{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,24]],"date-time":"2026-01-24T10:00:59Z","timestamp":1769248859980,"version":"3.49.0"},"reference-count":72,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2023,1,6]],"date-time":"2023-01-06T00:00:00Z","timestamp":1672963200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Processes"],"abstract":"<jats:p>Due to the adverse effects of hexavalent chromium (Cr6+) on human health and the quality of the environment, the scientific community has invested a lot of effort to solve this pollution problem. Thus, implementing sustainable alternatives for Cr6+ elimination by exploiting the capacity of microbial biomass to retain heavy metals by biosorption is considered an economic and eco-friendly solution, compared to the conventional physico-chemical processes. However, the ability of microorganisms to remove Cr6+ from liquid effluents can strongly be affected by biotic and abiotic factors. With these issues in mind, the main purpose of this paper was to investigate Cr6+ biosorption on Bacillus megaterium and Rhodotorula sp. biomass inactivated by thermal treatments, exploring the effects of some factors such as: pH, biosorbent dose, initial concentration of the metal in solution, temperature and contact time between the biosorbent and the metal ions on process effectiveness. The results showed that Cr6+ removal by biosorption on the selected microorganisms was strongly influenced by the pH of the solution which contains chromium, the reduction being the principal mechanism involved in hexavalent chromium biosorption. Equilibrium and kinetic studies were also performed, together with SEM-EDX and FTIR spectra, to explain the mechanisms of the biosorption process on the selected biomasses. Maximum uptake capacities of 34.80 mg\/g biosorbent and 47.70 mg\/g biosorbent were achieved by Bacillus megaterium and Rhodotorula sp., respectively, at pH 1, biosorbent dosage of 8 g\/L, 25 \u00b0C, after a contact time of 48 h and an initial Cr6+ concentration in solution of 402.52 mg\/L. The experimental results showed that Cr6+ biosorption by selected microorganisms followed the Elovich model, the values of the correlation coefficients being 0.9868 and 0.9887, respectively. The Freundlich isotherm model best describes the Cr6+ biosorption by Bacillus megaterium and Rhodotorula sp., indicating that a multilayer biosorption mainly controls the process and is conducted on heterogeneous surfaces with uniformly distributed energy.<\/jats:p>","DOI":"10.3390\/pr11010179","type":"journal-article","created":{"date-parts":[[2023,1,9]],"date-time":"2023-01-09T02:31:30Z","timestamp":1673231490000},"page":"179","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["Biosorption of Hexavalent Chromium by Bacillus megaterium and Rhodotorula sp. Inactivated Biomass"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1405-0848","authenticated-orcid":false,"given":"Mihaela","family":"Ro\u0219ca","sequence":"first","affiliation":[{"name":"Department of Environmental Engineering and Management, \u201cCristofor Simionescu\u201d Faculty of Chemical Engineering and Environmental Protection, \u201cGheorghe Asachi\u201d Technical University of Iasi, 73 Prof. D. Mangeron Blvd., 700050 Iasi, Romania"},{"name":"Department of Horticultural Technologies, Faculty of Horticulture, \u201cIon Ionescu de la Brad\u201d Iasi University of Life Sciences, 3 Mihail Sadoveanu Alley, 700490 Iasi, Romania"}]},{"given":"Bruna","family":"Silva","sequence":"additional","affiliation":[{"name":"Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0549-5607","authenticated-orcid":false,"given":"Teresa","family":"Tavares","sequence":"additional","affiliation":[{"name":"Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0663-0316","authenticated-orcid":false,"given":"Maria","family":"Gavrilescu","sequence":"additional","affiliation":[{"name":"Department of Environmental Engineering and Management, \u201cCristofor Simionescu\u201d Faculty of Chemical Engineering and Environmental Protection, \u201cGheorghe Asachi\u201d Technical University of Iasi, 73 Prof. D. Mangeron Blvd., 700050 Iasi, Romania"},{"name":"Academy of Romanian Scientists, 3 Ilfov Street, 050044 Bucharest, Romania"}]}],"member":"1968","published-online":{"date-parts":[[2023,1,6]]},"reference":[{"key":"ref_1","unstructured":"European Environment Agency (2020, December 11). The European Pollutant Release and Transfer Register (E-PRTR), Member States Reporting under Article 7 of Regulation (EC) No 166\/2006\u2014European Environment Agency, Available online: https:\/\/www.eea.europa.eu\/data-and-maps\/data\/member-states-reporting-art-7-under-the-european-pollutant-release-and-transfer-register-e-prtr-regulation-10."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1","DOI":"10.3184\/095422910X12632119406391","article-title":"The Speciation and Physico-Chemical Forms of Metals in Surface Waters and Sediments","volume":"22","author":"Rabajczyk","year":"2010","journal-title":"Chem. Speciat. Bioavailab."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1999","DOI":"10.30638\/eemj.2021.186","article-title":"Mapping of Selected Trace Metals and Associated Risk in Coastal Sediments along the Northwest Anatolia Coasts of Turkey","volume":"20","author":"Ozturk","year":"2021","journal-title":"Environ. Eng. Manag. J."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1621","DOI":"10.30638\/eemj.2018.161","article-title":"Removal of Hexavalent Chromium Using Two Innovative Adsorbents","volume":"17","author":"Abubeah","year":"2018","journal-title":"Environ. Eng. Manag. J."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Diaconu, M., Rosca, M., Cozma, P., Minut, M., Smaranda, C., Hlihor, R.-M., and Gavrilescu, M. (2020, January 29\u201330). Toxicity and Microbial Bioremediation of Chromium Contaminated Effluents. Proceedings of the 2020 International Conference on E-Health and Bioengineering (EHB), Iasi, Romania.","DOI":"10.1109\/EHB50910.2020.9280160"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Lang\u00e5rd, S., and Costa, M. (2015). Chromium. Handbook on the Toxicology of Metals, Elsevier.","DOI":"10.1016\/B978-0-444-59453-2.00033-0"},{"key":"ref_7","unstructured":"WHO Chromium (2000). Air Quality Guidelines, WHO Regional Office for Europe."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"561","DOI":"10.1016\/j.ultramic.2006.02.005","article-title":"Determination of Chromium Valence over the Range Cr(0)\u2013Cr(VI) by Electron Energy Loss Spectroscopy","volume":"106","author":"Daulton","year":"2006","journal-title":"Ultramicroscopy"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1782","DOI":"10.1080\/00958972.2011.583646","article-title":"Sources and Toxicity of Hexavalent Chromium","volume":"64","author":"Saha","year":"2011","journal-title":"J. Coord. Chem."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Luch, A. (2012). Heavy Metal Toxicity and the Environment. Molecular, Clinical and Environmental Toxicology: Volume 3: Environmental Toxicology, Springer. Experientia Supplementum.","DOI":"10.1007\/978-3-7643-8340-4"},{"key":"ref_11","first-page":"13","article-title":"Cr (VI) Removal from Electroplating Industrial Effluents: A Greener and Cheaper Method","volume":"50","author":"Daniel","year":"2009","journal-title":"Za\u0161tita Mater."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"172","DOI":"10.1016\/j.gee.2016.08.002","article-title":"Biosorption of Chromium from Electroplating and Galvanizing Industrial Effluents under Extreme Conditions Using Chlorella Vulgaris","volume":"1","author":"Sibi","year":"2016","journal-title":"Green Energy Environ."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"146","DOI":"10.1061\/(ASCE)HZ.2153-5515.0000170","article-title":"Removal of Chromium from Electroplating Industry Effluent Using Electrocoagulation","volume":"17","author":"Verma","year":"2013","journal-title":"J. Hazard. Toxic Radioact. Waste"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"321","DOI":"10.1080\/01496395.2018.1563157","article-title":"Removal of Chromium (VI) and Lead from Electroplating Effluent Using Electrocoagulation","volume":"55","author":"Sharma","year":"2020","journal-title":"Sep. Sci. Technol."},{"key":"ref_15","unstructured":"Abdulla, H.M., Kamal, E.M., Mohamed, A.H., and El-Bassuony, A.D. (2010, January 12\u201316). Chromium Removal from Tannery Wastewater Using Chemical and Biological Techniques Aiming Zero Discharge of Pollution. In Proceeding of Fifth Scientific Environmental Conference, Houston, TX, USA."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"8891","DOI":"10.1021\/ie060978q","article-title":"Chromium Removal and Sorption Mechanism from Aqueous Solutions by Wine Processing Waste Sludge","volume":"45","author":"Liu","year":"2006","journal-title":"Ind. Eng. Chem. Res."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"289","DOI":"10.1007\/978-981-13-8844-6_14","article-title":"Bioremediation of Persistent Toxic Substances: From Conventional to New Approaches in Using Microorganisms and Plants","volume":"Volume 17","author":"Arora","year":"2019","journal-title":"Microbial Technology for the Welfare of Society"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"219","DOI":"10.1002\/elsc.200420026","article-title":"Removal of Heavy Metals from the Environment by Biosorption","volume":"4","author":"Gavrilescu","year":"2004","journal-title":"Eng. Life Sci."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"995","DOI":"10.30638\/eemj.2021.092","article-title":"Removal Efficiency of Heavy Metals by a Biological Wastewater Treatment Plant and Their Potential Risks to Human Health","volume":"8","author":"Hammoudani","year":"2021","journal-title":"Environ. Eng. Manag. J."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Bulgariu, L., and Gavrilescu, M. (2015). Bioremediation of Heavy Metals by Microalgae. Handbook of Marine Microalgae, Elsevier.","DOI":"10.1016\/B978-0-12-800776-1.00030-3"},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"El-Gendy, N.S. (2022). Removal of Heavy Metals from the Environment by Phytoremediation and Microbial Remediation. Sustainable Solutions for Environmental Pollution, Wiley.","DOI":"10.1002\/9781119827665"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Filote, C., Ro\u0219ca, M., Hlihor, R.M., Cozma, P., Simion, I.M., Apostol, M., and Gavrilescu, M. (2021). Sustainable Application of Biosorption and Bioaccumulation of Persistent Pollutants in Wastewater Treatment: Current Practice. Processes, 9.","DOI":"10.3390\/pr9101696"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"127735","DOI":"10.1016\/j.colsurfa.2021.127735","article-title":"Influence of Saccharomyces Cerevisiae Yeast Cells Immobilized on Cocos Nucifera Fibers for the Adsorption of Pb(II) Ions","volume":"632","author":"Chwastowski","year":"2022","journal-title":"Colloids Surf. A Physicochem. Eng. Asp."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"637","DOI":"10.30638\/eemj.2022.059","article-title":"Investigation of Cobalt(II) Adsorption from Aqueous","volume":"21","author":"Uysal","year":"2022","journal-title":"Environ. Eng. Manag. J."},{"key":"ref_25","first-page":"1386","article-title":"A Review Study of Biosorption of Heavy Metals and Comparison between Different Biosorbents","volume":"6","author":"Abdi","year":"2015","journal-title":"J. Mater. Environ. Sci."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Kim, S.-K. (2015). Marine Algae Biomass for Removal of Heavy Metal Ions. Hb25_Springer Handbook of Marine Biotechnology, Springer.","DOI":"10.1007\/978-3-642-53971-8"},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Derco, J., and Vrana, B. (2018). Biosorption of Heavy Metals. Biosorption, InTech.","DOI":"10.5772\/intechopen.68261"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Filote, C., Ro\u0219ca, M., Simion, I.M., and Hlihor, R.M. (2022). Continuous Systems Bioremediation of Wastewaters Loaded with Heavy Metals Using Microorganisms. Processes, 10.","DOI":"10.3390\/pr10091758"},{"key":"ref_29","first-page":"581","article-title":"Bioremediation of Cr(VI) Polluted Wastewaters by Sorption on Heat Inactivated Saccharomyces Cerevisiae Biomass","volume":"7","author":"Hlihor","year":"2013","journal-title":"Int. J. Environ. Res."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"358","DOI":"10.1016\/j.nbt.2014.08.003","article-title":"Experimental Analysis and Mathematical Prediction of Cd(II) Removal by Biosorption Using Support Vector Machines and Genetic Algorithms","volume":"32","author":"Hlihor","year":"2015","journal-title":"New Biotechnol."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"175","DOI":"10.3184\/095422911X13103800616341","article-title":"Adsorption Behaviour of Cadmium by Bacillus Cereus M 116: Some Physical and Biochemical Studies","volume":"23","author":"Ganguly","year":"2011","journal-title":"Chem. Speciat. Bioavailab."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"613","DOI":"10.1007\/s10534-008-9147-6","article-title":"Responses of Rhodotorula sp. Y11 to Cadmium","volume":"21","author":"Li","year":"2008","journal-title":"Biometals"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"778","DOI":"10.3389\/fpls.2017.00778","article-title":"Tolerance and Reduction of Chromium(VI) by Bacillus sp. MNU16 Isolated from Contaminated Coal Mining Soil","volume":"8","author":"Upadhyay","year":"2017","journal-title":"Front. Plant Sci."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"74","DOI":"10.1515\/gps-2016-0218","article-title":"Comparison of Rhodotorula sp. and Bacillus megaterium in the Removal of Cadmium Ions from Liquid Effluents","volume":"7","author":"Hlihor","year":"2018","journal-title":"Green Process. Synth."},{"key":"ref_35","unstructured":"US EPA (2022, August 15). SW-846 Test Method 7196A: Chromium, Hexavalent (Colorimetric), Available online: https:\/\/www.epa.gov\/hw-sw846\/sw-846-test-method-7196a-chromium-hexavalent-colorimetric."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Edebali, S. (2019). Modelling of Adsorption Kinetic Processes\u2014Errors, Theory and Application. Advanced Sorption Process Applications, IntechOpen.","DOI":"10.5772\/intechopen.75857"},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Netzahuatl-Mu\u00f1oz, A.R., del Carmen Cristiani-Urbina, M., and Cristiani-Urbina, E. (2015). Chromium Biosorption from Cr(VI) Aqueous Solutions by Cupressus lusitanica Bark: Kinetics, Equilibrium and Thermodynamic Studies. PLoS ONE, 10.","DOI":"10.1371\/journal.pone.0137086"},{"key":"ref_38","doi-asserted-by":"crossref","unstructured":"An, B. (2020). Cu(II) and As(V) Adsorption Kinetic Characteristic of the Multifunctional Amino Groups in Chitosan. Processes, 8.","DOI":"10.3390\/pr8091194"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"398","DOI":"10.1016\/j.jece.2014.01.014","article-title":"Relevance of Isotherm Models in Biosorption of Pollutants by Agricultural Byproducts","volume":"2","author":"Rangabhashiyam","year":"2014","journal-title":"J. Environ. Chem. Eng."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"787","DOI":"10.1007\/s11814-015-0053-7","article-title":"Monolayer and Multilayer Adsorption Isotherm Models for Sorption from Aqueous Media","volume":"32","author":"Saadi","year":"2015","journal-title":"Korean J. Chem. Eng."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"3039817","DOI":"10.1155\/2017\/3039817","article-title":"Modelling and Interpretation of Adsorption Isotherms","volume":"2017","author":"Ayawei","year":"2017","journal-title":"J. Chem."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"571","DOI":"10.1260\/0263-6174.32.7.571","article-title":"Adsorption Energy and Pore-Size Distributions of Activated Carbons Calculated Using Hill\u2019s Model","volume":"32","author":"Torkia","year":"2014","journal-title":"Adsorpt. Sci. Technol."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1016\/0021-9797(73)90350-0","article-title":"Jovanovich Adsorption Isotherm for Heterogeneous Surfaces","volume":"43","author":"Misra","year":"1973","journal-title":"J. Colloid Interface Sci."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"1014","DOI":"10.1016\/0095-8522(65)90071-1","article-title":"A Model for Diffusion in a Glassy Polymer","volume":"20","author":"Vieth","year":"1965","journal-title":"J. Colloid Sci."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"95","DOI":"10.1016\/j.jcis.2006.01.055","article-title":"Using the Dual-Mode Model to Describe Adsorption of Organic Pollutants onto an Organoclay","volume":"299","author":"Gonen","year":"2006","journal-title":"J. Colloid Interface Sci."},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Aranda-Garc\u00eda, E., and Cristiani-Urbina, E. (2020). Hexavalent Chromium Removal and Total Chromium Biosorption from Aqueous Solution by Quercus Crassipes Acorn Shell in a Continuous Up-Flow Fixed-Bed Column: Influencing Parameters, Kinetics, and Mechanism. PLoS ONE, 15.","DOI":"10.1371\/journal.pone.0227953"},{"key":"ref_47","doi-asserted-by":"crossref","unstructured":"Jobby, R., Jha, P., Gupta, A., Gupte, A., and Desai, N. (2019). Biotransformation of Chromium by Root Nodule Bacteria Sinorhizobium sp. SAR1. PLoS ONE, 14.","DOI":"10.1371\/journal.pone.0219387"},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"44","DOI":"10.1016\/j.psep.2016.06.016","article-title":"Biosorption Potential of Dead and Living Arthrobacter Viscosus Biomass in the Removal of Cr(VI): Batch and Column Studies","volume":"108","author":"Hlihor","year":"2017","journal-title":"Process Saf. Environ. Prot."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"e01450","DOI":"10.1016\/j.heliyon.2019.e01450","article-title":"Biosorption of Hexavalent Chromium by Pleurotus Ostreatus","volume":"5","author":"Vendruscolo","year":"2019","journal-title":"Heliyon"},{"key":"ref_50","first-page":"670249","article-title":"Biosorption of Hexavalent Chromium from Aqueous Medium with Opuntia Biomass","volume":"2014","author":"Angosto","year":"2014","journal-title":"Sci. World J."},{"key":"ref_51","first-page":"1","article-title":"Biosorption of Hexavalent Chromium by Pseudomonas Aeruginosa Strain ANSC: Equilibria Isothermic, Kinetic and Thermodynamic Studies","volume":"6","author":"Ojiagu","year":"2018","journal-title":"Bioeng. Biosci."},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"427","DOI":"10.1016\/S0045-6535(02)00089-9","article-title":"Chromium (VI) Biosorption and Bioaccumulation by Chromate Resistant Bacteria","volume":"48","author":"Srinath","year":"2002","journal-title":"Chemosphere"},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"15928","DOI":"10.1038\/s41598-020-72996-3","article-title":"Mechanistic Understanding of the Adsorption and Thermodynamic Aspects of Cationic Methylene Blue Dye onto Cellulosic Olive Stones Biomass from Wastewater","volume":"10","year":"2020","journal-title":"Sci. Rep."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1016\/S0304-386X(03)00155-5","article-title":"Biosorption Process Simulation Tools","volume":"71","author":"Volesky","year":"2003","journal-title":"Hydrometallurgy"},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"111699","DOI":"10.1016\/j.ecoenv.2020.111699","article-title":"Study on Detoxification and Removal Mechanisms of Hexavalent Chromium by Microorganisms","volume":"208","author":"Tang","year":"2021","journal-title":"Ecotoxicol. Environ. Saf."},{"key":"ref_56","doi-asserted-by":"crossref","unstructured":"Kotrba, P., Mackova, M., and Macek, T. (2011). Equilibrium, Kinetic and Dynamic Modelling of Biosorption Processes. Microbial Biosorption of Metals, Springer.","DOI":"10.1007\/978-94-007-0443-5"},{"key":"ref_57","doi-asserted-by":"crossref","unstructured":"Rosca, M., Hlihor, R.M., Cozma, P., Simion, I.M., Filote, C., Grecu, C., Stoleru, V., and Gavrilescu, M. (2021, January 18\u201319). Scaling-Up Strategies of Heavy Metals Microbial Bioremediation. Proceedings of the 2021 International Conference on e-Health and Bioengineering (EHB), Iasi, Romania.","DOI":"10.1109\/EHB52898.2021.9657641"},{"key":"ref_58","doi-asserted-by":"crossref","first-page":"757","DOI":"10.30638\/eemj.2022.070","article-title":"Investigation of Copper(II), Zinc(II) and Lead(II) Removal onto Expanded Perlite by Adsorption from the Wastes of Metal Casting Industry: Statistical Modeling and Optimization","volume":"21","author":"Temel","year":"2022","journal-title":"Environ. Eng. Manag. J."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"397","DOI":"10.1007\/s12517-013-1114-z","article-title":"Comparison of Linear and Nonlinear Forms of Isotherm Models for Zn(II) and Cu(II) Sorption on a Kaolinite","volume":"8","author":"Babazadeh","year":"2015","journal-title":"Arab J Geosci"},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"741","DOI":"10.1023\/A:1010694910170","article-title":"Comparison of Linear and Nonlinear Forms of Isotherm Models for Strontium Sorption on a Sodium Bentonite","volume":"243","author":"Tsai","year":"2000","journal-title":"J. Radioanal. Nucl. Chem."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"517631","DOI":"10.1155\/2013\/517631","article-title":"Linear and Nonlinear Regression Methods for Equilibrium Modelling of p -Nitrophenol Biosorption by Rhizopus Oryzae: Comparison of Error Analysis Criteria","volume":"2013","author":"Yaneva","year":"2013","journal-title":"J. Chem."},{"key":"ref_62","doi-asserted-by":"crossref","unstructured":"Rosca, M., Diaconu, M., Hlihor, R.-M., Cozma, P., and Gavrilescu, M. (2020, January 29\u201330). Prediction of Equillibrium Sorption Isotherm for Cadmium Biosorption by Microorganisms: Comparison of Linear and Nonlinear Methods. Proceedings of the 2020 International Conference on e-Health and Bioengineering (EHB), Iasi, Romania.","DOI":"10.1109\/EHB50910.2020.9280180"},{"key":"ref_63","doi-asserted-by":"crossref","first-page":"7694157","DOI":"10.1155\/2021\/7694157","article-title":"Bioremediation of Chromium by Microorganisms and Its Mechanisms Related to Functional Groups","volume":"2021","author":"Ayele","year":"2021","journal-title":"J. Chem."},{"key":"ref_64","doi-asserted-by":"crossref","first-page":"619766","DOI":"10.3389\/fmicb.2020.619766","article-title":"Chemical-Assisted Microbially Mediated Chromium (Cr) (VI) Reduction Under the Influence of Various Electron Donors, Redox Mediators, and Other Additives: An Outlook on Enhanced Cr(VI) Removal","volume":"11","author":"Rahman","year":"2021","journal-title":"Front. Microbiol."},{"key":"ref_65","doi-asserted-by":"crossref","unstructured":"Hossan, S., Hossain, S., Islam, M.R., Kabir, M.H., Ali, S., Islam, M.S., Imran, K.M., Moniruzzaman, M., Mou, T.J., and Parvez, A.K. (2020). Bioremediation of Hexavalent Chromium by Chromium Resistant Bacteria Reduces Phytotoxicity. Int. J. Environ. Res. Public Health, 17.","DOI":"10.3390\/ijerph17176013"},{"key":"ref_66","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1016\/j.ecoleng.2016.11.057","article-title":"Mechanism of Adsorption of Cu2+ and Zn2+ on the Corn Silk (Zea mays L.)","volume":"99","year":"2017","journal-title":"Ecol. Eng."},{"key":"ref_67","doi-asserted-by":"crossref","unstructured":"Simi\u0107, M., Petrovi\u0107, J., \u0160o\u0161tari\u0107, T., Ercegovi\u0107, M., Milojkovi\u0107, J., Lopi\u010di\u0107, Z., and Koji\u0107, M. (2022). A Mechanism Assessment and Differences of Cadmium Adsorption on Raw and Alkali-Modified Agricultural Waste. Processes, 10.","DOI":"10.3390\/pr10101957"},{"key":"ref_68","doi-asserted-by":"crossref","first-page":"407","DOI":"10.1016\/j.jtice.2015.06.025","article-title":"Removal of Pb2+ Ions by Raw Corn Silk (Zea mays L.) as a Novel Biosorbent","volume":"58","year":"2016","journal-title":"J. Taiwan Inst. Chem. Eng."},{"key":"ref_69","doi-asserted-by":"crossref","first-page":"617","DOI":"10.1016\/j.jclepro.2018.10.288","article-title":"Biosorption for Removal of Hexavalent Chromium Using Microalgae Scenedesmus sp.","volume":"209","author":"Pradhan","year":"2019","journal-title":"J. Clean. Prod."},{"key":"ref_70","doi-asserted-by":"crossref","first-page":"456","DOI":"10.1080\/05704928.2016.1230863","article-title":"Advances in Fourier Transform Infrared (FTIR) Spectroscopy of Biological Tissues","volume":"52","author":"Talari","year":"2017","journal-title":"Appl. Spectrosc. Rev."},{"key":"ref_71","first-page":"3817","article-title":"Fourier Transform Infrared (FTIR) Spectroscopy for Identification of Chlorella vulgaris Beijerinck 1890 and Scenedesmus obliquus (Turpin) K\u00fctzing 1833","volume":"11","author":"Duygu","year":"2012","journal-title":"Afr. J. Biotechnol."},{"key":"ref_72","doi-asserted-by":"crossref","first-page":"78292","DOI":"10.1007\/s11356-022-21323-6","article-title":"Hexavalent Chromium Reduction and Bioremediation Potential of Fusarium Proliferatum S4 Isolated from Chromium-Contaminated Soil","volume":"29","author":"Shan","year":"2022","journal-title":"Environ. Sci. Pollut. 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