Use of water-treatment residue containing polysilicate-iron to stabilize arsenic in flooded soils and attenuate arsenic uptake by rice (Oryza sativaL.) plants
| Autor: | Tomoyuki Makino, Aomi Suda, Koji Baba, Ikuko Akahane |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Oryza sativa
Chemistry Amendment food and beverages Soil Science chemistry.chemical_element 04 agricultural and veterinary sciences Plant Science 010501 environmental sciences Straw complex mixtures 01 natural sciences Husk Ferrihydrite Agronomy Soil water Shoot 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Arsenic 0105 earth and related environmental sciences |
| Zdroj: | SC10201706150004 |
| ISSN: | 1747-0765 0038-0768 |
| DOI: | 10.1080/00380768.2015.1137200 |
| Popis: | A pot experiment was conducted to examine how soil amendment with water-treatment residue (WTR) containing polysilicate-iron affected dissolved arsenic (As) in flooded soils and As uptake by rice plants (Oryza sativa L.). The WTR was applied at a rate of 0 (control), 5, 10 or 20 t ha−1. Simple linear regression analyses showed significant negative relationships between the concentrations of dissolved As in soil solution and WTR application rates at all sampling times, probably due to adsorption of As onto ferrihydrite in the WTR. Compared to As concentrations in rice plants grown on control soil, the concentrations in plants grown on WTR-treated soils decreased by 20.1–41.6% in straw (stems and leaves), 19.8–31.7% in husk and 18.6–21.0% in grain. The regression analyses demonstrated that the concentration and content of As in rice are negatively correlated with WTR application rate. Total As content was 16.5–32.0% lower in rice shoots grown on WTR-treated soils than on control soil. The percentage... |
| Databáze: | OpenAIRE |
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