Adsorption of copper to different biogenic oyster shell structures

Wu, Qiong; Chen, Jie; Clark, Malcolm W.; Yu, Yan

doi:10.1016/j.apsusc.2014.05.054

Cited by 92 publications

(54 citation statements)

References 39 publications

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“…11c), new peaks assigned to Cu 2p (936.1 eV) and Cr 2p (578.9 eV) appear after the adsorption experiment (Fig. Firstly, the silanol on the surface of PCSH can adsorb the Cu(II) ions via electrostatic interactions as described by the following: 21 2(Si-OH) + Cu 2+ -(Si-O À ) 2 Á Á ÁCu 2+ + 2H + (8) In addition, four amine groups (-NH-, -NH 2 ) from PEI can donate electrons and chelate the Cu(II) ion via coordination interactions. 30,43 Fig.…”

Section: Adsorption Mechanismmentioning

confidence: 98%

“…[4][5][6][7] Over the past few decades, the adsorption method involving nanomaterials, metal organic frameworks, polymers, functionalized silica, etc. 21,22 Recently, numerous research efforts have focused on the use of the biogenerated waste to produce functional materials for environmental applications. [8][9][10][11][12][13][14][15][16][17][18][19] In this regard, inorganic hierarchical nanostructures assembled by nanoparticles (0D), nanofibers (1D) and nanofilms (2D), have showed remarkable potential for application in water treatment.…”

Section: Introductionmentioning

confidence: 99%

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Functionalized calcium silicate nanofibers with hierarchical structure derived from oyster shells and their application in heavy metal ions removal

You

Hong

Zhang

et al. 2016

Phys. Chem. Chem. Phys.

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Inorganic hierarchical nanostructures have remarkable potential applications in environmental metal remediation; however, their applications usually suffer from low capacity, high cost, and difficulties in the recycling of adsorbents. We previously reported a facile strategy to synthesize acid-insoluble calcium silicate hydrates (CSH) from oyster shells, a representative kind of biowaste. However, little is known of the structure, size, and morphology of the as-prepared CSH, which hampers the improvement of their adsorption capacities. In this work, systematic investigation of the structures of as-generated CSH demonstrate that they have a hierarchically porous structure composed of thin nano-sheets, where each nano-sheet is assembled by nano-fibers with width of around ten nanometers. The hierarchical nanostructures with pore size of ∼12 nm provide a significant amount of active sites to graft polyethyleneimine (PEI), which enables the efficient extraction of both Cu(ii) cations and Cr(vi) anions from the aqueous solution. Batch experiments further indicate that the PEI-modified PCSH exhibit a maximum adsorption capacity of 203 and 256 mg g(-1) for Cu(ii) and Cr(vi), respectively, much higher than that of CSH, OS and many other adsorbents in literature. The adsorption of Cu(ii) and Cr(vi) proved to be spontaneous and exothermic. Combining the pH-dependent experiments with X-ray photoelectron spectroscopy analysis, the underlying mechanism is discussed. PCSH derived from OS biowaste maintains an efficient extraction ability toward Cu(ii) and Cr(vi) after five adsorption-desorption cycles. It is also applicable for treating various kinds of heavy metal ions and organic pollutants, showing potentially wide applications in water treatment.

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Section: Adsorption Mechanismmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Functionalized calcium silicate nanofibers with hierarchical structure derived from oyster shells and their application in heavy metal ions removal

You

Hong

Zhang

et al. 2016

Phys. Chem. Chem. Phys.

Self Cite

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“…Cu 2+ uptake was followed by the greatest pH decrease relative to the amount of sorbed cation. A decline in pH with increasing Cu 2+ concentration was also observed considering sorption onto oyster shell structures (data not reported) …”

Section: Resultsmentioning

confidence: 65%

“…Previous research in relation to applications of seashells have also been directed towards immobilization of heavy metals, such as Pb, Cd, Cu, Zn, Ni, Co, from aqueous phase . Shell species commonly explored in sorption studies were oyster and mussel shells, due to their vast amounts from the fishery industry.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste

Egerić

Smičiklas

Mraković

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Seashell waste (SW) is rich in biogenic calcium carbonate and potentially can substitute geological sources in various applications, such as the separation of heavy metals and radionuclides from contaminated solutions. This study aims to compare SW sorption efficiency towards different chemical species (Cu2+, Zn2+, Pb2+ and Sr2+) and to evaluate the effects of various factors based on the experimental data and modeling approach. RESULTS The reaction of SW with aqueous metal solutions is a combination of several processes that result in metal retention, Ca2+ release, and changes in pH. SW demonstrates variable selectivity for investigated cations, depending on their concentrations and reaction times. Maximum sorption capacities declined in the order Zn2+ > Pb2+ ≈ Sr2+ > Cu2+. The model based on general regression neural network (GRNN) architecture was developed, which enabled prediction of removal efficiency taking into account the process specific, metal specific parameters and their non‐linear interactions. Initial concentration and covalent radius of a cation exhibit the highest, while the initial pH the lowest significance. CONCLUSION Ecological problems caused by SW accumulation in coastal areas could be mitigated by mastering technologies for their practical utilization. The results obtained facilitate the understanding of cationic pollutants removal by SW in the range of experimental conditions, while the GRNN approach demonstrates advantages in modeling complex sorption processes. © 2017 Society of Chemical Industry

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“…Du at al. (Du et al, 2011) and Sipos et al (Sipos et al, 2008), investigating the adsorption of Cd, Pb and Zn on soil mineral phases found that alkaline conditions due to the carbonate content of soils resulted both in increased adsorption on the mineral particles for Cu, and in enhanced role of precipitation for all the studied metals, and they indicate that in this case not the adsorption but the precipitation is the most important immobilization process (Filiz, 2007;Ghasemi et al, 2013;Wu et al, 2014). …”

Section: Factorial Design Evaluationmentioning

confidence: 99%

Immobilisation and Leaching Performance of Lead-Acid Batteries Smelting Slag Using Natural and Waste Materials

2017

Global NEST Journal

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The slag generated in the rotary furnaces is classified hazardous waste. In this regard, landfill disposal of lead smelting slag is not feasible since a few hundred tons are produced per year; leaching of heavy metals into ground water is of concern. The release of heavy metals into the environment has resulted in a number of environmental problems. The disposal of slag is becoming more expensive each year due to large land areas needed for its disposal. The best way to solve the disposal problem of waste materials is to decrease the quantity for disposal with utilization of waste materials in the industry. The toxicity of the waste is determined by leaching tests and depending on the characteristics of the waste the spent abrasive must be disposed of as solid or hazardous waste. The aim of this study is to investigate leaching characteristics of lead smelting slag according to leaching tests such as TCLP, and TS EN 12457-4 tests methods. In this study, mixed-level factorial design was applied to optimize process parameters for lead removal from lead smelting slag using natural (sepiolite, montmorillonite, illite and seashell) and waste material (red mud). The established model was then used as a predictor to achieve better understanding of the adsorption process and to obtain optimal settings of the experimental factors. The present study includes the safe disposal of lead smelting slag using natural and waste materials. Experimental results indicated that red mud and seashell can be used as environmentally friendly adsorbents that are capable of lead release from lead smelting slag.

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Adsorption of copper to different biogenic oyster shell structures

Cited by 92 publications

References 39 publications

Functionalized calcium silicate nanofibers with hierarchical structure derived from oyster shells and their application in heavy metal ions removal

Functionalized calcium silicate nanofibers with hierarchical structure derived from oyster shells and their application in heavy metal ions removal

Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste

Immobilisation and Leaching Performance of Lead-Acid Batteries Smelting Slag Using Natural and Waste Materials

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