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Removal of Cr(VI) and Cu(II) ions from aqueous solution by rice husk ash—column studies
Shreyashi Sarkar,Sudip Kumar Das +1 more
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In this paper, the technical feasibility of rice husk ash for adsorptive removal of Cr(VI) and Cu(II) is examined in packed bed from aqueous solutions.Abstract:
In this present study, the technical feasibility of rice husk ash for adsorptive removal of Cr(VI) and Cu(II) is examined in packed bed from aqueous solutions. The effects of different operating parameters such as height of the packed bed column (5–15 cm), flow rate of aqueous metal ion solution (10–30 ml min−1), and initial metal ion concentration (10–30 mg L−1) were studied. Capacity of the bed to absorb metal ions was found to increase with an increase in bed height, decrease in flow rate, and metal ion concentration. Adams–Bohart, Yoon–Nelson, and Thomas models were applied to the experimental data for the prediction of breakthrough point and also to determine the model parameters to characterize the column. The Yoon–Nelson model and Thomas model were applicable for Cr(VI) removal, and for Cu(II), Thomas model was suited.read more
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Investigations on the properties of geopolymer mortar and concrete with mineral admixtures: A review
TL;DR: In this paper, the effect of various mineral additives on the mechanical, durability and microstructure properties of concrete and geopolymer mixtures was summarized and the results advocate that mixtures with desired properties can be designed for ambient temperature curing condition with minerals additives which may further promote them as an environmentally friendly construction material.
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
Comparative study of adsorptive removal of Cr(VI) ion from aqueous solution in fixed bed column by peanut shell and almond shell using empirical models and ANN
TL;DR: These adsorbents have an excellent potential and are useful for water treatment particularly small- and medium-sized industries of third world countries, as breakthrough time and exhaustion time are longer in comparison to peanut shell.
Journal ArticleDOI
Cr(VI) removal from aqueous solution using green adsorbents in continuous bed column – statistical and GA-ANN hybrid modelling
TL;DR: In this article, a study was performed in fixed bed downflow columns at multiple flow rates, bed depths, and influent concentrations for Cr(VI) elimination using the above green adsorbents.
Journal ArticleDOI
A systematic review on adsorptive removal of hexavalent chromium from aqueous solutions: Recent advances
TL;DR: In this article , the performance and applicability of several adsorptive materials for hexavalent chromium (Cr(VI) removal from aqueous media are discussed, along with a detailed analysis of the mechanisms involved.
References
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Book
Standard methods for the examination of water and wastewater
TL;DR: The most widely read reference in the water industry, Water Industry Reference as discussed by the authors, is a comprehensive reference tool for water analysis methods that covers all aspects of USEPA-approved water analysis.
Journal ArticleDOI
Some aspects of the behavior of charcoal with respect to chlorine.1
G. S. Bohart,E. Q. Adams +1 more
Journal ArticleDOI
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.
Book
Toxicology: The basic science of poisons
Amdur,Lewis Casarett,John Doull +2 more
TL;DR: This is a weighty and heavily documented textbook which should prove of great value to experimental toxicologists but is probably not appropriate for medical readers who would be better served by consulting medical textbooks of pharmacology and biochemistry.
Journal ArticleDOI
Batch Cr(VI) removal by polyacrylamide-grafted sawdust : Kinetics and thermodynamics
C. Raji,T.S. Anirudhan +1 more
TL;DR: In this paper, the effect of diverse ions has been studied and it is found that there is very little effect on the adsorption of Cr(VI) on polymer-grafted sawdust.
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