Effect of simulated acid rain on stability of arsenic calcium residue in residue field

Fei, Jiangchi; Ma, Jingjing; Yang, Jinqin; Liang, Yanjie; Ke, Yanxiong; Yao, Liwei; Li, Yuancheng; Liu, Degang; Min, Xin

doi:10.1007/s10653-019-00273-y

Cited by 29 publications

(7 citation statements)

References 49 publications

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“…13 The solubility of iron arsenate (K sp ¼ 10 À21 to 10 À24 ) is about 1 million times smaller than that of calcium arsenate (K sp ¼ 10 À18 to 10 À21 ) in water. 14,15 Calcium arsenate can react with carbon dioxide to produce calcium carbonate and watersoluble arsenic acid, resulting in the re-dissolution of arsenic. 16 In this study, the advantages and disadvantages of these two arsenates are considered.…”

Section: Introductionmentioning

confidence: 99%

The synthesis of calcium arsenate@iron arsenate coating materials and their application for arsenic-containing wastewater treatment

2020

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Section: Introductionmentioning

confidence: 99%

The synthesis of calcium arsenate@iron arsenate coating materials and their application for arsenic-containing wastewater treatment

2020

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“…The study showed that the release of As from the tailings was favorable under acidic environment. Especially in the strong acidic environment with pH = 0, the stability of As-S, Fe-As, and Ca-As species in the TT will substantially reduce [ 26 , 51 ]. Moreover, the structure of C-S-H and ettringite will be destroyed, leading to an increase of As leaching.…”

Section: Resultsmentioning

confidence: 99%

Harmless Treatment of High Arsenic Tin Tailings and Environmental Durability Assessment

Zhao

Zhang

Yang

et al. 2022

IJERPH

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The treatment of arsenic (As) in tin tailings (TT) has been an urgent environmental problem, and stabilization/solidification (S/S) treatment is considered an effective technology to eliminate contamination of As. In this study, we developed a low-carbon and low-alkalinity material to S/S of As, and the results showed that the leaching concentration of As after treatment was lower than the Chinese soil environmental quality standard (0.1 mg/L). Based on a series of characterization tests, we found that OH− promoted the dissolution of As(III)-S, Fe-As(V), and amorphous As(III)-O species and formed Ca-As(III) and Ca-(V) species with Ca2+. Simultaneously, hydration produces calcium silicate hydrate (C-S-H) gel and ettringite by the form of adsorption and ion exchange to achieve S/S of As. We also assessed the durability of this material to acidity and temperature, and showed that the leaching concentration of As was below 0.1 mg/L at pH = 1–5 and temperature 20–60 °C. The method proposed in this study, S/S of As, has excellent effect and environmental durability, providing a new solution for harmless treatment of TT and its practical application.

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“…Worldwide occurrence of AR could negatively affect ecosystem components causing forest declines (Zheng et al 2019) and loss of biodiversity, altering litter properties and enhancing soil acidification (Fei et al 2020), leading to declining in soil microbial communities (Wei et al 2020). One of the essential components of terrestrial ecosystems, plant productivity, is also negatively affected by AR pollution (Liu et al 2018a, b), leading to loss of leaves, inhibition of growth, premature defoliation or premature aging, necrotic spots, and other visible symptoms (Bobbink et al 2010;Du et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Global Trends of Acidity in Rainfall and Its Impact on Plants and Soil

Prakash

Agrawal

2022

J Soil Sci Plant Nutr

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Due to its deleterious and large-scale effects on the ecosystem and long-range transboundary nature, acid rain has attracted the attention of scientists and policymakers. Acid rain (AR) is a prominent environmental issue that has emerged in the last hundred years. AR refers to any form of precipitation leading to a reduction in pH to less than 5.6. The prime reasons for AR formation encompass the occurrence of sulfur dioxide (SO 2 ), nitrogen oxides (NO x ), ozone (O 3 ), and organic acids in air produced by natural as well as anthropogenic activities. India, the top SO 2 emitter, also shows a continuous increase in NO 2 level responsible for AR formation. The plants being immobile unavoidably get exposed to AR which impacts the natural surrounding negatively. Plants get affected directly by AR due to reductions in growth, productivity, and yield by damaging photosynthetic mechanisms and reproductive organs or indirectly by affecting underground components such as soil and root system. Genes that play important role in plant defense under abiotic stress gets also modulated in response to acid rain. AR induces soil acidification, and disturbs the balance of carbon and nitrogen metabolism, litter properties, and microbial and enzymatic activities. This article overviews the factors contributing to AR, and outlines the past and present trends of rainwater pH across the world, and its effects on plants and soil systems.

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Effect of simulated acid rain on stability of arsenic calcium residue in residue field

Cited by 29 publications

References 49 publications

The synthesis of calcium arsenate@iron arsenate coating materials and their application for arsenic-containing wastewater treatment

The synthesis of calcium arsenate@iron arsenate coating materials and their application for arsenic-containing wastewater treatment

Harmless Treatment of High Arsenic Tin Tailings and Environmental Durability Assessment

Global Trends of Acidity in Rainfall and Its Impact on Plants and Soil

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