Adsorption of dyes using different types of clay: a review
By A. A. Adeyemo, I. Adeoye, O. Bello. Applied Water Science, 2017
622 citations recorded by the source corpus.
Increasing amount of dyes in the ecosystem particularly in wastewater has propelled the search for more efficient low-cost adsorbents. The effective use of the sorption properties (high surface area and surface chemistry, lack of toxicity and potential for ion exchange) of different clays as adsorbents for the removal of different type of dyes (basic, acidic, reactive) from water and wastewater as potential alternatives to activated carbons has recently received widespread attention because of the environmental-friendly nature of clay materials. Insights into the efficiencies of raw and modified/activated clay adsorbents and ways of improving their efficiencies to obtain better results are discussed. Acid-modified clay resulted in higher rate of dye adsorption and an increased surface area and porosity (49.05 mm2 and 53.4 %). Base-modified clay has lower adsorption capacities, while ZnCl2-modified clay had the least rate of adsorption with a surface area of 44.3 mm2 and porosity of 43.4 %. This review also explores the grey areas of the adsorption properties of the raw clays and the improved performance of activated/modified clay materials with particular reference to the effects of pH, temperature, initial dye concentration and adsorbent dosage on the adsorption capacities of the clays. Various challenges encountered in using clay materials are highlighted and a number of future prospects for the adsorbents are proposed.
Subfields: Industrial and Manufacturing Engineering, Organic Chemistry, Water Science and Technology
View Paper: https://www.semanticscholar.org/paper/3cccf8d8004228e259b0e5681f47d2045d10df19
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In Organic Chemistry
In Water Science and Technology
Citations in the corpus
- Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review (2019, methodology): “Among these methods, adsorption and catalysis have been considered as the most acceptable and efficient dye removal approaches because of the high efficiency, low cost and easy operation (Adeyemo et al. 2015).”