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Nanomaterials 2018, 8(10), 839; https://doi.org/10.3390/nano8100839

Effects of Copper Oxide Nanoparticles on Paddy Soil Properties and Components

1,2, 1,2, 1,2, 1,2 and 1,2,3,*
1
Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
2
MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Science, Zhejiang University, Hangzhou 310058, China
3
Zhejiang Bestwa EnviTech Company Limited, Hangzhou 310015, China
*
Author to whom correspondence should be addressed.
Received: 6 September 2018 / Revised: 11 October 2018 / Accepted: 13 October 2018 / Published: 16 October 2018
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Abstract

The wide use of metal-based nanoparticles (MNPs) will inevitably lead to their release into soil, and consequently affect the quality and ecological functions of soil environments. In this study, two paddy soils with different properties were exposed to CuO NPs to evaluate the transformation of CuO NPs and their effects on soil properties and components. The results of single chemical extraction and X-ray absorption fine structure analysis showed that CuO NPs could release Cu ions once being applied into the flooding paddy soil and then progress toward the more stable forms (Cu2S and Cu(OH)2). CuO NPs could change the soil properties by increasing the pH and Eh of the lower organic matter-soil rather than those of the higher organic matter-soil. Furthermore, we found that the 1000 mg/kg CuO NPs could accelerate the degradation or mineralization of the organic matter, as well as the Fe reduction process, by increasing the Fe(II) content by 293% after flooding for 60 days in the lower organic matter soil. The microbial biomass in both soils was severely inhibited by CuO NPs and the organic matter could partly mitigate the negative effects of CuO NPs. View Full-Text
Keywords: CuO nanoparticles; paddy soil; soil physicochemical properties; Cu form transformation CuO nanoparticles; paddy soil; soil physicochemical properties; Cu form transformation
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Shi, J.; Ye, J.; Fang, H.; Zhang, S.; Xu, C. Effects of Copper Oxide Nanoparticles on Paddy Soil Properties and Components. Nanomaterials 2018, 8, 839.

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