Effects of elevated sulfate concentration on the mobility of arsenic in the sediment–water interface

Li, Shiyu; Yang, Chao; Peng, Changhui; Li, Haixia; Liu, Bin; Chen, Chuan; Chen, Bingyu; Bai, Jinyue; Lin, Chunye

doi:10.1016/j.ecoenv.2018.02.046

Cited by 25 publications

(6 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Arsenic(III) (As 3+ ), the other common oxidation state of As, tends to remain adsorbed to lake sediment unless relatively high concentrations of sulfate (SO 4 2– ) and dissolved organic carbon are present in the overlying lake water. These 2 parameters are crucial for microbial activity to cause desorption, which has been found to cause approximately 69% of As 3+ desorption from lake sediments (Li et al ). These processes may have influenced the fluctuations in As concentrations apparent in the sediment core; although some As species remain adsorbed to the sediment, others continually migrate toward the sediment surface, somewhat obscuring the increasing trend in As contamination up‐profile.…”

Section: Discussionmentioning

confidence: 99%

“…Mercury (Hg) is a toxic metal that is nearly ubiquitous in environments on Earth (Chen ). Coal is known to contain concentrations of Hg that vary by location (Yudovich and Ketris ), ranging from 0.07 to 0.24 ppm Hg in the United States (Tewalt et al 2018) and from 0.05 to 0.37 ppm Hg in China (Li ). Subsequently, the burning of coal to produce energy releases Hg and other toxic elements to the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, the burning of coal to produce energy releases Hg and other toxic elements to the atmosphere. Power generation accounts for the second largest anthropogenic input of Hg to the atmosphere, at 16% of total Hg emission (Li ). These emissions are made up of plumes of gaseous oxidized Hg, which only affect the source region, and gaseous elemental Hg, which can reside in the atmosphere long enough to have a global impact (Estrade et al ).…”

Section: Introductionmentioning

confidence: 99%

“…These emissions are made up of plumes of gaseous oxidized Hg, which only affect the source region, and gaseous elemental Hg, which can reside in the atmosphere long enough to have a global impact (Estrade et al ). After residing in the atmosphere for up to 1 yr (Li ), these plumes eventually deposit Hg in surficial environments via wet and dry deposition, and oxidation (Bergquist and Blum ). These atmospheric Hg fluxes are the primary means of both global and regional Hg contamination (Schuster et al ).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Atmospheric Deposition of Coal‐Related Pollutants in the Pacific Northwest of the United States from 1950 to 2016

Sousa

Benson

Welty

et al. 2019

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Coal-related elements are toxic and persistent pollutants that have spread globally since the industrial revolution, mainly from point-source emissions. A sediment core was collected from Deep Lake in northeastern Washington State (USA) by the Washington State Department of Ecology, with the aim of assessing recent changes in atmospheric deposition in the US Pacific Northwest. The core was divided into depth intervals and dated by lead-210. A sample from each cross section was digested and analyzed for toxic metals and metalloids using inductively coupled plasma-mass spectrometry. Data show recent increases in the concentrations of arsenic, barium, selenium, and mercury. Comparison with 1993 US Geological Survey ice core data from the Upper Fremont Glacier in Wyoming (USA), Asian coal consumption data, and weather patterns suggests that pollutant inputs to Deep Lake sediments are the result of coal-burning activities in the Asia-Pacific region. Most notably, mercury deposition in Deep Lake has increased from approximately 20 ppb in 1996 to 9470 ppb in 2014 (an~400-fold increase), and since 1993 when the ice core was analyzed. Environ Toxicol Chem 2020;39:335-342. © 2019 SETAC

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Atmospheric Deposition of Coal‐Related Pollutants in the Pacific Northwest of the United States from 1950 to 2016

Sousa

Benson

Welty

et al. 2019

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

show abstract

“…erefore, studies of arsenic transportation and transformation at the intertidal SWI of Bohai Bay based on speciation analysis will be more significant. However, the geochemical cycle of arsenic is quite complicated here as many factors have strong effects on this process [8,9]. At present, available data on arsenic in the intertidal SWI of Bohai Bay are insufficient for the evaluation of their physicochemical behaviors and total environmental impacts because the chemical states of arsenic in sediment and porewater need to be known to evaluate their mobility, bioavailability, and toxicity.…”

Section: Introductionmentioning

confidence: 99%

Transportation and Transformation of Arsenic Species at the Intertidal Sediment-Water Interface of Bohai Bay, China

Guo

Wang

2018

Journal of Chemistry

View full text Add to dashboard Cite

Arsenic species including arsenite As(III), arsenate As(V), monomethylarsenate (MMA), dimethylarsenate (DMA), and some diagenetic constituents (Fe, Mn, and S 2− ) in porewaters along with the unstable arsenic species in sediments collected from a typical intertidal zone of Bohai Bay in China were measured. eir vertical distributions were subsequently obtained to reveal the transportation and transformation characteristics of arsenic at the intertidal sediment-water interface (SWI). Results show that the reduction of As(V) by microorganisms occurred in sediments, but the methylation of arsenic by microorganisms was weak in the intertidal zone. e distribution of As(V) was mainly controlled by Mn, whereas As(III) appeared to be more likely controlled by Fe. Arsenic in sediments mainly existed in a stable state, so that only little arsenic could be released from sediments when the environmental conditions at the SWI are changed. As(III) diffused from porewaters to the overlying water while the opposite was true for As(V) at that time when the samples were collected. e total diffusion direction for arsenic across the SWI was from porewaters to the overlying water with a total diffusive flux estimated at 1.23 mg·m −2 ·a −1 .

show abstract

Exploring the long-term impact of a cadmium pollution accident on microbial communities in river ecosystems

Wang,

et al. 2024

Biogeochemistry

View full text Add to dashboard Cite

The large leakage accidents of heavy metals from industrial facilities pose a serious environmental problem; however, not enough studies have been conducted to assess the long-term ecological risk associated with such accidents. This study evaluated changes in the bacterial communities within river sediment and identified the key functional microorganisms responding to the 2012 cadmium contamination incident in the Long River, Guangxi Province, China. Results revealed that after a prolonged period of pollution accidents, cadmium pollution still had a discernible effect on the bacterial communities of the river sediment. In comparison to the control site (S1), the bacterial α-diversity in sediments from the accident area (S3) and its downstream (S5) showed a significant increase following the incident. In the control site, Burkholderiaceae was dominant, while in S3 and S5, Pedosphaeraceae, Nitrosomonadaceae, Nitrospiraceae and Geobacteraceae were significantly increased. Sulfur bacteria were found to be more responsive to this cadmium contamination than other bacteria. At site S3, the abundances of Sulfuricurvum, Sulfurifustis, Thioalkalispira, Desulfobacteraceae and Desulfarculaceae were hundreds of times higher than at site S1, indicating an intensification of sulfur cycling processes. The functional prediction implied that cadmium pollution may promote methane oxidation coupled with sulfate reduction reactions and altered the processes of nitrification and denitrification. Environmental factors influencing the microbial community included the levels of metals (cadmium, arsenic, iron) in sediment, as well as other sediment characteristics like temperature and electrical conductivity. These findings contribute to our understanding of the long-term ecological consequences of environmental pollution in river ecosystems. Graphical abstract

show abstract

Effects of elevated sulfate concentration on the mobility of arsenic in the sediment–water interface

Cited by 25 publications

References 45 publications

Atmospheric Deposition of Coal‐Related Pollutants in the Pacific Northwest of the United States from 1950 to 2016

Atmospheric Deposition of Coal‐Related Pollutants in the Pacific Northwest of the United States from 1950 to 2016

Transportation and Transformation of Arsenic Species at the Intertidal Sediment-Water Interface of Bohai Bay, China

Exploring the long-term impact of a cadmium pollution accident on microbial communities in river ecosystems

Contact Info

Product

Resources

About