1
|
Hasan MI, Bag S, Halder D, Bhowmik S, Chakraborty A, Ghosh A. Simultaneous removal of malachite green and lead from water by consortium dry-biomasses of Bacillus licheniformis AG3 and Bacillus cereus M 116. Sci Rep 2024; 14:19707. [PMID: 39181952 PMCID: PMC11344758 DOI: 10.1038/s41598-024-70658-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 08/20/2024] [Indexed: 08/27/2024] Open
Abstract
Synthetic textile dye malachite green (MG) and heavy metals present in industrial wastewater are hazardous to the ecosystem. Bioremediation of dyes and heavy metals using dry-biomasses has advantages over chemical methods. This study screened an acclimatized, heavy metal-resistant, and dye-degrading Gram positive Bacillus licheniformis AG3 strain from the textile wastewater near Kolkata, West Bengal. The EDXRF analysis of this colored wastewater effluent showed 36.33 mg/L lead, significantly higher than the WHO recommendation. Previously, Bag et al. showed bioremediation of synthetic dyes using dry-biomass of Bacillus cereus M116 from an aqueous solution (Bag et al. Arch Microbiol 203(7):3811-3823, 2021). Here, a consortium of dry-biomasses of B. licheniformis AG3 and B. cereus M116 strains (1:1 w/w ratio) was prepared for the simultaneous removal of lead and MG from wastewater. Statistical optimization determines that the pH, initial concentration of contaminants, and dry-biomass concentrations are critical for bioremediation under batch procedures. Further, optimization using the response surface methodology showed that 0.01% consortium dry-biomasses eliminated a maximum of 99.35% MG and 96.01% lead (II) within 6 h. SEM-EDS and FTIR confirmed a strong surface biosorption. Furthermore, a fixed-bed biofilter column of the consortium dry-biomasses was prepared, which was able to remove 98.1% MG and 98.5% lead at the 0.5-1 mL/min flow rate. Together, this study developed a biofilter with a consortium dry biomasses of B. licheniformis AG3 and B. cereus M116 for the simultaneous removal of MG and lead from wastewater.
Collapse
Affiliation(s)
- Md Imran Hasan
- Department of Biochemistry, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Surajit Bag
- Department of Food Technology and Biochemical Engineering, Jadavpur University, 188, Raja S.C. Mallick Road, Kolkata, 700032, India
- Vijaygarh Jyotish Ray College, University of Calcutta, 8, 2, Jadavpur Central Rd, Bijoygarh, Jadavpur, Kolkata, 700032, India
| | - Dipankar Halder
- Department of Food Technology and Biochemical Engineering, Jadavpur University, 188, Raja S.C. Mallick Road, Kolkata, 700032, India
| | - Sutapa Bhowmik
- Qualissure Laboratory Services, 45/361 Prantik Pally, Kolkata, 700107, India
| | - Anindita Chakraborty
- UGC-DAE Consortium for Scientific Research, Kolkata Centre, Block-LB, Plot-8, Sector-III, Bidhan Nagar, Kolkata, West Bengal, 700106, India
| | - Alok Ghosh
- Department of Biochemistry, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India.
| |
Collapse
|
2
|
Jiao Z, Gao C, Li J, Lu J, Wang J, Li L, Chen X. Weathered Coal-Immobilized Microbial Materials as a Highly Efficient Adsorbent for the Removal of Lead. Molecules 2024; 29:660. [PMID: 38338404 PMCID: PMC10856798 DOI: 10.3390/molecules29030660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/22/2024] [Accepted: 01/25/2024] [Indexed: 02/12/2024] Open
Abstract
Most research on immobilized microorganisms employs biomass charcoal as a carrier, but limited studies explore coal-based resources for microbial immobilization. Herein, lead-resistant functional strains were immobilized using weathered coal as a carrier, resulting in the development of a weathered coal-immobilized microbial material (JK-BW) exhibiting high efficiency in lead removal from solutions. A quadratic polynomial model for the adsorption capacity and adsorption rate of JK-BW on Pb2+ was developed using the Box-Behnken method to determine the optimal adsorption conditions. The Pb2+ adsorption mechanism of JK-BW was studied through batch adsorption and desorption experiments along with SEM-EDS, BET, FT-IR, and XPS analyses. Findings indicated that optimal conditions were identified at 306 K temperature, 0.36 g/L adsorbent dosage, and 300 mg/L initial solution concentration, achieving a peak adsorption performance of 338.9 mg/g (308 K) for the immobilized material, surpassing free cell adsorption by 3.8 times. Even after four cycles of repeated use, the material maintained its high adsorption capacity. Pb2+ adsorption by JK-BW involved monolayer chemisorption with ion exchange, complexation, precipitation, physical adsorption, and microbial intracellular phagocytosis. Ion exchange accounted for 22-42% and complexation accounted for 39-57% of the total adsorption mechanisms, notably involving exchanges with K, Ca, Na, and Mg ions as well as complexation with -OH, -COOH, CO-OH, -COOH, CO-, NH2, and the β-ring of pyridine for Pb2+ adsorption.
Collapse
Affiliation(s)
- Zile Jiao
- College of Resources and Environment, Shanxi Agricultural University, Taiyuan 030031, China; (Z.J.); (J.L.); (J.L.); (J.W.); (L.L.)
- Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources, Taiyuan 030031, China
| | - Chunhua Gao
- College of Resources and Environment, Shanxi Agricultural University, Taiyuan 030031, China; (Z.J.); (J.L.); (J.L.); (J.W.); (L.L.)
- Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources, Taiyuan 030031, China
| | - Jianhua Li
- College of Resources and Environment, Shanxi Agricultural University, Taiyuan 030031, China; (Z.J.); (J.L.); (J.L.); (J.W.); (L.L.)
- Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources, Taiyuan 030031, China
| | - Jinjing Lu
- College of Resources and Environment, Shanxi Agricultural University, Taiyuan 030031, China; (Z.J.); (J.L.); (J.L.); (J.W.); (L.L.)
- Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources, Taiyuan 030031, China
| | - Juan Wang
- College of Resources and Environment, Shanxi Agricultural University, Taiyuan 030031, China; (Z.J.); (J.L.); (J.L.); (J.W.); (L.L.)
- Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources, Taiyuan 030031, China
| | - Lin Li
- College of Resources and Environment, Shanxi Agricultural University, Taiyuan 030031, China; (Z.J.); (J.L.); (J.L.); (J.W.); (L.L.)
- Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources, Taiyuan 030031, China
| | - Xiaojing Chen
- College of Resources and Environment, Shanxi Agricultural University, Taiyuan 030031, China; (Z.J.); (J.L.); (J.L.); (J.W.); (L.L.)
- Shanxi Province Key Laboratory of Soil Environment and Nutrient Resources, Taiyuan 030031, China
- Institute of Loess Plateau, Shanxi University, Taiyuan 030006, China
| |
Collapse
|
3
|
Borham A, Okla MK, El-Tayeb MA, Gharib A, Hafiz H, Liu L, Zhao C, Xie R, He N, Zhang S, Wang J, Qian X. Decolorization of Textile Azo Dye via Solid-State Fermented Wheat Bran by Lasiodiplodia sp. YZH1. J Fungi (Basel) 2023; 9:1069. [PMID: 37998874 PMCID: PMC10672102 DOI: 10.3390/jof9111069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 11/25/2023] Open
Abstract
Textile dyes are one of the major water pollutants released into water in various ways, posing serious hazards for both aquatic organisms and human beings. Bioremediation is a significantly promising technique for dye decolorization. In the present study, the fungal strain Lasiodiplodia sp. was isolated from the fruiting bodies of Schizophyllum for the first time. The isolated fungal strain was examined for laccase enzyme production under solid-state fermentation conditions with wheat bran (WB) using ABTS and 2,6-Dimethoxyphenol (DMP) as substrates, then the fermented wheat bran (FWB) was evaluated as a biosorbent for Congo red dye adsorption from aqueous solutions in comparison with unfermented wheat bran. A Box-Behnken design was used to optimize the dye removal by FWB and to analyze the interaction effects between three factors: fermentation duration, pH, and dye concentration. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) were applied to study the changes in the physical and chemical characteristics of wheat bran before and after fermentation. An additional experiment was conducted to investigate the ability of the Lasiodiplodia sp. YZH1 to remove Congo red in the dye-containing liquid culture. The results showed that laccase was produced throughout the cultivation, reaching peak activities of ∼6.2 and 22.3 U/mL for ABTS and DMP, respectively, on the fourth day of cultivation. FWB removed 89.8% of the dye (100 mg L-1) from the aqueous solution after 12 h of contact, whereas WB removed only 77.5%. Based on the Box-Behnken design results, FWB achieved 93.08% dye removal percentage under the conditions of 6 days of fermentation, pH 8.5, and 150 mg L-1 of the dye concentration after 24 h. The fungal strain removed 95.3% of 150 mg L-1 of the dye concentration after 8 days of inoculation in the dye-containing liquid culture. These findings indicate that this strain is a worthy candidate for dye removal from environmental effluents.
Collapse
Affiliation(s)
- Ali Borham
- Key Laboratory of Cultivated Land Quality Monitoring and Evaluation, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou 225127, China; (A.B.); (J.W.)
- Agriculture Products Safety and Environment, College of Agriculture, Yangzhou University, Yangzhou 225127, China
- Agricultural Botany Department, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt
| | - Mohammad K. Okla
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; (M.K.O.); (M.A.E.-T.)
| | - Mohamed A. El-Tayeb
- Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; (M.K.O.); (M.A.E.-T.)
| | - Ahmed Gharib
- National Institute of Laser Enhanced Sciences (NILES), Cairo University, Giza 12613, Egypt;
| | - Hanan Hafiz
- Biotechnology Department, Faculty of Science, Damietta University, New Damietta 34517, Egypt;
| | - Lei Liu
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; (L.L.); (C.Z.); (R.X.); (N.H.); (S.Z.)
| | - Chen Zhao
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; (L.L.); (C.Z.); (R.X.); (N.H.); (S.Z.)
| | - Ruqing Xie
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; (L.L.); (C.Z.); (R.X.); (N.H.); (S.Z.)
| | - Nannan He
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; (L.L.); (C.Z.); (R.X.); (N.H.); (S.Z.)
| | - Siwen Zhang
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; (L.L.); (C.Z.); (R.X.); (N.H.); (S.Z.)
| | - Juanjuan Wang
- Key Laboratory of Cultivated Land Quality Monitoring and Evaluation, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou 225127, China; (A.B.); (J.W.)
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; (L.L.); (C.Z.); (R.X.); (N.H.); (S.Z.)
| | - Xiaoqing Qian
- Key Laboratory of Cultivated Land Quality Monitoring and Evaluation, Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou 225127, China; (A.B.); (J.W.)
- College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China; (L.L.); (C.Z.); (R.X.); (N.H.); (S.Z.)
| |
Collapse
|
4
|
Tahir U, Zameer M, Ali Q, Rafique A, Ali SM, Arif MU, Nawaz I, Malook SU, Ali D. Toxicity assessment of heavy metal (Pb) and its bioremediation by potential bacterial isolates. ENVIRONMENTAL MONITORING AND ASSESSMENT 2023; 195:1047. [PMID: 37589892 DOI: 10.1007/s10661-023-11632-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 07/24/2023] [Indexed: 08/18/2023]
Abstract
Lead (Pb) is a non-essential metal with high toxicity, is persistent, is not biodegradable, and has no known biological function. It is responsible for severe health and environmental issues that need appropriate remediation. Therefore, microbes have thrived in a lead-contaminated environment without exhibiting any negative impacts. The present study aimed to examine the toxic effects of lead on animals and the isolation, identification, and characterization of lead-resistant bacterial strains and their biodegradation potential. After oral administration of lead for 4 weeks, mice showed an elevated level of leukocytes and a decrease in TEC, Hb, PCV, MCV, MCH, and MCHC levels. However, a decline in body weight and inflammation and oxidative stress was observed in liver tissues. To remediate toxic heavy metal, lead-resistant bacterial strains were isolated, among which Enterobacter exhibited maximum degradation potential at high lead concentrations. It was identified by molecular basis and after 16S rRNA sequencing, and 99% resemblance was observed with Enterobacter cloacae. FT-IR analysis of the bacteria illustrated the presence of functional groups, including hydroxyl, carboxyl group, sulfide, and amino groups, on the bacterial cell surface involved in the adsorption of lead. Moreover, electron microscopy (SEM) revealed the morphological and physiochemical changes in the bacterial cell after biosorption, indicating the interaction of Cu ions with functional groups. To summarize, the findings show the highly toxic effects of lead on animals and humans and its effective biodegradation by the bacterial strains in the lead-contaminated environment. This biological strategy can be an ideal alternative to remediate heavy metals from contaminated sites to clean up the environment.
Collapse
Affiliation(s)
- Usaal Tahir
- Institute of Molecular Biology and Biotechnology, The University of Lahore, 1 KM Defence Road, Lahore, Pakistan.
| | - Mariam Zameer
- Institute of Molecular Biology and Biotechnology, The University of Lahore, 1 KM Defence Road, Lahore, Pakistan
| | - Qurban Ali
- Department of Plant Breeding and Genetics, Faculty of Agricultural Sciences, University of the Punjab, PO BOX 54590, Lahore, Pakistan.
| | - Ayesha Rafique
- Institute of Molecular Biology and Biotechnology, The University of Lahore, 1 KM Defence Road, Lahore, Pakistan
| | - Syeda Maham Ali
- Institute of Molecular Biology and Biotechnology, The University of Lahore, 1 KM Defence Road, Lahore, Pakistan
| | - Muhammad Umer Arif
- Institute of Molecular Biology and Biotechnology, The University of Lahore, 1 KM Defence Road, Lahore, Pakistan
| | - Imtiaz Nawaz
- Institute of Molecular Biology and Biotechnology, The University of Lahore, 1 KM Defence Road, Lahore, Pakistan
| | - Saif Ul Malook
- Department of Entomology & Nematology, University of Florida, Gainesville, USA
| | - Daoud Ali
- Department of Zoology, College of Science, King Saud University, PO Box 2455, Riyadh, 11451, Saudi Arabia
| |
Collapse
|
5
|
Mushtaq M, Arshad N, Hameed M, Munir A, Javed GA, Rehman A. Lead biosorption efficiency of Levilactobacillus brevis MZ384011 and Levilactobacillus brevis MW362779: A response surface based approach. Saudi J Biol Sci 2023; 30:103547. [PMID: 36698856 PMCID: PMC9868880 DOI: 10.1016/j.sjbs.2022.103547] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 11/18/2022] [Accepted: 12/17/2022] [Indexed: 12/25/2022] Open
Abstract
Lead (Pb) is a substantial contaminant in the environment and a potent toxin for living organisms. Current study describes probiotic characteristics of Pb-biosorbing lactic acid bacteria (LAB), and response surface methodology (RSM) based optimization of physical conditions for maximum Pb biosorption. A total of 18 LAB, isolated from carnivore feces (n = 8) and human breast milk (n = 9), along with one reference strain Lactobacillus acidophilus ATCC4356 were included in the study. Pb biosorption was strain specific. Eight strains, demonstrating ≥ 70 % lead biosorption, were selected for further testing. The lactobacillus-Pb complex was found to be stable and strains had a negative surface charge. The strains displayed good probiotic properties with the survival rate of 71-90 % in simulated gastric environment, 36-69 % in intestinal condition (1.8 % bile salts) and 55-72 % hydrophobicity. On the basis of excellent probiotic ability, Levilactobacillus brevis MZ384011 and Levilactobacillus brevis MW362779 were selected for optimization of physical conditions of Pb biosorption through RSM. Maximum biosorption was observed at pH 6 in 60 min at a cell density of 1 g/L. L. brevis MZ384011 and L. brevis MW362779 are recommended for experimentation on Pb toxicity amelioration and safety evaluation in in-vivo setting.
Collapse
Affiliation(s)
- Maria Mushtaq
- Institute of Zoology, University of the Punjab, 54590 Lahore, Pakistan
| | - Najma Arshad
- Institute of Zoology, University of the Punjab, 54590 Lahore, Pakistan,Institute of Molecular Biology and Biotechnology (IMBB), Centre for Research in Molecular Medicine (CRIMM), The University of Lahore, 54792, Pakistan,Corresponding author at: Institute of Zoology, University of the Punjab, Pakistan and Department of Zoology, Institute of Molecular Biology and Biotechnology (IMBB), Centre for Research in Molecular Medicine (CRIMM), The University of Lahore, Pakistan.
| | - Mamoona Hameed
- Institute of Zoology, University of the Punjab, 54590 Lahore, Pakistan
| | - Aneela Munir
- Institute of Zoology, University of the Punjab, 54590 Lahore, Pakistan
| | | | - Abdul Rehman
- Institute of Microbiology and Molecular Genetics (MMG), University of the Punjab, 54590, Lahore, Pakistan
| |
Collapse
|
6
|
Dawwam GE, Abdelfattah NM, Abdel-Monem MO, Jahin HS, Omer AM, Abou-Taleb KA, Mansor ES. An immobilized biosorbent from Paenibacillus dendritiformis dead cells and polyethersulfone for the sustainable bioremediation of lead from wastewater. Sci Rep 2023; 13:891. [PMID: 36650253 PMCID: PMC9845294 DOI: 10.1038/s41598-023-27796-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 01/09/2023] [Indexed: 01/18/2023] Open
Abstract
Heavy metals, including lead, cause serious damage to human health and the surrounding environment. Natural biosorbents arise as environmentally friendly alternatives. In this study, two of the 41 isolates (8EF and 17OS) were the most efficient bacteria for growing on media supplemented with Pb2+ (1000 mg/L). At high concentrations up to 2000 mg/L, the pioneer isolate 17OS exhibited remarkable resistance to multiheavy metals. This isolate was identified as Paenibacillus dendritiformis 17OS and deposited in GenBank under accession number ON705726.1. Design-Expert was used to optimize Pb2+ metal removal by the tested bacteria. Results indicated that four of six variables were selected using a minimum-run resolution IV experimental design, with a significant affecting Pb2+ removal. Temperature and Pb2+ concentration were significant positive influences, whereas incubation period and agitation speed were significant negative ones. The tested strain modulated the four significant variables for maximum Pb2+ removal using Box-Behnken design. The sequential optimization method was beneficial in increasing biosorption by 4.29%. Dead biomass of P. dendritiformis 17OS was embedded with polyethersulfone to get a hydrophilic adsorptive membrane that can separate Pb2+ easily from aqueous solutions. SEM images and FT-IR analysis proved that the new biosorbent possesses a great structure and a lot of surface functional groups with a negative surface charge of - 9.1 mV. The removal rate of 200 mg/L Pb2+ from water reached 98% using 1.5 g/L of the immobilized biosorbent. The adsorption isotherm studies were displayed to determine the nature of the reaction. The adsorption process was related to Freundlich isotherm which describes the multilayer and heterogeneous adsorption of molecules to the adsorbent surface. In conclusion, dead bacterial cells were immobilized on a polyether sulfone giving it the characteristics of a novel adsorptive membrane for the bioremediation of lead from wastewater. Thus this study proposed a new generation of adsorptive membranes based on polyethersulfone and dead bacterial cells.
Collapse
Affiliation(s)
- Ghada E Dawwam
- Botany and Microbiology Department, Faculty of Science, Benha University, Benha, 13518, Egypt.
| | - Nehad M Abdelfattah
- Botany and Microbiology Department, Faculty of Science, Benha University, Benha, 13518, Egypt
| | - Mohamed O Abdel-Monem
- Botany and Microbiology Department, Faculty of Science, Benha University, Benha, 13518, Egypt
| | - Hossam S Jahin
- Central Laboratory for Environmental Quality Monitoring, National Water Research Center, Elkanatir, 13621, Egypt
| | - Amal M Omer
- Department of Soil Fertility and Microbiology, Desert Research Center, El-Matareya 11753, Cairo, Egypt
| | - Khadiga A Abou-Taleb
- Department of Agricultural Microbiology, Faculty of Agriculture, Ain Shams University, Hadayek Shubra 11241, P.O. Box 68, Cairo, Egypt
| | - Eman S Mansor
- Water Pollution Research Department, National Research Centre, Environment and Climate Change Research Institute, Dokki, Cairo, Egypt
| |
Collapse
|
7
|
Mahmoudian M, Sarrafi AHM, Konoz E, Niazi A. Magnetic Dispersive Solid‐Phase Extraction Using Toner Powder for Trace Determination of Heavy Metals in Vegetables and Aqueous Media by FAAS: Box‐Behnken Design. ChemistrySelect 2022. [DOI: 10.1002/slct.202203738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Masoumeh Mahmoudian
- Department of Chemistry Central Tehran Branch Islamic Azad University Tehran Iran
| | | | - Elaheh Konoz
- Department of Chemistry Central Tehran Branch Islamic Azad University Tehran Iran
| | - Ali Niazi
- Department of Chemistry Central Tehran Branch Islamic Azad University Tehran Iran
| |
Collapse
|
8
|
The Biosorption of Copper(II) Using a Natural Biofilm Formed on the Stones from the Metro River, Malang City, Indonesia. Int J Microbiol 2022; 2022:9975333. [PMID: 36204461 PMCID: PMC9532089 DOI: 10.1155/2022/9975333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/25/2022] [Accepted: 08/02/2022] [Indexed: 11/17/2022] Open
Abstract
Biofilm is the predominant habitat of microbes in aquatic ecosystems. Microhabitat inside the biofilm matrix is a nutrient-rich environment promoted by the adsorption of nutrient ions from the surrounding water. Biofilms can not only adsorb ions that are nutrients but also other ions, such as heavy metals. The ability of biofilm to attract and retain heavy metals, such as copper(II), makes biofilms a promising biosorbent for water pollution treatment. The present study analyzes the characteristics of copper(II) adsorption by biofilms naturally formed in the river. The biofilms used in this study grow naturally on the stones in the Metro River in Malang City, Indonesia. Methods to analyze the adsorption characteristics of copper(II) by biofilms were kinetics of the adsorption and adsorption isotherm. The maximum adsorption amount and the adsorption equilibrium constant were calculated using a variant of the Langmuir isotherm model. In addition, the presence of the functional groups as suggested binding sites in biofilm polymers was investigated using the Fourier transform infrared (FTIR) analysis. The results indicate that copper(II)’s adsorption to the biofilm is a physicochemical process. The adsorption of copper(II) is fitted well with the Langmuir isotherm model, suggesting that the adsorption of copper(II) to a biofilm is due to the interaction between the adsorption sites on the biofilm and the ions. The biofilm’s maximum absorption capacity for copper(II) is calculated to be 2.14 mg/wet-g of biofilm, with the equilibrium rate constant at 0.05 L/mg. Therefore, the biofilms on the stones from river can be a promising biosorbent of copper(II) pollution in aquatic ecosystems.
Collapse
|
9
|
Raeisi I, Derakhshi P, Azar PA, Tehrani MS. Novel photocatalyst system to deep desulfurization of petroleum model and gas condensate by Box–Behnken design. CAN J CHEM 2022. [DOI: 10.1139/cjc-2021-0342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In this research, cobalt (Co)/molybdenum (Mo) and nickel (Ni) doped with titanium dioxide (TiO2) were loaded onto multi-walled carbon nanotubes (MWCNTs). Then, the magnetization catalyst, iron oxide (Fe3O4), was loaded on them, which was used for the deep desulfurization of dibenzothiophene (DBT). These catalysts were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, differential reflectance spectroscopy, and Brunauer–Emmett–Teller, Barrett–Joyner–Halenda, and vibrating sample magnetometer techniques. The photocatalytic activity of these catalysts was experienced under visible light using DBT. The response surface methodology based on the Box–Behnken design was used to evaluate parameters, including catalyst dosage (g), time (min), and concentration of DBT (mg L−1). The highest degradation efficiency under optimal conditions for CoMoNi/TiO2/MWCNTs/Fe3O4 catalysts with a catalyst dosage of 0.3 g, a time of 180 min, and a concentration of 50 mg L−1 was 99.99%. Optimum conditions were studied for desulfurization of the gas condensate. The highest desulfurization efficiency (90.33%) was obtained by the CoMoNi/TiO2/MWCNTs/Fe3O4 catalyst.
Collapse
Affiliation(s)
- Ilnaz Raeisi
- Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran
| | - Pirouz Derakhshi
- Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran
| | - Parviz Aberoomand Azar
- Department of Chemistry, Islamic Azad University Science and Research Branch, Tehran, Iran
| | - Mohammad Saber Tehrani
- Department of Chemistry, Islamic Azad University Science and Research Branch, Tehran, Iran
| |
Collapse
|
10
|
Lewis A, Guéguen C. Using chemometric models to predict the biosorption of low levels of dysprosium by Euglena gracilis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:58936-58949. [PMID: 35377126 DOI: 10.1007/s11356-022-19918-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
The critical rare earth element dysprosium (Dy) is integral for sustainable technologies. What is concerning is that Dy is in imminent short supply and no current replacements yet exist, coupled with increasing environmental Dy levels influenced by anthropogenic activities. This study applies chemometric methods such as response surface methodology and artificial neural networks to predict low Dy removal levels using the biosorbent Euglena gracilis. A three-factor Box-Behnken experimental design was conducted with initial concentration (1 to 100 µg L-1), contact time (30 to 180 min), and pH (3 to 8) as the three independent variables, and percentage removal and sorption capacity (q) as dependent variables. Using Dy percentage removal as response, for the worst and best conditions ranged from 0 to 92% respectively, with an average removal of 66 ± 4%. Using sorption capacity (q) as a different response variable, q varied from 0 to 93 µg/g with 27 ± 4 µg/g capacity as average. Maximum removal was 92% (q = 93 µg/g) was at pH 3, a contact time of 105 min and at a concentration of 100 µg/L. Using sorption capacity as the response variable for ANOVA, pH and metal concentrations were statistically significant factors, with lower pH and higher metal concentration having improved Dy removal, with a desirability near 1. Statistical tests such as analysis of variance, lack-of-fit, and coefficient of determination (R2) confirmed model validity. A 3-10-1 ANN network array was used to model experimental responses (q). RSM and ANN effectively modeled Dy biosorption. E. gracilis proved to be a cheap and effective biosorbent for Dy biosorption and has the potential to remediate acid mine drainage areas exhibiting low Dy concentrations.
Collapse
Affiliation(s)
- Ainsely Lewis
- Environmental and Life Sciences Graduate Program, Trent University, Peterborough, ON, Canada
| | - Céline Guéguen
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec, Canada.
| |
Collapse
|
11
|
Khodadadi S, Konoz E, Niazi A, Ezabadi A. Preconcentration of heavy metal ions on magnetic multi-walled carbon nanotubes using magnetic solid-phase extraction and determination in vegetable samples by electrothermal atomic absorption spectrometry: Box–Behnken design. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02330-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|