@article{scholars6789,
            note = {cited By 4},
         journal = {Desalination and Water Treatment},
            year = {2016},
       publisher = {Taylor and Francis Inc.},
          number = {47},
          volume = {57},
           title = {Application of response surface methodology for the optimization of hexavalent chromium removal using a new low-cost adsorbent},
             doi = {10.1080/19443994.2015.1129506},
           pages = {22507--22518},
        keywords = {adsorption; chromium; desalination; equilibrium; kinetics; optimization; response analysis; thermodynamics; weed},
          author = {Ezechi, E. H. and Kutty, S. R. B. M. and Isa, M. H. and Liew, M. S.},
            issn = {19443994},
             url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84952663833&doi=10.1080\%2f19443994.2015.1129506&partnerID=40&md5=3a0792f40d74221bc998baf8875d2a54},
        abstract = {The adsorption capacity of a novel adsorbent (Ageratum conyzoide leaf powder) was investigated for Cr(VI) removal from aqueous solution. Experiments were designed with the Box{\^a}??Behnken model of the response surface methodology (RSM). Preliminary experiments were conducted to obtain the optimum range of process variables used for the Box{\^a}??Behnken model. Three independent variables (pH, initial concentration, and adsorbent mass) were examined. The results show that Cr(VI) removal was more favorable at pH 2. Increase in pH above 2 resulted in negative Cr(VI) removal. Cr(VI) removal increased when adsorbent mass was increased, but decreased with increase in initial concentration. Cr(VI) removal of 92 was obtained at pH 2 and adsorbent mass of 0.3{\^A} g. Experiments were successfully optimized by RSM. Kinetics study correlated with the pseudo-second-order kinetic model, whereas equilibrium study was best described by the Langmuir isotherm model with maximum adsorption capacity of 437{\^A} mg/g. Thermodynamic parameters indicate a spontaneous, exothermic, and physiosorption process. {\^A}{\copyright} 2015 Balaban Desalination Publications. All rights reserved.}
}