College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi, Xinjiang, China.
Research Center of Electrochemical Technology and Applied Engineering, Xinjiang Normal University, Urumqi, China.
Bull Environ Contam Toxicol. 2023 Feb 21;110(3):58. doi: 10.1007/s00128-022-03674-5.
It is essential to understand the occurrence from and plant bioavailability of soil microplastics to heavy metals in soils to assess their environmental fate and risk. The purpose of this study was to evaluate the effect of different microplastic concentrations on the bioavailability of copper and zinc in soil. The relationship between the availability of heavy metals in soil assessed by chemical methods (soil fractionation) and the bioavailability of copper and zinc assessed by biological methods (accumulation in maize and cucumber leaves) in relation to the concentration of microplastics. The results showed that copper and zinc in soil shifted from stable to effective fraction with increasing polystyrene concentrations, which would increase the toxicity and bioavailability of heavy metals. When the concentration of polystyrene microplastics increased, copper and zinc accumulation in plants increased, chlorophyll a and chlorophyll b decreased, and malondialdehyde increased. It is shown that the addition of polystyrene microplastics promoted the toxicity of copper and zinc and inhibited plant growth.
了解土壤中微塑料对重金属的来源和植物生物有效性对于评估其环境归宿和风险至关重要。本研究旨在评估不同浓度微塑料对土壤中铜和锌生物有效性的影响。通过化学方法（土壤分馏）评估土壤中重金属的有效性与通过生物方法（玉米和黄瓜叶片中的积累）评估铜和锌的生物有效性与微塑料浓度之间的关系。结果表明，随着聚苯乙烯浓度的增加，土壤中的铜和锌从稳定态向有效态转移，这将增加重金属的毒性和生物有效性。当聚苯乙烯微塑料浓度增加时，植物对铜和锌的积累增加，叶绿素 a 和叶绿素 b 减少，丙二醛增加。结果表明，添加聚苯乙烯微塑料会促进铜和锌的毒性，并抑制植物生长。
