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International journal of environmental research and public health
04 05, 2020;17 (7):

Effect of Metal Oxide Nanoparticles on the Chemical Speciation of Heavy Metals and Micronutrient Bioavailability in Paddy Soil.

Wei Zhang, Jinghua Long, Jie Li, Meng Zhang, Xingyin Ye, Wenjing Chang, Hui Zeng
Author Information
  1. Wei Zhang: School of Urban Planning and Design, Peking University Shenzhen Graduate School, Shenzhen 518055, China. ORCID
  2. Jinghua Long: School of Public Administration, Hebei University of Economics and Business, Shijiazhuang 050061, China.
  3. Jie Li: College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China.
  4. Meng Zhang: School of Urban Planning and Design, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
  5. Xingyin Ye: School of Urban Planning and Design, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
  6. Wenjing Chang: School of Urban Planning and Design, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
  7. Hui Zeng: School of Urban Planning and Design, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
PMID: 32260493 DOI: 10.3390/ijerph17072482

Abstract

The effects of engineered nanoparticles (ENPs) on heavy metal fate and biotoxicity in farmland soil are mostly unknown. A flooding-drying simulation experiment was conducted to study the effects of three typical metal oxide nanoparticles (TiO-NPs, ZnO-NPs and CuO-NPs) on the chemical speciation of heavy metals and micronutrient bioavailability in paddy soil. The results showed that the addition of ZnO-NPs and CuO-NPs caused significant increases in soil pH, Eh and EC after a 90-d flooding-drying process. ZnO-NPs and CuO-NPs addition caused clearly increase in the Zn and Cu concentrations in the acid-soluble fraction, Fe/Mn oxides-bound fraction and organic-bound fraction, leading to higher bioavailability in the soil. DTPA-extractable Zn and Cu increased to 184.6 mg kg and 145.3 mg kg in the maximum ZnO-NPs and CuO-NPs concentration treatments (500 mg kg). TiO-NPs promoted the transformation of Mn from a Fe/Mn oxides-bound fraction to an acid-soluble fraction. Soil Cd bioavailability obviously decreased in the TiO-NPs treatment but increased in the ZnO-NPs and CuO-NPs treatments.

Keywords

bioavailability heavy metal metal oxide nanoparticles paddy soil

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MeSH Term

Biological Availability
Metal Nanoparticles
Metals, Heavy
Micronutrients
Oxides
Soil
Soil Pollutants

Chemicals

Metals, Heavy
Micronutrients
Oxides
Soil
Soil Pollutants
Journal Article Research Support, Non-U.S. Gov't

Word Cloud

Created with Highcharts 10.0.0soilZnO-NPsCuO-NPsfractionmetalbioavailabilitynanoparticlesheavyTiO-NPsmgkgeffectsflooding-dryingoxidepaddyadditioncausedZnCuacid-solubleFe/Mnoxides-boundincreasedtreatmentsSoilengineeredENPsfatebiotoxicityfarmlandmostlyunknownsimulationexperimentconductedstudythreetypicalchemicalspeciationmetalsmicronutrientresultsshowedsignificantincreasespHEhEC90-dprocessclearlyincreaseconcentrationsorganic-boundleadinghigherDTPA-extractable18461453maximumconcentration500promotedtransformationMnCdobviouslydecreasedtreatmentEffectMetalOxideNanoparticlesChemicalSpeciationHeavyMetalsMicronutrientBioavailabilityPaddy

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