Effects of mineral curing agents on absorption and enrichment of heavy metals in vegetables and pollution risk

doi:10.14088/j.cnki.issn0439-8114.2020.07.028

Abstract

Abstract: Taking heavy metal contaminated soil in Huzhou, Zhejiang province, as test soil, apply 1.0% and 2.5% of 4 kinds of mineral curing agents, zeolite, bentonite, diatomaceous earth and vermiculite, setting no added blank （CK） and base fertilizer added blank （FZ） for potting test, the effects of mineral curing agents on the growth, heavy metal content and enrichment characteristics of vegetables （Shanghai Green） were studied; and pollution assessment and health risk assessment of heavy metals were carried out. The results showed that the addition of mineral curing agent can effectively promote the growth of vegetables and reduce the heavy metal content in edible parts, and can reduce the absorption and accumulation of Cu, Zn, and Cd in the soil by vegetable roots and stems and leaves. After the addition of mineral curing agent, the comprehensive pollution level of heavy metals in vegetables can be reduced to mild pollution or alert level, and the health risk index has also decreased. With the addition of 2.5% vermiculite, the overall pollution level and health risk are the lowest. The addition of appropriate amount of mineral curing agent can promote the growth of vegetables in contaminated soil and control the pollution and health risks of heavy metals.

Key words: vegetable, heavy metals, pollution assessment, health risk evaluation

CLC Number:

SU Shi-bo, XU Hui-ting, JIA Fei, CHEN Huan-yuan, ZHANG Wei-wen, ZHANG Hang-jun, ZHU WEI-qin. Effects of mineral curing agents on absorption and enrichment of heavy metals in vegetables and pollution risk[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(7): 136-141.

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