Kabir, Md Humayun, Brodie, Graham, Gupta, Dorin, Pang, Alexis, Rahman, Mohammad Mahmudur, and Naidu, Ravi (2024) Arsenic speciation in rice grain grown in microwave and biochar treated soil. Journal of Food Composition and Analysis, 136. 106715.

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Abstract

Since the toxicity of arsenic (As) depends on its forms, it is necessary to determine the As species to evaluate the associated risk. Therefore, in this study, the As speciation of rice grain samples was performed. Arsenic contaminated (0, 20, 40, 60, and 80 mg kg–1) soils were treated with microwave (MW) and biochar (BC) with MW irradiation for 0, 3 and 6 minutes and BC application of 0, 10, 20 t ha–1 as As alleviation techniques where soil could remain contaminated but result in less accumulation in the grain. Atomic Fluorescence Spectrometry (AFS) and High-Performance Liquid Chromatography coupled with Inductively Coupled Plasma Mass Spectrometry (HPLC-ICP-MS) techniques were used for the determination of total As and As species identification respectively. With increasing soil As concentration both the inorganic As [as arsenite; As(III)] and organic As (as dimethylarsinic acid; DMA) concentration in rice grains increased significantly. However, rice grain As(III) and DMA concentrations were up to 73.74 % lower in MW treatments (MW-3 and MW-6) compared to the untreated control (MW-0). In rice grain samples, As was present mainly as DMA (70.6 %) and the remainder was As(III), accounting for 29.4 % of the total As. In the case of BC treatments, compared to the untreated control (BC-0), rice grain As(III) rose in the BC treatments (BC-10 and BC-20). While, DMA concentration decreased in the BC-10 treatment, compared with the control (BC-0), it increased again at BC-20. Thus, MW could be a novel technique for plant As toxicity alleviation however, more detail investigation needed considering MW and BC effect on the different soil’s rhizosphere system in different variety of rice.

Item ID:	85271
Item Type:	Article (Research - C1)
ISSN:	1096-0481
Copyright Information:	© 2024 Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies
Date Deposited:	29 Apr 2025 03:20
FoR Codes:	30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3006 Food sciences > 300699 Food sciences not elsewhere classified @ 30% 40 ENGINEERING > 4016 Materials engineering > 401699 Materials engineering not elsewhere classified @ 70%
SEO Codes:	26 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 2699 Other plant production and plant primary products > 269999 Other plant production and plant primary products not elsewhere classified @ 100%
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