Functional Stability and Applicability of Heavy Metal Passivators in Reducing Cd Uptake by Lettuce

The use of heavy metal passivators to prevent vegetables from absorbing heavy metals is an important measure to control heavy metal-polluted vegetable fields and to ensure the safe production of vegetables. A pot experiment of planting three times in succession was conducted to study the effects of...

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Bibliographic Details
Published inHuanjing kexue Vol. 42; no. 5; p. 2502
Main Authors Pang, Fa-Hu, Wu, Xue-Jiao, Kong, Xue-Fei, Zeng, Chong, Wang, Xiao-Yu, Chen, Zhao-Jin, Yao, Lun-Guang, Han, Hui
Format Journal Article
LanguageChinese
Published China 08.05.2021
Subjects
Animals
Cadmium - analysis
Charcoal
Lactuca
Metals, Heavy - analysis
Sheep
Soil
Soil Pollutants - analysis
passivation remediation
heavy metal
comprehensive evaluation
functional stability
lettuce
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Summary:The use of heavy metal passivators to prevent vegetables from absorbing heavy metals is an important measure to control heavy metal-polluted vegetable fields and to ensure the safe production of vegetables. A pot experiment of planting three times in succession was conducted to study the effects of N3 (N3), rice husk biochar (BC), sheep manure organic fertilizer (SM), strain N3 combined with biochar (BC+N3), and strain N3 combined with sheep manure (SM+N3) on Cd uptake and the functional stability of lettuce using a heavy metal passivator only at the first planting. The comprehensive applicability of the passivation materials was evaluated by the dynamic weighted comprehensive function. The results showed that when lettuce was planted for the first time, compared with the control, all the heavy metal passivators could significantly reduce (61.2%-81%) the Cd content in the edible part of the lettuce. However, in the third cultivation of lettuce, only SM+N3 could significantly reduce the Cd uptake by lettuce, w
ISSN:0250-3301
DOI:10.13227/j.hjkx.202010080