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Toxic chrome removal from industrial effluents using marine algae: Modeling and optimization
A. Nagababu,D. Srinivasa Reddy,G.V. Krishna Mohan 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.114 No.-
Chromium is a toxic heavy metal with a high recalcitrant and carcinogenic nature even at very low concentrations. In the current investigation, systems thinking analysis is adopted to understand the deleteriouseffects of chromium on the environment. Hazardous chromate ions are effectively been remediatedfrom industrial discharges by employing the robust adsorbent prepared from marine algae, GracilariaRhodophyta Biochar. The combined effect of physicochemical factors such as contact time, pH, biochardosage and initial chromate concentration on adsorption performance is analyzed by adopting the statisticalResponse Surface Methodology. At the optimum operating conditions of pH: 2–4; GRB dosage:0.3 g/100 mL; contact time: 90 min; initial chromate concentration: 60 mg/L and temperature:30 C ± 2, an amount of 19.6 mg/g of chromate ions are removed by the developed adsorbent. The characterizationresults showcased the efficiency of biochar towards the adsorption of chromate ions fromwastewater. The adsorption phenomenon follows the Langmuir isotherm model and pseudo-secondorderrate kinetics. The investigation of selectivity reveals that the developed adsorbent has a good selectivityfor Cr(VI) even with the presence of competing ions in the same medium. The developed robusttechnology can be successfully applied for the adsorption of toxic chromate ions from contaminatedindustrial samples.
Some fixed point theorems for modified JS-G-contractions and an application to integral equations
V. Srinivas Chary,G. Sudhaamsh Mohan Reddy,Huseyin Isik,Hassen Aydi,D. Srinivasa Chary,Stojan Radenovic 한국전산응용수학회 2020 Journal of applied mathematics & informatics Vol.38 No.5
In this article, we establish some fixed point results in G-metric spaces using the modified JS-G-contractions and we provide some suitable examples to support the results. Also, we give an application to solve an integral equation.