Arsenic concentration, speciation, and risk assessment in sediments of the Xijiang River basin, China

Wang, Haibo; Xu, Jiaming; Goméz, Mario A.; Shi, Zhuqun; Li, Shifeng; Zang, Shuyan

doi:10.1007/s10661-019-7883-4

Cited by 10 publications

(4 citation statements)

References 38 publications

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“…The average annual temperature is 21.2℃, the average annual precipitation is about 1,650 mm, and the rainfall is mainly concentrated from April to October. The area is undulating and has a variety of soil types, including ruddy loam, red loam and mountainous yellow loam (Wang et al, 2019). The study area is rich in vegetation types, with 63 % forest cover, which plays an important role in water conservation and soil conservation in the XRB.…”

Section: Study Areamentioning

confidence: 99%

Relative importance of soil properties and functional diversity to the spatial pattern of the forest soil nitrogen

Kang

Deng

Zhang

et al. 2023

Ecological Indicators

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Section: Study Areamentioning

confidence: 99%

Relative importance of soil properties and functional diversity to the spatial pattern of the forest soil nitrogen

Kang

Deng

Zhang

et al. 2023

Ecological Indicators

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“…To fill this knowledge gap, we examined the Xijiang River basin in China, a system that allowed us to evaluate the influence of invisible carbon from coal burning at continental scales. This region was chosen due to its rapid industrialization and significant coal consumption, making it an ideal place to conduct the study [Xia Li and Yeh, 2004;H-b Wang et al, 2019a;S Wang et al, 2019b]. We mainly focused on…”

Section: Introductionmentioning

confidence: 99%

A neglected anthropogenic source of carbon triggered by the combustion of coal: evidence from riverine sulfate

Wang,

Li,

et al. 2023

Preprint

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To effectively reduce CO2 emissions, it’s vital to identify and quantify their sources. While the focus has been on CO2 from fossil fuel combustion, especially coal, the CO2 produced from coal’s other elements, such as sulfur, through chemical reaction, remains an ‘invisible’ carbon source. We analyzed the invisible carbon flux due to coal burning in the Xijiang River Basin, a highly industrialized region in China, using river sulfate fluxes. Dissolved sulfate concentration in the Xijiang River rose by over 300% from 1985 to 2011, largely due to coal combustion. In 2011, this resulted in 3.14 Mt of invisible carbon dioxide. We evaluated the impact of two flue gas desulfurization (FGD) methods on carbon emissions using a predictive model. By enhancing SO2 removal efficiency through these methods, China could cut invisible carbon emissions by 27.8 Mt CO2 annually, paving the way for a sustainable future.

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“…Sediments can release high As concentrations to water under the changes in physical and chemical factors and favorable hydraulic conditions (Chen et al 2016 ; Jahan and Strezov 2018 ; Nematollahi et al 2021 ). The sedimentary redox conditions and sediment properties (e.g., grain size, organic matter content) influenced the chemical speciation, concentration, and distribution of As in sediment (Wang et al 2019 ), resulting in various degrees of As bioavailability and toxicity (Ma et al 2015 ). As a result, contaminated sediments are a secondary As pollution source (Chen et al 2016 ; Nematollahi et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Polystyrene and low-density polyethylene pellets are less effective in arsenic adsorption than uncontaminated river sediment

Nguyen

Ren

et al. 2023

Environ Sci Pollut Res

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The adsorption process of inorganic arsenic (As) plays an important role in its mobility, bioavailability, and toxicity in the river environment. In this work, the adsorption of dissolved arsenite (As(III)) and arsenate (As(V)) by microplastics (MPs) pellets (polystyrene (PS) and low-density polyethylene (LDPE)), river sediment, and their mixture were investigated to assess the adsorption affinities and mechanism. The adsorption kinetics showed slow and mild rising zones from the natural behavior of the chemical adsorption. The results indicated that both MP characteristics and water properties played a significant role in the adsorption behavior of inorganic As species. The As adsorption equilibrium was modeled well by both Langmuir and Freundlich isotherms and partly fitted with the Sips model suggesting that both mono-layer and multi-layer adsorption occurred during adsorption The spontaneous adsorption process for both As(III) and As(V) was evidenced by the adsorption thermodynamics. The maximum adsorption capacities of As(III) and As(V) reached 143.3 mg/kg and 109.8 mg/kg on PS in deionized water, which were higher than those on sediment-PS mixture (119.3 mg/kg, 99.2 mg/kg), which were all lower than on sediment alone (263.3 mg/kg, 398.7 mg/kg). The Fourier transform infrared spectroscopy analysis identified that As(III) and As(V) interaction with sediment surface functional groups was the main adsorption mechanism from surface complexation and coordination. Two functional groups of polystyrene (-NH2, -OH) were mainly involved in the adsorption of inorganic As species on PS, while -COO- and -OH functional groups contributed to the adsorption mechanism of inorganic As species on LDPE. The findings provide valuable insight on the adsorption behavior and mechanisms of As(III) and As(V) in river systems in the presence of MPs particles. Both PS and LDPE were shown to be less effective than river sediment in the adsorption of As species from water, which provides a different perspective in understanding the scale of MPs impact in pollutant transport in the aquatic environment. Graphical Abstract

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Arsenic concentration, speciation, and risk assessment in sediments of the Xijiang River basin, China

Cited by 10 publications

References 38 publications

Relative importance of soil properties and functional diversity to the spatial pattern of the forest soil nitrogen

Relative importance of soil properties and functional diversity to the spatial pattern of the forest soil nitrogen

A neglected anthropogenic source of carbon triggered by the combustion of coal: evidence from riverine sulfate

Polystyrene and low-density polyethylene pellets are less effective in arsenic adsorption than uncontaminated river sediment

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