Arsenic content and fractionation in the surface sediments of the Guangzhou section of the Pearl River in Southern China

Wang, Shiliang; Cao, Xuezhi; Lin, Chunye; Xin-geng, Chen

doi:10.1016/j.jhazmat.2010.07.020

Cited by 47 publications

(14 citation statements)

References 31 publications

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“…Concentrations of K, Na, Ca, Mg, Fe, and Al in the water were measured using inductively coupled plasma mass spectroscopy (ICP-MS, X Series II, Thermo Electon, Waltham, MA, USA). Concentration of As in the water were determined using hydride generation-atomic fluorescence spectrometry (HG-AFS, Haiguang Instruments, Beijing, China) [33,34]. To determine the total As concentration, the water samples were pretreated with thiourea to reduce all As to As(III) prior to hydride generation.…”

Section: Sample Analysismentioning

confidence: 99%

Distribution and Geochemical Processes of Arsenic in Lake Qinghai Basin, China

Cao

Lin

Zhang

2021

Water

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Lake Qinghai in the Qinghai-Tibet plateau is the largest lake in China, but the geochemical understanding of arsenic (As) in the lake is lacking. Water, sediment, and soil samples were collected from Lake Qinghai, rivers flowing into the lake, and lands around the lake. Water samples were analyzed for major ions and As, while sediment and soil samples were analyzed for major elements and As. The average As concentration (25.55 μg L−1) in the lake water was significantly higher than that (1.39 μg L−1) in the river water (p < 0.05), due to the evaporative concentration of lake water. The average As concentration (107.8 μg L−1) in the pore water was significantly higher than that in the lake water, due to its secondary release from sediment solid phases in the reductive condition. The average As/Cl−, As/SO42− and As/Na molar ratios in the lake water were significantly lower than that in the river water, indicating As was partially transferred from dissolved phase to solid phase in the evaporative concentration process of the lake water. The average As/Ca molar ratio in the lake water was significantly higher than that in the river water, indicating more Ca than As precipitated in the lake water. Furthermore, the average As/Ca molar ratio in the lake water was significantly lower than that in the pore water, indicating more As than Ca was secondarily released from sediment solid phases. The average concentration of As(III) and As(V) were 0.35 and 1.04 μg L−1 for the river water, respectively, and 6.99 and 18.56 μg L−1 for the lake water, indicating As(V) was the predominant As form. The average As concentration was 16.75 mg kg−1 for the lake sediment and 13.14 mg kg−1 for the soil around the lake. Arsenic concentration was significantly negatively correlated with S and Ca concentration in the lake sediments, due to solid dilution effect induced by carbonate and sulfate precipitation. The average As/Sc molar ratio in the sediment (2.06) was significantly higher than that in the soil (1.32), indicating that relatively more As was enriched in the lake sediment.

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Section: Sample Analysismentioning

confidence: 99%

Distribution and Geochemical Processes of Arsenic in Lake Qinghai Basin, China

Cao

Lin

Zhang

2021

Water

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“…All the jars and devices were soaked with the 10% HCl over 24 h, cleaned with deionized water, and then dried in an oven. Total As and Hg, and total dissolved As and Hg in the water were measured using the traditional methods following standardized treatments (Qu et al, 2001;Wang et al, 2010). After the samples were collected they were freeze-dried at −80°C, the total amounts of As and Hg were determined by acid digestion, following the procedures described in published studies (Devesa-Rey and Paradelo, 2008;Wang et al, 2010).…”

Section: Analyses Of Samplesmentioning

confidence: 99%

“…Total As and Hg, and total dissolved As and Hg in the water were measured using the traditional methods following standardized treatments (Qu et al, 2001;Wang et al, 2010). After the samples were collected they were freeze-dried at −80°C, the total amounts of As and Hg were determined by acid digestion, following the procedures described in published studies (Devesa-Rey and Paradelo, 2008;Wang et al, 2010). Solutions of 0.1 M CaCl 2 , 0.01 M diethylenetriaminepentaacetic acid (DTPA), and 0.1 M HCl were chosen as extractants to measure labile As and Hg in the sediment.…”

Section: Analyses Of Samplesmentioning

confidence: 99%

“…Solutions of 0.1 M CaCl 2 , 0.01 M diethylenetriaminepentaacetic acid (DTPA), and 0.1 M HCl were chosen as extractants to measure labile As and Hg in the sediment. All of the single-extraction procedures used were consistent with those described in previous report (Devesa-Rey and Paradelo, 2008;Wang et al, 2010). Certified standard solutions and duplicates of all samples were used to ensure accuracy and precision.…”

Section: Analyses Of Samplesmentioning

confidence: 99%

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In situ high-resolution evaluation of labile arsenic and mercury in sediment of a large shallow lake

Wang

Yao

Wang

et al. 2016

Science of The Total Environment

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“…It has been reported that large amounts of industrial and domestic sewage have been discharged into YRE (Zhang et al, 2009). Anthropogenic inputs into the YRE, including pesticides, pigment production, glass and ceramic manufacturing, leaded gasoline manufacturing and smelting of As-bearing ores, might result in elevated total As concentrations in sediments (Wang et al, 2010;Duan et al, 2013). Moreover, commercial harbors, iron and steel mills and other industries in the intertidal zone may also contribute to the inflow of metals into the YRE (Chen et al, 2007).…”

Section: Temporal Changes Of Arsenic Concentrationsmentioning

confidence: 99%