Accumulation and Risk Assessment of Heavy Metals in Vegetables in Wastewater Irrigation Areas
Concentrations of selected heavy metals (Cd, Cu, Pb, Cr and Zn) were determined in vegetables (radish, tomato, gourd, celery, lettuce, Chinese lettuce, Garland chrysanthemum, rape, Chinese cabbage, Sonchus) from the wastewater irrigation area in Tianjin, China. Cd contents in the edible parts were not significantly different among all vegetables. Zn concentration in the leafy vegetables was the highest of all the heavy metals. The metal contents in the vegetables were compared with the Chinese national standards for food quality. The contaminant index of Cr, Pb, Cd and Zn varied respectively between from 11.96 to 22.26, from 5.36 to 14.43, from 0.95 to 15.4 and from 0 to 4.06. Although Cu content of the vegetables except lettuce was lower the permitted standard, the results indicated these vegetables could not be regarded as safety for human consumption.
Zhao Junying Jin Xinglong Shen Zhaoli Guo Huaming
School of Water Resources and Environmental Science, China University of Geosciences,Beijing, 100083 School of Environmental Science and Safety Engineering, Tianjin University of Technology,Tianjin,300 School of Water Resources and Environmental Science, China University of Geosciences,Beijing, 100083 School of Water Resources and Environmental Science,China University of Geosciences,Beijing,100083,
国际会议
哈尔滨
英文
527-531
2011-03-26（万方平台首次上网日期，不代表论文的发表时间）