Journal ArticleDOI
Removal of chromium(VI) from aqueous solutions using rubber leaf powder: batch and column studies
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TLDR
In this paper, the effects of pH, adsorbent dose, contact time, initial metal ion concentration, and temperature on removal of chromium(VI) were studied in batch process.Abstract:
Chromium metal is found in industrial wastewater at a much higher concentration than the prescribed limit set by different regulatory authorities. Since chromium(VI) is very toxic and carcinogenic, it requires removal at source, that is, before its discharge to the water bodies. The present study is carried out for removal of Cr(VI) from aqueous solution by using locally available rubber leaf as a low-cost adsorbent in batch and continuous column mode. The effects of pH, adsorbent dose, contact time, initial metal ion concentration, and temperature on removal of Cr(VI) were studied in batch process. Different kinetic and isotherm models were examined and the model parameters were determined. The column studies were conducted to investigate the effects of flow rate, bed height, and initial metal ion concentration on removal efficiencies. The experimental data reflects reasonably with Thomas and Yoon–Nelson models in continuous mode.read more
Citations
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Biosorption of pollutants by plant leaves: An empirical review
TL;DR: The use of green adsorbents from tree leaves is a key research domain in this regard as discussed by the authors and the basic steps of preparation were found to be similar for most studies and it involves pre-cleaning, drying, grinding and sieving.
Journal ArticleDOI
Cr(VI) adsorption by a green adsorbent walnut shell: Adsorption studies, regeneration studies, scale-up design and economic feasibility
TL;DR: In this paper, a scale-up design for Cr(VI) removal using walnut shell as an adsorbent and its economic feasibility are done to find out its applicability in real life.
Journal ArticleDOI
A review on valorization of biomass in heavy metal removal from wastewater
TL;DR: In this article, a review of the progress made in the field of low-cost biosorption of heavy metal ions, over the past few years, has been presented, which gives a comprehensive summary of the synthesis, performance, modification and regeneration of biosorbents.
Journal ArticleDOI
Removal of various contaminants from water by renewable lignocellulose-derived biosorbents: a comprehensive and critical review
Hai Nguyen Tran,Hoang Chinh Nguyen,Seung Han Woo,Tien Vinh Nguyen,Saravanamuthu Vigneswaran,Ahmad Hosseini-Bandegharaei,Jörg Rinklebe,Ajit K. Sarmah,Andrei Ivanets,Guilherme Luiz Dotto,Tho Truong Bui,Ruey-Shin Juang,Huan-Ping Chao +12 more
TL;DR: In this article, the development and exploration of low-cost, promising adsorbents to remove contaminants in water bodies cause potential health risks for humans and great environmental threats, and therefore, the research and development of low cost, promising adorbents is needed.
Journal ArticleDOI
Biosorption of chromium (VI) from aqueous solutions and ANN modelling
TL;DR: The study explores the undiscovered potential of the natural waste materials for sustainable existence of small and medium sector industries, especially in the third world countries by protecting the environment by eco-innovation.
References
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The adsorption of gases on plane surfaces of glass, mica and platinum.
TL;DR: In this article, the absorption index at the wave length of the band maximum was found to be proportional to the total concentration of metal at shorter wave lengths, however, deviations were observed, the absorption increasing more rapidly with concentration than Beers' law would demand.
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Adsorption of basic dye on high-surface-area activated carbon prepared from coconut husk: equilibrium, kinetic and thermodynamic studies.
TL;DR: Coconut husk-based activated carbon was shown to be a promising adsorbent for removal of methylene blue from aqueous solutions and was found to follow closely the pseudo-second-order kinetic model.
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Application of gas adsorption kinetics. I. A theoretical model for respirator cartridge service life.
Young Hee Yoon,James H. Nelson +1 more
TL;DR: A new theoretical model addressing the adsorption and breakthrough of contaminant vapors or gases with respect to solid sorbents is developed, less complicated and easier to apply to practical industrial hygiene problems than theories developed previously.
Journal ArticleDOI
Selective adsorption of chromium(VI) in industrial wastewater using low-cost abundantly available adsorbents
TL;DR: In this article, the removal of poisonous Cr(VI) from industrial wastewater by different low-cost abundant adsorbents was investigated, including wool, olive cake, sawdust, pine needles, almond shells, cactus leaves and charcoal were used at different adsorbent/metal ion ratios.