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The mobility of cadmium and lead in the soil-mulberry-silkworm system.

Authors
  • Jiang, Yongbing1
  • Jiang, Shimeng2
  • Yan, Xinpei2
  • Qin, Zhixiong2
  • Jia, Chaohua2
  • Li, Zhangbao2
  • Zhang, Jun2
  • Huang, Renzhi3
  • 1 The Sericultural Research Institute of Hunan Province, Changsha, 410127, PR China. Electronic address: [email protected] , (China)
  • 2 The Sericultural Research Institute of Hunan Province, Changsha, 410127, PR China. , (China)
  • 3 The Sericultural Research Institute of Hunan Province, Changsha, 410127, PR China. Electronic address: [email protected] , (China)
Type
Published Article
Journal
Chemosphere
Publication Date
Mar 01, 2020
Volume
242
Pages
125179–125179
Identifiers
DOI: 10.1016/j.chemosphere.2019.125179
PMID: 31677517
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Evaluation of the transportation of heavy metals in food chain has received a great deal of attention. In this study, the mobility of cadmium (Cd) and lead (Pb) in soil-mulberry-silkworm system was assessed. The results showed that bioconcentration factors for Cd and Pb were lower than 1 for all the three mulberry cultivars. Higher translocation factors (TFs) were observed in the levels from branch to leaf, larvae to excrement. The BCFs of Pb in root and silkworm excrement were higher than those in the other parts. Meanwhile, most of Cd accumulated from soils located in the root (48.00-54.40%) and only about 10% was in the leaf. But the Cd and Pb had significant effects on the ratios of cocoon shell with Yuesang 11 under different planting densities. For Yuesang 11 and Qiangsang 1, the Pb percentages were roots > branches > leaves > stems. The rates of ingestion (IR) and digestion (DR) were a little higher than those in the control at first and then decreased gradually with time. The IR reached the lowest values on 8th day while the DR arrived at the highest. Planting mulberry and raising silkworm could be a reasonable method for the utilization of heavy metal contaminated paddy soils. Copyright © 2019 Elsevier Ltd. All rights reserved.

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