|本期目录/Table of Contents|

[1]刘祖艳,焦菊英*,李建军,等.青海省典型农业区土壤重金属风险评价及来源[J].地球科学与环境学报,2024,46(06):816-831.[doi:10.19814/j.jese.2024.06029]
　LIU Zu-yan,JIAO Ju-ying*,LI Jian-jun,et al.Risk Assessment and Source of Soil Heavy Metals in the Typical Agricultural Areas of Qinghai Province, China[J].Journal of Earth Sciences and Environment,2024,46(06):816-831.[doi:10.19814/j.jese.2024.06029]
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青海省典型农业区土壤重金属风险评价及来源(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第46卷
期数:
2024年第06期
页码:
816-831
栏目:
环境与可持续发展
出版日期:
2024-12-15

文章信息/Info

Title:
Risk Assessment and Source of Soil Heavy Metals in the Typical Agricultural Areas of Qinghai Province, China
文章编号:
1672-6561(2024)06-0816-16
作者:
刘祖艳1; 2; 焦菊英1; 2*; 李建军1; 程玉卓2; 曹 雪2; 3; 陈同德1; 4; 章志鑫1; 5; 张鹤鑫2
(1. 西北农林科技大学 水土保持科学与工程学院(水土保持研究所)/黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西 杨凌 712100; 2. 中国科学院/水利部水土保持研究所,陕西 杨凌 712100; 3. 西华师范大学 地理科学学院,四川 南充 637009; 4. 青海民族大学 政治与公共管理学院,青海 西宁 810007; 5. 察隅县人力资源和社会保障局,西藏 察隅 860600)
Author(s):
LIU Zu-yan1; 2;  JIAO Ju-ying1; 2*;  LI Jian-jun1;  CHENG Yu-zhuo2;  CAO Xue2; 3;  CHEN Tong-de1; 4;  ZHANG Zhi-xin1; 5;  ZHANG He-xin2
(1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau/College of Soil and Water Conservation Science and Engineering(Institute of Soil and Water Conservation), Northwest A&F University, Yangling 712100, Shaanxi, China; 2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, Shaanxi, China; 3. School of Geographical Sciences, China West Normal University, Nanchong 637009, Sichuan, China; 4. School of Politics and Public Administration, Qinghai Minzu University, Xining 810007, Qinghai, China; 5. Chayu Human Resources and Social Security Bureau, Chayu 860600, Xizang, China)
关键词:
土壤重金属;  耕地;  污染程度;  潜在生态风险;  主成分分析;  来源分析;  青海
Keywords:
soil heavy metal;  cultivated land;  pollution degree;  potential ecological risk;  principal component analysis;  source analysis;  Qinghai
分类号:
X53
DOI:
10.19814/j.jese.2024.06029
文献标志码:
A
摘要:
探究青海省耕地土壤重金属的累积状况、污染风险与来源,可为青海省耕地土壤重金属治理与防控提供科学依据。以河湟谷地和柴达木盆地耕地土壤为研究对象,采集了84个耕地表层(0～20 cm)土壤样品,测定了Cu、Pb、Cr、Zn和Cd含量,利用单因子污染指数法、地累积指数法、内梅罗综合指数法和潜在生态风险指数法对研究区土壤重金属的污染程度及生态风险进行了评价,并采用相关性分析和主成分分析方法对耕地土壤重金属的来源进行了识别。结果表明:①相较于青海省土壤环境背景值,河湟谷地与柴达木盆地耕地土壤仅有Cd平均含量高于背景值,但所有土壤样品均未超过农用地土壤污染风险筛选值; 在两个区域,Cd含量的变异性均最高,分别达到40.87%和40.07%,其他4种重金属的变异系数均低于30.00%; Cu、Pb和Zn含量在两个区域无显著差异,Cr含量在河湟谷地显著高于柴达木盆地,但Cd含量显著低于柴达木盆地。②两个区域耕地土壤污染程度整体上处于清洁水平,综合潜在生态风险为低生态风险水平,但Cd潜在生态风险较高,在两个区域均达到中等生态风险水平。③河湟谷地Cu、Zn和Cd主要受农业活动的影响,Pb和Cr主要受土壤母质的影响; 柴达木盆地Cu和Zn主要受母质矿物风化和土壤侵蚀的影响,Pb、Cr和Cd主要受农业生产和管理的影响。综上所述,尽管5种重金属在青海农业区土壤中暂未对农作物质量和人体健康构成威胁,但人类活动对土壤重金属累积的影响不容忽视,特别要关注农用肥料的施用对Cd累积的影响,以预防耕地土壤污染。
Abstract:
The accumulation of heavy metals in soil not only causes serious ecological and environmental problems, but also migrates to the human body through the food chain, posing a direct or indirect threat to human health. In order to understand the status of heavy metal pollution in cultivated soil in Qinghai province and promote the healthy development of local agriculture, the cultivated soil in Hehuang Valley and Qaidam Basin were taken as the research object. A total of 84 samples of cultivated soil(0-20 cm)were collected, and the soil pH and the contents of five heavy metal elements, including Cu, Pb, Cr, Zn and Cd, were determined. Single factor pollution index, geo-accumulation index, Nemerow comprehensive pollution index and potential ecological risk index were used to evaluate the heavy metal pollution degree and ecological risk of the surface soil in the study area. Correlation analysis and principal component analysis were used to identify the sources of five heavy metals in cultivated soil. The results show that ① compared with the soil environmental background value of Qinghai province, only the average content of Cd in the cultivated soil of Hehuang Valley and Qaidam Basin is higher than the background value, but all the samples do not exceed the screening value of soil pollution risk of agricultural land; in Hehuang Valley and Qaidam Basin, the coefficient of variation of Cd content is the highest, reaching 40.87% and 40.07%, respectively, and the other four heavy metals are all lower than 30.00%; the contents of Cu, Pb and Zn are not significantly different between the two areas, the content of Cr in Hehuang Valley is significantly higher than that in Qaidam Basin, but the content of Cd is significantly lower than that in Qaidam Basin. ② According to Nemerow comprehensive pollution index and comprehensive potential ecological risk evaluation, the cultivated soil in Hehuang Valley and Qaidam Basin is at a clean level, and the comprehensive potential ecological risk is low; according to the single potential ecological risk index, the potential ecological risk of Cd is high and reaches the medium risk level in the two areas, which is the main heavy metal element constituting the potential ecological risk of cultivated soil. ③ In Hehuang Valley, Cu, Zn and Cd are mainly affected by agricultural activities such as fertilizer application and pesticides, while Pb and Cr are mainly affected by soil parent material; in Qaidam Basin, Cu and Zn are mainly affected by the weathering of parent minerals and soil erosion, while Pb, Cr and Cd are mainly affected by agricultural production and management. In summary, although the five heavy metals in the cultivated soil of Hehuang Valley and Qaidam Basin do not pose a threat to the quality of crops and human health, the impact of human activities on the accumulation of heavy metals in soil cannot be ignored, especially the impact of the use of agricultural fertilizer on the accumulation of Cd, so as to prevent soil pollution in cultivated land.

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备注/Memo

备注/Memo:
收稿日期:2024-06-21; 修回日期:2024-10-07
基金项目:第二次青藏高原综合科学考察研究项目(2019QZKK0603); 中国科学院战略性先导科技专项项目(XDA20040202)
*通信作者:焦菊英(1965-),女,陕西宝鸡人,研究员,博士研究生导师,工学博士,E-mail:jyjiao@ms.iswc.ac.cn。
更新日期/Last Update: 2024-12-15