Stabilization of heavy metal contaminated marine sediments with red mud and apatite composite

Shin, Woo-Seok; Kim, Young-Kee

doi:10.1007/s11368-015-1279-z

Cited by 43 publications

(11 citation statements)

References 40 publications

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“…The most extensively applied amendments in marine sediments include iron-bearing materials, aluminosilicates, phosphates, and clay minerals [17,24]. For example, cement [25], lime [26], red mud, and apatite composite [27] were used for the remediation of polluted coastal sediments in Romania, Norway, and the Republic of Korea, respectively. While various kinds of amendments are being used, clay minerals have been extensively utilized for the immobilization of metals due to their simplicity of use, significant effect, and universal applicability [28].…”

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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“…49 As the geopolymer content increased, heavy metals entered the structure system of the solidied blocks through chemical bonding or physical coating; consequently, the content of residual fraction increased gradually. 50 3.2.4 Analysis of solidication mechanism. The IR spectrum of remolded soils is shown in Fig.…”

Section: Effect and Mechanism Of Remolded Soilsmentioning

confidence: 99%

Barrier effect of coal bottom ash-based geopolymers on soil contaminated by heavy metals

et al. 2019

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“…Its disposal is problematic, requiring large land areas and overloading the alumina's production cost [3]. During the years, many investigations have been performed aiming for a low cost and environmental friendly treatment and utilization of BR in numerous uses [4][5][6], such as an agent in building and constructing materials [7][8][9][10], an agent in the ceramic and glass industry [11][12][13], as an adsorbent for pollutant removal from water and wastewater or in pigments [14][15][16][17][18][19], as a coagulant for waste and water treatment [20][21][22], an absorbent of waste acidic gases [23][24][25], an agent for neutralizing acidic waste and raw materials of low cost for the recovery of valuable elements [26][27][28][29][30][31][32][33][34][35][36][37][38], in catalysts [39,40], and as an agent for soil remediation [41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Optimizing Conditions for Scandium Extraction from Bauxite Residue Using Taguchi Methodology

et al. 2019

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Bauxite residue is the voluminous by-product of alumina production after Bayer process. Its high alkalinity causes disposal problems and harmful environmental impacts. However, the residue contains significant amounts of valuable elements, such as rare earth elements, including scandium. Greek bauxite residue contains a high amount of scandium close to its main resources. Taking into account scandium’s limited availability coupled with its high demand in modern technology, bauxite residue could be considered as a potential resource for scandium recovery. In this study, the optimization of scandium extraction from bauxite residue with sulfuric acid is investigated using Taguchi methodology. Based on previous studies, acid molarity, leaching time, solid/liquid ratio, and reaction temperature were selected as control parameters for the selective Sc recovery. Method optimization targeted the highest concentration of scandium combined with the lowest concentration of iron without taking into account application constraints. Maximization of scandium concentration can be achieved only by reduced selectivity. The predicted values resulted from the Taguchi methodology were affirmed by a confirmation experiment conducted at optimal conditions. Regression analysis provided the respective equations to be applied on several conditions, depending on different applications.

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Stabilization of heavy metal contaminated marine sediments with red mud and apatite composite

Cited by 43 publications

References 40 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

Barrier effect of coal bottom ash-based geopolymers on soil contaminated by heavy metals

Optimizing Conditions for Scandium Extraction from Bauxite Residue Using Taguchi Methodology

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