Bioavailability and Toxicity of nano Copper Oxide to Pakchoi (Brassica Campestris L.) as Compared with bulk Copper Oxide and Ionic Copper

IF 2.7 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Bulletin of Environmental Contamination and Toxicology Pub Date : 2024-04-02 DOI:10.1007/s00128-024-03882-1

Yuqing Zhang, Helian Li, Yanhua Qiu, Yinghao Liu

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引用次数: 0

Abstract

The increasing use of copper oxide nano particles (nCuO) as nano-fertilizers and pesticides have raised concerns over their impact on soil environment and agricultural products. In this study, two nCuO with different shapes, namely spherical nCuO (CuO NPs) and tubular nCuO (CuO NTs), were selected to investigate their bioavailability and toxicity to pakchoi in two soils with different properties. At the meantime, CuO bulk particles (CuO BPs) and Cu(NO₃)₂ were used for comparison. Results showed that all the Cu treatments increased the DTPA extractable (DTPA-Cu) concentrations in GD soil (acidic) more than in HN soil (alkaline). The DTPA-Cu concentrations increased in the order of Cu(NO₃)₂ ≈ CuO NPs > CuO BPs ≈ CuO NTs in GD soil and Cu(NO₃)₂ > CuO NPs > CuO BPs ≈ CuO NTs in HN soil. While for the contents of Cu in the aerial parts of pakchoi, the order is CuO NPs > Cu(NO₃)₂ > CuO NTs ≈ CuO BPs in GD soil and CuO NPs ≈ Cu(NO₃)₂ > CuO BPs ≈ CuO NTs in HN soil. Only CuO NPs reduced pakchoi biomass in GD soil. There are no significant difference among CuO NPs, CuO BPs, and Cu(NO₃)₂ in reducing the chlorophyll contents in pakchoi in HN soil, whereas in GD soil, CuO NPs and CuO BPs led to significantly lower chlorophyll contents in pakchoi compared to Cu(NO₃)₂. Additionally, CuO NPs and Cu(NO₃)₂ increased Mn and Mo in pakchoi leaf in HN soil, while increased Zn in pakchoi leaf in GD soil. These results indicated that CuO NPs showed higher or comparable toxicity and bioavailability to pakchoi compared with Cu(NO₃)₂ depending on soil properties, and nCuO are more easily to be transferred from roots to the aerial parts than CuO BPs and Cu(NO₃)₂.

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纳米氧化铜与块状氧化铜和离子铜的生物利用率及对白菜的毒性比较

氧化铜纳米颗粒（nCuO）作为纳米肥料和杀虫剂的使用日益增多，引起了人们对其对土壤环境和农产品影响的关注。本研究选择了两种不同形状的 nCuO，即球形 nCuO（CuO NPs）和管状 nCuO（CuO NTs），以研究它们在两种不同性质土壤中的生物利用率和对椿树的毒性。同时，还使用了氧化铜散粒（CuO BPs）和 Cu（NO3）2 进行比较。结果表明，与 HN 土壤（碱性）相比，所有铜处理方法都会增加 GD 土壤（酸性）中的 DTPA 可提取物（DTPA-Cu）浓度。在广东土壤中，DTPA-Cu 浓度的增加顺序是 Cu(NO3)2 ≈ CuO NPs > CuO BPs ≈ CuO NTs；在湖南土壤中，Cu(NO3)2 > CuO NPs > CuO BPs ≈ CuO NTs。而在广东土壤中，椿树气生部分的铜含量顺序为 CuO NPs > Cu(NO3)2 > CuO NTs ≈ CuO BPs，在湖南土壤中，CuO NPs ≈ Cu(NO3)2 > CuO BPs ≈ CuO NTs。在广东土壤中，只有 CuO NPs 能减少椿树的生物量。在 HN 土壤中，CuO NPs、CuO BPs 和 Cu（NO3）2 在降低椿树叶绿素含量方面没有明显差异；而在 GD 土壤中，CuO NPs 和 CuO BPs 与 Cu（NO3）2 相比，能显著降低椿树叶绿素含量。此外，在 HN 土壤中，CuO NPs 和 Cu（NO3）2 增加了白花蛇舌草叶片中的锰和钼，而在 GD 土壤中则增加了白花蛇舌草叶片中的锌。这些结果表明，与 Cu（NO3）2 相比，CuO NPs 对百日草的毒性和生物利用度更高或相当，这取决于土壤的性质，而且与 CuO BPs 和 Cu（NO3）2 相比，nCuO 更容易从根部转移到气生部分。

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来源期刊

Bulletin of Environmental Contamination and Toxicology 环境科学-毒理学

CiteScore

5.60

自引率

3.70%

发文量

230

审稿时长

1.7 months

期刊介绍： The Bulletin of Environmental Contamination and Toxicology(BECT) is a peer-reviewed journal that offers rapid review and publication. Accepted submissions will be presented as clear, concise reports of current research for a readership concerned with environmental contamination and toxicology. Scientific quality and clarity are paramount.