Removal of Arsenic (V) from Aqueous Solutions Using Chitosan–Red Scoria and Chitosan–Pumice Blends
| Autor: | Dejene A. Tessema, Christian V. Stevens, Gijs Du Laing, Fekadu Fufa, Stein Mincke, Tsegaye Girma Asere, Kim Verbeken, Jeriffa De Clercq |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
THERMODYNAMIC ASPECTS
ADSORPTION Health Toxicology and Mutagenesis DRINKING-WATER 0211 other engineering and technologies lcsh:Medicine AS(V) 02 engineering and technology 010501 environmental sciences 01 natural sciences METHYLENE-BLUE Chitosan chemistry.chemical_compound AS(III) red scoria pumice chitosan arsenic adsorption CROSS-LINKED CHITOSAN Groundwater geography.geographical_feature_category Aqueous solution Chemistry Langmuir adsorption model symbols HEXAVALENT CHROMIUM Mineralogy chemistry.chemical_element Article Water Purification symbols.namesake Adsorption Pumice KINETICS Arsenic 0105 earth and related environmental sciences 021110 strategic defence & security studies geography Silicates lcsh:R Public Health Environmental and Occupational Health OXIDE Volcanic rock Earth and Environmental Sciences Scoria Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | International Journal of Environmental Research and Public Health; Volume 14; Issue 8; Pages: 895 International Journal of Environmental Research and Public Health INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH International Journal of Environmental Research and Public Health, Vol 14, Iss 8, p 895 (2017) |
| ISSN: | 1660-4601 |
| DOI: | 10.3390/ijerph14080895 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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