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Articles
  • OpenAccess
  • Neem (Azadirachta indica) Leaves for Removal of Organic Pollutants  [EPPH 2015]
  • DOI: 10.4236/gep.2015.32001   PP.1 - 9
  • Author(s)
  • Muhammad B. Ibrahim, Sadiq Sani
  • ABSTRACT
  • Neem (Azadirachta indica) leaves was employed in a batch adsorption technique for the detoxification of congo red (CR) and methyl orange (MO) dyes from a single component model wastewater. The adsorption efficiency of the leave was judged based on changes of parameters like agitation time, adsorbent dosage, adsorbent particle size, and adsorbate initial concentration and pH. Adsorbate concentration during the adsorption process was monitored using T60-U UV-Visible spectrometer from TG Instruments. While FTIR and SEM were employed to study the surface functional group and morphological changes of the adsorbent before and after the adsorption process. Percent adsorption increased with increase in agitation time (5 - 240 minutes), adsorbent dosage (0.1 - 0.5 g), initial concentration (100 - 300mg/L), and with decrease in particle size (≥75 μm to ≤300 μm) of adsorbent. The adsorption processes were found to be pH-dependent, increasing or decreasing in acidic (pH 2 - 6) or alkaline (pH 8 - 12) range over the studied pH (2 - 12) range. The correlation coefficient (R2 – values) ranging from 0.9359 - 0.9998 shows good agreement of the experimental data for all the tested isotherms. The monolayer maximum adsorption capacity for Langmuir’s qm (18.62 - 24.75mg/g) and Dubinin-Radushkevich, qD (20.72 - 26.06mg/g) are comparable. Both Langmuir’s separation factor (RL) and Freundlich constant (nF) suggests unfavourable adsorption of the dyes onto the adsorbent. The mean free energy of adsorption, ?? (79.06 - 316.23 J/mol) calculated from Dubinin-Radushkevich equation suggest a physical adsorption. Restricted range of values for heat of adsorption, bT (?946.9 to 737.4 J/mol), was obtained from Temkin equation. Reduction in band intensities and vibrational changes observed in FTIR spectra indicate possible involvement of carbonyl (-C=O), carboxyl (-COOH), hydroxyl alcoholic (-OH) and amino (-NH2) functional groups on the adsorbents’ surfaces during the adsorption and interaction with the sulfonic acid groups (-SO3H) on the adsorbate molecules. The difference in irregular and porous texture surface morphology of fresh and dye-loaded adsorbents characterized the adsorption of the dyes by neem leaves. The study shows that neem leaves are potential alternative low-cost adsorbents for the effective removal of Congo red (CR) and Methyl orange (MO) from wastewater.

  • KEYWORDS
  • Batch Adsorption, Congo Red, Dye, Isotherms, Neem Leaves, Methyl Orange, Wastewater
  • References
  • [1]
    Rijsberman, F.R. (2006) Water Scarcity: Fact or Fiction. Agricultural Water Management, 80, 5-22.
    http://dx.doi.org/10.1016/j.agwat.2005.07.001
    [2]
    Ahuja, S. (2009) Handbook of Water Purity and Quality. IWA Publishing, Great Britain.
    [3]
    Al-Asheh, S., Banat, F. and Abu-Aita, L. (2003) Adsorption of Phenol Using Different Types of Activated Bentonites. Separation and Purification Techniques, 33, 1-10.
    http://dx.doi.org/10.1016/S1383-5866(02)00180-6
    [4]
    Santos, S.C.R. and Boaventura, R.A.R. (2008) Adsorption Modelling of Textile Dyes by Sepiolite. Applied Clay Science, 42, 137-145.
    http://dx.doi.org/10.1016/j.clay.2008.01.002
    [5]
    Zohra, B., Aicha, K., Fatima, S., Nourredin, B. and Zoubir, D. (2008) Adsorption of Direct Red 2 on Bentonite Modified by Cetyltrimethylammonium Bromide. Chemical Engineering Journal, 136, 295-305.
    http://dx.doi.org/10.1016/j.cej.2007.03.086
    [6]
    Gómez, V., Larrechi, M.S. and Callao, M.P. (2007) Kinetic and Adsorption Study of Acid Dye Removal Using Activated Carbon. Chemosphere, 69, 1151-1158.
    http://dx.doi.org/10.1016/j.chemosphere.2007.03.076
    [7]
    Gupta, V.K., Kumar, R., Nayak, A., Saleh, T.A. and Barakat, M.A. (2013) Adsorptive Removal of Dyes from Aqueous Solution onto Carbon Nanotubes: A Review. Advances in Colloid and Interface Science, 193–194, 24-34.
    http://dx.doi.org/10.1016/j.cis.2013.03.003
    [8]
    Acemioglu, B. (2004) Adsorption of Congo Red from Aqueous Solu-tion onto Calcium-Rich Fly Ash. Journal of Colloid and Interface Science, 274, 371-379.
    http://dx.doi.org/10.1016/j.jcis.2004.03.019
    [9]
    Purkait, M.K., Maiti, A., Das Gupta, S. and De, S. (2007) Removal of Congo Red Using Activated Carbon and Its Regeneration. Journal of Hazardous Materials, 145, 289-295.
    http://dx.doi.org/10.1016/j.jhazmat.2006.11.021
    [10]
    Song, Y.L., Li, J.T. and Chen H. (2009) Degradation of C.I. Acid Red 88 Aqueous Solution by Combination of Fenton’s Reagent and Ultrasound Irradiation. Journal of Chemical Technology and Biotechnology, 84, 578-583.
    http://dx.doi.org/10.1002/jctb.2083
    [11]
    Liu, C., Ngo, H.H., Guo, W. and Tung, K. (2012) Optimal Conditions for Preparation of Banana Peels, Sugarcane Bagasse and Watermelon Rind in Removing Copper from Water. Bioresource Technology, 119, 349-354.
    http://dx.doi.org/10.1016/j.biortech.2012.06.004
    [12]
    Yadla, S.V., Sridevi, V. and Lakshmi, M.V.V.C. (2012) A Review on Adsorption of Heavy Metals from Aqueous Solution. Journal of Chemical, Biological and Physical Sciences, 2, 1585-1593.
    [13]
    G?nen, F. and Serin, D.S. (2012) Adsorption Study on Orange Peel: Removal of Ni (II) Ions from Aqueous Solution. African Journal of Biotechnology, 11, 1250-1258.
    [14]
    Sharma, N., Tiwari, D.P. and Singh, S.K. (2012) Decolourization of Synthetic Dyes by Agricultural Waste—A Review. International Journal of Scientific & Engineering Research, 3, 1-10.
    http://dx.doi.org/10.15373/22778179/MARCH2014/139
    [15]
    Haddadian, Z., Shavandi, M.A., Abidin, Z.Z., Fak-hru’l-Razi, A. and Ismail, M.H.S. (2013) Removal of Methyl Orange from Aqueous Solutions Using Dragon Fruit (Hylacereusundatus) Foliage. Chemical Science Transactions, 2, 900- 910.
    [16]
    Suyamboo, B.K. and Perumal R.S. (2012) Equilibrium, Thermodynamic and Kinetic Studies on Adsorption of a Basic Dye by Citrullus lanatus Rind. Iranica Journal of Energy & Environment, 3, 23-34.
    http://dx.doi.org/10.5829/idosi.ijee.2012.03.01.0130
    [17]
    Gopalakrishnan, K., Manivannan, V. and Jeyadoss, T. (2010) Comparative Study of Zn(II), Cu(II) and Cr(VI) from Textile Dye Effluent Using Sawdust and Neem Leaves Powder. E-Journal of Chemistry, 7, S504-S510.
    http://dx.doi.org/10.1155/2010/506424
    [18]
    Lian, L., Guo, L. and Guo, C. (2009) Adsorption of Congo Red from Aqueous Solution on Cabentonite. Journal of Hazardous Materials, 161, 126-131.
    http://dx.doi.org/10.1016/j.jhazmat.2008.03.063
    [19]
    Patil, S., Renukdas, S. and Patel, N. (2011) Removal of Methylene Blue from Aqueous Solutions by Adsorption Using Teak Tree (Tectona grandis) Bark Powder. International Journal of Environmental Sciences, 1, 711-725.
    [20]
    Abdullah, N.M., Othaman, R., Abdullah, I., Jon, N. and Baharum, A. (2012) Studies on the Adsorption of Phenol Red Dye Using Silica-Filled enr/pvc Beads. Journal of Emerging Trends in Engineering and Applied Sciences, 3, 845-850.
    [21]
    Liu, J. and Wang, X. (2013) Novel Silica-Based Hybrid Adsorbents: Lead(II) Adsorption Isotherms. The Scientific World Journal, 2013, Article ID: 897159.
    http://dx.doi.org/10.1155/2013/897159
    [22]
    Bhattacharyya, K.G. and Sharma, A. (2004) Azadirachta indica Leaf Powder as an Effective Biosorbent for Dyes: A Case Study with Aqueous Congo Red Solutions. Journal of Environmental Management, 71, 217-229.
    http://dx.doi.org/10.1016/j.jenvman.2004.03.002
    [23]
    Asiagwu, A.K., Omuku, P.E. and Alisa, C.O. (2012-2013) Ki-netic Model for Removal of Methyl Orange (Dye) from Aqueous Solution Using Avocado Pear (Persea americana) Seed. Journal of Chemical, Biological and Physical Sciences, 3, 48-57.
    [24]
    Shah, B.A., Shah, A.V. and Shah, P.M. (2011) Sorption Isotherms and Column Separation of Cu(II) and Zn(II) Using Ortho Substituted Benzoic Acid Chelating Resins. Archives of Applied Science Research, 3, 327-341.
    [25]
    Samarghandi, M.R., Hadi, M., Moayedi, S. and Askari, F.B. (2009) Two-Parameter Isotherms of Methyl Orange Sorption by Pinecone Derived Activated Carbon. Iranica Journal of Environmental Health, Science and Engineering, 6, 285-294.
    [26]
    Meroufel, B., Benali, O., Benyahia, M., Benmoussa, Y. and Zenasni, M.A. (2013) Adsorptive Removal of Anionic Dye from Aqueous Solutions by Algerian Kaolin: Characteristics, Isotherm, Kinetic and Thermodynamic Studies. Journal of Material and Environmental Science, 4, 482-491.
    [27]
    Mumin, M.A., Khan, M.M.R., Akhter, K.F. and Uddin, M.J. (2007) Potentially of Open Burnt Clay as an Adsorbent for the Removal of Congo Red from Aqueous Solution. International Journal of Environmental Science and Technology, 4, 525-532.
    http://dx.doi.org/10.1007/BF03325990
    [28]
    Jayaraj, R., Thanaraj, P.J., Natarajan, S.T. and Prasath, P.M.D. (2011) Removal of Congo Red Dye from Aqueous Solution Using Acid Activated Eco-Friendly Low Cost Carbon Prepared from Marine Algae Valoria bryopsis. Journal of Chemical and Pharmaceutical Research, 3, 389-396.
    [29]
    Khan, T.A., Dahiya, S. and Imran Ali, I. (2012) Removal of Direct Red 81 Dye from Aqueous Solution by Native and Citric Acid Modified Bamboo Sawdust-Kinetic Study and Equilibrium Isotherm Analyses. Gazi University Journal of Science, 25, 59-87.
    [30]
    Giwa, A.A., Bello, I.A. and Olajire, A.A. (2013) Removal of Basic Dye from Aqueous Solution by Adsorption on Melon Husk in Binary and Ternary Systems. Chemical and Process Engineering Research, 13, 51-68.
    [31]
    Bharathi, K.S. and Ramesh, S.P.T. (2013) Fixed-Bed Column Studies on Biosorption of Crystal Violet from Aqueous Solution by Citrullus lanatus (Watermelon) Rind and Cyperus rotundus. Applied Water Science, 3, 673-687.
    http://dx.doi.org/10.1007/s13201-013-0103-4

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