浙江省某尾矿库周边农田土壤重金属污染特征及来源解析

吕玉娟; 王秋月; 孙雪梅; 张志伟; 张毅敏; 高月香

doi:10.12153/j.issn.1674-991X.20221193

浙江省某尾矿库周边农田土壤重金属污染特征及来源解析

doi: 10.12153/j.issn.1674-991X.20221193

吕玉娟^1,,
王秋月^{1, 2,},
孙雪梅^{1, 2},
张志伟¹,
张毅敏¹,
高月香^1, ,

1.
生态环境部南京环境科学研究所
2.
河海大学环境学院

基金项目: 国家自然科学基金项目（72174127，42107098）；中央高校建设世界一流大学(学科)和特色发展引导专项（B22017010204）

详细信息

作者简介:
吕玉娟（1987—），女，助理研究员，博士，主要从事土壤污染与氮循环研究，lv_yujuan@163.com

通讯作者:
高月香（1981—），女，副研究员，硕士，主要从事湖泊生态修复及黑臭河道治理技术研究，gyx@nies.org

中图分类号: X53
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- 文章访问数: 176
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- 被引次数: 0
出版历程
- 收稿日期: 2022-11-29
- 录用日期: 2023-06-14
- 修回日期: 2023-04-10
- 网络出版日期: 2023-09-20

Pollution characteristics and source identification of heavy metals in farmland soils around a tailing pond in Zhejiang Province

LÜ Yujuan^1
,,
WANG Qiuyue^{1, 2
,},
SUN Xuemei^{1, 2},
ZHANG Zhiwei¹,
ZHANG Yimin¹,
GAO Yuexiang^{1
, ,}

1.
Nanjing Institute of Environmental Science, Ministry of Ecology and Environment
2.
College of Environment, Hohai University

摘要

摘要:
尾矿库周边生态环境安全受到高度关注，土壤重金属污染是农田治理和保护的风险源之一。以地处浙东丘陵山地的浙江省某铜矿尾矿库周边农田为研究对象，测定了农田土壤中8种重金属元素Cd、Hg、As、Pb、Zn、Cu、Cr、Ni的浓度，运用地累积指数法、污染指数法、潜在生态风险指数法和生态风险预警指数法对农田土壤重金属污染程度以及生态风险进行评价，结合正定矩阵受体模型（PMF），定量解析农田土壤重金属的来源。结果表明：1）研究区农田土壤中Cd、Hg、Cu、Zn浓度分别是土壤元素背景值的5.36、2.06、8.19、5.36倍，具有高度变异性；污染指数评价结果表明，Cu、Zn、Cd重度污染占比均达到10.5%，中度污染占比为5.26%，靠近尾矿库（<300 m）的15.8%的点位处于重度污染等级；地累积指数评价结果表明，Cd、Cu、Zn和Hg可能具有累积风险。2）潜在生态风险评价结果表明，Cd为很强生态风险，Hg为较强生态风险，Cu为中等生态风险，其余重金属均为轻微风险；综合潜在生态风险指数（RI）为308.91，综合潜在风险为较强风险。生态风险预警评估结果表明，Cu为重警，Cd和Zn为中警，Hg为轻警，As为预警，Pb、Cr和Ni为无警；综合生态风险预警指数（IER）为16.06，综合生态风险预警为重警。RI和IER空间分布基本一致，主要受Cd、Cu、Zn和Hg的影响。3）PMF解析出3个源，Cd、Zn、Cu主要受铜矿尾矿库尾砂和坝下渗水的混合源影响，贡献率分别为94.4%、94.3%和67.1%；Hg可能是以肥料、农药施用等农业活动源为主，贡献率为61.5%；Cr、Ni、Pb和As主要受成土母质和交通运输活动混合源的影响，贡献率分别为89.7%、82.7%、75.0%和68.3%。
- 尾矿库 /
- 土壤重金属 /
- 污染评价 /
- 潜在生态风险 /
- 正定矩阵受体模型（PMF） /
- 源解析
Abstract:
The safety of the ecological environment around tailing ponds has received high attention, and soil heavy metal pollution is one of the risk sources of cultivated land management and protection. The concentrations of eight heavy metals Cd, Hg, As, Pb, Zn, Cu, Cr and Ni were measured in the soil of a copper mine tailing pond in Zhejiang Province, which was located in the hilly mountainous area of east Zhejiang Province, and the degree of soil heavy metal pollution and ecological risk around the tailing pond were evaluated by using the geo-accumulation index method, pollution index method, potential ecological risk index method and ecological risk warning index method. The sources of heavy metals in farmland soils were quantitatively analyzed by combining the positive definite matrix factor (PMF) receptor model. The results showed that: 1) The concentrations of Cd, Hg, Cu and Zn with a character of high variability in farmland soils in the study area were 5.36, 2.06, 8.19 and 5.36 times higher than the background values of soil elements, respectively. The pollution index showed that the percentage of heavy pollution of Cu, Zn and Cd all reached 10.5%, the percentage of moderate pollution was 5.26%, and 15.8% of the points near the tailing pond (<300 m) were in the severe pollution level. The geo-accumulation index indicated that Cd, Cu, Zn and Hg might have cumulative risks. 2) The results of the ecological risk index showed that Cd was with high potential ecological risk, Hg was with considerable potential ecological risk, Cu was with moderate ecological risk and the remaining heavy metals were minor risk. The comprehensive potential ecological risk index (RI) was 308.91, which belonged to high risk level. The results of the ecological risk warning index indicated Cu was severe warning, Cd and Zn were medium warning, Hg was mild warning, As was early warning, Pb, Cr and Ni were no warnings. The comprehensive ecological risk warning index (IER) was 16.06, which belonged to severe warning level. The spatial distribution patterns of RI and IER were similar, and Cd, Cu, Zn and Hg were the main warning elements and ecological risk factors in the study area. 3) The sources apportionment of heavy metals in the farmland soil based on PMF indicated that the heavy metal contamination in the area mainly came from three sources. Specifically, Cd, Zn and Cu pollution was mainly influenced by mixed of tailings from copper tailing pond and seepage water under the dam, and the corresponding contribution rate was 94.4%, 94.3% and 67.1%, respectively. Agricultural activities such as chemical fertilizer and pesticide application had the highest contribution to Hg, and its contribution rate was 61.5%. Natural parent material and transportation activities had the highest contribution to Cr, Ni, Pb and As, and the corresponding contribution rate was 89.7%, 82.7%, 75.0% and 68.3%, respectively.
- tailing pond /
- soil heavy metals /
- pollution assessment /
- potential ecological risk /
- positivedefinite matrix factor (PMF) /
- sources apportionment

HTML全文

图 1 尾矿库及研究区域位置

Figure 1. Location map of tailings pond area and the study area

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图 2 尾矿库周边农田土壤样品采集点位分布

Figure 2. Distribution of soil sample collection points in cultivated land around a tailing pond

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图 3 农田土壤重金属浓度空间分布

Figure 3. Spatial distribution map of six heavy metals content in farmland soil

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图 4 农田土壤重金属I_geo箱形图

Figure 4. Box diagram of I_geo of heavy metal content in farmland soil

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图 5 农田土壤重金属潜在生态风险空间分布

Figure 5. Spatial distribution of heavy metal RI in the farmland soil

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图 6 农田土壤重金属风险预警指数空间分布

Figure 6. Spatial distribution of heavy metal IER in the farmland soil

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图 7 研究区农田土壤重金属含量相关性热点图

注：**表示在0.01水平上极显著相关，*表示在0.05水平上显著相关。

Figure 7. Hot spot map of correlation of heavy metal contents in farmland soil in the study area

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图 8 各污染源因子对重金属贡献率

Figure 8. Contribution rates of different sources to heavy mental

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表 1 土壤重金属污染评价等级标准

Table 1. Assessment classification criteria of heavy metal pollution in soil

地累积指数（I_geo）		单因子污染指数（P_i）		内梅罗综合指数（P_n）
数值	污染程度	数值	污染程度	数值	污染程度
≤0	无污染	≤1.0	无污染	≤0.7	无污染
0~1	轻度污染	1.0~2.0	轻微污染	0.7~1.0	尚清洁污染
1~2	中度污染	2.0~3.0	轻度污染	1.0~2.0	轻度污染
2~3	偏重污染	3.0~5.0	中度污染	2.0~3.0	中度污染
3~4	重度污染	>5.0	重度污染	>3.0	重度污染
>4	严重污染

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表 2 土壤重金属环境风险等级标准

Table 2. Environmental risk level standard for heavy metals in soil

单项生态风险指数（$ {{E}}_{\text{r}}^{i} $）		综合潜在生态风险指数（RI）		生态风险预警指数（IER）
数值	风险等级	数值	风险等级	数值	预警指数等级
≤40	轻微风险	≤110	轻微风险	≤0	无警
40~80	中等风险	110~220	中等风险	0~1	预警
80~160	较强风险	220~440	较强风险	1~3	轻警
160~320	很强风险	>440	极强风险	3~5	中警
>320	极强风险			>5	重警

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表 3 农田土壤重金属浓度统计结果

Table 3. Heavy metal content in farmland soil

指标	最大值/ （mg/kg）	最小值/ （mg/kg）	均值/ （mg/kg）	标准差/ （mg/kg）	检出限/ （mg/kg）	背景值¹⁾/ （mg/kg）	筛选值/ （mg/kg）	偏度	峰度	变异系数/%	超标率/%
Cd	4.84	0.07	0.75	1.31	0.07	0.14	0.6	2.36	4.67	175	25.0
Hg	1.78	0.07	0.31	0.38	0.002	0.15	3.4	3.44	13.1	123	0
As	10.6	1.71	5.86	2.14	0.01	5.40	25	0.19	−0.14	37	0
Pb	37	15	25	5.63	2.0	31.6	170	0.75	0.55	23	0
Zn	2 825	37	419	809	2.0	78.2	300	2.33	4.31	193	39.7
Cu	1 536	19.4	172	365	1.2	21.0	100	3.14	10.4	212	72.7
Cr	35	23	29	3.36	3.0	47.6	250	0.01	−0.86	12	0
Ni	18	9	12	1.99	1.5	21.5	190	1.08	2.74	17	0
1)为绍兴市土壤元素背景值^[18]。注：采集样品数量为19个。

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表 4 农田土壤重金属污染指数

Table 4. Heavy metal pollution index in farmland soil

统计值	单因子污染指数${\text{（}{P} }_{{i} }）$								内梅罗综合指数（$ {{P}}_{\text{n}}） $
统计值	Cd	Hg	As	Pb	Zn	Cu	Cr	Ni	内梅罗综合指数（$ {{P}}_{\text{n}}） $
最小值	0.12	0.02	0.07	0.09	0.12	0.19	0.09	0.05	0.22
最大值	8.07	0.52	0.42	0.22	9.42	15.36	0.14	0.09	11.2
平均值	1.25	0.09	0.23	0.15	1.40	1.73	0.11	0.06	1.43
标准差	2.19	0.11	0.09	0.03	2.70	3.65	0.01	0.01	2.82
变异系数/%	175	122	39.0	20.0	193	211	9.00	17.0	197
无污染率/%	84.2	100	100	100	84.2	84.2	100	100	84.2
中度污染率/%	5.26	0	0	0	5.26	5.26	0	0	0
重度污染率/%	10.5	0	0	0	10.5	10.5	0	0	15.8

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参考文献(36)

[1]	李海东, 马伟波, 胡国长. 矿区修复生态学理论与实践[M]. 北京: 中国环境出版集团, 2022.
[2]	LI C F, WANG A J, CHEN X J, et al. Regional distribution and sustainable development strategy of mineral resources in China[J]. Chinese Geographical Science,2013,23(4):470-481. doi: 10.1007/s11769-013-0611-z
[3]	朱点钰, 杨倩琪.中国矿区重金属污染现状及生态风险研究[J]. 矿产勘查,2018,9(4):747-750. ZHU D Y, YANG Q Q. Study on heavy metal contamination and ecological risk in mining areas in China[J]. Mineral Exploration,2018,9(4):747-750.
[4]	李传飞, 刘登璐, 赵平, 等.某区域内矿区土壤重金属污染与生态风险评价[J]. 四川环境,2021,40(2):141-148. LI C F, LIU D L, ZHAO P, et al. Evaluation of soil heavy metal pollution and ecological risk in a mining area[J]. Sichuan Environment,2021,40(2):141-148.
[5]	吴洋, 杨军, 周小勇, 等.广西都安县耕地土壤重金属污染风险评价[J]. 环境科学,2015,36(8):2964-2971. WU Y, YANG J, ZHOU X Y, et al. Risk assessment of heavy metal contamination in farmland soil in Du'an autonomous County of Guangxi Zhuang Autonomous region, China[J]. Environmental Science,2015,36(8):2964-2971.
[6]	戴彬, 吕建树, 战金成, 等.山东省典型工业城市土壤重金属来源、空间分布及潜在生态风险评价[J]. 环境科学,2015,36(2):507-515. DAI B, LÜ J S, ZHAN J C, et al. Assessment of sources, spatial distribution and ecological risk of heavy metals in soils in a typical industry-based city of Shandong Province, Eastern China[J]. Environmental Science,2015,36(2):507-515.
[7]	LÜ J S, LIU Y, ZHANG Z L, et al. Identifying the origins and spatial distributions of heavy metals in soils of Ju Country (Eastern China) using multivariate and geostatistical approach[J]. Journal of Soils and Sediments,2015,15(1):163-178. doi: 10.1007/s11368-014-0937-x
[8]	王恩瑞, 杨光, 昌盛, 等.乾务水库表层沉积物氮磷和重金属时空分布特征与生态风险评价[J]. 环境工程技术学报,2023,13(3):1039-1049. doi: 10.12153/j.issn.1674-991X.20220636 WANG E R, YANG G, CHANG S, et al. Occurrence, spatiotemporal distribution and ecological risk assessment of nitrogen, phosphorus and heavy metals in the surface sediments of Qianwu Reservoir[J]. Journal of Environmental Engineering Technology,2023,13(3):1039-1049. doi: 10.12153/j.issn.1674-991X.20220636
[9]	邓红芮, 李积普, 罗琳, 等.矿山公园土壤重金属的生态与健康风险评价: 以湖南M矿为例[J]. 环境工程技术学报,2023,13(2):760-768. doi: 10.12153/j.issn.1674-991X.20220246 DENG H R, LI J P, LUO L, et al. Ecological and health risk assessment of soil heavy metals in a mining park: a case study of M Mine in Hunan Province[J]. Journal of Environmental Engineering Technology,2023,13(2):760-768. doi: 10.12153/j.issn.1674-991X.20220246
[10]	韩娟娟, 吴大鹏, 张涛.北京某金矿区土壤重金属污染特征及风险评价[J]. 城市地质,2021,16(4):424-431. HAN J J, WU D P, ZHANG T. Pollution characteristics and risk assessment of soil heavy metals in a certain gold mine area in Beijing[J]. Urban Geology,2021,16(4):424-431.
[11]	施建飞, 靳正忠, 周智彬, 等.额尔齐斯河流域典型尾矿库区周边土壤重金属污染评价[J]. 生态环境学报,2022,31(5):1015-1023. SHI J F, JIN Z Z, ZHOU Z B, et al. Evaluation of heavy metal pollution in the soil around a typical tailing reservoir in Irtysh River Basin[J]. Ecology and Environmental Sciences,2022,31(5):1015-1023.
[12]	孙德尧, 薛忠财, 韩兴, 等.冀北山区某矿区周边耕地土壤重金属污染特征及生态风险评价[J]. 生态与农村环境学报,2020,36(2):242-249. SUN D Y, XUE Z C, HAN X, et al. Polluting characteristics and ecological risk assessment of heavy metals in cultivated land around a mining area in northern Hebei Province[J]. Journal of Ecology and Rural Environment,2020,36(2):242-249.
[13]	廖文静, 李波, 陈杰, 等.云南淘金沟锡矿山废弃地重金属来源分布及污染评价[J]. 地质灾害与环境保护,2022,33(1):107-113. LIAO W J, LI B, CHEN J, et al. Source distribution and pollution evaluation of heavy metals in the wasteland of Taojingou tin mine, Yunnan[J]. Journal of Geological Hazards and Environment Preservation,2022,33(1):107-113.
[14]	赵家印, 杨地, 杨湘智, 等.云南省某煤矿开采遗址周边农用地土壤重金属污染评价及源解析研究[J]. 生态与农村环境学报,2022,38(11):1473-1481. ZHAO J Y, YANG D, YANG X Z, et al. Pollution assessment and source identi: cation of heavy metals in farmland soils around a coal mine area in Yunnan Province[J]. Journal of Ecology and Rural Environment,2022,38(11):1473-1481.
[15]	LÜ J S. Multivariate receptor models and robust geostatistics to estimate source apportionment of heavy metals in soils[J]. Environmental Pollution,2019,244:72-83. doi: 10.1016/j.envpol.2018.09.147
[16]	ZHANG F G, WANG C W, CHENG X M, et al. Ecological assessment, spatial analysis, and potential sources of heavy metals (HMs) in soils with high background values in the lead-zinc mine, Hezhang County, southwestern China[J]. Water,2022,14(5):783-783. doi: 10.3390/w14050783
[17]	朱晓丽, 薛博倩, 李雪, 等.基于PMF模型的宝鸡铅锌尾矿库周边农田土壤重金属源解析[J]. 西北大学学报(自然科学版),2021,51(1):43-53. ZHU X L, XUE B Q, LI X, et al. Sources apportionment of heavy metals in farmland soil around lead-zinc tailings reservoir based on PMF model[J]. Journal of Northwest University (Natural Science Edition),2021,51(1):43-53.
[18]	范允慧, 王艳青.浙江省四大平原区土壤元素背景值特征[J]. 物探与化探,2009,33(2):132-134. FAN Y H, WANG Y Q. Background characteristics of soil elements in four plains of Zhejiang Province[J]. Geophysical and Geochemical Exploration,2009,33(2):132-134.
[19]	李军, 李开明, 王晓槐, 等. 兰州市黄河风情线地表积尘及周边绿地土壤重金属污染特征及风险评价[J/OL]. 环境科学, 2022. [2023-01-02]. https://kns.cnki.net/kcms/detail/11.1895.X.20220919.1202.050.html. LI J, LI K M, WANG X H, et al. Pollution characteristics and risk assessment of heavy metals in surface dusts and its surrounding green land soils from Yellow River custom tourist line in Lanzhou[J/OL]. Environmental Science, 2022. [2023-01-02]. https://kns.cnki.net/kcms/detail/11.1895.X.20220919.1202.050.html.
[20]	刘洋, 刘明庆, 王磊, 等.云南某废弃硅厂周边农田土壤重金属污染评价[J]. 农业环境科学学报,2022,41(4):785-793. LIU Y, LIU M Q, WANG L, et al. Evaluation of heavy metal pollution in farmland soil around an abandoned silicon plant in Yunnan[J]. Journal of Agro-Environment Science,2022,41(4):785-793.
[21]	国家环境保护总局. 土壤环境监测技术规范: HJ/T 166—2004[S]. 北京: 中国环境出版社, 2004.
[22]	徐争启, 倪师军, 庹先国, 等.潜在生态危害指数法评价中重金属毒性系数计算[J]. 环境科学与技术,2008,31(2):112-115. XU Z Q, NI S J, TUO X G, et al. Calculation of heavy metals' toxicity coefficient in the evaluation of potential ecological risk index[J]. Environmental Science & Technology,2008,31(2):112-115.
[23]	YUAN G L, SUN T H, HAN P, et al. Source identification and ecological risk assessment of heavy metals in topsoil using environmental geochemical mapping: typical urban renewal area in Beijing, China[J]. Journal of Geochemical Exploration,2014,136:40-47. doi: 10.1016/j.gexplo.2013.10.002
[24]	李娇, 滕彦国, 吴劲, 等.基于PMF模型及地统计法的乐安河中上游地区土壤重金属来源解析[J]. 环境科学研究,2019,32(6):984-992. LI J, TENG Y G, WU J, et al. Source apportionment of soil heavy metal in the middle and upper reaches of Le'an River based on PMF model and geostatistics[J]. Research of Environmental Sciences,2019,32(6):984-992.
[25]	陈林, 马琨, 马建军, 等. 宁夏引黄灌区农田土壤重金属生态风险评价及来源解析[J/OL]. 环境科学, 2022: 1-19. [2023-01-02]. https://kns.cnki.net/kcms/detail/11.1895.X.20220525.1545.035.html. CHEN L, MA K, MA J J, et al. Risk assessment and sources of heavy metals in farmland soils of Yellow River irrigation area of Ningxia[J/OL]. Environmental Science, 2022: 1-19. [2023-01-02]. https://kns.cnki.net/kcms/detail/11.1895.X.20220525.1545.035.html.
[26]	魏迎辉, 李国琛, 王颜红, 等.PMF模型的影响因素考察: 以某铅锌矿周边农田土壤重金属源解析为例[J]. 农业环境科学学报,2018,37(11):2549-2559. WEI Y H, LI G C, WANG Y H, et al. Investigating factors influencing the PMF model: a case study of source apportionment of heavy metals in farmland soils near a lead-zinc ore[J]. Journal of Agro-Environment Science,2018,37(11):2549-2559.
[27]	WILDING L. Spatial variability: its documentation, accommodation and implication to soil surveys[C]//Soil spatial variability. Las Vegas, 1985: 166-194.
[28]	马宏宏, 余涛, 杨忠芳, 等.典型区土壤重金属空间插值方法与污染评价[J]. 环境科学,2018,39(10):4684-4693. MA H H, YU T, YANG Z F, et al. Spatial interpolation methods and pollution assessment of heavy metals of soil in typical areas[J]. Environmental Science,2018,39(10):4684-4693.
[29]	杜贯新, 闫百泉, 孙雨, 等.松嫩平原黑土区西北部阿荣旗黑土重金属分布特征、评价及预警[J]. 地质科学,2022,57(2):606-621. DU G X, YAN B Q, SUN Y, et al. Distribution characteristics, evaluation and early warning of heavy metals in Arongqi black soil in northwest of Songnen black soil region[J]. Chinese Journal of Geology (Scientia Geologica Sinica),2022,57(2):606-621.
[30]	米晓军, 任雯, 雒琼, 等.新疆准噶尔盆地未开垦盐碱地土壤重金属评价及其来源[J]. 干旱区研究,2019,36(4):824-834. MI X J, REN W, LUO Q, et al. Evaluation and their sources of heavy metals in uncultivated saline-alkaline soil in the Junggar Basin, Xinjiang[J]. Arid Zone Research,2019,36(4):824-834.
[31]	陈雪, 汪小祥, 刘敬青.小流域矿集区土壤重金属污染评价与来源综合解析[J]. 有色金属(矿山部分),2022,74(6):74-81. CHEN X, WANG X X, LIU J Q. Assessment and sources comprehensive identification of soil heavy metal pollution in small-scale drainage catchment of mining areas[J]. Nonferrous Metals (Mining Section),2022,74(6):74-81.
[32]	陈航, 王颖, 王澍.铜山矿区周边农田土壤重金属来源解析及污染评价[J]. 环境科学,2022,43(5):2719-2731. CHEN H, WANG Y, WANG S. Source analysis and pollution assessment of heavy metals in farmland soil around Tongshan mining area[J]. Environmental Science,2022,43(5):2719-2731.
[33]	杜立宇, 梁成华, 刘桂琴.红透山铜尾矿重金属分布及其对土壤重金属污染的影响[J]. 土壤通报,2008,39(4):938-941. doi: 10.19336/j.cnki.trtb.2008.04.054 DU L Y, LIANG C H, LIU G Q. The distribution characteristics of heavy mteals in Cu mine tailing and effect of heavy metals on pollution of soils in the areas of HongTou mountians[J]. Chinese Journal of Soil Science,2008,39(4):938-941. doi: 10.19336/j.cnki.trtb.2008.04.054
[34]	马杰, 张秀, 刘今朝, 等.某铅锌尾矿库周边土壤重金属污染特征及其来源分析[J]. 有色金属(冶炼部分),2022(6):101-109. MA J, ZHANG X, LIU J Z, et al. Pollution characteristics and source analysis of heavy metals in soils of a lead-zinc tailings pond[J]. Nonferrous Metals (Extractive Metallurgy),2022(6):101-109.
[35]	孙晶, 李伟, 吕学斌.土壤中汞和砷的环境效应、来源及影响因素[J]. 绿色科技,2020(14):148-151. SUN J, LI W, LÜ X B. Environmental effect, sources and influencing factors of mercury and arsenic in soil[J]. Journal of Green Science and Technology,2020(14):148-151.
[36]	黄华斌, 林承奇, 胡恭任, 等.基于PMF模型的九龙江流域农田土壤重金属来源解析[J]. 环境科学,2020,41(1):430-437. HUANG H B, LIN C Q, HU G R, et al. Source appointment of heavy metals in agricultural soils of the Jiulong River Basin based on positive matrix factorization[J]. Environmental Science,2020,41(1):430-437. □