Document Type : Research Paper


1 Sanitary and Environmental Branch, Civil Engineering Department, University of Technology, Baghdad,

2 Sanitary and Environmental Branch, Civil Engineering Department, University of Technology, Baghdad, Iraq.

3 Environment and Water Directorate, Ministry of Science and Technology, Baghdad.


Recently, the world has directed to find environmentally friendly and clean materials to be used to treat wastes difficult to treat in the traditional way such as dyes. The object of this study was to synthesize iron nanoparticles using black tea extracts in an environmentally sustainable method. Also, it was developed by supporting with bentonite, used to remove Eriochrome blue-black B dyes from synthesis wastewater of textile factory. From the results, it was noted that black tea leaf extract has reduced iron ions to iron nanoparticles at room temperature. Composite iron nanoparticles were characterized using Scanning Electron Microscope (SEM), and Atomic force microscopy (AFM) studies where the diameter of iron nanoparticles was less than 70 nm. This research shows that ferrous nanoparticles can be manufactured using black tea leaf extract as a reducing agent. It also shows better-supported nanoparticles than unsupported. The decolorization efficiency catalyzed BT-NZVI, B-BT-NZVI increased from (14%, 42%) to (48%, 68%) at 180 min of batch processes when the NZVI concentration was increased from 0.5 g/L to 2 g/L respectively.


[1] A. Pokharia, & S. S. Ahluwalia, “Biodecolorization and degradation of xenobiotic azo dye-Basic Red 46 by Staphylococcus epidermidis MTCC 1062,” Int. J. Res. Biosciences, 5, 2, 10-23, 2016.
[2] E. S. Önal, T. Yatkin, M. Ergüt, & A. Özer, “Green synthesis of iron nanoparticles by aqueous extract of eriobotrya japonica leaves as a heterogeneous fenton-like catalyst: degradation of basic red 46, 2017.
[3] S. Ding, Z. Li, & R. Wang, “Overview of dyeing wastewater treatment technology,” Water ResourProt, 26, 73-78, 2010.
[4] N. Rahman, Z. Abedin, Z., & M. A. Hossain, “Rapid degradation of azo dyes using nano-scale zero valent iron,” American Journal of Environmental Sciences, 10, 2, 157, 2014.
[5] F. M. D. Chequer, D.J. Dorta and D.P. de Oliveira, “Azo Dyes and their metabolites: does the discharge of the azo dye into water bodies represent human and ecological risks?,” In: Advances in Treating Textile Effluent, Hauser, P. (Ed.), ISBN-10: 978-953-307-704-8, pp: 27-48, 2011.
[6] M. T. Yagub, T. K. Sen, S. Afroze, & H. M. Ang, “Dye and its removal from aqueous solution by adsorption: a review,” Advances in Colloid and Interface Science, 209, 172-184, 2014.
[7] P. Prema, S. Thangapandian, M. Selvarani, S. Subharanjani, & C. Amutha, “Color removal efficiency of dyes using nanozerovalent iron treatment,” Toxicological & Environmental Chemistry, 93, 10, 1908-1917, 2011.
[8] K. B. Tan, M. Vakili, B. A. Horri, P. E. Poh, A. Z. Abdullah, & B. Salamatinia, “Adsorption of dyes by nanomaterials: recent developments and adsorption mechanisms,” Separation and Purification Technology, 150, 229-242, 2015.
[9] J. Galán, A. Rodríguez, J. M. Gómez, S. J. Allen, & G. M. Walker, “Reactive dye adsorption onto a novel mesoporous carbon,” Chemical Engineering Journal, 219, 62-68, 2013.
[10] Y. P. Sun, X.-Q. Li, J. Cao, W.-X. Zhang, H.P. Wang, “Characterization of zerovalent iron nanoparticles,” Adv. Colloid Interface Sci. 120, 47–56, 2006.
[11] X. Wang, J. Yang, & M. Zhu, “Effects of PMMA/anisole hybrid coatings on discoloration performance of nanozerovalent iron toward organic dyes,” Journal of the Taiwan Institute of Chemical Engineers, 45, 3, 937-946, 2014.
[12] A. Ghadimi, R. Saidur, and H. S. C. Metselaar, “A review of nanofluid stability properties and characterization in stationary conditions,” International Journal of Heat and Mass Transfer, 54, 17-18, 4051–4068, 2011.
[13] S. Wang, & H. Wu, “Environmental-benign utilisation of fly ash as low-cost adsorbents,” Journal of Hazardous Materials, 136, 3, 482-501, 2006.
[14] O. G. Apul, Q. Wang, Y. Zhou, & T. Karanfil, “Adsorption of aromatic organic contaminants by graphenenanosheets: Comparison with carbon nanotubes and activated carbon,” Water Research, 47, 4, 1648-1654, 2013.
[15] T. A. Kurniawan, & W. H. Lo, “Removal of refractory compounds from stabilized landfill leachate using an integrated H2O2 oxidation and granular activated carbon (GAC) adsorption treatment,” Water Research, 43, 16, 4079-4091, 2009.
[16] S. Agarwal, H. Sadegh, M. Monajjemi, A. S. Hamdy, G. A. Ali, A. O. Memar, & V. K. Gupta, “Efficient removal of toxic bromothymol blue and methylene blue from wastewater by polyvinyl alcohol,” Journal of Molecular Liquids, 218, 191-197, 2016.
[17] L. Wang, J. Li, Q. Jiang, & L. Zhao, “Water-soluble Fe3O4 nanoparticles with high solubility for removal of heavy-metal ions from waste water,” Dalton Transactions, 41, 15, 4544-4551, 2012.
[18] H. H. Abdel Ghafar, G. A. Ali, O. A. Fouad, & S. A. Makhlouf, “Enhancement of adsorption efficiency of methylene blue on Co3O4/SiO2 nanocomposite,” Desalination and Water Treatment, 53, 11, 2980-2989, 2015.
[19] L. Huang, F. Luo, Z. Chen, M. Megharaj, & R. Naidu, “Green synthesized conditions impacting on the reactivity of Fe NPs for the degradation of malachite green,” Spectrochim. Acta A, 137, 154-159, 2015