Metal fluxes at the sediment–water interface in rivers in the Turvo/Grande drainage basin, São Paulo State, Brazil

Campanha, Mariele B.; Moreira, Altair Benedito; Bisinoti, Márcia Cristina

doi:10.1007/s11368-012-0591-0

Cited by 13 publications

(15 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The concentrations of most of the metals in the SR pore water varied slightly, and the highest concentration was founded between 15-and 20-cm depth, except for Zn, which concentration was varied dramatically in all depths. Most of the metals were found at low concentrations in the top layers of the sediment (which correspond with the oxic zone), and higher metal concentrations were found in the deeper layers corresponding with the sub-oxic zones, and these results were similar to the results of other studies (Campanha et al 2012, Couture et al 2010, SantosEcheandia et al 2009). …”

Section: Resultssupporting

confidence: 90%

Distributions, fluxes, and toxicities of heavy metals in sediment pore water from tributaries of the Ziya River system, northern China

Zhu

Shan

Li³

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

The distributions and mobilities of metals in pore water strongly influence the biogeochemical processes and bioavailabilities of metals at sediment-water interfaces. Heavy metal concentrations were measured in pore water samples from the Shaocun River (SR), the Wangyang River (WR), and the Xiao River (XR), tributaries of the Ziya River system, northern China. The aim was to assess heavy metal contamination in the system and the associated environmental risks. The mean Cd, Cr, Cu, Ni, Pb, and Zn concentrations in all three tributaries were 0.373, 57.1, 37.7, 20.4, 14.0, and 90.6 μg/L, respectively. The calculated Cd, Cr, Cu, Ni, Pb, and Zn diffusion fluxes in the rivers were −0.427 to 0.469, −71.8 to 42.5, 3.16 to 86.6, 5.29 to 14.0, 7.24 to 19.0, and −204 to 21.9 μg/(m 2 day), respectively, showing that the pore water was a source of most of the metals to the water column. Only Cu and Pb in the XR and Cu in the WR exceeded the final chronic value recommended by the US Environmental Protection Agency, but the metals in the WR sediment could have caused toxic effects.These results are likely to be useful to the authorities responsible for sustainable river management.

show abstract

Section: Resultssupporting

confidence: 90%

Distributions, fluxes, and toxicities of heavy metals in sediment pore water from tributaries of the Ziya River system, northern China

Zhu

Shan

Li³

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…Sedimentary diagenetic processes across the sediment-water interface, such as diffusion, migration, and transformation, are significantly driven by redox geochemistry, and Mn or Fe could be a good indicator to reveal the status of sedimentary redox conditions (oxic, sub-oxic, or anoxic conditions; Kalnejais et al 2015). The peaks of Mn in the profiles show that the redox conditions facilitate the reductive dissolution of a fraction of Mn oxyhydroxide particles and their release into pore water (Campanha et al 2012). The thicknesses of suboxic layers from the northern bays (about 2-3 cm) were thinner than that (about 5 cm) at the central lake (CL) site.…”

Section: Resultsmentioning

confidence: 99%

“…The profiles of Ni and Zn at ZS showed concentrations progressively decreasing from top to bottom without showing layers of pronounced spikes in concentrations. Thus, these characteristics may be attributed to some other factors such as pH, redox conditions, sulfide concentration, occurrence of complexants, and dissolved organic carbon, which may have controlled the mobility of metals in the deeper layer of pore water, and these processes needed further research to identify other processes that govern metal mobility (Campanha et al 2012;Point et al 2007).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Distribution, diffusive fluxes, and toxicity of heavy metals and PAHs in pore water profiles from the northern bays of Taihu Lake

Lei

Zhang

Shan

et al. 2016

Environ Sci Pollut Res

View full text Add to dashboard Cite

Pore water plays a more significant role than do sediments in pollutant cycling dynamics. Also, concentrations of pollutants in pore water provide important information about their bioavailability or eco-toxicity; however, very few studies have focused on this topic. In this study, four duplicate sediment cores from three typical northern bays as well as the central part of Taihu Lake were collected to investigate the distribution, diffusive fluxes, and toxicity of heavy metals and polycyclic aromatic hydrocarbons (PAHs) in pore water profiles, which will be good in understanding the mobility and toxicity of these toxic pollutants and achieving better environmental management. The diffusive fluxes of heavy metals across the sediment-water interface was estimated through Fick's First Law, and the toxicity of heavy metals and PAHs in pore water was assessed by applying a water quality index (interstitial water toxicity criteria unit, IWCTU) and a hazard index (HI), respectively. The average concentrations of Cr, Cu, Ni, Pb, and Zn in surface pore water were 18.8, 23.4, 12.0, 13.5, and 42.5 μg L −1 , respectively. Also, concentrations of the selected heavy metals in both overlying water and pore water from Taihu Lake were all lower than the standard values of the environmental quality standards for surface water. The concentrations as the pore water depth increased, and the highest detected concentrations of heavy metals were recorded between 3 and 5 cm below the sediment surface. The average diffusive fluxes of these metals were 27.3, 24.8, 7.03, 7.81, and −3.32 μg (m 2 day) −1 , respectively, indicating export from sediment into overlying water, with the exception of Zn. There was a potential risk of toxicity, mainly from Pb and Cu, indicating that heavy metals in pore water had slight to moderate impact on sediment-dwelling organisms by values of the IWCTU and the Nemeraw index. The total PAH concentrations in pore water were higher than those in overlying water, and such gradient implies a potential flux of PAHs from pore water to overlying water. The average HI value of PAHs in surface pore water showed no or low ecological risk. While there may be occasional risk due to the HI values in some sites being greater than 1, the dominant contributors were carcinogenic PAHs. Because of their potential biological impact, heavy metals and PAHs and their comprehensive toxic effects in pore water should be given priority attention to keep the safety of Taihu Lake.

show abstract

“…• absorption by suspended particulate matter, co-precipitation, desorption (Campanha et al, 2012) and…”

Section: Arsenic Mobilisationmentioning

confidence: 99%

Investigating the elevated arsenic concentrations in the Gold Ridge tailings storage facility surface water

Jacob-Tatapu¹

View full text Add to dashboard Cite

Declaration by author This thesis is composed of my original work, and contains no material previously published or written by another person except where due reference has been made in the text. I have clearly stated the contribution by others to jointly-authored works that I have included in my thesis. I have clearly stated the contribution of others to my thesis as a whole, including statistical assistance, survey design, data analysis, significant technical procedures, professional editorial advice, financial support and any other original research work used or reported in my thesis. The content of my thesis is the result of work I have carried out since the commencement of my higher degree by research candidature and does not include a substantial part of work that has been submitted to qualify for the award of any other degree or diploma in any university or other tertiary institution. I have clearly stated which parts of my thesis, if any, have been submitted to qualify for another award. I acknowledge that an electronic copy of my thesis must be lodged with the University Library and, subject to the policy and procedures of The University of Queensland, the thesis be made available for research and study in accordance with the Copyright Act 1968 unless a period of embargo has been approved by the Dean of the Graduate School.

show abstract

Metal fluxes at the sediment–water interface in rivers in the Turvo/Grande drainage basin, São Paulo State, Brazil

Cited by 13 publications

References 34 publications

Distributions, fluxes, and toxicities of heavy metals in sediment pore water from tributaries of the Ziya River system, northern China

Distributions, fluxes, and toxicities of heavy metals in sediment pore water from tributaries of the Ziya River system, northern China

Distribution, diffusive fluxes, and toxicity of heavy metals and PAHs in pore water profiles from the northern bays of Taihu Lake

Investigating the elevated arsenic concentrations in the Gold Ridge tailings storage facility surface water

Contact Info

Product

Resources

About