Journal ArticleDOI
Growing Rice Aerobically Markedly Decreases Arsenic Accumulation
Reads0
Chats0
TLDR
It is demonstrated that a greatly increased bioavailability of As under the flooded conditions is the main reason for an enhanced As accumulation by flooded rice, and growing rice aerobically can dramatically decrease the As transfer from soil to grain.Abstract:
Arsenic (As) exposure from consumption of rice can be substantial, particularly for the population on a subsistence rice diet in South Asia. Paddy rice has a much enhanced As accumulation compared with other cereal crops, and practical measures are urgently needed to decrease As transfer from soil to grain. We investigated the dynamics of As speciation in the soil solution under both flooded and aerobic conditions and compared As accumulation in rice shoot and grain in a greenhouse experiment. Flooding of soil led to a rapid mobilization of As, mainly as arsenite, in the soil solution. Arsenic concentrations in the soil solution were 7−16 and 4−13 times higher under the flooded than under the aerobic conditions in the control without As addition and in the +As treatments (10 mg As kg−1 as arsenite or arsenate), respectively. Arsenate was the main As species in the aerobic soil. Arsenic accumulation in rice shoots and grain was markedly increased under flooded conditions; grain As concentrations were 10−15...read more
Citations
More filters
Journal ArticleDOI
Arsenic in the food chain and assessment of population health risks in Bangladesh
Md. Saiful Islam,Md. Saiful Islam,Md. Kawser Ahmed,Md. Habibullah-Al-Mamun,Md. Habibullah-Al-Mamun,Dennis Wayne Eaton +5 more
TL;DR: The result shows the highest THQs of arsenic in cereals and vegetables for both the rural and urban inhabitants which exceed the safe limit (>1) indicating that cerealsand vegetables are the main food items contributing to the potential health risk.
Journal ArticleDOI
Iron and zinc isotope fractionation during uptake and translocation in rice (Oryza sativa) grown in oxic and anoxic soils
Tim Arnold,Tamara Markovic,Guy J. D. Kirk,Maria Schönbächler,Mark Rehkämper,Fang-Jie Zhao,Dominik J. Weiss,Dominik J. Weiss +7 more
TL;DR: In this article, the authors investigated Zn and Fe isotope fractionation in rice grown to maturity in anaerobic and aerobic soils under greenhouse conditions and found that the Zn in the grain was isotopically lighter than in the rest of the above ground plant.
Journal ArticleDOI
Arsenic Accumulation in Food Crops: A Potential Threat in Bengal Delta Plain
TL;DR: In this article, the status of arsenic contamination, mobilisation and uptake in crops of India, Bangladesh specifically along with other arsenic- affected crops worldwide and related health impacts due to the consumption of arsenic laden water and food.
Journal ArticleDOI
Arsenic in Rice Soils and Potential Agronomic Mitigation Strategies to Reduce Arsenic Bioavailability: A Review
TL;DR: In this paper, an approach to reduce As input into rice soils or uptake by rice is proposed, which is based on using rice under aerobic, intermittent flooding, or alternate wetting and drying (AWD) conditions, rather than in submerged soils.
Journal ArticleDOI
Rhizospheric iron and arsenic bacteria affected by water regime: Implications for metalloid uptake by rice
Sarah Zecchin,A. Corsini,Maria Martin,Marco Romani,Gian Maria Beone,R. Zanchi,Elena Zanzo,D. Tenni,Maria Chiara Fontanella,Lucia Cavalca +9 more
TL;DR: A potential active role of rhizospheric iron- and arsenic-cycling bacteria in determining arsenic accumulation in rice grains from plants cultivated under continuous flooding, even in soil with a low arsenic content is indicated.
References
More filters
Journal ArticleDOI
A review of the source, behaviour and distribution of arsenic in natural waters
TL;DR: The scale of the problem in terms of population exposed to high As concentrations is greatest in the Bengal Basin with more than 40 million people drinking water containing ‘excessive’ As as mentioned in this paper.
Journal ArticleDOI
Differenzierung der Eisenoxide des Bodens durch Extraktion mit Ammoniumoxalat‐Lösung
Journal ArticleDOI
Worldwide Occurrences of Arsenic in Ground Water
TL;DR: Nordstrom et al. as mentioned in this paper argue that human health risks from arsenic in ground water can be minimized by incorporating hydrogeochemical knowledge into water management decisions and by more careful monitoring for arsenic in geologically high-risk areas.
Journal ArticleDOI
Arsenic uptake and metabolism in arsenic resistant and nonresistant plant species
TL;DR: This review synthesizes current knowledge on arsenic uptake, metabolism and toxicity for arsenic resistant and nonresistant plants, including the recently discovered phenomenon of arsenic hyperaccumulation in certain fern species.
Journal ArticleDOI
Effect of redox potential and pH on arsenic speciation and solubility in a contaminated soil
TL;DR: In this article, the influence of redox potential and pH on arsenic speciation and solubility was studied in a contaminated soil, and the observed slow kinetics of the As(V)-As(III) transformation and the high concentrations of Mn present indicate that, under reduced soil conditions, arsenic solubability could be controlled by a Mn{sub 3}(AsO{sub 4}){sub 2} phase.