Cu and Zn adsorption to a heterogeneous natural sediment: Influence of leached cations and natural organic matter

Fisher-Power, Leanne M.; Cheng, Tao; Rastghalam, Zahra Sadat

doi:10.1016/j.chemosphere.2015.10.109

Cited by 41 publications

(9 citation statements)

References 29 publications

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“…In addition, the ratio of PN to PS was found to gradually increase during the operations of the UASB reactor. Other studies also report the presence of toxic metals and chemicals which stimulated production of EPS, yielding more PN than PS 35 36 37 38 39 40 41 42 43 44 45 46 47 . EPS formed a protective shield for the microbial cells against adverse influences from the external environment 38 .…”

Section: Resultsmentioning

confidence: 97%

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An Exploratory Study on the Pathways of Cr (VI) Reduction in Sulfate-reducing Up-flow Anaerobic Sludge Bed (UASB) Reactor

Qian

Liu

et al. 2016

Sci Rep

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Electroplating wastewater contains both Cr (VI) and sulfate. So Cr (VI) removal under sulfate-rich condition is quite complicated. This study mainly investigates the pathways for Cr (VI) removal under biological sulfate-reducing condition in the up-flow anaerobic sludge bed (UASB) reactor. Two potential pathways are found for the removal of Cr (VI). The first one is the sulfidogenesis-induced Cr (VI) reduction pathway (for 90% Cr (VI) removal), in which Cr (VI) is reduced by sulfide generated from biological reduction of sulfate. The second one leads to direct reduction of Cr (VI) which is utilized by bacteria as the electron acceptor (for 10% Cr (VI) removal). Batch test results confirmed that sulfide was oxidized to elemental sulfur instead of sulfate during Cr (VI) reduction. The produced extracellular polymeric substances (EPS) provided protection to the microbes, resulting in effective removal of Cr (VI). Sulfate-reducing bacteria (SRB) genera accounted for 11.1% of the total bacterial community; thus they could be the major organisms mediating the sulfidogenesis-induced reduction of Cr (VI). In addition, chromate-utilizing genera (e.g. Microbacterium) were also detected, which were possibly responsible for the direct reduction of Cr (VI) using organics as the electron donor and Cr (VI) as the electron acceptor.

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Section: Resultsmentioning

confidence: 97%

“…Metals can be removed in bioreactors via weak adsorption onto organic substrates 40 . However, in this study no loss of Cr (VI) was found through adsorption ( Fig.…”

Section: Resultsmentioning

confidence: 99%

An Exploratory Study on the Pathways of Cr (VI) Reduction in Sulfate-reducing Up-flow Anaerobic Sludge Bed (UASB) Reactor

Qian

Liu

et al. 2016

Sci Rep

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“…The relative heavy metal adsorption properties of compost were in the following order: Pb 2+ > Cu 2+ > Zn 2+ [21,22]. The heavy metal adsorption based on the Langmuir isotherm was the same [22][23][24]. Their research has shown that composts with smaller particles have better adsorption properties.…”

Section: Adsorption Efficiencymentioning

confidence: 97%

Review of Heavy Metal Adsorption Processes by Several Organic Matters from Wastewaters

Czikkely

Neubauer

Fekete

et al. 2018

Water

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Heavy metal contamination of natural rivers and wastewaters is a problem for both the environment and human society. The accumulation and adsorption of heavy metals could happen with several organic and inorganic matters, but the most used adsorbents are (biological and chemical) organic compounds. This review article presents the basics of heavy metal adsorption on several organic surfaces. There are many organic matters, which seem to be useful as agents for heavy metal adsorption. All of the cited authors and articles present the adsorption kinetics by the most used isotherm models (such as Langmuir and Freundlich isotherms). By comparing several research results presented by a pre-selected assortment of papers, we would like to give an overview of the microbiological, organic chemical, and other surface adsorption possibilities. We draw conclusions for two new adsorption fields (adsorption with biosorbent and artificial materials). We present an optional possibility to study adsorption kinetics, efficiency and regeneration methods to successfully conclude the heavy metal treatment process, and we make some recommendations about the efficient water usage calculations using the water allowance coefficient (WAC) indicator.

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“…It is likely that the more carbon-rich topsoil at the high wall location contains more plant-derived organic carbon, which can mobilize Al and Fe from the shallow high wall soils despite the slightly higher pH compared to the mine spoil soil [80]. Although high DOC can result in leaching of Cu and Zn [81], only elevated Cu was detected in the shallow high wall soil pore water. It is possible that lower soil pore water pH values might be required to promote DOC-leaching of Zn [82].…”

Section: Relationship Between Soil Pore Water and Solid-phase Compositionmentioning

confidence: 99%

Biogeochemical Controls on the Potential for Long-Term Contaminant Leaching from Soils Developing on Historic Coal Mine Spoil

et al. 2020

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Coal mine spoil is widespread in US coal mining regions, and the potential long-term leaching of toxic metal(loid)s is a significant and underappreciated issue. This study aimed to determine the flux of contaminants from historic mine coal spoil at a field site located in Appalachian Ohio (USA) and link pore water composition and solid-phase composition to the weathering reaction stages within the soils. The overall mineralogical and microbial community composition indicates that despite very different soil formation pathways, soils developing on historic coal mine spoil and an undisturbed soil are currently dominated by similar mineral weathering reactions. Both soils contained pyrite coated with clays and secondary oxide minerals. However, mine spoil soil contained abundant residual coal, with abundant Fe- and Mn- (oxy)hydroxides. These secondary phases likely control and mitigate trace metal (Cu, Ni, and Zn) transport from the soils. While Mn was highly mobile in Mn-enriched soils, Fe and Al mobility may be more controlled by dissolved organic carbon dynamics than mineral abundance. There is also likely an underappreciated risk of Mn transport from coal mine spoil, and that mine spoil soils could become a major source of metals if local biogeochemical conditions change.

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Cu and Zn adsorption to a heterogeneous natural sediment: Influence of leached cations and natural organic matter

Cited by 41 publications

References 29 publications

An Exploratory Study on the Pathways of Cr (VI) Reduction in Sulfate-reducing Up-flow Anaerobic Sludge Bed (UASB) Reactor

An Exploratory Study on the Pathways of Cr (VI) Reduction in Sulfate-reducing Up-flow Anaerobic Sludge Bed (UASB) Reactor

Review of Heavy Metal Adsorption Processes by Several Organic Matters from Wastewaters

Biogeochemical Controls on the Potential for Long-Term Contaminant Leaching from Soils Developing on Historic Coal Mine Spoil

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