Chemistry & Chemical Engineering

Chemistry & Chemical Engineering

Application of response surface methodology for the removal of 4-nitroaniline in aqueous solution using activated carbon prepared from peanut shells and avocado seed

Pages: 16  ,  Volume: 9  ,  Issue: 1 , July   2018
Received: 02 Aug 2018  ,  Published: 07 August 2018
Views: 46  ,  Download: 38


# Author Name
1 Elangwe Collins Ngoe
2 Aurelien Bopda
3 Tchuifon Tchuifon Donald
4 Nche George Ndifor-Angwafor



In this study, response surface methodology (RSM)  was employed to optimize the adsorption of 4-nitroaniline (4-NA) from  aqueous solution onto activated carbons obtained from peanut shells (PNAC)  and avocado seed (ASAC). The samples were activated with 0.6 M KOH and were characterized using FTIR, XRD techniques. Different physical properties such as moisture content, pH, pHpzc and iodine number were also determined. Response surface methodology was used to study the interactive effect and to optimize the operational parameters on the adsorption capacity of 4-NA onto PNAC and ASAC. It was shown that a second order polynomial regression model properly interprets the experimental data with correlation coefficients of determination (R2) values of 97.17% and 95.68% for 4-NA adsorption on PNAC and ASAC respectively. Results also showed that the optimum conditions for the adsorption of 4-NA from aqueous solution onto PNAC and ASAC were as follows:  optimum initial 4-NA concentration of 50 mg/L, pH of 3 and contact time of 49.05 minutes onto PNAC and 65.5 minutes onto ASAC were obtained which resulted to an optimum adsorption capacity of 3.10 mg/g and 2.42 mg/g of 4-NA onto PNAC and ASAC respectively. The results obtained showed that peanut shell activated carbon exhibited a better performance than avocado seed activated carbon for the removal of 4-NA from aqueous media.

Key words:  Activated Carbon, Adsorption, Central Composite design,  4-NA, RSM



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  • References


    [1] Alemagi, D.; Oben, M. & Ertel, J. (2006). Mitigating industrial pollution along the     Atlantic coast of Cameroon: An overview of Government Effort. The     Environmentalist, 26(1),         41-50.

    [2] Gerald, B. (2005). Nitro Compounds, Aromatics in Ullmann's Encyclopedia of Industrial     Chemistry (7th Edition), Wiley, 2, 181-200.

    [3] Bhunia, F.; Saha, N. C.; Kaviraj, A. (2003). Effects of aniline-an aromatic amine to               freshwater organisms. Ecotoxicology, 12, 397-403.

    [4] Mackinson, F. W.; Sticott, R. S. & Partridge, L. (1981). Occupational Health Guidelines      for Chemical Hazards. DHHS publication, Washington, D. C, USA, 3, 81-123.

    [5] Oturan, M. A.; Peiroten, J.; Chartrin, P.; Acher, A. J. (2000). Complete destruction of

                p-nitrophenol in aqueous medium by Electro-Fenton method. Environmental Science      and Technology, 34, 3474-3479.

    [6] Mckay, G.; Prasad, G. R.; Mouli, P. R. (1998). The removal of dye colours from aqueous     solutions by adsorption on low-cost materials. Water, Air and Soil pollution, 114,         423–438.

    [7] Ferrero, F. (2007). Dye removal by low cost adsorbent: Hazelnut shells in comparison           with wood saw dust, Journal of Hazardous materials, 142: 144-152.

    [8] Dhiraj, S. M.; Garima, M. P. (2008). Agricultural Waste Material as Potential Adsorbent       for sequestering Heavy Metal Ions from Aqueous Solutions– A Review Saint         longowal Institute of Engineering and Technology, Department of Chemistry,        Longowal, India.


    [9] Narayana, S. K. V.; king, P.; Gopinadh, R., Sreelakshmi, V. (2011). Response surface          optimization of dye removal by using waste prawn shells. International journal of         chemical sciences and Applications, 2(3), 186-193.

    [10] Veronica, C. (1999). One factor-at-a-time versus designed experiments. Journal of American Statistician, 53(2), 126-131.

    [11] Myers, R. H.; Montgomery, D. C. & Anderson-Cook, C. M. (2016). Response Surface       Methodology: Process and product optimization using Designed experiment. John          Wiley, Hoboken, New Jersey, USA, 856p.

    [12] Kifuani, K. M.; Noki, V. P.; Ndelo, D. P.; Mukana, W. M.; Ekoko, B. G.; Ilinga, L. B. &   Mukinayi, J. (2012). Adosption de la quinine bichlorhydrate  sûr un charbon actif peu   couteux à base de la Bagasse de canne a sucre imprégnée de l’acide phosphorique. International Journal of Biological and Chemical Society, 6, 1337-1359.

    [13] Tchuifon, D. R.; Anagho, S. G.; Njanja, E.; Ghogomu, J. N.; Ndifor-Angwafor, N. G &     Kamgaing, T. (2014). Equilibrium and kenetic modelling of methyl orange adsorption    from   aqueous solution using rice husk and egussi peeling. International Journal of        Chemical Science, 12, 141-161.

    [14] Lopes-Ramon, M. V.; Stoeckli, F.; Moreno-Castilla, C. & Carrasco-Marin, F. (1999). On    the characterization of acidic and basic surface sites on carbons by various techniques.            Carbon, 37, 1215-1221.

    [15] Annadurai, G.; Babu, S. R.; Nagarajan, G. & Ragu, K. (2000). Use of Box-Behnken           design             of experiments in the production of manganese peroxidase by Phancrochate             chrysosporium (MTCC 767) and decolorization of crystal violet. Bioprocess Engineering, 23, 715-719.    

    [16] Ravikumar, K.; Krishnan, S.; Ramalingam, S.; Balu, K. (2007).  Optimization of process     variables by the application of response surface methodology for dye removal using          novel adsorbent. Dyes and Pigments, 72, 66-74.

    [17] Montgomery, D. C. (2017). Design and Analysis of Experiments (9th Edition), Wiley,          New York, USA, 630p.

    [18] Ndi, N. J. ; Ketcha, M. J. ; Anagho, G. S.; Ghogomu, N. J. & Belibi, E. P. (2014).   Physical and chemical characteristics of activated carbon prepared by pyrolysis of            chemically treated Cola nut (cola acuminate) Shells wastes and its ability to adsorbed       organics. International journal of Advanced Chemical Technology, 3, 1-13.

    [19] Suarez-Garcia, F.; Martinez-Alonso, A.; Tascón, J. M. D. (2002). Pyrolysis of apple            pulp: effect of operation conditions and chemical additives. Journal of Energy and         Environmental Engineering, 3(32), 2251-6832.

    [20] Yagmur, E.; Ozmak, M. & Aktas, Z. (2008). A novel method for production of activated   carbon from waste tea by chemical activation with microwave energy. Fuel, 87, 3278-           3285.

    [21] Omri, A. & Benzina, M. (2012). Characterization of activated carbon prepared from a        new raw lignocellulosic material: ziziphus spina-christi seeds. Tunisia Journal of     Chemical society, 14, 175-183.

    [22] Kumar, A. (2013). Adsorptive removal of Rhodamine B (dye) using low cost adsorbents.   Master Thesis. National Institute of Technology, Rourkela, India.

    [23] Hui, T. S. & Zaini, M. A. A. (2015). Potassium hydroxide activation of activated carbon:   a commentary. Carbon Letters, 16(4), 275-280.

    [24] Lillo-Ródenas, M. A.; Cazorla-Amorós, D. & Linares-Solano, A. (2003). Understanding    chemical reactions between carbons and NaOH and KOH: an insight into the chemical         activation mechanism. Carbon, 41, 267.

    [25] Rhoda, H. G. & Ideyonbe, O. (2015). Production of activated carbon and    characterization from Snail Shell Waste (Helix pomatia). Advances in Chemical         Engineering and Science, 5, 51-61.

    [26] Khuri, A. I. (2017).  Response surface methodology and its applications in agricultural       and food sciences.  Biomedical Biostatistics International Journal 5(5), 103-119.

    [27] Sadri, M. S.; Alavi, M. R. & Arami, M. (2010). Coagulation / flocculation process for         dye removal using sludge from water treatment plant: Optimization through response            surface methodology. Journal of Hazardous Materials, 175, 651–657.

    [28] Azeez, O. & Adekola, A. (2016). Sorption of 4-NA on activated kaolinitic clay and            Jatropha  activated carbon in aqueous solution. Jordarn journal of chemistry, 11(2),    128- 145.