A paddy field study of arsenic and cadmium pollution control by using iron-modified biochar and silica sol together
| Autor: | Fangbai Li, Dandan Pan, Huanyu Yu, Chuanping Liu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Silicon
Iron Health Toxicology and Mutagenesis chemistry.chemical_element 010501 environmental sciences engineering.material 01 natural sciences Arsenic Soil pH Biochar Soil Pollutants Environmental Chemistry Ecotoxicology 0105 earth and related environmental sciences Oryza General Medicine Silicon Dioxide Pollution chemistry Charcoal Environmental chemistry engineering Paddy field Brown rice Fertilizer Edible Grain Environmental Pollution Cadmium |
| Zdroj: | Environmental Science and Pollution Research. 26:24979-24987 |
| ISSN: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-019-05381-x |
| Popis: | Under flooded conditions in paddy soil, the mobility of As increases while the mobility of Cd decreases. The opposite geochemical behavior of As and Cd makes it difficult to reduce their mobilities simultaneously. Our recent study found that combined applications of biochar and zero-valent iron successfully reduced the mobilities of As and Cd simultaneously. On this basis, in the present study, an iron-modified biochar (Fe-BC) was developed, and its effect on decreasing the accumulations of As and Cd in rice was verified in a 2-year field trial. In addition, previous studies indicated that silicon fertilizer can also reduce As and Cd accumulation in rice grain. Hence, the effect of the combined or separate application of Fe-BC and silica sol on As and Cd accumulation in rice grain was investigated. Over the 2-year field trial, the grain yields decreased in the following order: iron-modified biochar plus silica sol (Fe-BC plus Si) > silica sol (Si) > Fe-BC > control (CK). Concentrations of As and Cd in brown rice were in the order: Fe-BC plus Si |
| Databáze: | OpenAIRE |
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