CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, People's Republic of China.
Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China.
Environ Sci Pollut Res Int. 2016 Nov;23(22):22443-22453. doi: 10.1007/s11356-016-7449-8. Epub 2016 Aug 22.
A verity of human activities i.e. urbanization and industrialization have been resulted serious environmental contaminations by heavy metals in all over the world. The settlement of populations in urban and nearby industrial areas for economic development has significant share in their exposure to these metallic contaminants. Depending on the nature and type of the pollutants, targeted urban-industrial environments can have harmful and chronic health risk impacts on exposed local inhabitants and may require detoxification, healing and remedial therapy. Consequently, environmental monitoring as well as human health risk assessments of urban environments under industrial influence are key dominant features. We believe this work will provide new insights into the studies of metals exposure and associated health risks in emerging industrials cities of developing countries. Present study aimed to study the bioavailability of metals, quantify the changeability in soil and vegetable metal concentrations and estimation of human health risks via dietary exposure, focusing on urban-industrial environment. Soil and vegetable samples were collected in six random sites within the urban, periurban and industrial areas and analyzed for metal concentrations. In addition, risk assessment model proposed by US-EPA was employed to estimate the potential health risk of heavy metals via dietary intake. Results indicated that the heavy metal concentrations were noteworthy in periurban and urban-industrial areas. However, contamination levels varied with the type of vegetable, and the point source pollution such as traffic, urban wastes and industrial effluent. According to the estimated THQ and HI values for non-carcinogenic risk, little or no negative impact of heavy metals was observed on local inhabitants. However, the concentrations of Cr, Cd, Pb and Ni were nearly closed to the permissible limits described by US-EPA in urban-industrial areas. Conclusively, some efficient remedial strategies should be focus to overcome the increasing levels of Cr, Cd, Pb and Ni in this study area to protect the health of local inhabitants.
各种人类活动，如城市化和工业化，已经导致全球范围内重金属的严重环境污染。为了经济发展，人口在城市和附近工业区的定居对他们接触这些金属污染物有很大的影响。根据污染物的性质和类型，目标城市-工业环境可能对暴露在其中的当地居民造成有害和慢性健康风险影响，可能需要进行解毒、治疗和补救治疗。因此，环境监测以及受工业影响的城市环境的人类健康风险评估是关键的主导特征。我们相信，这项工作将为研究发展中国家新兴工业城市的金属暴露和相关健康风险提供新的见解。本研究旨在研究金属的生物可利用性，量化土壤和蔬菜金属浓度的可变性，并通过饮食暴露评估人类健康风险，重点关注城市-工业环境。在城市、城郊和工业区的六个随机地点采集土壤和蔬菜样本，并分析金属浓度。此外，还采用了美国环保署提出的风险评估模型，通过饮食摄入来估计重金属的潜在健康风险。结果表明，城郊和城市工业区的重金属浓度值得关注。然而，污染水平随蔬菜类型和点源污染（如交通、城市废物和工业废水）而变化。根据非致癌风险的估计 THQ 和 HI 值，重金属对当地居民没有明显的负面影响。然而，Cr、Cd、Pb 和 Ni 的浓度接近美国环保署在城市工业区规定的允许限度。总之，应该关注一些有效的补救策略，以克服本研究区域中 Cr、Cd、Pb 和 Ni 浓度的不断增加，以保护当地居民的健康。
