Assessing the Impact of Iron-based Nanoparticles on pH,Dissolved Organic Carbon,and Nutrient Availability in Soils |
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| Authors: | Dong-Mei Zhou Sheng-Yang Jin Yu-Jun Wang Peng Wang Nan-Yang Weng Yu Wang |
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| Affiliation: | 1. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science , Chinese Academy of Sciences , Nanjing , China;2. Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science , Chinese Academy of Sciences , Nanjing , China;3. Graduate University of Chinese Academy of Sciences , Beijing , China |
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| Abstract: | With the ongoing commercialization of nanotechnology products, the increasing use of engineered nanoparticles (NPs) could lead potentially to environmental risks. This study investigated the dynamic influences of three iron-based NPs (Fe0, Fe3O4, and Fe2O3) applied into a red soil (RS) and a Wushan soil (WS) with different application rates (2 to 6 g kg?1) on soil physicochemical properties such as pH, dissolved organic carbon (DOC), available ammonium nitrogen (NH4 +-N), available phosphorus (AP), and enzymatic activities. The results showed that the addition of Fe0 NPs increased DOC and available NH4 +-N, but significantly decreased AP, while Fe3O4 and Fe2O3 NPs slightly reduced soil pH in both soils and significantly declined available NH4 +-N in the WS and AP in the RS. No significant difference was observed between the effects of Fe3O4 and Fe2O3 NPs on soil properties except AP in the RS. All iron-based NPs decreased the activities of urease and acid phosphatase in both soils. The effects on soil physicochemical properties, especially available NH4 +-N and AP induced by iron-based NPs, varied greatly with soil types. These results implied that cautions should be paid for the environmental application of iron-based NPs, especially iron oxide NPs in soils. |
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| Keywords: | Soil iron nanoparticle nutrients physicochemical properties of soils |
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