The Fluctuation of Arsenic Levels in Lake Taihu

Wei, Chaoyang; Zhang, Nan; Yang, Linsheng

doi:10.1007/s12011-011-8974-4

Cited by 15 publications

(4 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The fate of arsenic within the lake water column largely depends on the mixing regime of the lake. Classically, elevated levels of arsenic are associated with anaerobic hypolimnetic waters that form during summer stratification (Aggett and O'Brien ; Azcue and Nriagu ; Senn et al ; Barringer et al ; Wei et al ). In seasonally stratified lakes, arsenic generally remains trapped within the hypolimnion and is typically present in the reduced form as arsenite (Aurilio et al ; Martin and Pedersen ; Durant et al ; Barringer et al , ; Chen et al ; Barrett et al ).…”

mentioning

confidence: 99%

Contrasting arsenic cycling in strongly and weakly stratified contaminated lakes: Evidence for temperature control on sediment–water arsenic fluxes

Barrett

Hull

Burkart

et al. 2019

Limnology & Oceanography

View full text Add to dashboard Cite

Arsenic contamination of lakebed sediments is widespread due to a range of human activities, including herbicide application, waste disposal, mining, and smelter operations. The threat to aquatic ecosystems and human health is dependent on the degree of mobilization from sediments into overlying water columns and exposure of aquatic organisms. We undertook a mechanistic investigation of arsenic cycling in two impacted lakes within the Puget Sound region, a shallow weakly stratified lake and a deep seasonally stratified lake, with similar levels of lakebed arsenic contamination. We found that the processes that cycle arsenic between sediments and the water column differed greatly in shallow and deep lakes. In the shallow lake, seasonal temperature increases at the lakebed surface resulted in high porewater arsenic concentrations that drove larger diffusive fluxes of arsenic across the sediment-water interface compared to the deep, stratified lake where the lakebed remained~10 C cooler. Plankton in the shallow lake accumulated up to an order of magnitude more arsenic than plankton in the deep lake due to elevated aqueous arsenic concentrations in oxygenated waters and low phosphate : arsenate ratios in the shallow lake. As a result, strong arsenic mobilization from sediments in the shallow lake was countered by large arsenic sedimentation rates out of the water column driven by plankton settling.

show abstract

mentioning

confidence: 99%

Contrasting arsenic cycling in strongly and weakly stratified contaminated lakes: Evidence for temperature control on sediment–water arsenic fluxes

Barrett

Hull

Burkart

et al. 2019

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…Arsenic determination as well as the QA/QC procedure were performed using the protocols described in our previous study in Lake Taihu (Wei et al 2011). The average recovery for As determination in this study was 102.3% ± 13.6%.…”

Section: Methodsmentioning

confidence: 99%

Arsenic Variation in Two Basins of Lake Dianchi

Wei

Zhang

2012

Bull Environ Contam Toxicol

Self Cite

View full text Add to dashboard Cite

The spatial variation of arsenic, including arsenic speciation changes under the influence of water quality parameters in lake Dianchi, China was investigated. The water quality parameters were found to differ between the two basins of the lake (Caohai vs. Waihai), consistent with the eutrophic status. Arsenic in Caohai was greater than that in Waihai, with average values as 9.45 and 6.68 lg L -1 , respectively. Expect redox potential, correlation between various water quality parameters and arsenic forms were found, supporting the hypothesis that arsenic partition in suspended particulates in Lake Dianchi was driven mainly by biota factor.Keywords Arsenic Á Forms Á Arsenite Á Water quality parameters Arsenic (As) is a ubiquitous but toxic element. The range of background As levels in water is 0.1-80 lg L -1 . However, the elevation of As in groundwater due to the reduction and dissolution of As-containing minerals in alluvial strata occurs in some areas of the world, causing serious detriment to human health, mainly in India, Bangladesh and China (Mandal et al. 2007). Arsenic in drinking water has been legally restricted to within 10 lg L -1 by the WHO and China to protect human health (WHO 2003). Lakes act as watershed sinks, receiving both natural and anthropogenic sources of As (Nikolaidis et al. 2004). Arsenic in the water column is equilibrated between suspended particulates and water, with sorption and desorption reactions. These reactions are influenced by various factors, such as changes of temperature, pH and redox potential, organic degradation and other reduction reactions (Couture et al. 2010). The sorption and desorption of As in lake waters have been found to be concomitant with As oxidation/reduction in the outer sphere of particulates, causing the sorption/ desorption of As between the particulate and water phases (Gao et al. 2006). Dianchi, the sixth largest fresh water lake in China, is located near Kunming city, Yunnan province. The lake covers an area of 308.6 km 2 , with an average depth of 4.4 m and an elevation of 1,887.4 m, and is separated by a dam in the north, forming two basins as Caohai and Waihai (Fig. 1). The lake is in a hypereutrophic status, with severe algae blooms occurring annually over the past two decades. The nitrogen and phosphorus contents were found to decrease gradually from the north to south, which is consistent with the eutrophic status of the lake (Hu et al. 2006). Arsenic is a chemical analogue to phosphorus, and the relationship between phosphorus with eutrophication and the interaction of As and phosphorus has been documented in many lakes (Martin and Pedersen 2004;Rahman et al. 2008). Nevertheless, the As behavior in Lake Dianchi, especially its relationship with eutrophication, has rarely been documented to date. An investigation of As in Lake Dianchi may be helpful in understanding As behavior in hypereutrophic lakes. The objective of this study was to elucidate the spatial variation of As in relation to the eutrophic status of Lake Dianchi.

show abstract

“…The potential adverse effects of arsenic on ecological receptors (e.g., mammals, birds, plants, and/or fish) should be evaluated. Up to now, lots of studies on the ecological risk assessment of arsenic pollution have been conducted (Zhang et al, 2013;Wang and Mulligan, 2006;Barringer et al, 2011;Peng et al, 2004;Wei et al, 2011;Keimowitz et al, 2005;Jackson et al, 1991;Mazej and Germ, 2009). However, most of the previous studies on arsenic concentrations and ecological risk assessment in sediment and water focused on the total arsenic concentrations, and limited information was available on arsenic speciation.…”

Section: Introductionmentioning

confidence: 99%

The potential risk assessment for different arsenic species in the aquatic environment

Wei²,

Tan³

et al. 2015

Journal of Environmental Sciences

View full text Add to dashboard Cite

The different toxicity characteristics of arsenic species result in discrepant ecological risk.The predicted no-effect concentrations (PNECs) 43.65, 250.18, and 2.00 × 10 3 μg/L were calculated for As(III), As(V), and dimethylarsinic acid in aqueous phase, respectively. With these PNECs, the ecological risk from arsenic species in Pearl River Delta in China and Kwabrafo stream in Ghana was evaluated. It was found that the risk from As(III) and As(V) in the samples from Pearl River Delta was low, while much high in Kwabrafo stream. This study implies that ecological risk of arsenic should be evaluated basing on its species.

show abstract

The Fluctuation of Arsenic Levels in Lake Taihu

Cited by 15 publications

References 29 publications

Contrasting arsenic cycling in strongly and weakly stratified contaminated lakes: Evidence for temperature control on sediment–water arsenic fluxes

Contrasting arsenic cycling in strongly and weakly stratified contaminated lakes: Evidence for temperature control on sediment–water arsenic fluxes

Arsenic Variation in Two Basins of Lake Dianchi

The potential risk assessment for different arsenic species in the aquatic environment

Contact Info

Product

Resources

About