The effect of Fenton reaction using H2O2 and water control on the distribution and accumulation of As speciation within the soil-rice system

Shaorui Wang; Qiaowen Li; William A Stubbings; Lili Li; Junhao Qin; Huashou Li

doi:10.1016/j.chemosphere.2021.129633

The effect of Fenton reaction using H₂O₂ and water control on the distribution and accumulation of As speciation within the soil-rice system

Chemosphere. 2021 Jul:274:129633. doi: 10.1016/j.chemosphere.2021.129633. Epub 2021 Jan 25.

Authors

Shaorui Wang¹, Qiaowen Li², William A Stubbings³, Lili Li⁴, Junhao Qin², Huashou Li⁵

Affiliations

¹ Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou, 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou, 510650, China.
² College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China; Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture/Key Laboratory of Agroecology and Rural Environment of Guangzhou Regular Higher Education Institutions, Guangzhou, 510642, China.
³ School of Geography, Earth, & Environmental Sciences, University of Birmingham, Birmingham, B15 2TT, UK.
⁴ School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China.
⁵ College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China; Guangdong Engineering Research Center for Modern Eco-agriculture and Circular Agriculture/Key Laboratory of Agroecology and Rural Environment of Guangzhou Regular Higher Education Institutions, Guangzhou, 510642, China. Electronic address: lihuashou@scau.edu.cn.

PMID: 33529960
DOI: 10.1016/j.chemosphere.2021.129633

Abstract

The behavior of arsenic (As) in paddy soil is of great interest because rice is an efficient As accumulator, which can result in potential health risks to humans. In this study, we investigated the distribution and translocation of As speciation within the soil-rice system in the presence of Fenton solution (100 μM H₂O₂ and 100 μM Fe²⁺). The results showed that the iron plaque concentrations were enhanced either by the addition of Fenton solution or under flooded condition. In addition, total As, As⁵⁺, and As³⁺ concentrations were lower in rice tissues treated with Fenton solution than those without Fenton solution treatments. Therefore the addition of Fenton solution can reduce As speciation accumulation in rice tissue. This study revealed the function of Fenton solution on the fate of As speciation distribution within soil-rice system and the link between iron plaque and As accumulation in rice tissue under flooded and non-flooded conditions.

Keywords: Arsenate; Arsenite; Dimethylarsinic acid; Hydrogen peroxide; Rice.

MeSH terms

Arsenic* / analysis
Humans
Hydrogen Peroxide
Oryza*
Soil
Soil Pollutants* / analysis
Water

Substances

Soil
Soil Pollutants
Water
Hydrogen Peroxide
Arsenic