 mg·L-1以下；稳定化修复后450 d，再次采样测定锌的浸出和pH，结果分别为低于0.2~2.0 mg·L-1和7.3左右，完全达到预期长期稳定化效果。实验室小试和稳定化工程结果可为后续锌污染场地治理修复提供技术参考和借鉴。
English Abstract
Effects evaluation of phosphate stabilized zinc contaminated soil in laboratory test and field remediation construction
DONG Jingqi1,2,,LEI Qiushuang2,
ZHANG Hongzhen2,
SI Shaocheng2,
ZHANG Qianwen1,2,
XUE Haotian3,
ZHANG Huanzhen1
1.School of Water Resources and Environment, China University of Geosciences Beijing, Beijing 100083, China
2.Chinese Academy for Environmental Planning, Beijing 100012, China
3.Qinghai Provincial Research and Design Academy of Environmental Science, Xining 810007, China
Keywords: heavy metal/
zinc/
contaminated site/
stabilization/
long term effect
Abstract:A typical zinc contaminated site including zinc contaminated soil and industrial waste residue was remediated adopting phosphate ore and a certain kind of commercial reactant as mainly stabilization materials. Meanwhile, laboratory bench-scale experiment, stabilization remediation construction and long-term performance appraisal of stabilization are evaluated. Based on the results, the combination of phosphate ore and slaked lime has positively long-term effect on the stability of remediated contaminated soil and industrial waste residue, reducing the leaching concentration of zinc in pollutant medium. When the dosing ratio in laboratory bench-scale experiment was 2%, the leaching zinc concentration could meet the remediation target 25 mg·L-1. During the on-site construction, to be prudent, the stabilization reactant dosing ratio was set as 4%. During the stabilizing processes, pH of contaminated soils was gradually increased to around 11, and then returned to around 7 after it was stable. The results show that the zinc leaching concentration of waste residue and contaminated soil was 0.2 mg·L-1 and 0.05 mg·L-1 respectively. After 450 days of the stabilized remediation, the zinc leaching concentration and pH of resampling results were from 0.2 mg·L-1 to 2.0 mg·L-1 and around 7.3, respectively. It is perfectly satisfied with the predicted long-term stabilization result. The laboratory bench-scale experiment and stabilization remediation construction could be referential to subsequent remediation of zinc contaminated sites.
