Department Of Environmental Science And Technology

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Author: search.filters.author.Garg, Vinod KumarSubject: search.filters.subject.response surface methodology

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    Optimization of Swiss blue dye removal by cotton boll activated carbon: response surface methodological approach
    (Taylor and Francis Ltd., 2021-03-08T00:00:00) Rani, Rekha; Tasmeem, Summaiya; Malik, Anju; Garg, Vinod Kumar; Singh, Lakhvinder; Dhull, Sanju Bala
    Cotton boll activated carbon (CBAC) was employed for Swiss blue (SB) decolorization from simulated wastewater. Adsorption data conformed better with Langmuir adsorption isotherm with highest adsorption capability of 52.631 mg�g?1. Swiss blue adsorption onto CBAC was thermodynamically spontaneous and can be ascribed to follow the pseudo second order (PSO) kinetic model. An experimental matrix based on Box�Behnken design (BBD) of response surface methodology (RSM) was used to design the batch experiments for investigating the adsorption of SB onto CBAC considering four operating factors, viz. initial pH (2�12), contact time (15�150 min), SB concentration (125�375 mg�L�1) and CBAC dose (0.2�1 g/100 mL). RSM-BBD worked successfully to model the process, optimize the factors, and predict SB removal. � 2021 Informa UK Limited, trading as Taylor & Francis Group.
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    Optimization of cadmium(II) removal from water using sunflower waste carbon�a statistical approach
    (Taylor and Francis Ltd., 2020-01-28T00:00:00) Jain, Monika; Garg, Vinod Kumar; Paliwal, Rashmi; Kadirvelu, Krishna; Chaudhry, Smita
    In this study, a statistical experimental strategy was used to optimize the Cd(II) adsorption by chemically treated stems of Helianthus annuus (sunflower). The maximum cadmium adsorption was found at 100 mg/L when a dose of 2000 mg/100 ml was applied at pH 6.0. The highest percentage removal obtained using the model was 100%. The F value (17.28), lack-of-fit value (0.09) and coefficient of determination (R 2 = 0.939) established the appropriateness of quadratic model. The results of confirmation experiment, i.e. 99.8% removal of Cd(II) by prepared adsorbent under optimized conditions agreed well with the model predictions. � 2020 Informa UK Limited, trading as Taylor & Francis Group.