Valorization of organic waste as biosorbents for wastewater treatment

Abstract

With increasing population and waste generation, organic waste disposal has presented an unprecedented challenge. Valorization of the waste for wastewater treatment emerges as a feasible way to recycle or upcycle the waste. Agricultural and non-agricultural waste has been successfully converted into biosorbents to remove various pollutants. Through reviewing 126 papers, this review aims to provide a comprehensive overview of the effectiveness and mechanisms of biosorbents from organic waste in adsorbing different organic and inorganic waste. Most recent studies have focused on using biosorbents to remove dyes, pharmaceuticals, and heavy metals. The biosorbents were synthesized primarily through drying and pulverization, or pyrolysis. Some biosorbents have been chemically treated with acids, alkalis, or salts to increase their surface functional groups. Furthermore, different biomass materials have also been combined to synthesize biocomposite sorbents. The extraction of lignocellulose and chitin from biomass as biosorbents is also common. Biosorption occurs via chemisorption and physisorption, with the former more prevalent among organic pollutants and the latter among inorganic pollutants. The Langmuir isotherm model, which indicates monolayer sorption, and the pseudo-second-order kinetic model, which implies chemisorption as rate-limiting, best describe most of the biosorption data. Biosorption is governed mainly by pH, temperature, initial pollutant concentrations, dosage and size of biosorbents, and contact time. This review highlights the need to standardize optimization procedures and develop cost-effective and scalable biosorption systems. It highlights the potential of biosorbents, especially biochar, as potential substitutes for activated carbon in the column adsorption process of tertiary wastewater treatment.

Keywords

Biosorption / dyes / heavy metals / pyrolysis / Langmuir isotherm / valorization

References

[1] Fang Y,Zhang L.A novel Zr-P-modified nanomagnetic herbal biochar immobilized Cd and Pb in water and soil and enhanced the relative abundance of metal-resistant bacteria: biogeochemical and spectroscopic investigations to identify the governing factors and potential mechanisms.Chem Eng J2024;485:149978

[2] The World Bank. Trends in solid waste management. Available from: https://datatopics.worldbank.org/what-a-waste/trends_in_solid_waste_management.html. [Last accessed on 16 Dec 2024]

[3] UN Environment Programme. Solid waste management. Available from: https://www.unep.org/explore-topics/resource-efficiency/what-we-do/cities/solid-waste-management. [Last accessed on 16 Dec 2024]

[4] Lizundia E,Puglia D.Organic waste valorisation towards circular and sustainable biocomposites.Green Chem2022;24:5429-59

[5] Tang KHD.Valorization of plastic waste through incorporation into construction materials.Civ Sustain Urban Eng2022;2:96-109

[6] Tang KHD.Attitudes towards plastic pollution: a review and mitigations beyond circular economy.Waste2023;1:569-87

[7] Wang Y,Yi G.Sulfur-aided aerobic biostabilization of swine manure and sawdust mixture: humification and carbon loss.Bioresour Technol2023;387:129602

[8] Srivastava A.Food waste valorization for handling environmental problems: a review.Environ Sustain2022;5:401-21

[9] Mo J,Zhang N,Zheng Y.A review on agro-industrial waste (AIW) derived adsorbents for water and wastewater treatment.J Environ Manage2018;227:395-405

[10] Torres E.Biosorption: a review of the latest advances.Processes2020;8:1584

[11] Nematollahzadeh A.Biosorbents in industrial wastewater treatment. In: Karchiyappan T, Karri RR, Dehghani MH, editors. Industrial wastewater treatment. Springer International Publishing: Cham; 2022. pp. 101-32.

[12] Karim A,Karam A.Valorization of fibrous plant-based food waste as biosorbents for remediation of heavy metals from wastewater - a review.Molecules2023;28:4205 PMCID:PMC10221818

[13] Okoro HK,Ogunkunle CO.Nanomaterial-based biosorbents: adsorbent for efficient removal of selected organic pollutants from industrial wastewater.Emerg Contam2022;8:46-58

[14] Karić N,Teodorović A.Bio-waste valorisation: agricultural wastes as biosorbents for removal of (in)organic pollutants in wastewater treatment.Chem Eng J Advs2022;9:100239

[15] Anastopoulos I,Hosseini-Bandegharaei A.Agricultural biomass/waste as adsorbents for toxic metal decontamination of aqueous solutions.J Mol Liq2019;295:111684

[16] Tokay B.A comparative study of heavy metals removal using agricultural waste biosorbents.Bioresour Technol Rep2021;15:100719

[17] Shakoor MB,Bibi I.Remediation of arsenic-contaminated water using agricultural wastes as biosorbents.Crit Rev Env Sci Technol2016;46:467-99

[18] Park D,Park JM.The past, present, and future trends of biosorption.Biotechnol Bioproc E2010;15:86-102

[19] Dai Y,Wang W.Utilizations of agricultural waste as adsorbent for the removal of contaminants: a review.Chemosphere2018;211:235-53

[20] Popovic AL,Velickovic Z.Kinetics and column adsorption study of diclofenac and heavy-metal ions removal by amino-functionalized lignin microspheres.J Ind Eng Chem2021;93:302-14

[21] Godinho D,Bernardo M.Recovery of Cr(III) by using chars from the co-gasification of agriculture and forestry wastes.Environ Sci Pollut Res Int2019;26:22723-35

[22] Liu G,Liu X,Xu J.Modification of agricultural wastes to improve sorption capacities for pollutant removal from water - a review.Carbon Res2022;1:25

[23] De Gisi S, Lofrano G, Grassi M, Notarnicola M. Characteristics and adsorption capacities of low-cost sorbents for wastewater treatment: a review.Sustain Mater Technol2016;9:10-40

[24] Kosheleva RI,Kyzas GZ.Synthesis of activated carbon from food waste.Environ Chem Lett2019;17:429-38

[25] Pathak PD,Kulkarni BD.Fruit peel waste as a novel low-cost bio adsorbent. 2015;31:361-81.

[26] Tang KHD.Advances and feasibility of biocatalytic technologies for dye removal.Res in Ecol2024;6:1-15

[27] Tang KHD,Alkahtani AM,Karácsony P.Biological removal of dyes from wastewater: a review of its efficiency and advances.Trop Aqua Soil Pollut2022;2:59-75

[28] Sawicka B,Vambol V.Organic micropollutants in wastewaters: advances in sustainable management and treatment methods. In: Bhadouria R, Tripathi S, Singh P, Singh R, Singh HP, editors. Organic micropollutants in aquatic and terrestrial environments. Springer, Cham; 2024. pp. 225-47.

[29] Kumar A,Tyagi D,Kapinder .Organic micropollutants and their effects on the environment and human health. In: Bhadouria R, Tripathi S, Singh P, Singh R, Singh HP, editors. Organic micropollutants in aquatic and terrestrial environments. Springer Nature Switzerland: Cham; 2024. pp. 87-105.

[30] Rani KC,Chaurasiya RS.Removal of toxic Congo red dye from water employing low-cost coconut residual fiber.Water Sci Technol2017;75:2225-36

[31] Bello OS,Fagbenro SO.Functionalized coconut husks for rhodamine-B dye sequestration.Appl Water Sci2019;9:1051

[32] Karri RR,Jayakumar N.Optimal isotherm parameters for phenol adsorption from aqueous solutions onto coconut shell based activated carbon: error analysis of linear and non-linear methods.J Taiwan Instf Chem Eng2017;80:472-87

[33] Saritha B.Adsorption study on removal of basic dye by modified coconut shell adsorbent.Int J Civ Eng Technol2017;8:1370-4Available from: https://iaeme.com/MasterAdmin/Journal_uploads/IJCIET/VOLUME_11_ISSUE_8/IJCIET_08_08_149.pdf. [Last accessed on 16 Dec 2024]

[34] Luo Y,Sun X,Li D.The roles of phosphorus species formed in activated biochar from rice husk in the treatment of landfill leachate.Bioresour Technol2019;288:121533

[35] Kumar A,Dasgupta D,Mandal T.Simultaneous recovery of silica and treatment of rice mill wastewater using rice husk ash: an economic approach.Ecol Eng2015;84:29-37

[36] Guo H,Song D.Citric acid modified Camellia oleifera shell for removal of crystal violet and Pb(II): parameters study and kinetic and thermodynamic profile.Desalin Water Treat2016;57:15373-83

[37] Saba B,Khalid A,Christy AD.Effectiveness of rice agricultural waste, microbes and wetland plants in the removal of reactive black-5 azo dye in microcosm constructed wetlands.Int J Phytoremediation2015;17:1060-7

[38] Gupta H.Adsorption of polycyclic aromatic hydrocarbons on banana peel activated carbon.Desalin Water Treat2016;57:9498-509

[39] Ali MEM,Ammar NS.Response surface methodology for optimization of the adsorption capability of ball-milled pomegranate peel for different pollutants.J Mol Liq2018;250:433-45

[40] Mallampati R,Adin A.Fruit peels as efficient renewable adsorbents for removal of dissolved heavy metals and dyes from water.ACS Sustain Chem Eng2015;3:1117-24

[41] Jusufi K,Berisha A. Potential application of orange peels as bio-sorbents in the removal of organic molecules from wastewater. In: Proceedings of the Fourth International Conference on Radiation and Applications in Various Fields of Research, Serbia. 2016; pp. 176-8. Available from: https://www.rad-proceedings.org/papers/RadProc.2016.41.pdf. [Last accessed on 16 Dec 2024]

[42] Romero-Cano LA,Baldenegro-Perez LA.Preparation of orange peels by instant controlled pressure drop and chemical modification for its use as biosorbent of organic pollutants.Rev Mex Ing Quím2016;15:481-91Available from: https://www.redalyc.org/pdf/620/62046829015.pdf. [Last accessed on 16 Dec 2024]

[43] Akkari I,Bezzi N.Biosorption of basic red 46 using raw cactus fruit peels: equilibrium, kinetic and thermodynamic studies.Biomass Conv Bioref2024;14:1825-36

[44] Yan B,Wang J.Kinetics, electron-donor-acceptor interactions, and site energy distribution analyses of norfloxacin adsorption on pretreated barley straw.Chem Eng J2017;330:1211-21

[45] Zhang L,Zhu P.Adsorption of chlortetracycline onto biochar derived from corn cob and sugarcane bagasse.Water Sci Technol2018;78:1336-47

[46] Ge H,Liu S.Synthesis of citric acid functionalized magnetic graphene oxide coated corn straw for methylene blue adsorption.Bioresour Technol2016;221:419-29

[47] Cheng M,Huang D.Combined biological removal of methylene blue from aqueous solutions using rice straw and Phanerochaete chrysosporium.Appl Microbiol Biotechnol2015;99:5247-56

[48] Ribeiro AC,Vidovix TB,Duarte EDCNFA.Synthesis of a novel functionalized biosorbent from mango stone and its application in the pharmaceutical’s removal from water and a synthetic mixture.Chemosphere2024;346:140520

[49] Khelifi O. Equilibrium, kinetics and thermodynamics studies of methylene blue adsorption from aqueous solutions by biosorbent derived from Algerian date stones. J Water Sci Environ Technol 2016. Available from: https://revues.imist.ma/index.php/JOWSET/article/view/6830. [Last accessed on 16 Dec 2024]

[50] Bo L,Liu J.The competitive adsorption of pharmaceuticals on granular activated carbon in secondary effluent.Desalin Water Treat2016;57:17023-9

[51] Chang EE,Kim H,Dai YD.Adsorption of selected pharmaceutical compounds onto activated carbon in dilute aqueous solutions exemplified by acetaminophen, diclofenac, and sulfamethoxazole.ScientificWorldJournal2015;2015:186501 PMCID:PMC4452490

[52] Ali A.Phenol removal from aqueous medium using chemically modified banana peels as low-cost adsorbent.Desalin Water Treat2016;57:11242-54

[53] Pawar S,Hiremath PG.Synthesis of hydroxyapatite from avocado fruit peel and its application for hexavalent chromium removal from aqueous solutions-adsorption isotherms and kinetics study.Adsorption2019;12:1964-72

[54] Wu C,Xue SG.Arsenic sorption by red mud-modified biochar produced from rice straw.Environ Sci Pollut Res Int2017;24:18168-78

[55] Guo J.Enhancing biological removal of methylene blue from aqueous solutions using Bacillus subtilis inoculated rice straw.J Environ Eng2019;145:1478

[56] Herrera-García U,Patiño-Ruiz D,Herrera A.Activated carbon from yam peels modified with Fe₃O₄ for removal of 2,4-dichlorophenoxyacetic acid in aqueous solution.Water2019;11:2342

[57] Mohamed G,Fathy NA.Preparation of carbonaceous hydrochar adsorbents from cellulose and lignin derived from rice straw.Egypt J Chem2017;60:793-804

[58] Naghdi M,Pulicharla R.Pine-wood derived nanobiochar for removal of carbamazepine from aqueous media: adsorption behavior and influential parameters.Arab J Chem2019;12:5292-301

[59] Yu P,Wu D,Lv W.Accumulation of polystyrene microplastics in juvenile Eriocheir sinensis and oxidative stress effects in the liver.Aquat Toxicol2018;200:28-36

[60] Debnath B,Mukherjee T,Das A.Chapter 12 - Sorbents from waste materials: a circular economic approach. In: Sorbents materials for controlling environmental pollution. Elsevier: 2021. pp. 285-322.

[61] Konga A,Hariharaprabhu T,Solaman TR.Studies o n removal of Cu²⁺ from effluent water by using rice husk.Asian J Microbiol Biotechnol Environ Exp Sci2015;17:115-21Available from: https://www.researchgate.net/publication/281874723_Studies_on_removal_of_Cu2_from_effluent_water_by_using_rice_husk. [Last accessed on 16 Dec 2024]

[62] Qu J,You H,Du Z.Utilization of rice husks functionalized with xanthates as cost-effective biosorbents for optimal Cd(II) removal from aqueous solution via response surface methodology.Bioresour Technol2017;241:1036-42

[63] Dias M,Henriques B.Nutshells as efficient biosorbents to remove cadmium, lead, and mercury from contaminated solutions.Int J Environ Res Public Health2021;18:1580 PMCID:PMC7914985

[64] Garg R,Sillanpää M.Rapid adsorptive removal of chromium from wastewater using walnut-derived biosorbents.Sci Rep2023;13:6859 PMCID:PMC10133242

[65] Ajmi RN,Hanno SH.Bioabsorbent of chromium, cadmium and lead from industrial waste water by waste plant.J Pharm Sci Res2018;10:672-4Available from: https://www.jpsr.pharmainfo.in/Documents/Volumes/vol10Issue03/jpsr10031853.pdf. [Last accessed on 16 Dec 2024]

[66] Oyewo OA,Wolkersdorfer C.Application of banana peels nanosorbent for the removal of radioactive minerals from real mine water.J Environ Radioact2016;164:369-76

[67] Singh J,Jaswal VS.Desalination of Cd²⁺ and Pb²⁺ from paint industrial wastewater by Aspergillus niger decomposed Citrus limetta peel powder.Int J Environ Sci Technol2015;12:2523-32

[68] Monroy-Figueroa J,Bonilla-Petriciolet A.Chemical modification of Byrsonima crassifolia with citric acid for the competitive sorption of heavy metals from water.Int J Environ Sci Technol2015;12:2867-80

[69] Yan J,Qiu H.Adsorption of heavy metals and methylene blue from aqueous solution with citric acid modified peach stone.Sep Sci Technol2018;53:1678-88

[70] Díaz-Muñoz LL,Reynel-Ávila HE.Sorption of heavy metal ions from aqueous solution using acid-treated avocado kernel seeds and its FTIR spectroscopy characterization.J Mol Liqs2016;215:555-64

[71] Lu XG.Removal of Pb (II) from aqueous solution by sulfur-functionalized walnut shell.Environ Sci Pollut Res Int2019;26:12776-87

[72] Dan Y,Qiang Z,Shi H.Preparation of green biosorbent using rice hull to preconcentrate, remove and recover heavy metal and other metal elements from water.Chemosphere2021;262:127940

[73] Surovka D,Sarcakova E,Bendova M. Adsorptive removal of sulphates from aqueous matrix using a fixed bed column packed with orange peel. In: Proceedings of the 15th International Multidisciplinary Scientific GeoConference (SCEM); Albena, Bulgaria. 2015; pp. 33-40.

[74] Nathan RJ,Barr D.Simultaneous removal of heavy metals from drinking water by banana, orange and potato peel beads: a study of biosorption kinetics.Appl Water Sci2021;11:1457

[75] Ahmadi H,Sharifi H,Habibi SS.Low cost biosorbent (Melon Peel) for effective removal of Cu (II), Cd (II), and Pb (II) ions from aqueous solution.Case Stud Chem Environ Eng2022;6:100242

[76] Bhadoria P,Khandelwal A.Preparation of modified rice straw-based bio-adsorbents for the improved removal of heavy metals from wastewater.Sustain Chem Pharm2022;29:100742

[77] Liu Q,Chen H.Superior adsorption capacity of functionalised straw adsorbent for dyes and heavy-metal ions.J Hazard Mater2020;382:121040

[78] Yu H,Yu J,Chi R.Adsorption performance and stability of the modified straws and their extracts of cellulose, lignin, and hemicellulose for Pb²⁺: pH effect.Arab J Chem2020;13:9019-33

[79] Mohammadabadi SI.Lignin extraction from barley straw using ultrasound-assisted treatment method for a lignin-based biocomposite preparation with remarkable adsorption capacity for heavy metal.Int J Biol Macromol2020;164:1133-48

[80] Šoštarić TD,Pastor FT.Study of heavy metals biosorption on native and alkali-treated apricot shells and its application in wastewater treatment.J Mol Liq2018;259:340-9

[81] Maity S,SenSharma S.Bioremediation of heavy metals from the aqueous environment using Artocarpus heterophyllus (jackfruit) seed as a novel biosorbent.Chemosphere2022;307:136115

[82] Kushwaha S,Chaudhary M.Utilization of Phyllanthus emblica fruit stone as a potential biomaterial for sustainable remediation of lead and cadmium ions from aqueous solutions.Molecules2022;27:3355 PMCID:PMC9148102

[83] Oladipo AA,Gazi M.High adsorptive potential of calcined magnetic biochar derived from banana peels for Cu²⁺, Hg²⁺, and Zn²⁺ ions removal in single and ternary systems.Environ Sci Pollut Res Int2019;26:31887-99

[84] Dieme MM,Gerente C,Diop SN.Sustainable conversion of agriculture wastes into activated carbons: energy balance and arsenic removal from water.Environ Technol2017;38:353-60

[85] Erabee IK,Jose B.Adsorptive treatment of landfill leachate using activated carbon modified with three different methods.KSCE J Civ Eng2018;22:1083-95

[86] Wang S,Zhou M.Biomass facilitated phase transformation of natural hematite at high temperatures and sorption of Cd²⁺ and Cu².Environ Int2019;124:473-81

[87] Wang T,Liu H,Zhou H.Adsorption characteristics and mechanisms of Pb²⁺ and Cd²⁺ by a new agricultural waste-Caragana korshinskii biomass derived biochar.Environ Sci Pollut Res Int2021;28:13800-18

[88] Escudero LB,Wuilloud RG.Recent advances on elemental biosorption.Environ Chem Lett2019;17:409-27

[89] Aranda-García E,Cristiani-Urbina E.Effect of ionic strength and coexisting ions on the biosorption of divalent nickel by the acorn shell of the oak Quercus crassipes Humb. & Bonpl.Processes2020;8:1229

[90] Pertile E,Dvorsky T.The removal of residual concentration of hazardous metals in wastewater from a neutralization station using biosorbent - a case study company Gutra, Czech Republic.Int J Environ Res Public Health2020;17:7225 PMCID:PMC7578924

[91] Devasena SS,Rani V,Pereira JJ.Studies on the efficiency of fish scale adsorbents for treatment of fish processing effluent.Env Prog Sustain Energy2023;42:e14195

[92] Gholami N,Ebrahimian Pirbazari A.Fabrication, characterization, regeneration and application of nanomagnetic Fe₃O₄@fish scale as a bio-adsorbent for removal of methylene blue.J Water Environ Nanotechnol2018;3:219-34

[93] Neves D,Ferreira JL.Ingestion of microplastics by commercial fish off the Portuguese coast.Mar Pollut Bull2015;101:119-26

[94] Vakili M,Zwain HM.Treatment of As(III)-contaminated food waste using alkali treatment and its potential application for methylene blue removal from aqueous solutions.J Water Proc Eng2023;55:104100

[95] Blaga AC,Cimpoesu R,Suteu D.Biosorbents based on biopolymers from natural sources and food waste to retain the methylene blue dye from the aqueous medium.Polymers2022;14:2728 PMCID:PMC9269617

[96] Domingues A,Rocha-Santos TAP,Pereira R.Biosorption potential of the shell of Corbicula fluminea towards olive oil mill waste.Int J Environ Sci Technol2022;19:5689-96

[97] Sharma A.A sustainable biosorption technique for treatment of industrial wastewater using snail shell dust (Bellamya bengalensis).Environ Monit Assess2023;195:389

[98] Elayadi F,Beniich N,El Adlouni C.Factorial design for optimizing and modeling the removal of organic pollutants from olive mill wastewater using a novel low-cost bioadsorbent.Water Air Soil Pollut2020;231:4695

[99] Su H,Zhang X.Ultrafine biosorbent from waste oyster shell: a comparative study of Congo red and Methylene blue adsorption.Bioresource Technol Rep2022;19:101124

[100] Saufi H,Aride J.Rhodamine B biosorption from aqueous solution using Eichhornia crassipes powders: Isotherm, kinetic and thermodynamic studies.Chem Data Collect2020;25:100330

[101] Kulkarni MR,Acharya A.Removal of crystal violet dye from aqueous solution using water hyacinth: equilibrium, kinetics and thermodynamics study.Resour Efficient Technol2017;3:71-7

[102] Patil SR,Jadhav JP.Sorption of crystal violet from aqueous solution using live roots of Eichhornia crassipes: kinetic, isotherm, phyto and cyto-genotoxicity studies.Environ Technol Innov2020;18:100648

[103] Nguyen VQ,Sy HL,Nguyen DK.Application of Mussell-derived biosorbent to remove NH₄⁺ from aqueous solution: equilibrium and kinetics.SN Appl Sci2021;3:4462

[104] Esmaeili H,Abed M.Removal of Cu (II), Co (II) and Pb (II) from synthetic and real wastewater using calcified Solamen Vaillanti snail shell.Desalin Water Treat2020;174:324-35

[105] Ali MEA,Selim AM,Elkady GM.Chitosan nanoparticles extracted from shrimp shells, application for removal of Fe(II) and Mn(II) from aqueous phases.Sep Sci Technol2018;53:2870-81

[106] Foroutan R,Fard MK.Equilibrium and kinetic studies of Pb (II) biosorption from aqueous solution using shrimp peel.Int Res J Appl Basic Sci2015;9:1954-65Available from: https://www.researchgate.net/publication/289673152_Equilibrium_and_kinetic_studies_of_Pb_II_biosorption_from_aqueous_solution_using_shrimp_peel. [Last accessed on 16 Dec 2024]

[107] Yen HY.Taguchi optimization for Cd(II) removal from aqueous solutions using oyster shell powders.Desalin Water Treat2016;57:20430-8

[108] Teshale F,Sahu O.Synthesized bioadsorbent from fish scale for chromium (III) removal.Micron2020;130:102817

[109] Akar T,Celik S,Tunali Akar S.Highly effective fish scale–based biochar as a recyclable and green material for toxic cadmium ion bioremoval from liquid phase.Biomass Conv Bioref2024;14:4869-82

[110] Kang J,Lee C.Fe-loaded biochar obtained from food waste for enhanced phosphate adsorption and its adsorption mechanism study via spectroscopic and experimental approach.J Environ Chem Eng2021;9:105751

[111] Hong SH,Kang JK.Synthesis of Fe-impregnated biochar from food waste for Selenium(VI) removal from aqueous solution through adsorption: Process optimization and assessment.Chemosphere2020;252:126475

[112] Bazzazzadeh R,Valinassab T.Kinetics and equilibrium studies on biosorption of hexavalent chromium from leather tanning wastewater by Sargassum tenerrimum from Chabahar-Bay Iran.Algal Res2020;48:101896

[113] Al-Homaidan AA,Al-Ghanayem AA,Ibraheem IBM.Potential use of green algae as a biosorbent for hexavalent chromium removal from aqueous solutions.Saudi J Biol Sci2018;25:1733-8 PMCID:PMC6303174

[114] Pouya MR.Adsorption behavior of copper ions on alga Jania adhaerens through SEM and FTIR analyses.Sep Sci Technoly2017;52:2062-8

[115] Salman M,Tang KHD.Removal of cresol red by adsorption using wastepaper.Ind Domest Waste Manag2022;2:1-8

[116] Lee KK.Agaricales (Gilled Mushrooms) as biosorbents of synthetic dye.Mal J Med Health Sci2020;16:10-7Available from: https://medic.upm.edu.my/upload/dokumen/2020112512045902_2020_0295.pdf. [Last accessed on 16 Dec 2024]

[117] Silva B,Rosca M.Waste-based biosorbents as cost-effective alternatives to commercial adsorbents for the retention of fluoxetine from water.Sep Purif Technol2020;235:116139

[118] Food and Agriculture Organization of the United Nations. Statistics Division (ESS). Available from: https://www.fao.org/about/who-we-are/departments/statistics-division. [Last accessed on 16 Dec 2024]

[119] Devi B,Rabha S,Sarma HP.Efficacious sorption capacities for Pb(II) from contaminated water: a comparative study using biowaste and its activated carbon as potential adsorbents.ACS Omega2023;8:15141-51 PMCID:PMC10157841

[120] Kaetzl K,Gehring T.Efficient low-cost anaerobic treatment of wastewater using biochar and woodchip filters.Water2018;10:818

[121] Taherymoosavi S,Munroe P.Characterization of organic compounds in a mixed feedstock biochar generated from Australian agricultural residues.J Anal Appl Pyrolysis2016;120:441-9

[122] Alhashimi HA.Life cycle environmental and economic performance of biochar compared with activated carbon: a meta-analysis.Resour Conserv Recy2017;118:13-26

[123] Verma L.Removal of As(III) and As(V) from aqueous solution using engineered biochar: batch and fixed-bed column study.Int J Environ Sci Technol2023;20:1961-80

[124] Chen J,Tang X,Zhou L.Use of biochar/persulfate for accelerating the stabilization process and improving nitrogen stability of animal waste digestate.Sci Total Environ2021;757:144158

[125] Wiśniowska E,Kokot P.10 - Sludge legislation-comparison between different countries. In: Industrial and municipal sludge, prasad. Butterworth-Heinemann: 2019. pp. 201-24.

[126] Thompson KA,Kearns JP,Summers RS.Environmental comparison of biochar and activated carbon for tertiary wastewater treatment.Environ Sci Technol2016;50:11253-62