Kunta Ravindhranath

Bio: Kunta Ravindhranath is an academic researcher from K L University. The author has contributed to research in topics: Adsorption & Extraction (chemistry). The author has an hindex of 6, co-authored 62 publications receiving 165 citations. Previous affiliations of Kunta Ravindhranath include University of Madras & Bapatla Engineering College.

Novel adsorbents possessing cumulative sorption nature evoked from Al2O3 nanoflakes, C.urens seeds active carbon and calcium alginate beads for defluoridation studies

Abstract: Nano Al2O3 flakes are synthesized and loaded on H3PO4 activated carbon prepared from the seeds of C.urens and thus obtained composite is immobilized in Ca-alginate beads with an aim to derive combined advantage of sorption nature of active carbon and nanoflakes of Al2O3. The adsorbents are characterized and their de-fluoridation abilities are 4.1 mg/g for active carbon, 5.62 mg/g for nano Al2O3-active carbon composite and 9.09 mg/g for the beads. The adsorption nature, kinetics of adsorption and thermodynamic parameters are analyzed. The spent adsorbents can be regenerated. The methodologies are successfully applied to real water samples.

Sequential synergetic sorption analysis of Gracilaria Rhodophyta biochar toward aluminum and fluoride: A statistical optimization approach.

Abstract: The present work proposes the synthesis of robust biochar from Gracilaria Rhodophyta red weeds for sequential removal of Al(III) and fluoride from wastewater. The sorption experiments have been modeled by preliminary optimization of operational parameters using 24 factorial statistical modeling. The model has estimated an optimum sequential synergetic removal of 44.5 mg/g of Al(III) and 2.1 mg/g of fluoride onto the biochar. FESEM, BET, XRD, EDX, and FTIR established the potentiality of biochar toward synergetic sorption of Al(III) and fluoride. The thermodynamic analysis projected that the adsorption is physisorption in nature. The adsorption of Al(III) and fluoride follows the Langmuir and Freundlich isotherm models, respectively, and the kinetic analysis established the pseudo-second-order deposition of Al(III) and fluoride ions. The synthesized adsorbent is regenerative enough and could achieve synergetic removal of Al(III) and fluoride ions from industrial- and groundwater-contaminated water bodies. PRACTITIONER POINTS: Biochar from seaweeds is explored in the sequential removal of Al(III) and F- ions. Statistical model is developed for % adsorption and tested for reliability by ANOVA. GRBC sorbed 44.5 and 2.1 mg/g of Al(III) and F- ions, respectively, at optimum levels. FESEM, EDX, XRD, and FTIR characterization confirm the potentiality of the GRBC. GRBC sorbed ⁓90% of Al(III) and F- ions from wastewater and is regenerative.

Zirconium-alginate beads doped with H2SO4-activated carbon derived from leaves of Magnoliaceae plant as an effective adsorbent for the removal of chromate

Abstract: H2SO4-activated carbon generated from the leaves of Magnoliaceae plant-(SACM) is doped in zirconium alginate beads-(SACM@Zr). The active carbon and beads are identified to have affinity for toxic chromate ions and hence studied as adsorbents for chromium remediation of water. The sorbents are characterized using conventional methods including FTIR, FESEM and EDX techniques. The sorption nature is investigated and optimized with respect to initial chromium concentration, adsorbent dosage, contact time, pH and temperature. The adsorption capacities are 28.82 mg/g for active carbon and 37.74 mg/g for beads. Thermodynamic parameters are analyzed. Negative values of ΔG∘ and positive values of ΔH∘ and ΔS° indicate that the chromium adsorption ‘onto’ the adsorbents is spontaneous, endothermic and more disorder prevails at solution/solid interface. Langmuir adsorption isotherms and pseudo second-order kinetics are best models for explaining adsorption process. The adsorbents are successfully applied to treat chromium polluted effluents from Ethiopia Tannery Companies and polluted waters of Leyole and Worka rivers around Kombolcha, located in the north-central part of Ethiopia.

Environmental engineering-i

Abstract: From the NJIT Department of Civil and Environmental Engineering, the Graduate Certificate in Environmental Engineering allows students to focus in Water Quality, Treatment and Infrastructure, Integrated Site Remediation, or Multidisciplinary Environmental Engineering. Environmental Engineers are interested in ways to protect the environment, improve water quality, and are essential in planning, designing and constructing water and wastewater treatment plants, solid waste disposal systems, site remediation approaches and emission control measures.