DSpace Collection: Journal of Environmental ManagementJournal of Environmental Managementhttp://localhost:8080/xmlui/handle/123456789/22312026-06-23T06:32:38Z2026-06-23T06:32:38ZEfficient removal of Acid Green 25 dye from wastewater using activated Prunus Dulcis as biosorbent: Batch and column studiesJain, Suyog N.. Gogate, Parag Rhttp://localhost:8080/xmlui/handle/123456789/22322019-08-06T07:49:15Z2018-01-04T00:00:00ZTitle: Efficient removal of Acid Green 25 dye from wastewater using activated Prunus Dulcis as biosorbent: Batch and column studies
Authors: Jain, Suyog N.; . Gogate, Parag R
Abstract: Biosorbent synthesized from dead leaves of Prunus Dulcis with chemical activation during the synthesis
was applied for the removal of Acid Green 25 dye from wastewater. The obtained biosorbent was
characterized using Brunauer-Emmett-Teller analysis, Fourier transform-infrared spectroscopy and
scanning electron microscopy measurements. It was demonstrated that alkali treatment during the
synthesis significantly increased surface area of biosorbent from 67.205 to 426.346 m2/g. The effect of
various operating parameters on dye removal was investigated in batch operation and optimum values of
parameters were established as pH of 2, 14 g/L as the dose of natural biosorbent and 6 g/L as the dose of
alkali treated biosorbent. Relative error values were determined to check fitting of obtained data to the
different kinetic and isotherm models. It was established that pseudo-second order kinetic model and
Langmuir isotherm fitted suitably to the obtained batch experimental data. Maximum biosorption capacity
values were estimated as 22.68 and 50.79 mg/g for natural biosorbent and for alkali activated
Prunus Dulcis, respectively. Adsorption was observed as endothermic and activation energy of 6.22 kJ/mol
confirmed physical type of adsorption. Column experiments were also conducted to probe the effectiveness
of biosorbent for practical applications in continuous operation. Breakthrough parameters were
established by studying the effect of biosorbent height, flow rate of dye solution and initial dye concentration
on the extent of dye removal. The maximum biosorption capacity under optimized conditions
in the column operation was estimated as 28.57 mg/g. Thomas and Yoon-Nelson models were found to
be suitably fitted to obtained column data. Reusability study carried out in batch and continuous column
operations confirmed that synthesized biosorbent can be used repeatedly for dye removal from
wastewater.2018-01-04T00:00:00Z