References
    -  M.N. Chileshe, S. Syampungani, E.S. Festin, M. Tigabu,
    A. Daneshvar, P.C. Odén, Physico-chemical characteristics and
    heavy metal concentrations of copper mine wastes in Zambia:
    implications for pollution risk and restoration, J. For. Res.,
    31 (2020) 1283–1293. 
-  T.E. Aniyikaiye, T. Oluseyi, J.O. Odiyo, J.N. Edokpayi, Physicochemical
    analysis of wastewater discharge from selected
    paint industries in Lagos, Nigeria, Int. J. Environ. Res. Public
    Health, 16 (2019) 1235, doi:10.3390/ijerph16071235. 
-  G.K. Weldegebrieal, Synthesis method, antibacterial and
    photocatalytic activity of ZnO nanoparticles for azo dyes
    in wastewater treatment: a review, Inorg. Chem. Commun.,
    120 (2020) 108140, doi:10.1016/j.inoche.2020.108140. 
-  K.M. Namwanja, S.M. Siachoono, A.M. Yambayamba,
    L. Chama, The impact of mine effluents on the water quality
    and macrophyte plant communities in the Kifubwa Stream,
    Solwezi, Zambia, Nat. Resour., 9 (2018) 198–211. 
-  E. Ngumba, A. Gachanja, J. Nyirenda, J. Maldonado,
    T. Tuhkanen, Occurrence of antibiotics and antiretroviral
    drugs in source-separated urine, groundwater, surface water
    and wastewater in the peri-urban area of Chunga in Lusaka,
    Zambia, Water SA, 46 (2020) 278–284. 
-  E. Lema, R. Machunda, K.N. Njau, Agrochemicals use in
    horticulture industry in Tanzania and their potential impact to
    water resources, Int. J. Biol. Chem. Sci., 8 (2014) 831–842. 
-  Y. Ikenaka, S.M. Nakayama, K. Muzandu, K. Choongo,
    H. Teraoka, N. Mizuno, M. Ishizuka, Heavy metal contamination
    of soil and sediment in Zambia, Afr. J. Environ. Sci. Technol.,
    4 (2010) 729–739. 
-  G.N. Ngweme, E.K. Atibu, D.M.M. Al Salah, P.M. Muanamoki,
    G.M. Kiyombo, C.K. Mulaji, J.-P. Otamonga, J.W. Poté, Heavy
    metal concentration in irrigation water, soil and dietary risk
    assessment of Amaranthus viridis grown in peri-urban areas in
    Kinshasa, Democratic Republic of the Congo, Watershed Ecol.
    Environ., 2 (2020) 16–24. 
-  G.A. Engwa, P.U. Ferdinand, F.N. Nwalo, M.N. Unachukwu,
    Mechanism and Health Effects of Heavy Metal Toxicity in
    Humans, O. Karcioglu, B. Arslan, Eds., Poisoning in the
    Modern World-New Tricks for an Old Dog?, IntechOpen, 2019,
    pp. 1–23. 
-  P.B. Tchounwou, C.G. Yedjou, A.K. Patlolla, D.J. Sutton,
    Heavy metals toxicity and the environment, EXS, 101 (2012)
    133–164. 
-  WHO, Guidelines for Drinking-Water Quality, WHO Chronicle,
    38 (2011) 104–108. 
-  E.A. Clarke, R. Anliker, Organic Dyes and Pigments, In:
    Anthropogenic Compounds, The Handbook of Environmental
    Chemistry, Vol. 3/3A, Springer, Berlin, Heidelberg, 1980,
    pp. 181–215. 
-  Q. Feng, H. Cheng, F. Chen, X. Zhou, P. Wang, Y. Xie,
    Investigation of cationic dye adsorption from water onto acetic
    acid lignin, J. Wood Chem. Technol., 36 (2016) 173–181. 
-  Z. Sun, K. Qu, Y. Cheng, Y. You, Z. Huang, A. Umar, Y.S. Ibrahim,
    H. Algadi, L. Castañeda, H.A. Colorado, Corncob-derived
    activated carbon for efficient adsorption dye in sewage, ES Food
    Agrofor., 4 (2021) 61–73. 
-  H. Sudrajat, A. Susanti, D.K.Y. Putri, S. Hartuti, Mechanistic
    insights into the adsorption of methylene blue by particulate
    durian peel waste in water, Water Sci. Technol., 84 (2021)
    1774–1792. 
-  X. Ma, Y. Liu, Q. Zhang, S. Sun, X. Zhou, Y. Xu, A novel natural
    lignocellulosic biosorbent of sunflower stem-pith for textile
    cationic dyes adsorption, J. Cleaner Prod., 331 (2021) 129878,
    doi: 10.1016/j.jclepro.2021.129878. 
-  S.H. Paiman, M.A. Rahman, T. Uchikoshi, N. Abdullah,
    M.H.D. Othman, J. Jaafar, K.H. Abas, A.F. Ismail, Functionalization
    effect of Fe-type MOF for methylene blue adsorption,
    J. Saudi Chem. Soc., 24 (2020) 896–905. 
-  M. Nazaripour, M.A.M. Reshadi, S.A. Mirbagheri,
    M. Nazaripour, A. Bazargan, Research trends of heavy metal
    removal from aqueous environments, J. Environ. Manage.,
    287 (2021) 112322, doi:10.1016/j.jenvman.2021.112322. 
-  B. Qiu, X. Tao, H. Wang, W. Li, X. Ding, H. Chu, Biochar as a
    low-cost adsorbent for aqueous heavy metal removal: a review,
    J. Anal. Appl. Pyrolysis, 155 (2021) 105081, doi: 10.1016/j.
    jaap.2021.105081. 
-  M. Yadav, G. Singh, R.N. Jadeja, Physical and Chemical
    Methods for Heavy Metal Removal, P. Singh, R. Singh, V. Kumar
    Singh, R. Bhadouria, Eds., Pollutants and Water Management:
    Resources, Strategies and Scarcity, 2021, pp. 377–397. 
-  U.W.R. Siagian, K. Khoiruddin, A.K. Wardani, P.T.P. Aryanti,
    I. Nyoman Widiasa, G. Qiu, Y.P. Ting, I. Gede Wenten, Highperformance
    ultrafiltration membrane: recent progress and
    its application for wastewater treatment, Curr. Pollut. Rep.,
    7 (2021) 448–462, doi: 10.1007/s40726-021-00204-5. 
-  S. Xue, Y. Xiao, G. Wang, J. Fan, K. Wan, Q. He, M. Gao,
    Z. Miao, Adsorption of heavy metals in water by modifying
	  Fe3O4 nanoparticles with oxidized humic acid, Colloids Surf.,
  A, 616 (2021) 126333, doi:10.1016/j.colsurfa.2021.126333. 
-  M. Kanoje, M. Bhor, S. Toche, P. Jadhav, Removal of zinc from
    industrial wastewater using rice husk and activated carbon,
    Int. Res. J. Eng. Technol., 8 (2021) 2188–2190. 
-  N.A.A. Qasem, R.H. Mohammed, D.U. Lawal, Removal of
    heavy metal ions from wastewater: a comprehensive and
    critical review, npj Clean Water, 4 (2021) 1–15, doi: 10.1038/s41545-021-00127-0. 
-  M.S. Manna, C. Bhaumik, Opportunities and Challenges,
    Inamuddin, M.I. Ahamed, E. Lichtfouse, T. Altalhi, Eds.,
    Remediation of Heavy Metals. Environmental Chemistry for a
    Sustainable World, Vol. 70, Springer, Cham, 2021, pp. 347–366. 
-  A. Tripathi, M.R. Ranjan, Heavy metal removal from wastewater
    using low cost adsorbents, J. Biorem. Biodegrad., 6 (2015) 315. 
-  Z. Zhang, T. Wang, H. Zhang, Y. Liu, B. Xing, Adsorption
    of Pb(II) and Cd(II) by magnetic activated carbon and its
    mechanism, Sci. Total Environ., 757 (2021) 143910, doi: 10.1016/j.scitotenv.2020.143910. 
-  D.R. Lobato-Peralta, E. Duque-Brito, A. Ayala-Cortés,
    D.M. Arias, A. Longoria, A.K. Cuentas-Gallegos, 
 P.J. Sebastian,
    P.U. Okoye, Advances in activated carbon modification, surface
    heteroatom configuration, reactor strategies, and regeneration
    methods for enhanced wastewater treatment, J. Environ. Chem.
    Eng., 9 (2021) 105626, doi: 10.1016/j.jece.2021.105626.
-  H. Yi, K. Nakabayashi, S.-H. Yoon, J. Miyawaki, Pressurized
    physical activation: a simple production method for activated
    carbon with a highly developed pore structure, Carbon,
    183 (2021) 735–742. 
-  J. Nyirenda, K. Zombe, G. Kalaba, C. Siabbamba, I. Mukela,
    Exhaustive valorization of cashew nut shell waste as a potential
    bioresource material, Sci. Rep., 11 (2021) 1–14, doi: 10.1038/s41598-021-91571-y. 
-  G. Kaur, N. Singh, A. Rajor, Adsorption of doxycycline
    hydrochloride onto powdered activated carbon synthesized
    from pumpkin seed shell by microwave-assisted pyrolysis,
    Environ. Technol. Innovation, 23 (2021) 101601, doi: 10.1016/j.eti.2021.101601. 
-  E.R. Raut, A.B. Thakur, A.R. Chaudhari, Review on toxic
    metal ions removal by using activated carbon prepared from
    natural biomaterials, J. Phys. Conf. Ser., 1913 (2021) 012091. 
-  Y. Gokce, S. Yaglikci, E. Yagmur, A. Banford, Z. Aktas,
    Adsorption behaviour of high performance activated carbon
    from demineralised low rank coal (Rawdon) for methylene
    blue and phenol, J. Environ. Chem. Eng., 9 (2021) 104819,
    doi: 10.1016/j.jece.2020.104819. 
-  M. Om Prakash, G. Raghavendra, S. Ojha, M. Panchal,
    Characterization of porous activated carbon prepared from
    arhar stalks by single step chemical activation method, Mater.
    Today: Proc., 39 (2021) 1476–1481. 
-  L. Pandey, S. Sarkar, A. Arya, A.L. Sharma, A. Panwar,
    R.K. Kotnala, A. Gaur, Fabrication of activated carbon
    electrodes derived from peanut shell for high-performance
    supercapacitors, Biomass Convers. Biorefin., (2021) 1–10,
    doi: 10.1007/s13399-021-01701-9. 
-  P. Senthil Kumar, S. Ramalingam, R.V. Abhinaya,
    K.V. Thiruvengadaravi, P. Baskaralingam, S. Sivanesan, Lead(II)
    adsorption onto sulphuric acid treated cashew nut shell, Sep.
    Sci. Technol., 46 (2011) 2436–2449. 
-  A.M. Alkherraz, A.K. Ali, K.M. Elsherif, Removal of Pb(II),
    Zn(II), Cu(II) and Cd(II) from aqueous solutions by adsorption
    onto olive branches activated carbon: equilibrium and thermodynamic
    studies, Chem. Int., 6 (2020) 11–20. 
-  Z.M. Yunus, A. Al-Gheethi, N. Othman, R. Hamdan, N.N. Ruslan,
    Removal of heavy metals from mining effluents in tile and
    electroplating industries using honeydew peel activated carbon:
    a microstructure and techno-economic analysis, J. Cleaner Prod.,
    251 (2020) 119738, doi: 10.1016/j.jclepro.2019.119738. 
-  V. Nejadshafiee, M.R. Islami, Intelligent-activated carbon
    prepared from pistachio shells precursor for effective adsorption
    of heavy metals from industrial waste of copper mine, Environ.
    Sci. Pollut. Res., 27 (2020) 1625–1639. 
-  V. Nejadshafiee, M.R. Islami, Bioadsorbent from magnetic
    activated carbon hybrid for removal of dye and pesticide,
    ChemistrySelect, 5 (2020) 8814–8822. 
-  T.M. Alslaibi, I. Abustan, M.A. Ahmad, A.A. Foul, Kinetics and
    equilibrium adsorption of iron(II), lead(II), and copper(II) onto
    activated carbon prepared from olive stone waste, Desal. Water
    Treat., 52 (2014) 7887–7897. 
-  R. Srivastava, D.C. Rupainwar, A comparative evaluation
    for adsorption of dye on Neem bark and Mango bark powder,
    Indian J. Chem. Technol., 18 (2011) 67–75. 
-  A.R. Kaveeshwar, S.K. Ponnusamy, E.D. Revellame, D.D. Gang,
    M.E. Zappi, R. Subramaniam, Pecan shell based activated
    carbon for removal of iron(II) from fracking wastewater:
    adsorption kinetics, isotherm and thermodynamic studies,
    Process Saf. Environ. Prot., 114 (2018) 107–122. 
-  P. Mishra, K. Singh, U. Dixit, Adsorption, kinetics and
    thermodynamics of phenol removal by ultrasound-assisted
    sulfuric acid-treated pea (Pisum sativum) shells, Sustainable
    Chem. Pharm., 22 (2021) 100491, doi:10.1016/j.scp.2021.100491. 
-  J.S. Piccin, G. Dotto, L.A.A. Pinto, Adsorption isotherms and
    thermochemical data of FDandC Red N°40 binding by chitosan,
    Braz. J. Chem. Eng., 28 (2011) 295–304. 
-  O. Üner, Ü. Geçgel, Y. Bayrak, Adsorption of methylene blue
    by an efficient activated carbon prepared from Citrullus lanatus
    rind: kinetic, isotherm, thermodynamic, and mechanism
    analysis, Water, Air, Soil Pollut., 227 (2016) 1–15, doi: 10.1007/s11270-016-2949-1. 
-  M.S. Abdelbassit, K.R. Alhooshani, T.A. Saleh, Silica
    nanoparticles loaded on activated carbon for simultaneous
    removal of dichloromethane, trichloromethane, and carbon
    tetrachloride, Adv. Powder Technol., 27 (2016) 1719–1729. 
-  M.S. Santana, R.P. Alves, L.S. Santana, M.A. Gonçalves,
    M.C. Guerreiro, Structural, inorganic, and adsorptive properties
    of hydrochars obtained by hydrothermal carbonization of coffee
    waste, J. Environ. Manage., 302 (2022) 114021, doi: 10.1016/j.
    jenvman.2021.114021. 
-  Darmadi, Mahidin, S.S. Azzahra, M. Masrura, Adsorption of
    mercury(II) ion in aqueous solution by using bentonite-based
    monolith, Key Eng. Mater., 885 (2021) 77–84. 
-  M.N. Alnajrani, O.A. Alsager, Removal of antibiotics from
    water by polymer of intrinsic microporosity: isotherms,
    kinetics, thermodynamics, and adsorption mechanism, Sci.
    Rep., 10 (2020) 1–14, doi:10.1038/s41598-020-57616-4. 
-  A.N. Kani, E. Dovi, F.M. Mpatani, Z. Li, R. Han, L. Qu, Tiger
    nut residue as a renewable adsorbent for methylene blue
    removal from solution: adsorption kinetics, isotherm, and
    thermodynamic studies, Desal. Water Treat., 191 (2020)
    426–437. 
-  K.H. Karim, Copper adsorption behavior in some calcareous
    soils using Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich models, J. Soil Sci. Agric. Eng., 11 (2020) 27–34. 
-  P.M. Sanka, M.J. Rwiza, K.M. Mtei, Removal of selected heavy
    metal ions from industrial wastewater using rice and corn husk
    biochar, Water, Air, Soil Pollut., 231 (2020) 1–13, doi: 10.1007/
    s11270-020-04624-9. 
-  R. Gupta, S.K. Gupta, D.D. Pathak, Selective adsorption of toxic
    heavy metal ions using guanine-functionalized mesoporous
    silica [SBA-16-g] from aqueous solution, Microporous
    Mesoporous Mater., 288 (2019) 109577, doi: 10.1016/j.
    micromeso.2019.109577. 
-  B. Meroufel, O. Benali, M. Benyahia, Y. Benmoussa, M. Zenasni,
    Adsorptive removal of anionic dye from aqueous solutions
    by Algerian kaolin: characteristics, isotherm, kinetic and
    thermodynamic studies, J. Mater. Environ. Sci., 4 (2013) 482–491. 
-  N. Vučković, M. Nikodijević, D. Đorđеvić, The study of direct
    dye sorption on flax fibers during dyeing, Chem. Ind. Chem.
    Eng. Q., 27 (2021) 255–263. 
-  R. Ediati, M.A. Setyani, D.O. Sulistiono, E. Santoso, D. Hartanto,
    M.M.A.B. Abdullah, Optimization of the use of mother liquor
    in the synthesis of HKUST-1 and their performance for removal
    of chromium(VI) in aqueous solutions, J. Water Process Eng.,
    39 (2021) 101670, doi: 10.1016/j.jwpe.2020.101670. 
-  M.E. González-López, C.M. Laureano-Anzaldo, A.A. Pérez-Fonseca, M. Arellano, J.R. Robledo-Ortíz, A critical overview
    of adsorption models linearization: methodological and
    statistical inconsistencies, Sep. Purif. Rev., (2021) 1–15,
    doi: 10.1080/15422119.2021.1951757. 
-  G.K. Rajahmundry, C. Garlapati, P.S. Kumar, R.S. Alwi,
    D.-V.N. Vo, Statistical analysis of adsorption isotherm models
    and its appropriate selection, Chemosphere, 276 (2021) 130176,
    doi:10.1016/j.chemosphere.2021.130176. 
-  A. Agarwal, M. Rastogi, N.B. Singh, Agricultural Wastes
    Utilization in Water Purification, in: Inorganic-Organic
    Composites for Water and Wastewater Treatment, Vol. 1,
    Springer, Hong Kong, 2022, pp. 147–168. 
-  M. Sadani, T. Rasolevandi, H. Azarpira, A.H. Mahvi,
    M. Ghaderpoori, S.M. Mohseni, A. Atamaleki, Arsenic selective
    adsorption using a nanomagnetic ion imprinted polymer:
    optimization, equilibrium, and regeneration studies, J. Mol.
    Liq., 317 (2020) 114246, doi: 10.1016/j.molliq.2020.114246. 
-  K.A.M. Said, N.Z. Ismail, R.L. Jama’in, N.A.M. Alipah,
    N.M. Sutan, G.G. Gadung, R. Baini, N.S.A. Zauzi, Application
    of Freundlich and Temkin isotherm to study the removal of
    Pb(II) via adsorption on activated carbon equipped polysulfone
    membrane, Int. J. Eng. Technol., 7 (2018) 91–93. 
-  S. Tan, K. Saito, M.T.W. Hearn, Isothermal modelling of protein
    adsorption to thermo‐responsive polymer grafted Sepharose
    Fast Flow sorbents, J. Sep. Sci., 44 (2021) 1884–1892. 
-  K. Nuithitikul, R. Phromrak, W. Saengngoen, Utilization of
    chemically treated cashew-nut shell as potential adsorbent
    for removal of Pb(II) ions from aqueous solution, Sci. Rep.,
    10 (2020) 1–14, 
 doi: 10.1038/s41598-020-60161-9.
-  K.P.D.A. N’goran, D. Diabaté, K.M. Yao, N.L.B. Kouassi,
    U.P. Gnonsoro, K.C. Kinimo, A. Trokourey, Lead and cadmium
    removal from natural freshwater using mixed activated carbons
    from cashew and shea nut shells, Arabian J. Geosci., 11 (2018)
    1–12, doi: 10.1007/s12517-018-3862-2. 
-  V. Manirethan, R.M. Balakrishnan, Batch and continuous studies
    on the removal of heavy metals using biosynthesised melanin
    impregnated activated carbon, Environ. Technol. Innovation,
    20 (2020) 101085, doi:10.1016/j.eti.2020.101085. 
-  R. Shahrokhi-Shahraki, C. Benally, M.G. El-Din, J. Park, High
    efficiency removal of heavy metals using tire-derived activated
    carbon vs commercial activated carbon: insights into the
    adsorption mechanisms, Chemosphere, 264 (2021) 128455,
    doi: 10.1016/j.chemosphere.2020.128455. 
-  G.K.R. Angaru, Y.-L. Choi, L.P. Lingamdinne, J.-S. Choi,
    D.-S. Kim, J.R. Koduru, J.-K. Yang, Y.-Y. Chang, Facile synthesis
    of economical feasible fly ash–based zeolite–supported nano
    zerovalent iron and nickel bimetallic composite for the potential
    removal of heavy metals from industrial effluents, Chemosphere,
    267 (2021) 128889, doi: 10.1016/j.chemosphere.2020.128889. 
-  E.K. Leizou, M.A. Ashraf, A.J.K. Chowdhury, H. Rashid,
	  Adsorption studies of Pb2+ and Mn2+ ions on low-cost adsorbent:
    unripe plantain (Musa paradisiaca) peel biomass, Acta Chem.
    Malaysia (ACMY), 2 (2018) 11–15. 
-  K. Sudha Rani, B. Srinivas, K. GouruNaidu, K.V. Ramesh,
    Removal of copper by adsorption on treated laterite, Mater.
    Today: Proc., 5 (2018) 463–469. 
-  H. Sivasankari, K. Ramesh, A. Rajappa, Influence of acid and
    base surface modification on Cr(VI) ions adsorption onto
    activated carbons prepared from bark of Thespesia populnea - isotherm
    and thermodynamics study, J. Adv. Sci. Res., 12 (2021)
    314–324. 
-  M. Shafiq, A. Alazba, M.T. Amin, Removal of heavy metals from
    wastewater using date palm as a biosorbent: a comparative
    review, Sains Malaysiana, 47 (2018) 35–49. 
-  U. Maheshwari, Removal of Metal Ions From Wastewater
    Using Adsorption: Experimental and Theoretical Studies, Birla
    Institute of Technology and Science, Pilani, Thesis, 2015. 
-  M.U. Tahir, X. Su, M. Zhao, Y. Liao, R. Wu, D. Chen,
	  Preparation of hydroxypropyl-cyclodextrin-graphene/
 Fe3O4
    and its adsorption properties for heavy metals, Surf. Interfaces,
    16 (2019) 43–49.
-  L. Dong, L. Hou, Z. Wang, P. Gu, G. Chen, R. Jiang, A new
    function of spent activated carbon in BAC process: removing
    heavy metals by ion exchange mechanism, J. Hazard. Mater.,
    359 (2018) 76–84. 
-  K.H. Chu, Revisiting the Temkin isotherm: dimensional
    inconsistency and approximate forms, Ind. Eng. Chem. Res.,
    60 (2021) 13140–13147. 
-  E. Ernest, O. Onyeka, C.M. Aburu, C.C. Aniobi, J.O. Ndubuisi,
    Adsorption efficiency of activated carbon produced from corn
    cob for the removal of cadmium ions from aqueous solution,
    Acad. J. Chem., 4 (2019) 12–20. 
-  S. Abdulrazak, K. Hussaini, H.M. Sani, Evaluation of removal
    efficiency of heavy metals by low-cost activated carbon
    prepared from African palm fruit, Appl. Water Sci., 7 (2017)
    3151–3155. 
-  T. Van Tran, Q.T.P. Bui, T.D. Nguyen, N.T.H. Le, L.G. Bach,
    A comparative study on the removal efficiency of metal ions
	  (Cu2+, Ni2+, and Pb2+) using sugarcane bagasse-derived ZnCl2-activated carbon by the response surface methodology, Adsorpt.
  Sci. Technol., 35 (2017) 72–85. 
-  S. Ayub, A.A. Mohammadi, M. Yousefi, F. Changani,
    Performance evaluation of agro-based adsorbents for the
    removal of cadmium from wastewater, Desal. Water Treat.,
    142 (2019) 293–299. 
-  S. Saputro, L. Mahardiani, M. Masykuri, A.Z. Jazuli, The
    effectiveness of the activated carbon from coconut shell and
    corn cob to adsorb Pb(II) ion and it’s analysis using solid-phase
    spectrophotometry, IOP Conf. Ser.: Mater. Sci. Eng., 578 (2019)
    012020. 
-  A.H. Jawad, S.A. Mohammed, M.S. Mastuli, M.F. Abdullah,
    Carbonization of corn (Zea mays) cob agricultural residue
    by one-step activation with sulfuric acid for methylene blue
    adsorption, Desal. Water Treat., 118 (2018) 342–351. 
-  C. Yu, H. Wang, M. Lu, F. Zhu, Y. Yang, H. Huang, C. Zou,
    J. Xiong, Z. Zhong, Application of rice straw, corn cob, and lotus
    leaf as agricultural waste derived catalysts for low temperature
    SCR process: optimization of preparation process, catalytic
    activity and characterization, Aerosol Air Qual. Res., 20 (2020)
    862–876. 
-  A.H. Jawad, A.S. Abdulhameed, M.S. Mastuli, Acidfactionalized
    biomass material for methylene blue dye removal:
    a comprehensive adsorption and mechanism study, J. Taibah
    Univ. Sci., 14 (2020) 305–313. 
-  U. Farooq, M.A. Khan, M. Athar, J.A. Kozinski, Effect of
    modification of environmentally friendly biosorbent wheat
    (Triticum aestivum) on the biosorptive removal of cadmium(II)
    ions from aqueous solution, Chem. Eng. J., 171 (2011) 400–410. 
-  M.O. Bello, N. Abdus-Salam, F.A. Adekola, U. Pal, Isotherm and
    kinetic studies of adsorption of methylene blue using activated
    carbon from ackee apple pods, Chem. Data Collect., 31 (2021)
    100607, doi:10.1016/j.cdc.2020.100607. 
-  M.A. Ahmad, M.A. Eusoff, P.O. Oladoye, K.A. Adegoke,
    O.S. Bello, Optimization and batch studies on adsorption
    of Methylene blue dye using pomegranate fruit peel based
    adsorbent, Chem. Data Collect., 32 (2021) 100676, doi: 10.1016/j.cdc.2021.100676. 
-  C. Zou, W. Jiang, J. Liang, X. Sun, Y. Guan, Removal of Pb(II)
    from aqueous solutions by adsorption on magnetic bentonite,
    Environ. Sci. Pollut. Res., 26 (2019) 1315–1322. 
-  S. Tahazadeh, T. Mohammadi, M.A. Tofighy, S. Khanlari,
    H. Karimi, H.B.M. Emrooz, Development of cellulose acetate/metal-organic framework derived porous carbon adsorptive
    membrane for dye removal applications, J. Membr. Sci.,
    638 (2021) 119692, doi: 10.1016/j.memsci.2021.119692. 
-  K.L. Yu, X.J. Lee, H.C. Ong, W.-H. Chen, J.-S. Chang,
    C.-S. Lin, P.L. Show, T.C. Ling, Adsorptive removal of cationic
    methylene blue and anionic Congo red dyes using wet-torrefied
    microalgal biochar: equilibrium, kinetic and mechanism
    modeling, Environ. Pollut., 272 (2021) 115986, doi: 10.1016/j.
    envpol.2020.115986. 
-  D. Obregón-Valencia, M. del Rosario Sun-Kou, Comparative
    cadmium adsorption study on activated carbon prepared from
    aguaje (Mauritia flexuosa) and olive fruit stones (Olea europaea L.), J. Environ. Chem. Eng., 2 (2014) 2280–2288. 
-  K.-Y. Shin, J.-Y. Hong, J. Jang, Heavy metal ion adsorption
    behavior in nitrogen-doped magnetic carbon nanoparticles:
    isotherms and kinetic study, J. Hazard. Mater., 190 (2011) 36–44. 
-  Y. Miyah, A. Lahrichi, M. Idrissi, Removal of cationic dye –
    methylene blue – from aqueous solution by adsorption onto corn
    cob powder calcined, J. Mater. Environ. Sci., 7 (2016) 96–104. 
-  P.M.K. Reddy, P. Verma, C. Subrahmanyam, Bio-waste derived
    adsorbent material for methylene blue adsorption, J. Taiwan
	  Inst. Chem. Eng., 58 (2016) 500–508.