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| Accumulation of heavy metals copper, zinc, and cadmium in cassava varieties and the associated human health risk |
| Received:January 13, 2017 |
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| KeyWord:cassava(Manihot esculenta) cultivar;soil heavy metal;copper;zinc;cadmium;phytoremediation;human health risk analysis |
| Author Name | Affiliation | E-mail | | ZENG Lu-ping | Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China
Ministry of Agriculture Key Laboratory of Agro-Environment in the Tropics, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, South China Agricultural University, Guangzhou 510642, China | | | QIN Jun-hao | Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China
Ministry of Agriculture Key Laboratory of Agro-Environment in the Tropics, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, South China Agricultural University, Guangzhou 510642, China | | | DONG Shu-yu | Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China
Ministry of Agriculture Key Laboratory of Agro-Environment in the Tropics, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, South China Agricultural University, Guangzhou 510642, China | | | ZHANG Run-han | Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China
Ministry of Agriculture Key Laboratory of Agro-Environment in the Tropics, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, South China Agricultural University, Guangzhou 510642, China | | | LI Hua-shou | Institute of Tropical and Subtropical Ecology, South China Agricultural University, Guangzhou 510642, China
Ministry of Agriculture Key Laboratory of Agro-Environment in the Tropics, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, South China Agricultural University, Guangzhou 510642, China | lihuashou@scau.edu.cn |
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| Abstract: |
| Cassava(Manihot esculenta) has great potential for bioremediation of contaminated soil and utilization as an energy plant. Three cassava varieties(SC5, SC205, and SC8) were selected to investigate the differences in their accumulation of heavy metals copper(Cu), zinc(Zn), and cadmium(Cd) and to perform human health risk assessments through field plot experiments. The results showed that SC8 had the highest yield among the three cassava cultivars, at up to 53 125 kg·hm-2 at the sample site Ningxi. The concentrations of Cu, Zn, and Cd in the three cassava varieties were all ranked in the order stem > leaf > root. The total enrichment coefficient of SC8 was much higher than that of the other two cassava cultivars, with Cu of 4.30, Zn of 2.86, and Cd of 2.80. It may be important to promote planting of cassava variety SC8 in moderately polluted soil. Furthermore, the result of target hazard quotient(THQ) analyses showed that adults and children who consume cassava tubers and roots from the Ningxi plots had potential health risks due to heavy metal contamination. |
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