Use of neutralized industrial residue to stabilize trace elements (Cu, Cd, Zn, As, Mo, and Cr) in marine dredged sediment from South-East of France

Taneez, Mehwish; Marmier, Nicolas; Hurel, Charlotte

doi:10.1016/j.chemosphere.2016.02.014

Cited by 24 publications

(3 citation statements)

References 32 publications

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“…A variety of technologies, including physical/mechanical [11], chemical [12,13], and biological technologies (phytoremediation and microbial remediation) [14,15], have been applied in the remediation of dredged marine sediments contaminated by metals. Among the various chemical remediation technologies, immobilization is considered a promising and alternative option due to its significant effect, low cost, and environmental friendliness [16]. The method involves the addition of chemicals to convert the mobile and bioavailable fractions of metals into stable fractions [17].…”

Section: Introductionmentioning

confidence: 99%

An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China

Zhang

Xiao

Liu

2019

JMSE

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The remediation of dredged marine sediments contaminated by metals has drawn increasing attention globally. Immobilization was regarded as a promising method for reducing adverse impacts on marine ecosystems. In this study, kaolinite and limestone were used as amendments to immobilize Zn, Pb, and Cu in dredged marine sediments, which were collected from the coastal zone adjacent to Tianjin Port in Bohai Bay. The sequential extraction procedure was applied to identify the mobility of metals and, further, to evaluate the immobilization effect of the amendments. The physical–chemical properties of the sediments, such as the pH, electrical conductivity (EC), salinity, and total organic carbon (TOC), were also measured to better understand their influence on the three metals’ mobility. The results of the sequential extraction procedure indicated that the mobile fractions of the metals were converted into relatively stable fractions because of the two amendments. In addition, the EC, salinity, and TOC decreased moderately, while no obvious variations in the pH of the sediments were observed with the addition of kaolinite and limestone. It was confirmed that both kaolinite and limestone can effectively reduce the mobility and bioavailability of metals, particularly Zn, and limestone generally has a better immobilization effect, compared with kaolinite.

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Section: Introductionmentioning

confidence: 99%

An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China

Zhang

Xiao

Liu

2019

JMSE

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“…The ability of Portland cement to improve the sediments' geotechnical characteristics (Wang et al, 2012;Zentar et al, 2012) and immobilise contaminants has been widely documented (Xue et al, 2017;Wang et al, 2018). However, there are some cases in which the mobility of contaminants in marine sediments does not reduce when treated with either lime and cement or additives (Taneez et al, 2016;Xu, 2017). Overall, most studies to date have focused on individual parameters and there remains a lack of systematic research considering the combination of factors affecting the properties of stabilised sediments in a unified way.…”

Section: Traditional Chemical Reagentsmentioning

confidence: 99%

Characterisation, remediation and valorisation of contaminated sediments: a critical review

Singh,

Vitone,

Baudet

et al. 2023

Environmental Geotechnics

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The constraints associated with the availability of huge amounts of natural resources for infrastructure and agricultural development calls for the reuse and recycling of anthropogenically created geomaterials, which is in line with the UN Sustainable Development Goals. In this context, valorization of dredged sediments (DS), obtained from water bodies such as rivers, lakes, oceans, etc., as a resource material is worth considering. Unfortunately, DS might be contaminated and exhibit a higher moisture-holding capacity due to higher organic matter and clay minerals/colloids. These attributes pose a serious question towards dumping of the DS in the deep sea (in the case of marine sediments), a practice which though prevails presently but endangers marine life. Hence, the way forward would be to characterize them holistically, followed by adequate treatment to make them ecologically synergetic before developing a strategy for their valorization. In this regard, many studies have been focused on the characterization and treatment of DS to make them environmentally safe manmade resource. With this in view, a critical synthesis of the published literature pertaining to the (i) characterization, (ii) treatment, remediation, and immobilization of contaminants, and (iii) utilization of DS has been conducted, and the salient findings are presented in this paper. Based on this study, it was observed that the DS acts as a sink for emerging contaminants for which no remediation strategies are available. Moreover, the study highlighted the lacuna in upscaling the existing treatment and stabilization techniques to field conditions while highlighting the concept of circular economy.

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“…A variety of technologies including physical/mechanical [11], chemical [12,13], and biological technologies (phytoremediation and microbial remediation) [14,15] have been applied in remediation of dredged marine sediments contaminated by heavy metals. Of various chemical remediation technologies, immobilization is considered as a promising and alternative option as its high effect, low expenditure and environmental friendliness [16]. The method involves the addition of chemicals to convert mobile and bioavailable fractions of metals into stable fractions [17].…”

Section: Introductionmentioning

confidence: 99%

The ex-situ immobilization experiment of heavy metals in dredged marine sediments from Bohai Bay, China

Zhang¹,

Xiao²,

Liu³

2019

Preprint

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The remediation of dredged marine sediments contaminated by heavy metals has drawn increasing attention worldly. The immobilization was regarded as a promising method to reduce adverse impacts on marine ecosystem. In this study, kaolinite and limestone were used as amendments to immobilize heavy metals (e.g. Zn, Pb and Cu) respectively in dredged marine sediments collected from the coastal zone adjacent to Tianjin Port in Bohai Bay. The sequential extraction procedure was applied to identify the mobility of heavy metals and further to evaluate the immobilization effect of amendments. The physical-chemical properties of sediments, such as pH, electrical conductivity (EC), salinity, and total organic carbon (TOC), were also measured to better understand their influence on heavy metals’ mobility. In addition, the compositions of clay minerals were also analyzed to identify the transformation process of minerals in the sediments. The results of sequential extraction procedure indicated that mobile fractions of heavy metals were converted into relatively stable fractions because of the two amendments. In addition, EC, salinity and TOC decreased moderately while no obvious variations of pH in the sediments were observed with the addition of the the kaolinite and the limestone. The percentage of montmorillonite decreased to minimum value while that of chlorite increased gradually during the experimental periods for 40 days probably due to complexation reaction. It was confirmed that both kaolinite and limestone can effectively reduce the mobility and bioavailability of heavy metals, particularly for Zn, generally, limestone has a better immobilization effect compared with kaolinite.

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Use of neutralized industrial residue to stabilize trace elements (Cu, Cd, Zn, As, Mo, and Cr) in marine dredged sediment from South-East of France

Cited by 24 publications

References 32 publications

An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China

An Ex-Situ Immobilization Experiment with Zn, Pb, and Cu in Dredged Marine Sediments from Bohai Bay, China

Characterisation, remediation and valorisation of contaminated sediments: a critical review

The ex-situ immobilization experiment of heavy metals in dredged marine sediments from Bohai Bay, China

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