1
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Nkuna R, Matambo TS. Insights into metal tolerance and resistance mechanisms in Trichoderma asperellum unveiled by de novo transcriptome analysis during bioleaching. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 356:120734. [PMID: 38520861 DOI: 10.1016/j.jenvman.2024.120734] [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: 12/06/2023] [Revised: 02/09/2024] [Accepted: 03/19/2024] [Indexed: 03/25/2024]
Abstract
This study investigates the genetic responses of the fungus Trichoderma asperellum (T. asperellum) during bioleaching of ore and tailing samples, comparing one-step, two-step, and spent media bioleaching processes. HPLC analysis quantified oxalic acid, citric acid, and propionic acids, with oxalic acid identified as the primary organic acid involved in metal bioleaching. Metal analysis revealed differences in recovery between ore and tailing samples and among bioleaching processes. The two-step bioleaching process yielded the highest zinc (>54%) and nickel (>60%) recovery in tailings and ore, respectively. Nickel's efficient recovery in ore bioleaching was attributed to the presence of manganese, while its precipitation as nickel oxalate in tailings hindered recovery. Additional metals such as Co, Mn, Mg, Cu, and As were also successfully recovered. Transcriptomic analyses showed significant upregulation of genes associated with biological processes and cellular components, particularly those related to cell membrane structure and function, indicating T. asperellum's adaptation to environmental stresses during metal bioleaching. These findings enhance our understanding of the diverse mechanisms influencing metal recovery rates in bioleaching processes.
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Affiliation(s)
- Rosina Nkuna
- Centre for Competence in Environmental Biotechnology, Department of Environmental Sciences, College of Animal and Environmental Science, University of South Africa, Florida Science Campus, South Africa
| | - Tonderayi S Matambo
- Centre for Competence in Environmental Biotechnology, Department of Environmental Sciences, College of Animal and Environmental Science, University of South Africa, Florida Science Campus, South Africa.
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2
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Zhang Y, Ma Z, Fang Z, Qian Y, Huang Z, Ye Y, Yan J. Research on oxygen enrichment for municipal solid waste fly ash melting: A pilot-scale study on natural gas and coal as the melting fuel. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 350:119459. [PMID: 38000269 DOI: 10.1016/j.jenvman.2023.119459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 10/15/2023] [Accepted: 10/21/2023] [Indexed: 11/26/2023]
Abstract
High energy consumption is the main obstacle of melting/vitrification technology for the disposal of municipal solid waste incineration fly ash (MSWIFA) for industrial applications. To reduce energy consumption and lower operating costs, oxygen enrichment melting was proposed and studied in this work. This research was conducted in a pilot-scale melting furnace, and three melting conditions were compared and discussed. The results showed that 66% of natural gas was saved and the operating cost was reduced by 55% when oxygen enrichment technology was applied to MSWIFA melting. When coal was used as the fuel with the oxygen enrichment melting technology, the operating cost was even lower at 66.39 dollar/ton of fly ash. Because MSWIFA was a Ca-rich material, the relatively high content of Si and Al in the coal fly ash promoted the formation of vitrificated slag, leading to a reduction in the overall pollution toxicity index (OPTI) of MSWIFA by 99.98%. Meanwhile, SO2, HCl, and secondary fly ash were the main pollutants during MSWIFA melting, and when coal was used as the fuel, the emissions of SO2 and HCl could be reduced and the OPTI of secondary fly ash was suppressed. These results suggested that to obtain the lowest operating cost and reduce secondary pollution during MSWIFA melting, the best option consisted of oxygen enrichment technology with coal as the fuel.
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Affiliation(s)
- Yike Zhang
- Ningbo Innovation Center, Zhejiang University, Ningbo, 315100, China; State Key Laboratory of Energy Clean Utilization, Zhejiang University, Hangzhou, 310027, China
| | - Zengyi Ma
- Ningbo Innovation Center, Zhejiang University, Ningbo, 315100, China; State Key Laboratory of Energy Clean Utilization, Zhejiang University, Hangzhou, 310027, China.
| | - Zhuoting Fang
- Ningbo Innovation Center, Zhejiang University, Ningbo, 315100, China
| | - Yuandong Qian
- Ningbo Innovation Center, Zhejiang University, Ningbo, 315100, China
| | - Zhiping Huang
- Ningbo Innovation Center, Zhejiang University, Ningbo, 315100, China
| | - Yilong Ye
- Ningbo Innovation Center, Zhejiang University, Ningbo, 315100, China
| | - Jianhua Yan
- Ningbo Innovation Center, Zhejiang University, Ningbo, 315100, China
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3
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Zhang J, Feng L, Liu Z, Chen L, Gu Q. Source apportionment of heavy metals in PM 2.5 samples and effects of heavy metals on hypertension among schoolchildren in Tianjin. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:8451-8472. [PMID: 37639041 DOI: 10.1007/s10653-023-01689-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 07/11/2023] [Indexed: 08/29/2023]
Abstract
The prevalence of hypertension in children has increased significantly in recent years in China. The aim of this study was to provide scientific support to control ambient heavy metals (HMs) pollution and prevent childhood hypertension. In this study, ambient HMs in PM2.5 were collected, and 1339 students from Tianjin were randomly selected. Positive matrix factorization (PMF) was used to identify and determine the sources of HMs pollution. The generalized linear model, Bayesian kernel machine regression (BKMR) and the quantile g-computation method were used to analyze the relationships between exposure to HMs and the risk of childhood hypertension. The results showed that HMs in PM2.5 mainly came from four sources: soil dust, coal combustion, incineration of municipal waste and the metallurgical industry. The positive relationships between As, Se and Pb exposures and childhood hypertension risk were found. Coal combustion and incineration of municipal waste were important sources of HMs in the occurrence of childhood hypertension. Based on these accomplishments, this study could provide guidelines for the government and individuals to alleviate the damaging effects of HMs in PM2.5. The government must implement policies to control prime sources of HMs pollution.
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Affiliation(s)
- Jingwei Zhang
- Department of Environmental Health and School Hygiene, Tianjin Centers for Disease Control and Prevention, No.6 Huayue Rd, Tianjin, China
| | - Lihong Feng
- Department of Environmental Health and School Hygiene, Tianjin Centers for Disease Control and Prevention, No.6 Huayue Rd, Tianjin, China
| | - Zhonghui Liu
- Department of Environmental Health and School Hygiene, Tianjin Centers for Disease Control and Prevention, No.6 Huayue Rd, Tianjin, China
| | - Lu Chen
- Department of Environmental Health and School Hygiene, Tianjin Centers for Disease Control and Prevention, No.6 Huayue Rd, Tianjin, China
| | - Qing Gu
- Department of Environmental Health and School Hygiene, Tianjin Centers for Disease Control and Prevention, No.6 Huayue Rd, Tianjin, China.
- School of Public Health, Tianjin Medical University, No.22 Qixiangtai Rd, Tianjin, China.
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4
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Guo X, Chen S, Han Y, Hao C, Feng X, Zhang B. Bioleaching performance of vanadium-bearing smelting ash by Acidithiobacillus ferrooxidans for vanadium recovery. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 336:117615. [PMID: 36893541 DOI: 10.1016/j.jenvman.2023.117615] [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: 12/06/2022] [Revised: 02/10/2023] [Accepted: 02/25/2023] [Indexed: 06/18/2023]
Abstract
The bioleaching process is widely used in the treatment of ores or solid wastes, but little is known about its application in the treatment of vanadium-bearing smelting ash. This study investigated bioleaching of smelting ash with Acidithiobacillus ferrooxidans. The vanadium-bearing smelting ash was first treated with 0.1 M acetate buffer and then leached in the culture of Acidithiobacillus ferrooxidans. Comparison between one-step and two-step leaching process indicated that microbial metabolites could contribute to the bioleaching. The Acidithiobacillus ferrooxidans demonstrated a high vanadium leaching potential, solubilizing 41.9% of vanadium from the smelting ash. The optimal leaching condition was determined, which was 1% pulp density, 10% inoculum volume, an initial pH of 1.8, and 3 Fe2+g/L. The compositional analysis showed that the fraction of reducible, oxidizable, and acid-soluble was transferred into the leaching liquor. Therefore, as the alternative to the chemical/physical process, an efficient bioleaching process was proposed to enhance the recovery of vanadium from the vanadium-bearing smelting ash.
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Affiliation(s)
- Xiaoxiao Guo
- MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, School of Water Resources and Environment, China University of Geosciences Beijing, Beijing, 100083, China
| | - Siming Chen
- MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, School of Water Resources and Environment, China University of Geosciences Beijing, Beijing, 100083, China.
| | - Yawei Han
- MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, School of Water Resources and Environment, China University of Geosciences Beijing, Beijing, 100083, China
| | - Chunbo Hao
- MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, School of Water Resources and Environment, China University of Geosciences Beijing, Beijing, 100083, China
| | - Xiujuan Feng
- The School of Mines, China University of Mining and Technology(CUMT);MechanoChemistry Research Institute, China University of Mining and Technology(CUMT), Xuzhou, Jiangsu, 221116, China
| | - Baogang Zhang
- MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, School of Water Resources and Environment, China University of Geosciences Beijing, Beijing, 100083, China.
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5
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Funari V, Toller S, Vitale L, Santos RM, Gomes HI. Urban mining of municipal solid waste incineration (MSWI) residues with emphasis on bioleaching technologies: a critical review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:59128-59150. [PMID: 37041362 DOI: 10.1007/s11356-023-26790-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 03/29/2023] [Indexed: 05/10/2023]
Abstract
Metals are essential in our daily lives and have a finite supply, being simultaneously contaminants of concern. The current carbon emissions and environmental impact of mining are untenable. We need to reclaim metals sustainably from secondary resources, like waste. Biotechnology can be applied in metal recovery from waste streams like fly ashes and bottom ashes of municipal solid waste incineration (MSWI). They represent substantial substance flows, with roughly 46 million tons of MSWI ashes produced annually globally, equivalent in elemental richness to low-grade ores for metal recovery. Next-generation methods for resource recovery, as in particular bioleaching, give the opportunity to recover critical materials and metals, appropriately purified for noble applications, in waste treatment chains inspired by circular economy thinking. In this critical review, we can identify three main lines of discussion: (1) MSWI material characterization and related environmental issues; (2) currently available processes for recycling and metal recovery; and (3) microbially assisted processes for potential recycling and metal recovery. Research trends are chiefly oriented to the potential exploitation of bioprocesses in the industry. Biotechnology for resource recovery shows increasing effectiveness especially downstream the production chains, i.e., in the waste management sector. Therefore, this critical discussion will help assessing the industrial potential of biotechnology for urban mining of municipal, post-combustion waste.
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Affiliation(s)
- Valerio Funari
- Institute of Marine Sciences (ISMAR-CNR), Department of Earth System Sciences and Environmental Technologies, National Research Council of Italy (CNR), Bologna Research Area, 40129, Bologna, Italy.
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn (SZN), Via Ammiraglio F. Acton 55, 80133, Napoli, Italy.
| | - Simone Toller
- Institute of Marine Sciences (ISMAR-CNR), Department of Earth System Sciences and Environmental Technologies, National Research Council of Italy (CNR), Bologna Research Area, 40129, Bologna, Italy
- Department of Chemical, Life and Environmental Sustainability Sciences (SCVSA), University of Parma, Parco Area delle Scienze, 17/A, Parma, Italy
| | - Laura Vitale
- Department of Marine Biotechnology, Stazione Zoologica Anton Dohrn (SZN), Via Ammiraglio F. Acton 55, 80133, Napoli, Italy
| | - Rafael M Santos
- School of Engineering, University of Guelph, Thornbrough Building, 50 Stone Rd E, Guelph, Ontario, N1G 2W1, Canada
| | - Helena I Gomes
- Food, Water, Waste Research Group, Faculty of Engineering, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
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6
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Liapun V, Motola M. Current overview and future perspective in fungal biorecovery of metals from secondary sources. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 332:117345. [PMID: 36724599 DOI: 10.1016/j.jenvman.2023.117345] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 01/09/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Microorganisms are intimately involved in many biogeochemical processes that underpin the transformation of metals and cycling of related substances, such as metalloids and radionuclides. Many processes determine the mobility and bioavailability of metals, thereby influencing their transfer to the environment and living organisms. These processes are closely related to global phenomena such as soil formation and bioweathering. In addition to environmental significance, microbial metal transformations play an essential role in both in situ and ex situ bioremediation processes for solid and liquid wastes. The solubilization of heavy metals from industrial waste and soil is commonly used in bioremediation. Moreover, immobilization processes are applicable to bioremediation of metals and radionuclides from aqueous solutions. This review provides an overview of critical metal extraction and recovery from secondary sources, applied microorganisms and methods, metal-microbe interactions, as well as a detailed description of known metal recovery mechanisms.
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Affiliation(s)
- Viktoriia Liapun
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia.
| | - Martin Motola
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovicova 6, 842 15, Bratislava, Slovakia.
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7
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Trivedi A, Vishwakarma A, Saawarn B, Mahanty B, Hait S. Fungal biotechnology for urban mining of metals from waste printed circuit boards: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 323:116133. [PMID: 36099867 DOI: 10.1016/j.jenvman.2022.116133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 08/20/2022] [Accepted: 08/27/2022] [Indexed: 06/15/2023]
Abstract
Rapid surge in electronic waste (e-waste) and its unscientific handling has an adverse impact on humans and the environment. Waste printed circuit board (WPCB), an integrated component of e-waste, has a high metallic content that includes both toxic and precious metals. Therefore, metal recovery is essential not just to avoid environmental degradation but also for economic growth. The current literature analysis focuses on one such eco-friendly approach, known as fungal biotechnology, for extracting metals from WPCBs. Among diverse bioleaching agents, fungi have shown promising metal extraction efficiency (Al: 65-96%; Co: 45-90%; Cu: 34-100%; Ni: 8-95%; Mn: 70-95%; Pb: 27-95%; Zn: 54-99%) and the ability to work in a wide pH range. However, in terms of metal recovery from WPCBs, fungal bioleaching has been less explored. This review, thus, assesses the fungal biotechnology for metal extraction from WPCBs and discusses the associated mechanism and kinetics involved. Different process parameters affecting the fungal bioleaching have also been discussed briefly. The review highlights that, while this process has enough potential, some associated drawbacks hinder its practical applicability on an industrial scale. Lastly, some suggestions for scaling up and reducing the cost of the process have been made, which need to be addressed.
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Affiliation(s)
- Amber Trivedi
- Department of Civil and Environmental Engineering, Indian Institute of Technology Patna, Bihar, 801 106, India
| | - Anusha Vishwakarma
- Department of Civil and Environmental Engineering, Indian Institute of Technology Patna, Bihar, 801 106, India
| | - Bhavini Saawarn
- Department of Civil and Environmental Engineering, Indian Institute of Technology Patna, Bihar, 801 106, India
| | - Byomkesh Mahanty
- Department of Civil and Environmental Engineering, Indian Institute of Technology Patna, Bihar, 801 106, India
| | - Subrata Hait
- Department of Civil and Environmental Engineering, Indian Institute of Technology Patna, Bihar, 801 106, India.
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8
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Sun CQ, Peng J, Yang LB, Jiao ZL, Zhou LX, Tao RY, Zhu LJ, Tian ZQ, Huang MJ, Guo G. A Cecropin-4 Derived Peptide C18 Inhibits Candida albicans by Disturbing Mitochondrial Function. Front Microbiol 2022; 13:872322. [PMID: 35531288 PMCID: PMC9075107 DOI: 10.3389/fmicb.2022.872322] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 03/14/2022] [Indexed: 12/18/2022] Open
Abstract
Global burden of fungal infections and related health risk has accelerated at an incredible pace, and multidrug resistance emergency aggravates the need for the development of new effective strategies. Candida albicans is clinically the most ubiquitous pathogenic fungus that leads to high incidence and mortality in immunocompromised patients. Antimicrobial peptides (AMPs), in this context, represent promising alternatives having potential to be exploited for improving human health. In our previous studies, a Cecropin-4-derived peptide named C18 was found to possess a broader antibacterial spectrum after modification and exhibit significant antifungal activity against C. albicans. In this study, C18 shows antifungal activity against C. albicans or non-albicans Candida species with a minimum inhibitory concentration (MIC) at 4∼32 μg/ml, and clinical isolates of fluconazole (FLZ)-resistance C. tropicalis were highly susceptible to C18 with MIC value of 8 or 16 μg/ml. Additionally, C18 is superior to FLZ for killing planktonic C. albicans from inhibitory and killing kinetic curves. Moreover, C18 could attenuate the virulence of C. albicans, which includes damaging the cell structure, retarding hyphae transition, and inhibiting biofilm formation. Intriguingly, in the Galleria mellonella model with C. albicans infection, C18 could improve the survival rate of G. mellonella larvae to 70% and reduce C. albicans load from 5.01 × 107 to 5.62 × 104 CFU. For mechanistic action of C18, the level of reactive oxygen species (ROS) generation and cytosolic Ca2 + increased in the presence of C18, which is closely associated with mitochondrial dysfunction. Meanwhile, mitochondrial membrane potential (△Ψm) loss and ATP depletion of C. albicans occurred with the treatment of C18. We hypothesized that C18 might inhibit C. albicans via triggering mitochondrial dysfunction driven by ROS generation and Ca2 + accumulation. Our observation provides a basis for future research to explore the antifungal strategies and presents C18 as an attractive therapeutic candidate to be developed to treat candidiasis.
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Affiliation(s)
- Chao-Qin Sun
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
- Center of Laboratory Medicine, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
| | - Jian Peng
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Guizhou Medical University, Ministry of Education, Guiyang, China
| | - Long-Bing Yang
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Zheng-Long Jiao
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
- Translational Medicine Research Center, Guizhou Medical University, Guiyang, China
| | - Luo-Xiong Zhou
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Guizhou Medical University, Ministry of Education, Guiyang, China
| | - Ru-Yu Tao
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guizhou Medical University, Kaili, China
| | - Li-Juan Zhu
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Zhu-Qing Tian
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Ming-Jiao Huang
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Guo Guo
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Guizhou Medical University, Ministry of Education, Guiyang, China
- Translational Medicine Research Center, Guizhou Medical University, Guiyang, China
- *Correspondence: Guo Guo,
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9
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Fournie T, Rashwan TL, Switzer C, Gerhard JI. Phosphorus recovery and reuse potential from smouldered sewage sludge ash. WASTE MANAGEMENT (NEW YORK, N.Y.) 2022; 137:241-252. [PMID: 34801957 DOI: 10.1016/j.wasman.2021.11.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 10/22/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
Smouldering treatment of sewage sludge - and recapturing phosphorus - provides important steps towards a circular economy. This study reveals that bulking sludge with sand or another organic waste, e.g., woodchips, created a material that was readily converted to ash by self-sustained smouldering. Simultaneous phosphorus and regulated potentially toxic element releases from ash were evaluated using leaching methods from the USEPA Leaching Environmental Assessment Framework (LEAF). Extraction potentials were also determined to evaluate direct recovery as an alternative to land application. Compared to the parent sludge, post-treatment ash from smouldering sludge with sand contained higher quantities of inorganic phosphorus in sorbed and mineral phases, which can provide beneficial slow phosphorus release to plants and avoid early phosphorus washout during land application. Ash also released lower initial and total quantities of potentially toxic elements than virgin sludge. As an alternative to land application, approximately 42% of retained phosphorus can be recovered directly using acidic extraction, and an additional 30% from emissions. In contrast, co-smouldering sludge with woodchips was more suited for direct recovery with 78% of phosphorus potentially recoverable via emissions capture and yield increasing to 99% with acidic extraction of resulting ash. Co-smouldering also produces a single post-treatment ash and can be readily operated continuously, which aligns with current incinerator configurations at wastewater treatment plants and makes adaptation highly feasible. With phosphorus reuse opportunities for land application and direct recovery, smouldering sewage sludge creates an important opportunity for a phosphorus circular economy as part of wastewater treatment sludge management.
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Affiliation(s)
- T Fournie
- Department of Civil and Environmental Engineering, Western University, N6A 5B9 London, ON, Canada.
| | - T L Rashwan
- Department of Civil and Environmental Engineering, Western University, N6A 5B9 London, ON, Canada; Department of Civil Engineering, Lassonde School of Engineering, York University, Toronto, Ontario M3J 1P3, Canada(1)
| | - C Switzer
- Department of Civil and Environmental Engineering, University of Strathclyde, Glasgow G1 1XJ, United Kingdom.
| | - J I Gerhard
- Department of Civil and Environmental Engineering, Western University, N6A 5B9 London, ON, Canada.
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10
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Anaya-Garzon J, Hubau A, Joulian C, Guezennec AG. Bioleaching of E-Waste: Influence of Printed Circuit Boards on the Activity of Acidophilic Iron-Oxidizing Bacteria. Front Microbiol 2021; 12:669738. [PMID: 34489879 PMCID: PMC8416503 DOI: 10.3389/fmicb.2021.669738] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 07/12/2021] [Indexed: 11/29/2022] Open
Abstract
Bioleaching is a promising strategy to recover valuable metals from spent printed circuit boards (PCBs). The performance of the process is catalyzed by microorganisms, which the toxic effect of PCBs can inhibit. This study aimed to investigate the capacity of an acidophilic iron-oxidizing culture, mainly composed of Leptospirillum ferriphilum, to oxidize iron in PCB-enriched environments. The culture pre-adapted to 1% (w/v) PCB content successfully thrived in leachates with the equivalent of 6% of PCBs, containing 8.5 g L–1 Cu, 8 g L–1 Fe, 1 g L–1 Zn, 92 mg L–1 Ni, 12.6 mg L–1 Pb, and 4.4 mg L–1 Co, among other metals. However, the inhibiting effect of PCBs limited the microbial activity by delaying the onset of the exponential iron oxidation. Successive subcultures boosted the activity of the culture by reducing this delay by up to 2.6 times under batch conditions. Subcultures also favored the rapid establishment of high microbial activity in continuous mode.
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Affiliation(s)
- Juan Anaya-Garzon
- Bureau de Recherches Géologiques et Minières, Orléans, France.,Chimie ParisTech, PSL Research University, CNRS, Institut de Recherche de Chimie Paris, Paris, France
| | - Agathe Hubau
- Bureau de Recherches Géologiques et Minières, Orléans, France
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11
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Wang H, Zhu F, Liu X, Han M, Zhang R. A mini-review of heavy metal recycling technologies for municipal solid waste incineration fly ash. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2021; 39:1135-1148. [PMID: 33818201 DOI: 10.1177/0734242x211003968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This mini-review article summarizes the available technologies for the recycling of heavy metals (HMs) in municipal solid waste incineration (MSWI) fly ash (FA). Recovery technologies included thermal separation (TS), chemical extraction (CE), bioleaching, and electrochemical processes. The reaction conditions of various methods, the efficiency of recovering HMs from MSWI FA and the difficulties and solutions in the process of technical development were studied. Evaluation of each process has also been done to determine the best HM recycling method and future challenges. Results showed that while bioleaching had minimal environmental impact, the process was time-consuming. TS and CE were the most mature technologies, but the former process was not cost-effective. Overall, it has the greatest economic potential to recover metals by CE with scrubber liquid produced by a wet air pollution control system. An electrochemical process or solvent extraction could then be applied to recover HMs from the enriched leachate. Ongoing development of TS and bioleaching technologies could reduce the treatment cost or time.
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Affiliation(s)
- Huan Wang
- Department of Environmental Engineering, School of Environment & Natural Resources, Renmin University of China, Beijing, People's Republic of China
| | - Fenfen Zhu
- Department of Environmental Engineering, School of Environment & Natural Resources, Renmin University of China, Beijing, People's Republic of China
| | - Xiaoyan Liu
- Department of Environmental Engineering, School of Environment & Natural Resources, Renmin University of China, Beijing, People's Republic of China
| | - Meiling Han
- Department of Environmental Engineering, School of Environment & Natural Resources, Renmin University of China, Beijing, People's Republic of China
| | - Rongyan Zhang
- Department of Environmental Engineering, School of Environment & Natural Resources, Renmin University of China, Beijing, People's Republic of China
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12
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Patel F, Lakshmi B. Bioleaching of copper and nickel from mobile phone printed circuit board using Aspergillus fumigatus A2DS. Braz J Microbiol 2021; 52:1475-1487. [PMID: 34146301 PMCID: PMC8324663 DOI: 10.1007/s42770-021-00526-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 05/11/2021] [Indexed: 11/28/2022] Open
Abstract
The recovery of metals from electronic waste was investigated by using fungal strain Aspergillus fumigatus A2DS, isolated from the mining industry wastewater. Fifty-seven percent of copper and 32% of nickel were leached (analyzed by Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-OES)) by the organism after one-step leaching at a temperature of 30 °C (shaking condition for 7 days). Maximum % of copper and nickel were obtained at a pH of 6 (58.7% Cu and 32% Ni), the temperature of 40 °C (61.8% Cu and 27.07% Ni), a pulp density of 0.5% (62% Cu and 42.37% Ni), and inoculums of 1% (58% Cu and 32.29% Ni). The XRD pattern of PCB showed 77.6% of copper containing compounds. XRD analysis of the leachate residue showed only 23.2% Euchorite (ASCu2H7O8) and 9.4% other copper containing compounds, indicating the leaching property of the fungus. HPLC analysis of the spent medium showed the presence of different acids like citric, succinic, and fumaric acid. The FTIR spectrum showed a decrease in carboxylic stretching in the leachate produced after bioleaching using spent medium. ICPOES of the leachate obtained using spent medium showed that 61% of the copper and 35% of nickel were leached out after seven days of incubation at shaking condition and 57% of copper and 32.8% of nickel at static condition confirming acidolysis property of the strain. A. fumigatus A2DS metal absorption and adsorption ability were observed using transmission electron microscopy (TEM) and scanning electron microscopy energy dispersive X-ray (SEM-EDX) respectively. The results thus indicate that bioleaching of Cu and Ni is bioleached by A. fumigatus A2DS.
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Affiliation(s)
- Falguni Patel
- Department of Microbiology and Biotechnology, SMMPISR, Kadi Sarva Vishwavidyalaya, Gandhinagar, Gujarat, 382015, India
| | - B Lakshmi
- Department of Microbiology and Biotechnology, SMMPISR, Kadi Sarva Vishwavidyalaya, Gandhinagar, Gujarat, 382015, India.
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Li J, Xu T, Liu J, Wen J, Gong S. Bioleaching metals from waste electrical and electronic equipment (WEEE) by Aspergillus niger: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:44622-44637. [PMID: 34215982 DOI: 10.1007/s11356-021-15074-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 06/18/2021] [Indexed: 06/13/2023]
Abstract
In the twenty-first century, the increasing demand for electrical and electronic equipment (EEE) has caused its quick update and the shortening of its service life span. As a consequence, a large number of waste electrical and electronic equipment (WEEE) needs to be processed and recycled. As an environmentally friendly method, biometallurgy has received extensive attention in the disposal of WEEE in recent years. Aspergillus niger is an acid-producing fungus with a potential applicability to improve metals' recycling efficiency. This review article describes the latest statistical status of WEEE and presents the latest progress of various metallurgical methods involved in WEEE recycling for metal recovery. Moreover, based on the summary and comparison towards studies have been reported for bioleaching metals from WEEE by A. niger, the bioleaching mechanisms and the bioleaching methods are explained, as well as the effects of process parameters on the performance of the bioleaching process are also discussed. Some insights and perspectives are provided for A. niger to be applied to industrial processing scale.
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Affiliation(s)
- Jingying Li
- College of Environment and Safety Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China.
| | - Tong Xu
- College of Environment and Safety Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China
| | - Jinyuan Liu
- College of Environment and Safety Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China
| | - Jiangxian Wen
- College of Environment and Safety Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China
| | - Shuli Gong
- College of Environment and Safety Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China
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Keshavarz S, Faraji F, Rashchi F, Mokmeli M. Bioleaching of manganese from a low-grade pyrolusite ore using Aspergillus niger: Process optimization and kinetic studies. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 285:112153. [PMID: 33607567 DOI: 10.1016/j.jenvman.2021.112153] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 12/29/2020] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
Low-grade metal resources generated during different mineral processing activities are increasing while there are not many economic and environmentally friendly techniques to manage them. There is no viable technique for the manganese extraction from low-grade ores as the conventional procedures are costly and environmentally unfriendly. In this research, the D-optimal response surface methodology has been used to optimize the bioleaching parameters. Varied contact methods (one-step, two-step, and spent medium), nutrition sources (sucrose and glucose), and pulp densities (1 g.L-1 to 10 g.L-1) were used in different experiments having been done in 30 days using Aspergillus niger. A maximum recovery of over 80% of Mn was achieved based on the acidolysis, complexolysis, and redoxolysis leaching of the organic acids produced by the fungi under the optimum condition; a two-step approach, in a glucose medium, and with a pulp density of 1 g.L-1. A kinetic study was also performed and revealed that the leaching mechanism was a mixed one which consisted of two stages (diffusion through the liquid film and a chemical reaction) for the first 12 day period, and a mechanism of diffusion through the product layer for the rest of the experiment.
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Affiliation(s)
- Sahar Keshavarz
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, P.O. Box 11155/4563, Iran
| | - Fariborz Faraji
- The Robert M. Buchan Department of Mining, Queen's University, ON, Kingston, K7L 3N6, Canada
| | - Fereshteh Rashchi
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, P.O. Box 11155/4563, Iran.
| | - Mohammad Mokmeli
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, P.O. Box 11155/4563, Iran
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Abstract
Incineration has gained popularity over landfill as a key solution for the reduction of massively increasing volumes of municipal solid waste (MSW) generation worldwide and in particular China. However, it is not the end solution. The disposal of the incineration residues, which are enriched with a wide range of heavy metals and soluble salts, has become a challenge for the environmental managers. The aim of this study was to review the increasing urbanization and its repercussion on waste generation in China; waste management options were compared for possible environmentally friendly considerations. Treatment techniques of incineration fly ash were discussed to determine the effectiveness of obtaining environmentally stable material, and, finally, possible applications of incineration fly ash for utilization were discussed based on identifying the processing suitability, performance and environmental impact of incineration fly ash for its applications.
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Srichandan H, Mohapatra RK, Singh PK, Mishra S, Parhi PK, Naik K. Column bioleaching applications, process development, mechanism, parametric effect and modelling: A review. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.07.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Advances in Methods for Recovery of Ferrous, Alumina, and Silica Nanoparticles from Fly Ash Waste. CERAMICS-SWITZERLAND 2020. [DOI: 10.3390/ceramics3030034] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Fly ash or coal fly ash causes major global pollution in the form of solid waste and is classified as a “hazardous waste”, which is a by-product of thermal power plants produced during electricity production. Si, Al, Fe Ca, and Mg alone form more than 85% of the chemical compounds and glasses of most fly ashes. Fly ash has a chemical composition of 70–90%, as well as glasses of ferrous, alumina, silica, and CaO. Therefore, fly ash could act as a reliable and alternative source for ferrous, alumina, and silica. The ferrous fractions can be recovered by a simple magnetic separation method, while alumina and silica can be extracted by chemical or biological approaches. Alumina extraction is possible using both alkali- and acid-based methods, while silica is extracted by strong alkali, such as NaOH. Chemical extraction has a higher yield than the biological approaches, but the bio-based approaches are more environmentally friendly. Fly ash can also be used for the synthesis of zeolites by NaOH treatment of variable types, as fly ash is rich in alumino-silicates. The present review work deals with the recent advances in the field of the recovery and synthesis of ferrous, alumina, and silica micro and nanoparticles from fly ash.
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Biotechnology for Metal Recovery from End-of-Life Printed Circuit Boards with Aspergillus niger. SUSTAINABILITY 2020. [DOI: 10.3390/su12166482] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The growing production and use of electric and electronic components has led to higher rates of metal consumption and waste generation. To solve this double criticality, the old linear management method (in which a product becomes waste to dispose), has evolved towards a circular approach. Printed circuit boards (PCBs) are the brains of many electronic devices. At the end of their life, this equipment represents a valuable scrap for the content of base metals such as Cu and Zn (25 and 2 wt %, respectively) and precious metals such as Au, Ag, and Pd (250, 1000, and 110 ppm, respectively). Recently, biotechnological approaches have gained increasing prominence in PCB exploitation since they can be more cost-efficient and environmentally friendly than the chemical techniques. In this context, the present paper describes a sustainable process which uses the fungal strain Aspergillus niger for Cu and Zn extraction from PCBs. The best conditions identified were PCB addition after 14 days, Fe3+ as oxidant agent, and a pulp density of 2.5% (w/v). Extraction efficiencies of 60% and 40% for Cu and Zn, respectively, were achieved after 21 days of fermentation. The ecodesign of the process was further enhanced by using milk whey as substrate for the fungal growth and the consequent citric acid production, which was selected as a bioleaching agent.
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Bioleaching of Phosphate Minerals Using Aspergillus niger: Recovery of Copper and Rare Earth Elements. METALS 2020. [DOI: 10.3390/met10070978] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Rare earth elements (REE) are essential in high-technology and environmental applications, where their importance and demand have grown enormously over the past decades. Many lanthanide and actinide minerals in nature are phosphates. Minerals like monazite occur in small concentrations in common rocks that resist weathering. Turquoise is a hydrous phosphate of copper and aluminum scarcely studied as copper ore. Phosphate-solubilizing microorganisms are able to transform insoluble phosphate into a more soluble form which directly and/or indirectly contributes to their metabolism. In this study, bioleaching of heavy metals from phosphate minerals by using the fungus Aspergillus niger was investigated. Bioleaching experiments were examined in batch cultures with different mineral phosphates: aluminum phosphate (commercial), turquoise, and monazite (natural minerals). The experiments were performed at 1% pulp density and the phosphorous leaching yield was aluminum phosphate > turquoise > monazite. Bioleaching experiments with turquoise showed that A. niger was able to reach 8.81 mg/l of copper in the aqueous phase. Furthermore, the fungus dissolved the aluminum cerium phosphate hydroxide in monazite, reaching up to 1.37 mg/L of REE when the fungus was grown with the mineral as the sole phosphorous source. Furthermore, A. niger is involved in the formation of secondary minerals, such as copper and REE oxalates.
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Gomes HI, Funari V, Ferrari R. Bioleaching for resource recovery from low-grade wastes like fly and bottom ashes from municipal incinerators: A SWOT analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 715:136945. [PMID: 32007897 DOI: 10.1016/j.scitotenv.2020.136945] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 01/23/2020] [Accepted: 01/24/2020] [Indexed: 06/10/2023]
Abstract
Bioleaching (or microbial leaching) is a biohydrometallurgical technology that can be applied for metal recovery from anthropogenic waste streams. In particular, fly ashes and bottom ashes of municipal solid waste incineration (MSWI) can be used as a target material for biomining. Globally, approximately 46 million tonnes of MSWI ashes are produced annually. Currently landfilled or used as aggregate, these contain large amounts of marketable metals, equivalent to low-grade ores. There is opportunity to recover critical materials as the circular economy demands, using mesophile, moderately thermophile, and extremophile microorganisms for bioleaching. A Strengths, Weaknesses, Opportunities and Threats (SWOT) analysis was developed to assess the potential of this biotechnology to recover critical metals from MSWI wastes. Bioleaching has potential as a sustainable technology for resource recovery and enhanced waste management. However, stakeholders can only reap the full benefits of bioleaching by addressing both the technical engineering challenges and regulatory requirements needed to realise and integrated approach to resource use.
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Affiliation(s)
- Helena I Gomes
- Food, Water, Waste Research Group, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK.
| | - Valerio Funari
- ISMAR-CNR, National Research Council, via P. Gobetti, 101, 40129 Bologna, Italy; Biotechnology Division, Stazione Zoologica Anton Dohrn SZN, Villa Comunale I, Napoli, Italy
| | - Rebecca Ferrari
- Food, Water, Waste Research Group, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK
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Rivas-Castillo AM, Rojas-Avelizapa NG. Enfoques microbiológicos para el tratamiento de catalizadores agotados. TIP REVISTA ESPECIALIZADA EN CIENCIAS QUÍMICO-BIOLÓGICAS 2020. [DOI: 10.22201/fesz.23958723e.2020.0.214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Los catalizadores, homogéneos o heterogéneos, son ampliamente utilizados para una gran variedad de procesos industriales, con el fin de producir combustibles limpios y muchos otros productos valiosos, siendo los catalizadores agotados provenientes del hidroprocesamiento los mayores residuos sólidos de la industria de la refinería y la contribución principal a la generación de catalizadores agotados. Debido a su naturaleza peligrosa, el tratamiento y la recuperación de metales de este tipo de residuos han ganado cada vez más importancia, debido al agotamiento de los recursos naturales y a la contaminación ambiental. Aunque ya existen técnicas disponibles para estos fines, éstas generan grandes volúmenes de desechos potencialmente peligrosos y producen emisiones de gases nocivos. Por lo tanto, las técnicas biotecnológicas pueden representar una alternativa promisoria para el biotratamiento y la recuperación de metales contenidos en los catalizadores agotados. Con este fin, se han analizado diversos microorganismos, que comprenden bacterias, arqueobacterias y hongos, capacitados para facilitar la eliminación de losmetales contenidos en estoscatalizadores. En estarevisión se presenta un amplio escenario sobre los avances con respecto al manejo de los catalizadores agotados y su tratamiento tradicional, seguido de una descripción detallada sobre los enfoques microbiológicos reportados hasta la actualidad.
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Ferrier J, Yang Y, Csetenyi L, Gadd GM. Colonization, penetration and transformation of manganese oxide nodules by Aspergillus niger. Environ Microbiol 2019; 21:1821-1832. [PMID: 30884070 PMCID: PMC6849720 DOI: 10.1111/1462-2920.14591] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 03/13/2019] [Indexed: 11/28/2022]
Abstract
In this study, the ability of the geoactive fungus Aspergillus niger to colonize and transform manganese nodules from the Clarion‐Clipperton Zone in both solid and liquid media was investigated. Aspergillusniger was able to colonize and penetrate manganese nodules embedded in solid medium and effect extensive transformation of the mineral in both fragmented and powder forms, precipitating manganese and calcium oxalates. Transformation of manganese nodule powder also occurred in a liquid medium in which A. niger was able to remove the fine particles from suspension which were accumulated within the central region of the resulting mycelial pellets and transformed into manganese oxalate dihydrate (lindbergite) and calcium oxalate dihydrate (weddellite). These findings contribute to an understanding of environmental processes involving insoluble manganese oxides, with practical relevance to chemoorganotrophic mineral bioprocessing applications, and, to the best of our knowledge, represent the first demonstration of fundamental direct and indirect interactions between geoactive fungi and manganese nodules.
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Affiliation(s)
- John Ferrier
- Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee, DD1 5EH, Scotland, UK
| | - Yuyi Yang
- Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee, DD1 5EH, Scotland, UK
| | - Laszlo Csetenyi
- Concrete Technology Group, Department of Civil Engineering, University of Dundee, Dundee, DD1 4HN, Scotland, UK
| | - Geoffrey Michael Gadd
- Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee, DD1 5EH, Scotland, UK
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Faraji F, Golmohammadzadeh R, Rashchi F, Alimardani N. Fungal bioleaching of WPCBs using Aspergillus niger: Observation, optimization and kinetics. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 217:775-787. [PMID: 29660703 DOI: 10.1016/j.jenvman.2018.04.043] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 03/26/2018] [Accepted: 04/08/2018] [Indexed: 06/08/2023]
Abstract
In this study, Aspergillus niger (A. niger) as an environmentally friendly agent for fungal bioleaching of waste printed circuit boards (WPCBs) was employed. D-optimal response surface methodology (RSM) was utilized for optimization of the bioleaching parameters including bioleaching method (one step, two step and spent medium) and pulp densities (0.5 g L-1 to 20 g L-1) to maximize the recovery of Zn, Ni and Cu from WPCBs. According to the high performance liquid chromatography analysis, citric, oxalic, malic and gluconic acids were the most abundant organic acids produced by A.niger in 21 days experiments. Maximum recoveries of 98.57% of Zn, 43.95% of Ni and 64.03% of Cu were achieved based on acidolysis and complexolysis dissolution mechanisms of organic acids. Based on the kinetic studies, the rate controlling mechanism for Zn dissolution at one step approach was found to be diffusion through liquid film, while it was found to be mixed control for both two step and spent medium. Furthermore, rate of Cu dissolution which is controlled by diffusion in one step and two step approaches, detected to be controlled by chemical reaction at spent medium. It was shown that for Ni, the rate is controlled by chemical reaction for all the methods studied. Eventually, it was understood that A. niger is capable of leaching 100% of Zn, 80.39% of Ni and 85.88% of Cu in 30 days.
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Affiliation(s)
- Fariborz Faraji
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Rabeeh Golmohammadzadeh
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran; Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Fereshteh Rashchi
- School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran.
| | - Navid Alimardani
- Department of Materials Engineering, Islamic Azad University, South Tehran Branch, Tehran, Iran
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Kadam D, Palamthodi S, Lele SS. LC-ESI-Q-TOF-MS/MS profiling and antioxidant activity of phenolics from L. Sativum seedcake. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2018; 55:1154-1163. [PMID: 29487458 PMCID: PMC5821675 DOI: 10.1007/s13197-017-3031-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 12/28/2017] [Accepted: 12/29/2017] [Indexed: 01/03/2023]
Abstract
Lepidium sativum is widely used as a culinary and medicinal herb and is claimed to cure many diseases. In this study, an attempt was made to investigate the biochemical composition and functional properties of L. sativum ethanolic extract. The extract contained a total phenolic content of 11.03 ± 0.75 (mg GAE/g dw plant material) and a flavonoid content of 4.79 ± 0.24 (mg QE/100 g dw plant material). Further, the extract was characterized by LC-ESI-Q-TOF-MS/MS profiling and the results showed that the ethanolic fraction contains many important phenolics such as Kaempferol, Coumaroylquinic acid, p-Coumaroyl glycolic acid, Caffeic acid. The identified compounds are known for their biological properties and therefore, the functional properties of the extract as a whole were also studied. The extract showed significant antioxidant activity (IC50 values) 162.4 ± 2.3, 35.29 ± 1.02, 187.12 ± 3.4 and 119.32 ± 1.5 μg/ml in terms of DPPH, ABTS, Superoxide scavenging activity and metal chelating property respectively. Further, the extract showed IC50 values, 73.72 ± 1.23 and 121.78 ± 1.03 μg/ml in HRBC membrane stabilization ability and protein denaturation inhibition capacity respectively, which in turn is a measure of its anti-inflammatory activity. The results of the study are promising and serve basis for further investigation into the plant and possible consideration for use in nutraceuticals and functional foods.
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Affiliation(s)
- Deepak Kadam
- Department of Food Engineering and Technology, Institute of Chemical Technology, Matunga, Mumbai, 400019 India
| | - Shanooba Palamthodi
- Department of Food Engineering and Technology, Institute of Chemical Technology, Matunga, Mumbai, 400019 India
| | - S. S. Lele
- Department of Food Engineering and Technology, Institute of Chemical Technology, Matunga, Mumbai, 400019 India
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Ertit Taştan B. Clean up fly ash from coal burning plants by new isolated fungi Fusarium oxysporum and Penicillium glabrum. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 200:46-52. [PMID: 28554126 DOI: 10.1016/j.jenvman.2017.05.062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 04/24/2017] [Accepted: 05/20/2017] [Indexed: 06/07/2023]
Abstract
In Turkey approximately 45 million tons of coals are burned in a year and 19.3 million tons of fly ash have emerged. The bioremediation of heavy metals or different elements from fly ash makes them bio-available. However, in previous studies, requiring of long operational time and failing to show tolerance to high pulp densities of fly ash of selected fungal species makes them impractical. In this work, bioremediation of fly ash by new isolated fungi Fusarium oxysporum and Penicillium glabrum were investigated in one step and two step bioremediation process. Ca, Si, Fe and S were found to be considerable amount in studied fly ashes by ED-XRF element analysis. The bioremediation yields of Mo (100%), S (64.36%) Ni (50%) and Cu (33.33%) by F. oxysporum were high. The remediated elements by P. glabrum in fly ash were Mo (100%), S (57.43%), Ni (25%), Si (24.66%), V (12.5%), Ti (5%) and Sr (3.2%). The isolation of high fly ash resistant fungi and reduction of the bioremediation time will allow the practical applications of the bioremediation technology when it is scaled up.
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Affiliation(s)
- Burcu Ertit Taştan
- Polatlı Faculty of Science & Arts, Gazi University, 06900, Polatlı, Ankara, Turkey; Health Services Vocational School, Gazi University, 06830, Gölbaşı, Ankara, Turkey; Life Sciences Application and Research Center, Gazi University, 06830, Gölbaşı, Ankara, Turkey.
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Rasoulnia P, Mousavi SM. Maximization of organic acids production by Aspergillus niger in a bubble column bioreactor for V and Ni recovery enhancement from power plant residual ash in spent-medium bioleaching experiments. BIORESOURCE TECHNOLOGY 2016; 216:729-736. [PMID: 27295250 DOI: 10.1016/j.biortech.2016.05.114] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 05/26/2016] [Accepted: 05/27/2016] [Indexed: 06/06/2023]
Abstract
Spent-medium bioleaching of V and Ni from a power plant residual ash (PPR ash) was conducted using organic acids produced by Aspergillus niger. The production of organic acids in a bubble column bioreactor was optimized through selecting three most influencing factors. Under optimum condition of aeration rate of 762.5(ml/min), sucrose concentration of 101.9(g/l) and inoculum size of 40(ml/l), respectively 17,185, 4539, 1042 and 502(ppm) of oxalic, gluconic, citric and malic acids were produced. Leaching experiments were carried out using biogenic produced organic acids under leaching environment temperature of 60°C and rotary shaking speed of 135rpm, with various pulp densities of 1, 2, 3, 5, 7 and 9(%w/v). The results showed that biogenic produced organic acids leached V much more efficiently than Ni so that even at high pulp density of 9(%w/v), 83% of V was recovered while Ni recovery yield was 30%.
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Affiliation(s)
- P Rasoulnia
- Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran
| | - S M Mousavi
- Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran.
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Jadhav U, Su C, Hocheng H. Leaching of metals from printed circuit board powder by an Aspergillus niger culture supernatant and hydrogen peroxide. RSC Adv 2016. [DOI: 10.1039/c6ra04169h] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Removal of chemical coating of PCB powder using 0.1 M sodium hydroxide solution.
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Affiliation(s)
- U. Jadhav
- School of Civil and Environmental Engineering
- Nanyang Technological University
- Singapore 639798
| | - C. Su
- Department of Power Mechanical Engineering
- National Tsing Hua University
- Hsinchu
- Republic of China
| | - H. Hocheng
- Department of Power Mechanical Engineering
- National Tsing Hua University
- Hsinchu
- Republic of China
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Analysis of Metal Bioleaching from Thermal Power Plant Fly Ash by Aspergillus niger 34770 Culture Supernatant and Reduction of Phytotoxicity During the Process. Appl Biochem Biotechnol 2014; 175:870-81. [DOI: 10.1007/s12010-014-1323-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 10/15/2014] [Indexed: 10/24/2022]
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