under arsenic contamination

Overview

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Key numbers

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• accordance with accepted academic rice plant height, panicle number, and grain yield by 16.5%, 50%, and 85.7%,
• significantly reducing grain AsIII/total As ratio by 46.9%. Under As contamination,
• 65.6%. The results reveal that Zn and Cu amendments could promote rice yield
• defoliants ranges widely from 5–2,553 mg kg–1 (Anawar et al.,
• As, arsenite (AsIII) represents about 70% of total As in U.S. rice 2.1 Background soil properties
• concerns caused by arsenic pollution and toxicity, including shown in Table 1. Briefly, the soil is a Hockley silt loam (fine,
• selection of appropriate fertilizer amendments. smectitic, hyperthermic Typic Albaqualfs) with 19% silt and 15%
• micronutrients for plants. A suitable amount of Cu fertilization bioavailable Cu, and 0.6 mg kg-1 dethylenetriaminepentaacetic acid
• concentrations in rice shoots and roots by 40.7% and 31.6%, obtained from Alfa Aesar (Haverhill, MA, USA). ACS reagent-grade
• NPs decreased As accumulation in rice shoots by 28% less while Zn2 Sigma Aldrich (St. Louis, MO, USA). Detailed characterization of these
• decreased As accumulation in rice shoots by 15%. However, it is nanoparticles and bulk particles has been reported in our previous
• was added to each pot to reach 70% water holding capacity (WHC). a balance. A hundred filled grains and a hundred unfilled grains
• seedlings in each pot were monitored to determine the optimum the hulls and grains. A 5 mL of 70% nitric acid solution was added
• trays to maintain the temperature of each pot. The water levels in was digested with 3 mL of 30% (w/v) H2O2, heated at 95°C for
• using Tukey’s HSD at a 5% level of significance. Pearson correlation chlorophyll SPAD index among the nanoparticle, ionic counterpart,
• chlorophyll SPAD index of rice leaf, whereas all other amendments 0.05) and shared a similar trend (Table 2; Figures 2A-C). As
• to the rice plants in the As control treatment. In contrast, adding Si- grain, unfilled grain, and total grain dry weight by 87.5%, 66.7%,
• containing amendments promoted leaf chlorophyll content, and 85.7%, respectively, compared with the background control.
• TABLE 2 Pearson’s correlations (r) and p value between parameters.
• SiO2 nanoparticles did not affect rice yield components, including when As concentrations ranged from 1.2 to 2.6 mg kg-1. These
• CuSO4 treatment. concentration increases. Further research with a wider range of
• The presence of 5 mg kg-1 arsenic significantly (p ≤ 0.05) 19% silt and 15% clay content, and possessing 8520 mg kg-1 total C,
• reduced by 17%, and the AsIII/total As ratio was reduced by 47%. in clay or organic matter content tend to effectively retain As,
• milled grain by 20.2%, 65.6%, and 26.0%, respectively; and NPs had no discernible advantages over their ionic and bulk
• 70.6%, 64.7%, and 64.1%, respectively. Among the three types of Cu chlorophyll index, shoot dry biomass, and panicle numbers. By
• findings of Shaibur et al. (2006), who reported an 11% decrease nanoparticles to rice photosynthesis and prompts further
• under As contamination. Previous research has reported the background level. This recovery was accompanied by a 17%
• both positive and negative effects of NPs, such as ZnO NPs, CuO reduction in grain As accumulation and a notable 47% decrease in
• such as As. To harness the potential benefits of NPs and mitigate Cu limit (1.3 ppm) in drinking water as set by the EPA’s National
• As ratio by 46.9% and 65.6%, respectively. The results revealed that acknowledge partial financial support from the National Science
• contaminated with arsenic. Plant Soil Environ. 54, 30–37. doi: 10.17221/2778-PSE in crops, vegetables, animals and food products. Food Chem. 276, 608–618.

Methods (brief)

• samples (Kim et al., 2013). In flooded rice fields, arsenite (AsIII) and chemicals
• and/or dimethylarsinic acid (DMA) are typically the most abundant
• forms, with low to negligible levels of arsenate (As V ) and Soil (0–15 cm) was collected from a rice field in Eagle Lake
• NPs and Zn2+ on As accumulation in rice and reported that ZnO Fisher Chemical (Hampton, NH, USA). NaAsO2 was obtained from
• Soil was collected from a research field at Texas A&M AgriLife Research Center at Eagle Lake, TX (29°38’23”N, 96°20’51”W) in 2020, air-dried, and passed 2-mm sieve for chemical analysis. EC,
• homogenization. Rainwater was collected and stored in large grain weight and 1000-unfilled grain weight.
• day after planting (DAP)), seven pre-geminated seeds were drill- mass spectrometry (ICP-MS 7500cs, Agilent Technologies, Santa
• seeded to 1–1.5 cm in each of the 44 pots using tweezers. For the Clara, CA, USA) after acid digestion following Wang et al. (2022b).
• the trays were maintained throughout the experiment until the another 2 hours, and determined with ICP-MS following Wang
• Abedin, M. J., Cresser, M. S., Meharg, A. A., Feldmann, J., and Cotter-Howells, J. et al. (2018). Toxicity of copper oxide nanoparticles on spring barley (Hordeum sativum
• (2013). Determination of arsenic species in rice grains using HPLC-ICPMS. Food Sci. impact of three metallic nanoagrichemicals and their bulk and ionic counterparts on

Implications

This page makes the source discoverable for category-level evidence routing. Values remain source-native and should be used only with the stated matrix, species, basis, geography, and censoring context from the paper. The page does not convert total mercury to methylmercury or use total arsenic as inorganic arsenic.

Wiki pages this source may touch

• Baby Sunscreen, Mineral (ZnO + TiO2)
• Cadmium
• Arsenic

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Update history

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