Abstract
Bioremediation is a promising method for removing heavy metals in contaminated effluents. Using several microorganisms, the process can provide efficient treatment, resulting in reduced waste generation, all while promoting sustainability. The current work evaluated the potential of the novel assembly by Rhodospirillum rubrum and Rhodobacter capsulatus to remove hexavalent chromium, total chromium, cadmium, and lead. In addition, photosynthetic pigment (bacteriochlorophyll-a and carotenoids) production and biomass increment were verified. A composite central design (CCD) was proposed to obtain models describing the behavior of the initial concentration of chromium, cadmium, and lead (independent variables). In the experiments described at the central point by the CCD, the co-culture (R. capsulatus: R. rubrum) was inoculated in 500 mL Erlenmeyer flasks containing an effluent consisting of RCV medium with heavy metals (20 mg/L Cr6+, 10 mg/L Cd2+ and 10 mg/L Pb2+). With a light intensity of 5760 lx and a biological cycle of 216 h, the maximum removals were 83% for total chromium, 30% for cadmium, and 80% for lead. Under these conditions, the biomass increased by 68% compared to the initial value (1.0 g/L), even in a highly toxic effluent.
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References
Abarikwu SO, Essien EB, Iyede O-O, John K, Mgbudom-Okah C (2017) Biomarkers of oxidative stress and health risk assessment of heavy metal contaminated aquatic and terrestrial organisms by oil extraction industry in Ogale, Nigeria. Chemosphere 185:412–422. https://doi.org/10.1016/j.chemosphere.2017.07.024
Agency for Toxic Substances and Disease Registry (ATSDR) (2012) Toxicological Profile for Cadmium. Atlanta, GA
Agency for Toxic Substances and Disease Registry (ATSDR) (2020) Toxicological Profile for Lead. Atlanta, GA
Alemu T, Mekonnen A, Leta S (2019) Integrated tannery wastewater treatment for effluent reuse for irrigation: encouraging water efficiency and sustainable development in developing countries. J Water Process Eng 30:100514. https://doi.org/10.1016/j.jwpe.2017.10.014
Algburi A, Asghar A, Huang Q, Mustfa W, Javed HU, Zehm S, Chikindas ML (2021) Black cardamom essential oil prevents Escherichia coli O157: H7 and Salmonella Typhimurium JSG 1748 biofilm formation through inhibition of quorum sensing. J Food Sci Technol 58:3183–3191. https://doi.org/10.1007/s13197-020-04821-8
Al-Homaidan AA, Al-Houri HJ, Al-Hazzani AA, Elgaaly G, Moubayed NMS (2014) Biosorption of copper ions from aqueous solutions by Spirulina platensis biomass. Arab J Chem 7:57–62. https://doi.org/10.1016/j.arabjc.2013.05.022
Antony GS, Manna A, Baskaran S, Puhazhendi P, Ramchary A, Niraikulam A, Ramudu KN (2020) Non-enzymatic reduction of Cr (VI) and it’s effective biosorption using heat-inactivated biomass: a fermentation waste material. J Hazard Mater 392:122257. https://doi.org/10.1016/j.jhazmat.2020.122257
Bharagava RN, Mishra S (2018) Hexavalent chromium reduction potential of Cellulosimicrobium sp. isolated from common effluent treatment plant of tannery industries. Ecotoxicol Environ Saf 147:102–109. https://doi.org/10.1016/j.ecoenv.2017.08.040
Bhardwaj A, Kumar S, Singh D (2023) Tannery effluent treatment and its environmental impact: a review of current practices and emerging technologies. Water Qual Res J 58:128–152. https://doi.org/10.2166/wqrj.2023.002
Bhateria R, Dhaka R (2019) Optimization and statistical modelling of cadmium biosorption process in aqueous medium by Aspergillus niger using response surface methodology and principal component analysis. Ecol Eng 135:127–138. https://doi.org/10.1016/j.ecoleng.2019.05.010
Blanco A, Pignata ML, Lascano HR, Salazar MJ, Rodriguez JH (2021) Lead uptake and translocation pathways in soybean seedlings: the role of ion competition and transpiration rates. Environ Sci Pollut Res Int 28:20624–20636. https://doi.org/10.1007/s11356-020-11901-x
Briffa J, Sinagra E, Blundell R (2020) Heavy metal pollution in the environment and their toxicological effects on humans. Heliyon 6:e04691. https://doi.org/10.1016/j.heliyon.2020.e04691
Cai Y, Li C, Wu D, Wang W, Tan F, Wang X, Wong PK, Qiao X (2017) Highly active MgO nanoparticles for simultaneous bacterial inactivation and heavy metal removal from aqueous solution. Chem Eng J 312:158–166. https://doi.org/10.1016/j.cej.2016.11.134
Chandrangsu P, Rensing C, Helmann JD (2017) Metal homeostasis and resistance in bacteria. Nat Rev Microbiol 15:338–350. https://doi.org/10.1038/nrmicro.2017.15
Chen J, Wei J, Ma C, Yang Z, Li Z, Yang X, Wang M, Zhang H, Hu J, Zhang C (2020) Photosynthetic bacteria-based technology is a potential alternative to meet sustainable wastewater treatment requirement? Environ Int 137:105417. https://doi.org/10.1016/j.envint.2019.105417
Chen W, Li W, Wang T, Wen Y, Shi W, Zhang W, Guo B, Yang Y (2022) Isolation of functional bacterial strains from chromium-contaminated site and bioremediation potentials. J Environ Manage 307:114557. https://doi.org/10.1016/j.jenvman.2022.114557
Choińska-Pulit A, Sobolczyk-Bednarek J, Łaba W (2018) Optimization of copper, lead and cadmium biosorption onto newly isolated bacterium using a box-behnken design. Ecotoxicol Environ Saf 149:275–283. https://doi.org/10.1016/j.ecoenv.2017.12.008
Chowdhury M, Mostafa MG, Biswas TK, Saha AK (2013) Treatment of leather industrial effluents by filtration and coagulation processes. Water Resour Ind 3:11–22. https://doi.org/10.1016/j.wri.2013.05.002
Das S, Mishra J, Das SK, Pandey S, Rao DS, Chakraborty A, Sudarshan M, Das N, Thatoi H (2014) Investigation on mechanism of Cr(VI) reduction and removal by Bacillus amyloliquefaciens, a novel chromate tolerant bacterium isolated from chromite mine soil. Chemosphere 96:112–121. https://doi.org/10.1016/j.chemosphere.2013.08.080
Dasharathy S, Arjunan S, Maliyur Basavaraju A, Murugasen V, Ramachandran S, Keshav R, Murugan R (2022) Mutagenic, carcinogenic, and teratogenic effect of heavy metals. Evidence-Based Complement Altern Med 2022:8011953. https://doi.org/10.1155/2022/8011953
de Figueira EM, Gusmão Lima AI, Pereira SIA (2005) Cadmium tolerance plasticity in Rhizobium leguminosarum bv. viciae: glutathione as a detoxifying agent. Can J Microbiol 51:7–14. https://doi.org/10.1139/w04-101
Elahi A, Rehman A (2019) Multiple metal resistance and Cr6+ reduction by bacterium, Staphylococcus sciuri A-HS1, isolated from untreated tannery effluent. J King Saud Univ Sci 31:1005–1013. https://doi.org/10.1016/j.jksus.2018.07.016
Elahi A, Ajaz M, Rehman A, Vuilleumier S, Khan Z, Hussain SZ (2019) Isolation, characterization, and multiple heavy metal-resistant and hexavalent chromium-reducing Microbacterium testaceum B-HS2 from tannery effluent. J King Saud Univ Sci 31:1437–1444. https://doi.org/10.1016/j.jksus.2019.02.007
El-Sheikh AH, Alshamaly HS (2020) Cadmium removal from organic acid-bearing soil-washing water by magnetic biosorption: effect of various factors and adsorption isothermal study. J Environ Chem Eng 8:104188. https://doi.org/10.1016/j.jece.2020.104188
Fathollahi A, Khasteganan N, Coupe SJ, Newman AP (2021) A meta-analysis of metal biosorption by suspended bacteria from three phyla. Chemosphere 268:129290. https://doi.org/10.1016/j.chemosphere.2020.129290
Ferreira ML, Gerbino E, Cavallero GJ et al (2020) Infrared spectroscopy with multivariate analysis to interrogate the interaction of whole cells and secreted soluble exopolimeric substances of Pseudomonas veronii 2E with Cd(II), Cu(II) and Zn(II). Spectrochim Acta A Mol Biomol Spectrosc 228:117820. https://doi.org/10.1016/j.saa.2019.117820
Ghosh S, Nukavarapu SP, Jala VR (2024) Effects of heavy metals on gut barrier integrity and gut microbiota. Microbiota Host 2:e230015. https://doi.org/10.1530/MAH-23-0015
Hou S, Shu W, Tan S, Zhao L, Yin P (2015) Exploration of the antioxidant system and photosynthetic system of a marine algicidal Bacillus and its effect on four harmful algal bloom species. Can J Microbiol 62:49–59. https://doi.org/10.1139/cjm-2015-0425
Italiano F, Rinalducci S, Agostiano A, Zolla L, De Leo F, Ceci LR, Trotta M (2012) Changes in morphology, cell wall composition and soluble proteome in Rhodobacter sphaeroides cells exposed to chromate. Biometals 25:939–949. https://doi.org/10.1007/s10534-012-9561-7
Jiang Y, Yang F, Dai M, Ali I, Shen X, Hou X, Alhewairini SS, Peng C, Naz I (2022) Application of microbial immobilization technology for remediation of Cr(VI) contamination: a review. Chemosphere 286:131721. https://doi.org/10.1016/j.chemosphere.2021.131721
Karthik C, Barathi S, Pugazhendhi A, Ramkumar VS, Thi NBD, Arulselvi PI (2017) Evaluation of Cr(VI) reduction mechanism and removal by Cellulosimicrobium funkei strain AR8, a novel haloalkaliphilic bacterium. J Hazard Mater 333:42–53. https://doi.org/10.1016/j.jhazmat.2017.03.037
Khan R, Ali S, Mumtaz S, Andleeb S, Ulhaq M, Tahir HM, Khan MKA, Khan MA, Shakir HA (2019) Toxicological effects of toxic metals (cadmium and mercury) on blood and the thyroid gland and pharmacological intervention by vitamin C in rabbits. Environ Sci Pollut Res Int 26:16727–16741. https://doi.org/10.1007/s11356-019-04886-9
Khaneja R, Perez-Fons L, Fakhry S, Baccigalupi L, Steiger S, To E, Sandmann G, Dong TC, Ricca E, Fraser PD, Cutting SM (2010) Carotenoids found in Bacillus. J Appl Microbiol 108:1889–1902. https://doi.org/10.1111/j.1365-2672.2009.04590.x
Krishnani KK, Meng X, Christodoulatos C, Boddu VM (2008) Biosorption mechanism of nine different heavy metals onto biomatrix from rice husk. J Hazard Mater 153:1222–1234. https://doi.org/10.1016/j.jhazmat.2007.09.113
Kumar S, Prasad S, Yadav KK, Shrivastava M, Gupta N, Nagar S, Bach Q-V, Kamyab H, Khan SA, Yadav S, Malav LC (2019) Hazardous heavy metals contamination of vegetables and food chain: role of sustainable remediation approaches - a review. Environ Res 179:108792. https://doi.org/10.1016/j.envres.2019.108792
Li X, Peng W, Jia Y, Lu L, Fan W (2016) Bioremediation of lead contaminated soil with Rhodobacter sphaeroides. Chemosphere 156:228–235. https://doi.org/10.1016/j.chemosphere.2016.04.098
Limcharoensuk T, Sooksawat N, Sumarnrote A, Awutpet T, Kruatrachue M, Pokethitiyook P, Auesukaree C (2015) Bioaccumulation and biosorption of Cd2+ and Zn2+ by bacteria isolated from a zinc mine in Thailand. Ecotoxicol Environ Saf 122:322–330. https://doi.org/10.1016/j.ecoenv.2015.08.013
Lyu H, Gong Y, Tang J et al (2016) Immobilization of heavy metals in electroplating sludge by biochar and iron sulfide. Environ Sci Pollut Res Int 23:14472–14488. https://doi.org/10.1007/s11356-016-6621-5
Mahapatra B, Dhal NK, Pradhan A, Panda BP (2020) Application of bacterial extracellular polymeric substances for detoxification of heavy metals from contaminated environment: a mini-review. Mater Today Proc 30:283–288. https://doi.org/10.1016/j.matpr.2020.01.490
Michalak I, Chojnacka K, Witek-Krowiak A (2013) State of the art for the biosorption process—a review. Appl Biochem Biotechnol 170:1389–1416. https://doi.org/10.1007/s12010-013-0269-0
Mohan D, Pittman CU (2006) Activated carbons and low cost adsorbents for remediation of tri- and hexavalent chromium from water. J Hazard Mater 137:762–811. https://doi.org/10.1016/j.jhazmat.2006.06.060
Moradi M, Moussavi G (2019) Enhanced treatment of tannery wastewater using the electrocoagulation process combined with UVC/VUV photoreactor: parametric and mechanistic evaluation. Chem Eng J 358:1038–1046. https://doi.org/10.1016/j.cej.2018.10.069
More TT, Yadav JSS, Yan S, Tyagi RD, Surampalli RY (2014) Extracellular polymeric substances of bacteria and their potential environmental applications. J Environ Manage 144:1–25. https://doi.org/10.1016/j.jenvman.2014.05.010
Najib T, Solgi M, Farazmand A, Heydarian SM, Nasernejad B (2017) Optimization of sulfate removal by sulfate reducing bacteria using response surface methodology and heavy metal removal in a sulfidogenic UASB reactor. J Environ Chem Eng 5:3256–3265. https://doi.org/10.1016/j.jece.2017.06.016
Nies DH (1999) Microbial heavy-metal resistance. Appl Microbiol Biotechnol 51:730–750. https://doi.org/10.1007/s002530051457
Olaniran AO, Balgobind A, Pillay B (2013) Bioavailability of heavy metals in soil: impact on microbial. biodegradation of organic compounds and possible improvement strategies. Int J Mol Sci 14:10197–10228. https://doi.org/10.3390/ijms140510197
Priya AK, Gnanasekaran L, Dutta K et al (2022) Biosorption of heavy metals by microorganisms: evaluation of different underlying mechanisms. Chemosphere 307:135957. https://doi.org/10.1016/j.chemosphere.2022.135957
Pushkar B, Sevak P, Parab S, Nilkanth N (2021) Chromium pollution and its bioremediation mechanisms in bacteria: a review. J Environ Manage 287:112279. https://doi.org/10.1016/j.jenvman.2021.112279
Rajoria S, Vashishtha M, Sangal VK (2022) Treatment of electroplating industry wastewater: a review on the various techniques. Environ Sci Pollut Res Int 29:72196–72246. https://doi.org/10.1007/s11356-022-18643-y
Roy R, Samanta S, Pandit S et al (2024) An overview of bacteria-mediated heavy metal bioremediation strategies. Appl Biochem Biotechnol 196:1712–1751. https://doi.org/10.1007/s12010-023-04614-7
Sakpirom J, Kantachote D, Nunkaew T, Khan E (2017) Characterizations of purple non-sulfur bacteria isolated from paddy fields, and identification of strains with potential for plant growth-promotion, greenhouse gas mitigation and heavy metal bioremediation. Res Microbiol 168:266–275. https://doi.org/10.1016/j.resmic.2016.12.001
Santos GA, Bortoli LD, Santos DA et al (2025) Insights of light spectra on biohydrogen production by photo-fermentation. Int J Hydrogen Energy 149:150088. https://doi.org/10.1016/j.ijhydene.2025.150088
Smiejan A, Wilkinson KJ, Rossier C (2003) Cd bioaccumulation by a freshwater bacterium, Rhodospirillum rubrum. Environ Sci Technol 37:701–706. https://doi.org/10.1021/es025901h
Sousa LdeM, Moreira FS, Cardoso VL, Batista FRX (2023) Light intensity effect on the performance of Rhodobacter capsulatus in removal of chromium from effluent. J Water Process Eng 52:103567. https://doi.org/10.1016/j.jwpe.2023.103567
Sreedevi PR, Suresh K, Jiang G (2022) Bacterial bioremediation of heavy metals in wastewater: a review of processes and applications. J Water Process Eng 48:102884. https://doi.org/10.1016/j.jwpe.2022.102884
Su Y-Q, Zhao Y-J, Wu N, Chen Y-E, Zhang W-J, Qiao D-R, Cao Y (2018) Chromium removal from solution by five photosynthetic bacteria isolates. Appl Microbiol Biotechnol 102:1983–1995. https://doi.org/10.1007/s00253-017-8690-x
Su Y-Q, Zhao Y-J, Zhang W-J, Chen G-C, Qin H, Qiao D-R, Chen Y-E, Cao Y (2020) Removal of mercury(II), lead(II) and cadmium(II) from aqueous solutions using Rhodobacter sphaeroides SC01. Chemosphere 243:125166. https://doi.org/10.1016/j.chemosphere.2019.125166
Su Y-Q, Yuan S, Guo Y-C, Tan Y-Y, Mao H-T, Cao Y, Chen Y-E (2021) Highly efficient and sustainable removal of Cr (VI) in aqueous solutions by photosynthetic bacteria supplemented with phosphor salts. Chemosphere 283:131031. https://doi.org/10.1016/j.chemosphere.2021.131031
Sun Y, Chen A, Pan S-Y et al (2019) Novel chitosan-based flocculants for chromium and nickle removal in wastewater via integrated chelation and flocculation. J Environ Manage 248:109241. https://doi.org/10.1016/j.jenvman.2019.07.012
Tan H, Wang C, Zeng G, Luo Y, Li H, Xu H (2020) Bioreduction and biosorption of Cr(VI) by a novel Bacillus sp. CRB-B1 strain. J Hazard Mater 386:121628. https://doi.org/10.1016/j.jhazmat.2019.121628
Tang X, Huang Y, Li Y et al (2021) Study on detoxification and removal mechanisms of hexavalent chromium by microorganisms. Ecotoxicol Environ Saf 208:111699. https://doi.org/10.1016/j.ecoenv.2020.111699
Tee WT, Loh NYL, Hiew BYZ, Hanson S, Thangalazhy-Gopakumar S, Gan S, Lee LY (2022) Effective remediation of lead(II) wastewater by Parkia speciosa pod biosorption: box-behnken design optimisation and adsorption performance evaluation. Biochem Eng J 187:108629. https://doi.org/10.1016/j.bej.2022.108629
Thatoi H, Das S, Mishra J et al (2014) Bacterial chromate reductase, a potential enzyme for bioremediation of hexavalent chromium: a review. J Environ Manage 146:383–399. https://doi.org/10.1016/j.jenvman.2014.07.014
Tripathi S, Sharma P, Chandra R (2021a) Distillery wastewater detoxification and management through phytoremediation employing Ricinus communis L. Bioresour Technol. https://doi.org/10.1016/j.biortech.2021.125192
Tripathi S, Sharma P, Singh K, Purchase D, Chandra R (2021b) Translocation of heavy metals in medicinally important herbal plants growing on complex organometallic sludge of sugarcane molasses-based distillery waste. Environ Technol Innov 22:101434. https://doi.org/10.1016/j.eti.2021.101434
Tripathi S, Chandra R, Purchase D, Bilal M, Mythili R, Yadav S (2022) Quorum sensing—a promising tool for degradation of industrial waste containing persistent organic pollutants. Environ Pollut 292:118342. https://doi.org/10.1016/j.envpol.2021.118342
Ummalyma SB, Singh A (2021) Chapter 14 - importance of algae and bacteria in the bioremediation of heavy metals from wastewater treatment plants. In: Shah MP, Rodriguez Couto S, Kumar V (eds) New trends in removal of heavy metals from industrial wastewater. Elsevier, Amsterdam, pp 343–357
Upadhyay SK, Singh JS, Singh DP (2011) Exopolysaccharide-producing plant growth-promoting rhizobacteria under salinity condition. Pedosphere 21:214–222. https://doi.org/10.1016/S1002-0160(11)60120-3
Vendruscolo F, da Rocha Ferreira GL, Antoniosi Filho NR (2017) Biosorption of hexavalent chromium by microorganisms. Int Biodeterior Biodegrad 119:87–95. https://doi.org/10.1016/j.ibiod.2016.10.008
Vijayaraj AS, Mohandass C, Joshi D, Rajput N (2018) Effective bioremediation and toxicity assessment of tannery wastewaters treated with indigenous bacteria. 3 Biotech 8:428. https://doi.org/10.1007/s13205-018-1444-3
Walker CH, Sibly CH, Hopkin SP, Peakall DB (2012) Principles of Ecotoxicology, Fourth Edition
Wang H, Yang A, Zhang G, Ma B, Meng F, Peng M, Wang H (2017) Enhancement of carotenoid and bacteriochlorophyll by high salinity stress in photosynthetic bacteria. Int Biodeterior Biodegrad 121:91–96. https://doi.org/10.1016/j.ibiod.2017.03.028
Wang M, Chen Z, Song W, Hong D, Huang L, Li Y (2021) A review on cadmium exposure in the population and intervention strategies against cadmium toxicity. Bull Environ Contam Toxicol 106:65–74. https://doi.org/10.1007/s00128-020-03088-1
Weaver PF, Wall JD, Gest H (1975) Characterization of Rhodopseudomonas capsulata. Arch Microbiol 105:207–216. https://doi.org/10.1007/BF00447139
Wef AA (2005) Standard methods for the examination of water and wastewater. American Public Health Association, American Water Works Association, Water Environment Federation, Washington
Wei X, Fang L, Cai P, Huang Q, Chen H, Liang W, Rong X (2011) Influence of extracellular polymeric substances (EPS) on Cd adsorption by bacteria. Environ Pollut 159:1369–1374. https://doi.org/10.1016/j.envpol.2011.01.006
Xia X, Wu S, Zhou Z, Wang G (2021) Microbial Cd(II) and Cr(VI) resistance mechanisms and application in bioremediation. J Hazard Mater 401:123685. https://doi.org/10.1016/j.jhazmat.2020.123685
Xie D, Chen C, Li C, Wang Q (2021) Influence of Cd on atrazine degradation and the formation of three primary metabolites in water under the combined pollution. Environ Sci Pollut Res Int 28:16081–16091. https://doi.org/10.1007/s11356-020-11819-4
Xu S, Xing Y, Liu S, Hao X, Chen W, Huang Q (2020) Characterization of Cd2+ biosorption by Pseudomonas sp. strain 375, a novel biosorbent isolated from soil polluted with heavy metals in Southern China. Chemosphere 240:124893. https://doi.org/10.1016/j.chemosphere.2019.124893
Yadav R, Kumar R, Gupta RK, Kaur T, Kiran, Kour A, Kaur S, Rajput A (2023) Heavy metal toxicity in earthworms and its environmental implications: a review. Environ Adv 12:100374. https://doi.org/10.1016/j.envadv.2023.100374
Yan Z, Li Y, Peng S et al (2024) Cadmium biosorption and mechanism investigation using two cadmium-tolerant microorganisms isolated from rhizosphere soil of rice. J Hazard Mater 470:134134. https://doi.org/10.1016/j.jhazmat.2024.134134
Yang Q, Li Z, Lu X, Duan Q, Huang L, Bi J (2018) A review of soil heavy metal pollution from industrial and agricultural regions in China: pollution and risk assessment. Sci Total Environ 642:690–700. https://doi.org/10.1016/j.scitotenv.2018.06.068
Yin K, Wang Q, Lv M, Chen L (2019a) Microorganism remediation strategies towards heavy metals. Chem Eng J 360:1553–1563. https://doi.org/10.1016/j.cej.2018.10.226
Yin J, Wang L, Chen Y, Zhang D, Hegazy AM, Zhang X (2019b) A comparison of accumulation and depuration effect of dissolved hexavalent chromium (Cr6+) in head and muscle of bighead carp (Aristichthys nobilis) and assessment of the potential health risk for consumers. Food Chem 286:388–394. https://doi.org/10.1016/j.foodchem.2019.01.186
Zhou Q, Zhang P, Zhang G, Peng M (2015) Biomass and pigments production in photosynthetic bacteria wastewater treatment: effects of photoperiod. Bioresour Technol 190:196–200. https://doi.org/10.1016/j.biortech.2015.04.092
Zhu W, Xu X, Xia L, Huang Q, Chen W (2016) Comparative analysis of mechanisms of Cd2+and Ni2+biosorption by living and non-living Mucoromycote sp. XLC. Geomicrobiol J 33:274–282. https://doi.org/10.1080/01490451.2015.1052114
Zhu S, Wang S, Yang X, Tufail S, Chen C, Wang X, Shang J (2020) Green sustainable and highly efficient hematite nanoparticles modified biochar-clay granular composite for Cr(VI) removal and related mechanism. J Clean Prod 276:123009. https://doi.org/10.1016/j.jclepro.2020.123009
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Authors gratefully acknowledge financial support from the Coordination for the Improvement of Higher Education Personnel (CAPES, Brazil), National Council for Scientific and Technological Development (CNPQ, Brazil), and Minas Gerais Research Funding Foundation (FAPEMIG, Brazil).
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This work was supported by Minas Gerais Research Funding Foundation (FAPEMIG, Brazil) (Grant numbers [APQ-00785-18] and [APQ-00606-23].
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DAS contributed to this research work in Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Writing—original draft. GAS contributed to this research work in Formal analysis, Investigation. MMdeR contributed to this research work in Data curation, Formal analysis. LNSSF contributed to this research work in Conceptualization and methodology. As the corresponding author, I, FRXB, contributed to this research work in Conceptualization, Funding acquisition, Methodology, and Writing—original draft.
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Santos, D.A., Santos, G.A., de Resende, M.M. et al. A novel association by Rhodospirillum rubrum and Rhodobacter capsulatus for bioremediation of heavy metals from aqueous solutions. Biodegradation 36, 103 (2025). https://doi.org/10.1007/s10532-025-10199-1
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DOI: https://doi.org/10.1007/s10532-025-10199-1