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Removal of arsenic (V) from aqueous solutions using chitosan-red scoria and chitosan-pumice blends

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Abstract
In different regions across the globe, elevated arsenic contents in the groundwater constitute a major health problem. In this work, a biopolymer chitosan has been blended with volcanic rocks (red scoria and pumice) for arsenic (V) removal. The effect of three blending ratios of chitosan and volcanic rocks (1:2, 1:5 and 1:10) on arsenic removal has been studied. The optimal blending ratio was 1:5 (chitosan:volcanic rocks) with maximum adsorption capacity of 0.72 mg/g and 0.71 mg/g for chitosan:red scoria (Ch-Rs) and chitosan:pumice (Ch-Pu), respectively. The experimental adsorption data fitted well a Langmuir isotherm (R-2 > 0.99) and followed pseudo-second-order kinetics. The high stability of the materials and their high arsenic (V) removal efficiency (similar to 93%) in a wide pH range (4 to 10) are useful for real field applications. Moreover, the blends could be regenerated using 0.05 M NaOH and used for several cycles without losing their original arsenic removal efficiency. The results of the study demonstrate that chitosan-volcanic rock blends should be further explored as a potential sustainable solution for removal of arsenic (V) from water.
Keywords
red scoria, pumice, chitosan, arsenic, adsorption, CROSS-LINKED CHITOSAN, DRINKING-WATER, THERMODYNAMIC ASPECTS, HEXAVALENT CHROMIUM, METHYLENE-BLUE, ADSORPTION, OXIDE, AS(V), KINETICS, AS(III)

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Chicago
Asere, Tsegaye Girma, Stein Mincke, Jeriffa De Clercq, Kim Verbeken, Dejene A Tessema, Fekadu Fufa, Christian Stevens, and Gijs Du Laing. 2017. “Removal of Arsenic (V) from Aqueous Solutions Using Chitosan-red Scoria and Chitosan-pumice Blends.” International Journal of Environmental Research and Public Health 14 (8).
APA
Asere, T. G., Mincke, S., De Clercq, J., Verbeken, K., Tessema, D. A., Fufa, F., Stevens, C., et al. (2017). Removal of arsenic (V) from aqueous solutions using chitosan-red scoria and chitosan-pumice blends. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH, 14(8).
Vancouver
1.
Asere TG, Mincke S, De Clercq J, Verbeken K, Tessema DA, Fufa F, et al. Removal of arsenic (V) from aqueous solutions using chitosan-red scoria and chitosan-pumice blends. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH. 2017;14(8).
MLA
Asere, Tsegaye Girma, Stein Mincke, Jeriffa De Clercq, et al. “Removal of Arsenic (V) from Aqueous Solutions Using Chitosan-red Scoria and Chitosan-pumice Blends.” INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 14.8 (2017): n. pag. Print.
@article{8535431,
  abstract     = {In different regions across the globe, elevated arsenic contents in the groundwater constitute a major health problem. In this work, a biopolymer chitosan has been blended with volcanic rocks (red scoria and pumice) for arsenic (V) removal. The effect of three blending ratios of chitosan and volcanic rocks (1:2, 1:5 and 1:10) on arsenic removal has been studied. The optimal blending ratio was 1:5 (chitosan:volcanic rocks) with maximum adsorption capacity of 0.72 mg/g and 0.71 mg/g for chitosan:red scoria (Ch-Rs) and chitosan:pumice (Ch-Pu), respectively. The experimental adsorption data fitted well a Langmuir isotherm (R-2 {\textrangle} 0.99) and followed pseudo-second-order kinetics. The high stability of the materials and their high arsenic (V) removal efficiency (similar to 93\%) in a wide pH range (4 to 10) are useful for real field applications. Moreover, the blends could be regenerated using 0.05 M NaOH and used for several cycles without losing their original arsenic removal efficiency. The results of the study demonstrate that chitosan-volcanic rock blends should be further explored as a potential sustainable solution for removal of arsenic (V) from water.},
  articleno    = {895},
  author       = {Asere, Tsegaye Girma and Mincke, Stein and De Clercq, Jeriffa and Verbeken, Kim and Tessema, Dejene A and Fufa, Fekadu and Stevens, Christian and Du Laing, Gijs},
  issn         = {1660-4601},
  journal      = {INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH},
  keyword      = {red scoria,pumice,chitosan,arsenic,adsorption,CROSS-LINKED CHITOSAN,DRINKING-WATER,THERMODYNAMIC ASPECTS,HEXAVALENT CHROMIUM,METHYLENE-BLUE,ADSORPTION,OXIDE,AS(V),KINETICS,AS(III)},
  language     = {eng},
  number       = {8},
  pages        = {19},
  title        = {Removal of arsenic (V) from aqueous solutions using chitosan-red scoria and chitosan-pumice blends},
  url          = {http://dx.doi.org/10.3390/ijerph14080895},
  volume       = {14},
  year         = {2017},
}

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