TITLE:
Effect of Polyethylene (LDPE) Microplastic on Remediation of Cadmium Contaminated Soil by Solanum nigrum L.
AUTHORS:
Jiying Zou, Chenyu Wang, Jianwei Li, Jia Wei, Ying Liu, Liangyu Hu, Hui Liu, Hongfeng Bian, Dazhi Sun
KEYWORDS:
Microplastics, Heavy Metal, Compound Pollution, Phytoremediation, Solanum nigrum L.
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.10 No.1,
January
13,
2022
ABSTRACT: Solanum nigrum L. has a delightful prospect as a hyperaccumulation
plant for cadmium pollution remediation, and microplastic is a new type of
pollution that has received wide attention. In this study, the effects of
polyethylene microplastics (LDPE) (0.135, 0.27, 0.81 and 1.35 mg·kg-1)
and cadmium (20 mg·kg-1) on the growth indexes and soil physical and
chemical properties of Solanum nigrum L. were investigated in a 17-day
microcosm experiment. The results showed that single LDPE contamination showed
a trend of low concentration promotion and medium-high concentration inhibited
the growth index of Solanum nigrum L. and soil physicochemical index,
and single Cd contamination was more stressful to plants than single LDPE
contamination, while low concentration of LDPE could reduce the effect of Cd on
soil physical and chemical properties and promote plant growth and uptake of
soil nutrients. These findings suggest that high concentrations of
microplastics can inhibit the growth of Solanum nigrum L. alone or in
combination with Cd, rather than reducing the toxicity of Cd.