Department of Environmental Health Engineering, Neyshabur University of Medical Sciences, Neyshabur, Iran.
Department of Environmental Health Engineering, School of Public Health, Social Development & Health Promotion Research Center, Gonabad University of Medical Sciences, Gonabad, Iran.
Biol Trace Elem Res. 2020 May;195(1):343-352. doi: 10.1007/s12011-019-01816-1. Epub 2019 Jul 18.
Heavy metal pollution of soils in industrial zones continues to attract attention because of its potential human health risks. The present research is an attempt to assess the pollution status of heavy metals including As, Cd, Cr, Ni, and Pb using various indices like contamination factor (CF), pollution index (I), and geo-accumulation index (I). In total, 60 surface soil samples were collected from four area (north, south, east, and west) in Khayyam industrial zone from depths of 10-20 cm. The results indicated that average metal concentration ranges (in mg/kg) observed in study soils were 8.84, 1.9, 37.66, 15.77, and 57.33 for As, Cd, Cr, Ni, and Pb, respectively. The concentrations of heavy metals As, Cr, Ni, and Pb with the exception of Cd in soils of southern areas of the industrial zone were higher. Cd concentration vary negligibly in sampling sites of north, south, east, and west. Based on the CF, I, and I indices, the pollution of soil in regard to concentration of heavy metals was in the following order: Cd > As > Pb > Ni > Zn. Industrial activities have therefore resulted in elevated concentrations of so in the soil environments in the Khayyam industrial zone. Based on the results of human health risk assessments, the soil metals pose negligible carcinogenic and non-carcinogenic risks to the adults and children living in this area. The need for the monitoring of the soil around the industrial zone, especially for Cd and As, is needed to reduce potential environmental issues.
工业区域土壤中的重金属污染因其潜在的人类健康风险而继续受到关注。本研究试图使用各种指标，如污染因子（CF）、污染指数（I）和地质累积指数（I）来评估包括 As、Cd、Cr、Ni 和 Pb 在内的重金属的污染状况。总共从 Khayyam 工业区的四个区域（北、南、东、西）采集了 60 个表层土壤样本，深度为 10-20 厘米。结果表明，在所研究的土壤中，金属平均浓度范围（mg/kg）分别为 8.84、1.9、37.66、15.77 和 57.33，用于 As、Cd、Cr、Ni 和 Pb。除 Cd 外，工业区南部地区土壤中 As、Cr、Ni 和 Pb 的重金属浓度较高。Cd 浓度在工业区北部、南部、东部和西部的采样点差异不大。根据 CF、I 和 I 指数，土壤中重金属的污染程度依次为：Cd > As > Pb > Ni > Zn。因此，工业活动导致 Khayyam 工业区土壤中重金属浓度升高。根据人类健康风险评估的结果，生活在该地区的成年人和儿童的土壤金属对致癌和非致癌风险可忽略不计。需要监测工业区周围的土壤，特别是 Cd 和 As，以减少潜在的环境问题。
