Author
P. Rath
Bio: P. Rath is an academic researcher from National Institute of Technology, Rourkela. The author has contributed to research in topics: Adsorption & Chitosan. The author has an hindex of 9, co-authored 12 publications receiving 956 citations.
Topics: Adsorption, Chitosan, Chitin, Freundlich equation, Shrimp
Papers
More filters
TL;DR: In this article, the adsorption of hexavalent chromium were conducted by varying various parameters such as contact time, pH, amount of adsorbent, concentration of adsorate and temperature.
362 citations
TL;DR: Prepared chitosan was characterized by Fourier transforms infrared spectroscopy, X-ray powder diffraction, Scanning electron microscope and Thermogravimetric analysis and TGA results demonstrated the lower thermal stability of chitOSan.
196 citations
TL;DR: In this paper, the obtained chitin and chitosan have been characterized by using different techniques like spectral analysis, X-ray diffraction, elemental analysis, Fourier transforms infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and Differential scanning calorimetry (DSC).
Abstract: After cellulose, chitin is the most widespread biopolymer available in nature. Chitin has economic value because of its biological activities, industrial and biomedical applications. There are three sources of chitin, namely crustaceans, insects and microorganism. The commercial sources of chitin are shells of crustaceans such as shrimp, crabs, lobsters and krill. In the present study, chitin has been extracted from locally available fish in Rourkela. The obtained chitin was converted into the more useful chitosan. The obtained chitin and chitosan have been characterized by using different techniques like spectral analysis, X-ray diffraction, Elemental analysis, Fourier transforms infrared spectroscopy (FTIR), Scanning electron microscopy (SEM) and Differential scanning calorimetry (DSC). XRD analysis indicated the crystalline nature of the chitin and chitosan. The FTIR patterns displayed the bands corresponding to stretching and vibration of O-H, N-H and CO bonds and conformed the formation of α -chitin. Degree of deacetylation (DD) value was calculated using elemental analysis, potentiometric titration and FTIR. Using FTIR analysis DD value was found to be 61%.
176 citations
TL;DR: In this article, a study was undertaken to extract chitin and chitosan by chemical method, and several treatments with acid and alkali were taken into consideration to determine effective concentration for yielding optimum output.
157 citations
TL;DR: In this paper, the efficiency of treated bauxite to remove Cr(VI) from a synthetic solution was investigated and it was shown that the adsorption is highest at 45°C and the rate is very slow after 5min.
95 citations
Cited by
More filters
TL;DR: In this review, an extensive list of plant wastes as adsorbents including rice husks, spent grain, sawdust, sugarcane bagasse, fruit wastes, weeds and others has been compiled and some of the treated adsorbent show good adsorption capacities.
1,663 citations
TL;DR: Distinctive adsorption equilibria and kinetic models are of extensive use in explaining the biosorption of heavy metals, denoting the need to highlight and summarize their essential issues, which is the main purpose of this paper.
1,471 citations
TL;DR: This study is a review of the recent literature on the use of natural and modified lignocellulosic residues for Cr adsorption and finds that many by-products of agriculture have proved to be suitable low cost adsorbents for Cr(VI) and Cr(III) removal from water.
782 citations
TL;DR: A survey of removal techniques for Cr(VI)-contaminated aqueous solutions is given in this article, with a particular focus on adsorption, membrane filtration, ion exchange, and electrochemical treatment methods.
Abstract: Cr(VI) is a well-known highly toxic metal, considered a priority pollutant. Industrial sources of Cr(VI) include leather tanning, cooling tower blowdown, plating, electroplating, anodizing baths, rinse waters, etc. This article includes a survey of removal techniques for Cr(VI)-contaminated aqueous solutions. A particular focus is given to adsorption, membrane filtration, ion exchange, and electrochemical treatment methods. The primary objective of this article is to provide recent information about the most widely used techniques for Cr(VI) removal.
773 citations
TL;DR: A review of a certain class of theoretical models describing the kinetics of pollutants sorption onto various sorbents assuming the rate of surface reaction as the rate-limiting step are considered.
711 citations