Differences in absorption of cadmium and lead among fourteen sweet potato cultivars and health risk assessment

Fang Huang; Hong Zhou; Jiaofeng Gu; Canyang Liu; Wenjun Yang; Bohan Liao; Hang Zhou

doi:10.1016/j.ecoenv.2020.111012

Differences in absorption of cadmium and lead among fourteen sweet potato cultivars and health risk assessment

Ecotoxicol Environ Saf. 2020 Oct 15:203:111012. doi: 10.1016/j.ecoenv.2020.111012. Epub 2020 Jul 15.

Authors

Fang Huang¹, Hong Zhou², Jiaofeng Gu³, Canyang Liu⁴, Wenjun Yang⁵, Bohan Liao⁶, Hang Zhou⁷

Affiliations

¹ College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China. Electronic address: 2910425487@qq.com.
² Crop Research Institute, Hunan Academy of Agricultural Sciences, Changsha, 410125, China. Electronic address: zhouhong750804@sina.com.
³ College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China. Electronic address: gujiaofeng@csuft.edu.cn.
⁴ College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China. Electronic address: 742889820@qq.com.
⁵ College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China. Electronic address: 646309109@qq.com.
⁶ College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China. Electronic address: liaobohan@csuft.edu.cn.
⁷ College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China. Electronic address: zhouhang4607@csuft.edu.cn.

PMID: 32684522
DOI: 10.1016/j.ecoenv.2020.111012

Abstract

Planting sweet potato (Ipomoea batatas (L.) Lam.) instead of rice in the area contaminated with heavy metals is one of the measures to ensure people's health and agricultural economy. Therefore, it is important to screen the low accumulation cultivars of sweet potato and to find out the concentration rule of cadmium (Cd) and lead (Pb) in edible parts along with the associated health risks to humans. A field experiment was performed with fourteen of three main types (starch, purple, and edible-type) of sweet potato cultivars grown on farmland polluted with Cd and Pb in eastern Hunan Province, China. The Cd and Pb concentrations in the sweet potato tissues as well as the yield were measured. The yield of the shoot and tuberous root of the fourteen sweet potato cultivars ranged from 14.59 to 68.57 and 26.35-50.76 t ha^-1 with mean values of 33.09 and 33.46 t ha^-1, respectively. Compared with purple and edible-type cultivars, the starch-type cultivar had lower Cd and Pb concentrations in the flesh, but higher in the shoot. The Cd and Pb concentrations in the flesh of cultivars Shangshu 19, Sushu 24, Yushu 98, and Xiangshu 98 were lower than MCL provided in Chinese National Food Safety Standards GB2762-2017. Based on the hazard index (HI), the consumption of sweet potato flesh is lower health risk, while shoots pose a greater health risk to local people and Cd is the main cause of the risk. As a result, sweet potato cultivars Shangshu 19, Sushu 24, Yushu 98 and Xiangshu 98 can be plant in serve Cd and Pb contaminated soils with the advantages of easy cultivation, high yield and economic benefits without stopping agricultural production.

Keywords: Cadmium; Cultivar; Health risk; Lead; Safe production; Sweet potato.

MeSH terms

Cadmium / analysis*
China
Crops, Agricultural / chemistry
Crops, Agricultural / genetics
Dietary Exposure / analysis*
Dietary Exposure / standards
Food Safety
Humans
Ipomoea batatas / chemistry*
Ipomoea batatas / genetics
Lead / analysis*
Risk Assessment
Soil Pollutants / analysis*

Substances

Soil Pollutants
Cadmium
Lead