1. M.Y.A. Razak, Compendium of Environment Statistics Malaysia 2020, Department of Statistics, Malaysia, 2020 (Retrieved on 23 December 2020). Available at: my/v1/index.php?r=column/cthemeByCat&cat=162&bul_ id=TjM1ZlFxb3VOakdmMnozVms5dUlKZz09&menu_ id=NWVEZGhEVlNMeitaMHNzK2htRU05dz09
  2. N.H. Adenan, Y.Y. Lim, A.S.Y. Ting, Discovering decolorization potential of triphenylmethane dyes by actinobacteria from soil, Water Air Soil Pollut., 231 (2020) 560 (1–13), doi: 10.1007/ s11270-020-04928-w.
  3. L. Ramakreshnan, A. Rajandra, N. Aghamohammadi, C.S. Fong, S. Nalatambi, A preliminary insight into the environmental awareness of community in the vicinity of batik manufacturing units in Kelantan, Malaysia, GeoJournal, 85 (2020) 1745–1753.
  4. S. Moosavi, C.W. Lai, S. Gan, G. Zamiri, O. Akbarzadeh Pivehzhani, M.R. Johan, Application of efficient magnetic particles and activated carbon for dye removal from wastewater, ACS Omega, 5 (2020) 20684–20697.
  5. M. Manogaran, B. Manogaran, A.R. Othman, B. Gunasekaran, M.Y. Abd Shukor, Decolourisation of Reactive Red 120 by a heavy metal-tolerant bacterium isolated from Juru River, Malaysia, Biorem. Sci. Technol. Res., 8 (2020) 23–26.
  6. F. Mcyotto, Q. Wei, D.K. Macharia, M. Huang, C. Shen, C.W.K. Chow, Effect of dye structure on color removal efficiency by coagulation, Chem. Eng. J., 405 (2021) 126674, doi: 10.1016/j. cej.2020.126674.
  7. M. Thanavel, P.O. Bankole, R. Selvam, S.P. Govindwar, S.K. Sadasivam, Synergistic effect of biological and advanced oxidation process treatment in the biodegradation of Remazol yellow RR dye, Sci. Rep., 10 (2020) 20234 (1–9), doi: 10.1038/ s41598-020-77376-5.
  8. S. Varjani, P. Rakholiya, H.Y. Ng, S. You, J.A. Teixeira, Microbial degradation of dyes: an overview, Bioresour. Technol., 314 (2020) 123728, doi: 10.1016/j.biortech.2020.123728.
  9. M.Y. Chong, Y.J. Tam, Bioremediation of dyes using coconut parts via adsorption: a review, SN Appl. Sci., 2 (2020) 187 (1–16), doi: 10.1007/s42452-020-1978-y.
  10. J.H. Franco, B.F. da Silva, E.F.G. Dias, A.A. de Castro, T.C. Ramalho, M.V.B. Zanoni, Influence of auxochrome group in disperse dyes bearing azo groups as chromophore center in the biotransformation and molecular docking prediction by reductase enzyme: implications and assessment for environmental toxicity of xenobiotics, Ecotoxicol. Environ. Saf., 160 (2018) 114–126.
  11. N. Saksono, D.A. Putri, D.R. Suminar, N. Saksono, D.A. Putri, D.R. Suminar, Degradation of Remazol Red in Batik Dye Waste Water by contact glow discharge electrolysis method using NaOH and NaCl electrolytes, Int. J. Sci. Res. Knowledge, 1823 (2017) 020004 (1–7), doi: 10.1063/1.4978077.
  12. M.S.H. Bhuiyan, M.Y. Miah, S.C. Paul, T.D. Aka, O. Saha, M.M. Rahaman, M.J.I. Sharif, O. Habiba, M. Ashaduzzaman, Green synthesis of iron oxide nanoparticle using Carica papaya leaf extract: application for photocatalytic degradation of remazol yellow RR dye and antibacterial activity, Heliyon, 6 (2020) e04603, doi: 10.1016/j.heliyon.2020.e04603.
  13. T. Robinson, G. McMullan, R. Marchant, P. Nigam, Remediation of dyes in textile effluent: a critical review on current treatment technologies with a proposed alternative, Bioresour. Technol., 77 (2001) 247–255.
  14. M.A. Kamaruddin, M.S. Yusoff, H.A. Aziz, C.O. Akinbile, Recent developments of textile waste water treatment by adsorption process: a review, Int. J. Sci. Res. Knowledge, 1 (2013) 60–73, doi: 10.12983/ijsrk-2013-p060-073.
  15. B.M. D’Antoni, F. Iracà, M. Romero, Current treatment technologies and practical approaches on textile wastewater dyes removal, Panta Rei Srl – Water Solutions, (2017) 1–10, doi: 10.13140/RG.2.2.11472.71689.
  16. M.T. Yagub, T.K. Sen, S. Afroze, H.M. Ang, Dye and its removal from aqueous solution by adsorption: a review, Adv. Colloid Interface Sci., 157 (2019) 248–252.
  17. M.S. Santhosh, G. Karthikeyan, R. Sasikumar, R. Hariharan, R. Mohanraj, Mechanical and morphological behaviour of rice husk/prosopis juliflora reinforced bio composites, Mater. Today: Proc., 27 (2020) 556–560.
  18. M. Akhtar, M.I. Bhanger, S. Iqbal, S.M. Hasany, Sorption potential of rice husk for the removal of 2,4-dichlorophenol from aqueous solutions: kinetic and thermodynamic investigations, J. Hazard Mater., 128 (2006) 44–52.
  19. M. Shaban, M.R. Abukhadra, A.S. Mohamed, M.G. Shahien, S.S. Ibrahim, Synthesis of mesoporous graphite functionalized by nitrogen for efficient removal of safranin dye utilizing rice husk ash; equilibrium studies and response surface optimization, J. Inorg. Organomet. Polym. Mater., 28 (2018) 279–294.
  20. E.C. Peres, N. Favarin, J. Slaviero, A.R.F. Almeida, M.P. Enders, E.I. Muller, G.L. Dotto, Bio-nanosilica obtained from rice husk using ultrasound and its potential for dye removal, Mater. Lett., 231 (2018) 72–75.
  21. A.M. Akbar Ali, R.K. Karthikeyan, M. Sentamil Selvan, K.R. Mithilesh, M. Priyadharshini, N. Maheswari, G. Janani Sree, V.C. Padmanaban, R.S. Singh, Removal of Reactive Orange 16 by adsorption onto activated carbon prepared from rice husk ash: statistical modelling and adsorption kinetics, Sep. Sci. Technol., 55 (2020) 26–34.
  22. M.P. da Rosa, A.V. Igansi, S.F. Lütke, T.R. Sant’Anna Cadaval Jr., A.C.R. do Santos, A.P. de Oliveira Lopes Inacio, L.A. de Almeida Pinto, P.H. Beck, A new approach to convert rice husk waste in a quick and efficient adsorbent to remove cationic dye from water, J. Environ. Chem. Eng., 7 (2019) 103504, doi: 10.1016/j.jece.2019.103504.
  23. Z. Jiang, D. Hu, Molecular mechanism of anionic dyes adsorption on cationized rice husk cellulose from agricultural wastes, J. Mol. Liq., 276 (2019) 105–114.
  24. E. Alver, A.Ü. Metin, F. Brouers, Methylene blue adsorption on magnetic alginate/rice husk bio-composite, Int. J. Biol. Macromol., 154 (2020) 104–113.
  25. S. Sohrabnezhad, S.D. Mooshangaie, In situ fabrication of n-type Ag/AgBr nanoparticles in MCM-41 with rice husk (RH/ MCM-41) composite for the removal of Eriochrome Black-T, Mater. Sci. Eng. B, 240 (2019) 16–22.
  26. T. Ahmad, K. Ahmad, M. Alam, Sustainable management of water treatment sludge through 3‘R’ concept, J. Cleaner Prod., 124 (2016) 1–13.
  27. Z. Meng, Z. Zhou, D. Zheng, L. Liu, J. Dong, Y. Yang, X. Li, T. Zhang, Optimizing dewaterability of drinking water treatment sludge by ultrasound treatment: correlations to sludge physicochemical properties, Ultrason. Sonochem., 45 (2018) 95–105.
  28. S. Hamzah, N.A. Ali, A.W. Mohammad, M.M. Ariffin, A. Ali, Design of chitosan/PSF self-assembly membrane to mitigate fouling and enhance performance in trypsin separation, J. Chem. Technol. Biotechnol., 87 (2012) 1157–1166.
  29. S.H. Tang, M.A.A. Zaini, Malachite green adsorption by potassium salts-activated carbons derived from textile sludge: equilibrium, kinetics and thermodynamics studies, Asia-Pac. J. Chem. Eng., 12 (2016) 159–172.
  30. J.M. Salman, B.H. Hameed, Adsorption of 2,4-dichlorophenoxyacetic acid and carbofuran pesticides onto granular activated carbon, Desalination, 256 (2010) 129–135.
  31. P.A.M. Mourao, P.J.M. Carrott, M.M.L. Ribeiro Carrott, Application of different equations to adsorption isotherms of phenolic compounds on activated carbons prepared from cork, Carbon, 44 (2006) 2422–2429.
  32. L. Anah, N. Astrini, Isotherm adsorption studies of Ni(II) ion removal from aqueous solutions by modified carboxymethyl cellulose hydrogel, IOP Conf. Ser.: Earth Environ. Sci, 160 (2018) 012017.
  33. E. Liu, G. Kashwani, L. Li, Transformation of industrial solid wastes into carbon-infused infrastructure materials, J. Cleaner Prod., 260 (2020) 120890, doi: 10.1016/j.jclepro.2020.120890.
  34. N.A.M. Bashar, Z.H. Zubir, A. Ayob, S. Alias, Water treatment sludge as an alternative liner for landfill site: FTIR and XRD analysis, AIP Conf. Proc., 1774 (2016) 030026, doi: 10.1063/1.4965082.
  35. N.H. Shalaby, E.M.M. Ewais, R.M. Elsaadany, A. Ahmed, Rice husk templated water treatment sludge as low-cost dye and metal adsorbent, Egypt. J. Pet., 26 (2017) 661–668.
  36. I. Tan, L. Lim, K. Lim, Removal of atrazine from aqueous solutions using HNO3 treated oil palm shell-based adsorbent, J. Civ. Eng. Sci. Technol., 4 (2013) 17–22.
  37. X. Xu, X. Cao, L. Zhao, Comparison of rice husk- and dairy manure-derived biochars for simultaneously removing heavy metals from aqueous solutions: role of mineral components in biochars, Chemosphere, 92 (2013) 955–961.
  38. J.N. Nsami, J.K. Mbadcam, The adsorption efficiency of chemically prepared activated carbon from cola nut shells by ZnCl2 on methylene blue, J. Chem., 2013 (2013) 469170 (1–7), doi: 10.1155/2013/469170.
  39. T.R. Waghmode, M.B. Kurade, A.N. Kabra, S.P. Govindwar, Degradation of Remazol Red dye by Galactomyces geotrichum MTCC 1360 leading to increased iron uptake in Sorghum vulgare and Phaseolus mungo from soil, Biotechnol. Bioprocess Eng., 17 (2012) 117–126.
  40. M.M. Ibrahim, Cr2O3/Al2O3 as adsorbent: physicochemical properties and adsorption behaviors towards removal of Congo red dye from water, J. Environ. Chem. Eng., 7 (2019) 102848, doi: 10.1016/j.jece.2018.102848.
  41. M.A.A. Zaini, Y. Amano, M. Machida, Adsorption of heavy metals onto activated carbons derived from polyacrylonitrile fiber, J. Hazard. Mater., 180 (2010) 552–560.
  42. M.S. Monteiro, R.F. de Farias, J.A.P. Chaves, S.A. Santana, H.A.S. Silva, C.W. Bezerra, Wood (Bagassa guianensis Aubl) and green coconut mesocarp (Cocos nucifera) residues as textile dye removers (Remazol Red and Remazol Brilliant Violet), J. Environ. Manage., 204 (2017) 23–30.
  43. V.S. Mane, I.D. Mall, V.C. Srivastava, Kinetic and equilibrium isotherm studies for the adsorptive removal of Brilliant Green dye from aqueous solution by rice husk ash, J. Environ. Manage., 84 (2007) 390–400.
  44. H.N. Bhatti, Y. Safa, S.M. Yakout, O.H. Shair, M. Iqbal, A. Nazir, Efficient removal of dyes using carboxymethyl cellulose/alginate/polyvinyl alcohol/rice husk composite: adsorption/desorption, kinetics and recycling studies, Int. J. Biol. Macromol., 150 (2020) 861–870.