Heavy metal pollution characteristics and health risk evaluation of soil around a tungsten-molybdenum mine in Luoyang, China

Heavy metal pollution in mining area soil and its impact on human health have been becoming one of the most important global environmental problems. This study investigated the heavy metals in the soil around the tungsten-molybdenum mining area in southwestern Luoyang, Henan Province, assessed the l...

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Veröffentlicht in:Environmental earth sciences 2021-04, Vol.80 (7), Article 293
Hauptverfasser: Hui, Wang, Hao, Zhang, Hongyan, Tang, Jiawei, Wen, Anna, Li
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Hao, Zhang
Hongyan, Tang
Jiawei, Wen
Anna, Li
description Heavy metal pollution in mining area soil and its impact on human health have been becoming one of the most important global environmental problems. This study investigated the heavy metals in the soil around the tungsten-molybdenum mining area in southwestern Luoyang, Henan Province, assessed the level of heavy metal pollution in the soil around the tungsten-molybdenum mining area, and quantified the risks of these pollutants to human health. To assess these potential threat levels, The pollution index, potential ecological hazards and health risk assessment methods recommended by the United States Environmental Protection Agency (USEPA) are applied. The results indicated that the average soil content of the heavy metals Zn, Cr, Cd and As exceeded the soil pollution risk screening value. The Nemerow comprehensive pollution index (PN) was greater than 3, which indicated severe pollution. The potential ecological risk index (RI) of each sampling point was integrated in the order RI # 7 > RI # 6 > RI # 5 > RI # 3 > RI # 4 > RI # 2  >  RI # 1 . Among the heavy metals, Cd posed the greatest ecological threat, accounting for 91.32% of RI. The effect of heavy metals in soil on the single non-carcinogenic health risk index (HQ) and non-carcinogenic total index (HI) through three exposure pathways, oral intake > skin contact > respiratory inhalation, was HQ Zn < HQ Cu < HQ Cd < HQ Pb < HQ Cr < 1 . The sum of HI Pb and HI Cr accounted for 92.96 and 92.98% of adults and children, respectively. In addition to the inhalation route CR Cd , CR Cr and CR Cd in the study area were higher than the maximum acceptable human-level recommended by the U.S. EPA (10 –6 ), and the CR and TCR were higher in children than in adults. Therefore, the heavy metal pollution of soils in the studied tungsten-molybdenum mine area was found to pose a serious threat to the surrounding ecological environment and residents’ health.
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Among the heavy metals, Cd posed the greatest ecological threat, accounting for 91.32% of RI. The effect of heavy metals in soil on the single non-carcinogenic health risk index (HQ) and non-carcinogenic total index (HI) through three exposure pathways, oral intake &gt; skin contact &gt; respiratory inhalation, was HQ Zn &lt; HQ Cu &lt; HQ Cd &lt; HQ Pb &lt; HQ Cr &lt; 1 . The sum of HI Pb and HI Cr accounted for 92.96 and 92.98% of adults and children, respectively. In addition to the inhalation route CR Cd , CR Cr and CR Cd in the study area were higher than the maximum acceptable human-level recommended by the U.S. EPA (10 –6 ), and the CR and TCR were higher in children than in adults. 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This study investigated the heavy metals in the soil around the tungsten-molybdenum mining area in southwestern Luoyang, Henan Province, assessed the level of heavy metal pollution in the soil around the tungsten-molybdenum mining area, and quantified the risks of these pollutants to human health. To assess these potential threat levels, The pollution index, potential ecological hazards and health risk assessment methods recommended by the United States Environmental Protection Agency (USEPA) are applied. The results indicated that the average soil content of the heavy metals Zn, Cr, Cd and As exceeded the soil pollution risk screening value. The Nemerow comprehensive pollution index (PN) was greater than 3, which indicated severe pollution. The potential ecological risk index (RI) of each sampling point was integrated in the order RI # 7 &gt; RI # 6 &gt; RI # 5 &gt; RI # 3 &gt; RI # 4 &gt; RI # 2  &gt;  RI # 1 . Among the heavy metals, Cd posed the greatest ecological threat, accounting for 91.32% of RI. The effect of heavy metals in soil on the single non-carcinogenic health risk index (HQ) and non-carcinogenic total index (HI) through three exposure pathways, oral intake &gt; skin contact &gt; respiratory inhalation, was HQ Zn &lt; HQ Cu &lt; HQ Cd &lt; HQ Pb &lt; HQ Cr &lt; 1 . The sum of HI Pb and HI Cr accounted for 92.96 and 92.98% of adults and children, respectively. In addition to the inhalation route CR Cd , CR Cr and CR Cd in the study area were higher than the maximum acceptable human-level recommended by the U.S. EPA (10 –6 ), and the CR and TCR were higher in children than in adults. Therefore, the heavy metal pollution of soils in the studied tungsten-molybdenum mine area was found to pose a serious threat to the surrounding ecological environment and residents’ health.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s12665-021-09539-0</doi><orcidid>https://orcid.org/0000-0003-2536-6319</orcidid></addata></record>
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subjects Adults
Biogeosciences
Cadmium
Carcinogens
Children
Chromium
Earth and Environmental Science
Earth Sciences
Ecological effects
Ecological risk assessment
Environmental impact
Environmental protection
Environmental risk
Environmental Science and Engineering
Geochemistry
Geology
Hazard assessment
Health hazards
Health risk assessment
Health risks
Heavy metals
Hydrology/Water Resources
Inhalation
Metals
Metals in soil
Mining
Molybdenum
Original Article
Pollutants
Pollution index
Respiration
Risk assessment
Soil
Soil investigations
Soil pollution
Terrestrial Pollution
Tungsten
Zinc
title Heavy metal pollution characteristics and health risk evaluation of soil around a tungsten-molybdenum mine in Luoyang, China
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