Transfer of Heavy Metals from Soils to Vegetables and Associated Human Health Risks at Selected Sites in Pakistan

作     者：Zahir Ur REHMAN Sardar KHAN Mohammad Tahir SHAH Mark L.BRUSSEAU Said Akbar KHAN Jon MAINHAGU 

作者机构：Department of Environmental Sciences University of Peshawar School of Earth and Environmental Sciences University of Arizona National Centre of Excellence in Geology University of Peshawar 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2018年第28卷第4期

页      面：666-679页

核心收录：

学科分类：12[管理学] 083002[工学-环境工程] 1204[管理学-公共管理] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 082803[工学-农业生物环境与能源工程] 07[理学] 08[工学] 0828[工学-农业工程] 120405[管理学-土地资源管理] 0713[理学-生态学] 

基　　金：supported by the Directorate of Science and Technology, Khyber Pakhtunkhwa, Pakistan the Higher Education Commission, Islamabad, Pakistan supported by the NIEHS Superfund Research Program (No. ES04940) 

主　　题：contamination daily intake food crops metal accumulation metal pollution metal transfer factor risk index 

摘      要：Contamination of the food chain with heavy metals is considered as one of the major environmental pathways of human exposure to metals leading to potential health risks. This study aimed to investigate the concentrations of heavy metals such as copper （Cu）, zinc （Zn）, chromium （Cr）, nickel （Ni）, and manganese （Mn） in agricultural soils and food crops （fruit, leaf, and root vegetables）, and their associated health risks to the local population in selected southern districts of Khyber Pakhtunkhwa Province, Pakistan. The concentrations of the selected metals in soil varied over a wide range, in the following decreasing order： Mn 〉 Zn 〉 Cr 〉 Ni 〉 Cu. The bioaccunmlation of metals in vegetables was within the permissible risk limits, except for Cr which showed higher contamination in all the tested food crops. The trend of metal transfer factors for different vegetables was in the order of Cu 〉 Ni 〉 Cr 〉 Mn 〉 Zn, while the calculated daily intake of metals （DIM） in adults and children through consumption of food crops was in the decreasing order of Mn 〉 Zn 〉 Ni 〉 Cr 〉 Cu. The health risk index （HRI） values for the heavy metals for both adults and children were less than 1. Therefore, no significant health risk is anticipated for the local consumers through ingestion of these food crops.