Binding strength-associated toxicity reduction by birnessite and hydroxyapatite in Pb and Cd contaminated sediments

Lee, Seungbae; An, Jinsung; Kim, Young‐Jin; Nam, Kyoungphile

doi:10.1016/j.jhazmat.2010.12.126

Cited by 23 publications

(9 citation statements)

References 41 publications

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“…Recently, studies focusing on the bioavailability of heavy metals are shifted from the total metal concentrations to their chemical species (Dacera and Babel, 2012;Han et al, 2014;Lee et al, 2011;Moreda-Piñeiro et al, 2012). The chemical forms of heavy metals in ambient are defined as five fractions: exchangeable, carbonate, iron-manganese oxides, organic matter and residual (Tessier et al, 1979).…”

Section: Heavy Metals Concentration and Their Chemical Formsmentioning

confidence: 99%

Effects of sediment geochemical properties on heavy metal bioavailability

Zhang

Zeng

et al. 2014

Environment International

660

206

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As the largest container and resource of metals, sediment has a special role in the fate of metals. Factors influencing bioavailability of heavy metals in sediment have never been comprehensively considered and the sediment properties still fail to understand and even controversial. In this review, the mechanisms of sediment properties such as acid-volatile sulfides (AVS), organic matter, texture (clay, silt or sand) and geology, organism behaviors as well as those influencing the bioavailability of metals were analyzed. Under anoxic condition, AVS mainly reduce the solubility and toxicity of metals, while organic matters, Fe-Mn oxides, clay or silt can stabilize heavy metals in elevated oxidative-reductive potential (ORP). Other factors including the variation of pH, redox potential, aging as well as nutrition and the behavior of benthic organism in sediment also largely alter metals mobility and distribution. These factors are often inter-related, and various toxicity assessment methods used to evaluate the bioavailability of trace metals have been also discussed. Additionally, we expect that some novel synthetic materials like polysulfides, nano-materials, provide the substantial amendments for metals pollution in sediment.

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Section: Heavy Metals Concentration and Their Chemical Formsmentioning

confidence: 99%

Effects of sediment geochemical properties on heavy metal bioavailability

Zhang

Zeng

et al. 2014

Environment International

660

206

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“…Apatite and ferrihydrite composite was found by Qian et al (2009) to considerably lower the bioavailability and toxicity of Pb, Zn, Cd, and Ni in sediment by retarding oxidation of volatile sulfide. Lee et al (2011) investigated the performance of birnessite, hydroxyapatite, and zeolite as stabilizing agents of Pb and Cd in sediment. More than 99 and 70 % of Pb and Cd, respectively, became nonreadily extractable fractions by the addition of birnessite and hydroxyapatite.…”

Section: Introductionmentioning

confidence: 99%

Investigation of heavy metal (Cu, Pb, Cd, and Cr) stabilization in river sediment by nano-zero-valent iron/activated carbon composite

Chen

Zhang

et al. 2015

Environ Sci Pollut Res

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Nano-zero-valent iron/activated carbon (nZVI/AC) composite was evaluated for its effectiveness in the stabilization of Cu, Pb, Cd, and Cr in dredged river sediment. Synthetic precipitation leaching procedure (SPLP) and toxicity characteristic leaching procedure (TCLP) were adopted to compare the effects of nZVI/AC dosage, particle size, time duration, and temperature on heavy metal leachability. The results show that leachability dropped considerably with the addition of nZVI/AC and powdered particles in the size of 0.075-0.18 mm was more effective in stabilization than granular ones. Stabilization effect was stable in long-term and robust against changes in temperature. Tessier sequential extraction revealed that heavy metals were associated with solid particle, inorganic or organic matters in sediment. The addition of nZVI/AC was able to convert relatively weakly bound heavy metals into more strongly bound species and thus reduce the bioavailability and toxicity. Also, the standard potential of heavy metals may decide the mechanism of stabilization process.

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“…In the wastewater the pH is 2, the temperature of 30 ℃, the immobilization of lead ions reach equilibrium in 15min, and the fixed quantity reach 1482 ± 137 mg/g, much more than most of the report [5].…”

Section: International Conference On Materials Environmental and Biomentioning

confidence: 85%

Research on Treating Wastewater Containing Heavy Metal by Biological Immobilization

Li¹,

Zhang²,

Chen³

et al. 2015

Proceedings of the 2015 International Conference on Materials, Environmental and Biological Engineering

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Abstract. Biological immobilized technology is considered a potential instrument for the removal of heavy metals from waste solutions and for precious heavy metals recovery, an alternative to the conventional processes, such as those based on ion exchange, or adsorption on activated carbon. In this work the state of the art of treating wastewater containing lead, cadmium and chromium and other metals by the method of biological immobilization is presented and results found in literature are compared. It had been demonstrated that heavy metal can be effectively removed by biological immobilization, which had great potential advantages of less cells loss, easily controlling, high efficiency, together with the great economical and environmental merit of recover scarce metal resources.

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Binding strength-associated toxicity reduction by birnessite and hydroxyapatite in Pb and Cd contaminated sediments

Cited by 23 publications

References 41 publications

Effects of sediment geochemical properties on heavy metal bioavailability

Effects of sediment geochemical properties on heavy metal bioavailability

Investigation of heavy metal (Cu, Pb, Cd, and Cr) stabilization in river sediment by nano-zero-valent iron/activated carbon composite

Research on Treating Wastewater Containing Heavy Metal by Biological Immobilization

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