INVESTIGATION AND CLASSIFICATION OF HEAVY METALS IN AGRICULTURAL LAND IN A LEAD-ZINC MINING AREA IN HUBEI PROVINCE

ZHANG Yao; SUN Gang; WANG Qi; LING Haibo; HU Nan

doi:10.13205/j.hjgc.202202022

Volume 40 Issue 2

Apr. 2022

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ZHANG Yao, SUN Gang, WANG Qi, LING Haibo, HU Nan. INVESTIGATION AND CLASSIFICATION OF HEAVY METALS IN AGRICULTURAL LAND IN A LEAD-ZINC MINING AREA IN HUBEI PROVINCE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 139-145,205. doi: 10.13205/j.hjgc.202202022

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ZHANG Yao, SUN Gang, WANG Qi, LING Haibo, HU Nan. INVESTIGATION AND CLASSIFICATION OF HEAVY METALS IN AGRICULTURAL LAND IN A LEAD-ZINC MINING AREA IN HUBEI PROVINCE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(2): 139-145,205. doi: 10.13205/j.hjgc.202202022

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INVESTIGATION AND CLASSIFICATION OF HEAVY METALS IN AGRICULTURAL LAND IN A LEAD-ZINC MINING AREA IN HUBEI PROVINCE

doi: 10.13205/j.hjgc.202202022

State Key Laboratory of Soil Health Diagnosis and Green Remediation for Environmental Protection, Provincial Ecology & Environment Engineering Evaluation Center, Hubei Academy of Environmental Science, Wuhan 430072, China

Received Date: 2021-02-05
Available Online: 2022-04-02
Publish Date: 2022-04-02

Abstract

Abstract

The soil of 147.3 hm² agricultural land in a lead-zinc mining area in Southeast Hubei Province was studied, through field sampling and laboratory test. The contents of heavy metals Cu, Cr, Ni, Zn, Pb, Cd, As and Hg in soil were evaluated. The results showed that: The over-standard rates of Cu, Zn, Pb, Cd and As were 33.7%, 49.0%, 73.5%, 95.9% and 85.7%, respectively. The order of single factor pollution index was Cd>As>Pb>Zn>Cu; through the Nemerow Comprehensive Pollution Index evaluation, the proportion of severe pollution, moderate pollution and slight pollution was 59.18%, 12.24% and 27.55%, respectively. Through the comprehensive index combined soil environmental quality and agricultural products quality, most of the soil of agricultural land in the lead-zinc mining area was heavily polluted(IICQ_S>5), which was consistent with the regional distribution of Pb, Cd and As. However, most of the agricultural products were clean or slightly polluted(IICQ_AP<2), and there was no obvious law in distribution of the over-standard points. There was no significant correlation between IICQs and IICQap. The distribution of IICQ value and IICQs value was consistent. Average IICQ of agricultural land in the study area was 7.84, which was heavily polluted. Combined with field investigation and data analysis, the conceptual model of soil pollution in the lead-zinc mining area was preliminarily conceived. According to Technical Guide for the Classification of Soil Environmental Quality of Agricultural Land, combined with the survey result on agricultural products, the cultivated land in the agricultural land in the lead-zinc mining area was divided into priority protection type Ⅱ(21.4 hm²), safe use type Ⅰ(57.8 hm²), safe use type wasteland(29 hm²), safe use type Ⅱ(1.2 hm²) and strict control type(37.9 hm²).
- mining area,
- agricultural land,
- soil,
- agricultural products,
- heavy metal pollution,
- pollution source,
- soil classification

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References(24)

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