Biochar and ash derived from silicon-rich rice husk decrease inorganic arsenic species in rice grain

Leksungnoen, Parapond; Wisawapipat, Worachart; Ketrot, Daojarus; Aramrak, Surachet; Nookabkaew, Sumontha; Rangkadilok, Nuchanart; Satayavivad, Jutamaad

doi:10.1016/j.scitotenv.2019.05.247

Cited by 35 publications

(15 citation statements)

References 58 publications

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“…Deionized water and biochar were mixed at a mass ratio of 20:1, and the pH value of the aqueous solution was measured with a pH meter to determine the acidity and basicity of the biochar. The ash content was measured by the combustion method [24]. The specific surface area and pore size distribution of biochar were investigated using N 2 -isothermal adsorption and desorption experiments.…”

Section: Physicochemical Properties and Structural Characterization Omentioning

confidence: 99%

Removal of Aquatic Cadmium Ions Using Thiourea Modified Poplar Biochar

Zhu

Liang

et al. 2020

Water

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Removal of aquatic cadmium ions using biochar is a low-cost method, but the results are usually not satisfactory. Modified biochar, which can be a low-cost and efficient material, is urgently required for Cd-polluted water and soil remediation. Herein, poplar bark (SB) and poplar sawdust (MB) were used as raw materials to prepare modified biochar, which is rich in N- and S- containing groups, i.e., TSBC-600 and TMBC-600, using a co-pyrolysis method with thiourea. The adsorption characteristics of Cd2+ in simulated wastewater were explored. The results indicated that the modification optimized the surface structure of biochar, Cd2+ adsorption process by both TSBC-600 and TMBC-600 was mainly influenced by the initial pH, biochar dosage, and contact time, sthe TSBC-600 showed a higher adsorption capacity compared to TMBC-600 under different conditions. The Langmuir adsorption isotherm model and pseudo-second-order kinetic model were more consistent with the adsorption behavior of TSBC-600 and TMBC-600 to Cd2+, the maximum adsorption capacity of TSBC-600 and TMBC-600 calculated by the Langmuir adsorption isotherm model was 19.998 mg/g and 9.631 mg/g, respectively. The modification method for introducing N and S into biochar by the co-pyrolysis of biomass and thiourea enhanced the removal rate of aquatic cadmium ions by biochar.

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Section: Physicochemical Properties and Structural Characterization Omentioning

confidence: 99%

Removal of Aquatic Cadmium Ions Using Thiourea Modified Poplar Biochar

Zhu

Liang

et al. 2020

Water

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“…Teasley et al (2017) observed about 40% decrease in grain arsenic concentration due to fresh rice husk amendment, whereas neither calcium silicate nor rice husk ash amendments significantly affected total grain arsenic. Leksungnoen et al (2019) also reported decreased inorganic grain arsenic by 20-24% as a result of the incorporation of RHA in soil. Alleviation of arsenic accumulation in rice by using other sources of silicon amendments, such as silica-gel (Li et al, 2009;Seyfferth and Fendorf, 2012;Fleck et al, 2013, Liu et al, 2014 and different silicate minerals as silica fertilisers (Guo et al, 2005;Guo et al, 2007;Tripathia et al, 2013;Wang et al, 2016;Limmer et al, 2018) have also been reported.…”

Section: Impacts Of Silicon Fertilisation On Ricementioning

confidence: 87%

Alleviation of arsenic accumulation in rice by applying silicon-rich rice husk residues in Bangladesh soil

Mamud

Saha

Hossain

et al. 2021

Bangladesh J. Sci. Ind. Res.

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While the accumulation of arsenic in rice (Oryza sativa L.) has been highlighted as a major concern in Bangladesh, sustainable measures are critically needed to reduce the uptake of arsenic by rice plants. In the present study, a pot-experiment was conducted using a Boro rice variety (BRRI dhan-29) in two geomorphologically different soils from Holocene floodplains and Pleistocene terraces, in which silicon-rich fresh rice husk (FRH) and rice husk ash (RHA) were applied, as silicon fertilisers, in the soils at the rate of 1% (w/w) of rice residue:soil.In the Holocene floodplain soils, the application of FRH was found to decrease arsenic in grain, husk and straw by 42, 56 and 51%, respectively, whereas the soil incorporation of RHA decreased arsenic in grain, husk and straw by 26, 37.5 and 36%, respectively. In the Pleistocene terrace soils, the application of FRH reduced the grain, husk and straw arsenic by 38, 38 and 44%, respectively, whereas the RHA decreased the grain, husk and straw arsenic by 26, 30 and 29%, respectively. Fresh rice husk was found to be more effective in alleviating arsenic accumulation in rice than RHA. In both the Holocene floodplain and Pleistocene terrace soils, the grain concentrations of calcium, phosphorus, silicon, and zinc were found to be increased with the decrease of arsenic in the grain due to the use of FRH and RHA. The present study suggests that silicon-rich rice husk residue scan be used as silicon fertilisers to reduce arsenic accumulation in rice in Bangladesh. Bangladesh J. Sci. Ind. Res.56(3), 195-206, 2021

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“…RHA was taken from a local rice mill in which rice husk was burnt to produce steam for the processing of paddy rice. The RHA shares multiple common physical and chemical characteristics with rice husk biochar (RHB) which is the product of the slow pyrolysis of rice husk under little or no oxygen condition 10 , 15 , 16 . Compared to RHA, RHB had greater carbon content, nitrogen content, neutralizing power, pH value, CEC, and SSA, and much less silicon content, but no difference in macro-and micro nutrients including K, P, Ca, Mg, Manganese (Mn), Iron (Fe) 10 , 12 .…”

Section: Methodsmentioning

confidence: 99%

“…The incorporation of RHA to Pb contaminated soil mitigated Pb damage to R. communis , and enhanced the uptake of nutrients and the activities of antioxidant enzymes 15 . RHA significantly reduced inorganic arsenic (As) accumulation in rice grains 16 . In addition, RHA has been widely used as an absorbent for the removal of lead (Pb(II) and mercury (Hg(II)) from an aqueous solution 11 .…”

Section: Introductionmentioning

confidence: 99%

Rice husk ash addition to acid red soil improves the soil property and cotton seedling growth

Yin

Liu

et al. 2022

Sci Rep

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Red soil is characterized by poor physico-chemical properties and low nutrient availability. The present study aimed to examine rich husk ash (RHA) incorporation into red soil at various rates effects on its properties and the growth of cotton seedlings under a plug-seeding in tray experiment. Bulk density was decreased, and water holding capacity and total porosity were increased in red soil with increasing application rate of RHA. The addition of RHA counteracts the acidity of red soil and improves the nutrient availability to plants. The RHA incorporated soils favored the growth of cotton seedlings with improved shoot morphological traits and root architectures. The application rate at a volume ratio of 1:1 of RHA to red soil was found to be optimal for growing cotton seedlings in the present study. The mixture of RHA and red soil at a 1:1 volume ratio plus 2 g L−1 super absorbent polymers exhibited a high nursing seedling efficiency comparable to a commercial growing media under the condition of foliar application of mepiquat chloride at the one-true-leaf stage. RHA can be a promising substitute for peat as growing media for nursing cotton seedlings.

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Biochar and ash derived from silicon-rich rice husk decrease inorganic arsenic species in rice grain

Cited by 35 publications

References 58 publications

Removal of Aquatic Cadmium Ions Using Thiourea Modified Poplar Biochar

Removal of Aquatic Cadmium Ions Using Thiourea Modified Poplar Biochar

Alleviation of arsenic accumulation in rice by applying silicon-rich rice husk residues in Bangladesh soil

Rice husk ash addition to acid red soil improves the soil property and cotton seedling growth

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