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Dey P, Lincy KB, Osborne JW. An insight on the plausible biological and non-biological detoxification of heavy metals in tannery waste: A comprehensive review. ENVIRONMENTAL RESEARCH 2024:119451. [PMID: 38906443 DOI: 10.1016/j.envres.2024.119451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 05/20/2024] [Accepted: 06/18/2024] [Indexed: 06/23/2024]
Abstract
A key challenge for the tannery industries is the volume of tannery waste water (TWW) generated during the processing of leather, releasing various forms of toxic heavy metals resulting in uncontrolled discharge of tannery waste (TW) into the environment leading to pollution. The pollutants in TW includes heavy metals such as chromium (Cr), cadmium (Cd), lead (Pb) etc, when discharged above the permissible limit causes ill effects on humans. Therefore, several researchers have reported the application of biological and non-biological methods for the removal of pollutants in TW. This review provides insights on the global scenario of tannery industries and the harmful effects of heavy metal generated by tannery industry on micro and macroorganisms of the various ecological niches. It also provides information on the process, advantages and disadvantages of non-biological methods such as electrochemical oxidation, advanced oxidation processes, photon assisted catalytic remediation, adsorption and membrane technology. The various biological methods emphasised includes strategies such as constructed wetland, vermitechnology, phytoremediation, bioaugmentation, quorum sensing and biofilm in the remediation of heavy metals from tannery wastewater (TWW) with special emphasize on chromium.
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Affiliation(s)
- Parry Dey
- School of Bio Sciences & Technology, Vellore Institute of Technology, Vellore, 632014, Tamil Nadu, India
| | - Kirubhadharsini B Lincy
- VIT school of Agricultural Innovations and Advanced Learning (VAIAL) Vellore Institute of Technology, Vellore, 632014, Tamil Nadu, India.
| | - Jabez W Osborne
- School of Bio Sciences & Technology, Vellore Institute of Technology, Vellore, 632014, Tamil Nadu, India.
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Akansha J, Thakur S, Chaithanya MS, Gupta BS, Das S, Das B, Rajasekar N, Priya K. Technological and economic analysis of electrokinetic remediation of contaminated soil: A global perspective and its application in Indian scenario. Heliyon 2024; 10:e24293. [PMID: 38304840 PMCID: PMC10831613 DOI: 10.1016/j.heliyon.2024.e24293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 01/05/2024] [Accepted: 01/05/2024] [Indexed: 02/03/2024] Open
Abstract
Globally million hectares of land annually is getting contaminated by heavy metalloids like As, Cd, Cr, Hg, Pb, Co, Cu, Ni, Zn, and Se, with current concentrations in soil above geo-baseline or regulatory standards. The heavy metals are highly toxic, mobile, and persistent and hence require immediate and effective mitigation. There are many available remediation techniques like surface capping, encapsulation, landfilling, soil flushing, soil washing, electrokinetic extraction, stabilization, solidification, vitrification, phytoremediation, and bioremediation which have been evolved to clean up heavy metal-contaminated sites. Nevertheless, all of the technologies have some applicability and limitations making the soil remediation initiative unsustainable. Among the available technologies, electrokinetic remediation (EKR) has been comparatively recognized to mitigate contaminated sites via both in-situ and ex-situ approaches due to its efficiency, suitability for use in low permeability soil, and requirement of low potential gradient. The work critically analyzes the EKR concerning techno, economic, and sustainability aspect for evaluating its application on various substrates and environmental conditions. The current soil contamination status in India is presented and the application of EKR for the heavy metal remediation from soil has been evaluated. The present work summaries a comprehensive and exhaustive review on EKR technology proving its effectiveness for a country like India where the huge amount of waste generated could not be treated due to lack of infrastructure, technology, and economic constraints.
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Affiliation(s)
- J. Akansha
- Department of Environment and Water Resources Engineering, School of Civil Engineering (SCE), Vellore Institute of Technology, Katpadi, Vellore, Tamil Nadu, 632014, India
| | - Somil Thakur
- Department of Environment and Water Resources Engineering, School of Civil Engineering (SCE), Vellore Institute of Technology, Katpadi, Vellore, Tamil Nadu, 632014, India
| | - M Sai Chaithanya
- Department of Environment and Water Resources Engineering, School of Civil Engineering (SCE), Vellore Institute of Technology, Katpadi, Vellore, Tamil Nadu, 632014, India
| | - Bhaskar Sen Gupta
- School of Energy, Geoscience, Infrastructure and Society, Heriot-Watt University, Edinburgh Campus, Edinburgh, EH14 4AS, Scotland, UK
| | - Sovik Das
- Department of Civil Engineering, Indian Institute of Technology Delhi, New Delhi, 110016, India
| | - Bhaskar Das
- Department of Environment and Water Resources Engineering, School of Civil Engineering (SCE), Vellore Institute of Technology, Katpadi, Vellore, Tamil Nadu, 632014, India
| | - N. Rajasekar
- Department of Energy and Power Electronics, School of Electrical Engineering, Vellore Institute of Technology, Katpadi, Vellore, Tamil Nadu, 632014, India
| | - K. Priya
- Department of Energy and Power Electronics, School of Electrical Engineering, Vellore Institute of Technology, Katpadi, Vellore, Tamil Nadu, 632014, India
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Zhang L, Hu Y, Chen Y, Qi D, Cai B, Zhao Y, Li Z, Wang Y, Nie Z, Xie J, Wang W. Cadmium-tolerant Bacillus cereus 2-7 alleviates the phytotoxicity of cadmium exposure in banana plantlets. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 903:166645. [PMID: 37657542 DOI: 10.1016/j.scitotenv.2023.166645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 08/05/2023] [Accepted: 08/26/2023] [Indexed: 09/03/2023]
Abstract
Bananas are the world's important fruit and staple crop in the developing countries. Cadmium (Cd) contamination in soils results in the decrease of crop yield and food safety. Bioremediation is an environmental-friendly and effective measure using Cd-tolerant plant growth promoting rhizobacteria (PGPR). In our study, a Cd-resistant PGPR Bacillus cereus 2-7 was isolated and identified from a discarded gold mine. It could produce multiple plant growth promoting biomolecules such as siderophores, indole-3-acetic acid (IAA), 1-aminocyclopropane-1-carboxylate (ACC)-deaminase and phosphatase. The extracellular accumulation was a main manner of Cd removal. Surplus Cd induced the expression of Cd resistance/transport genes of B. cereus 2-7 to maintain the intracellular Cd homeostasis. The pot experiment showed that Cd contents decreased by 50.31 % in soil, 45.43 % in roots, 56.42 % in stems and 79.69 % in leaves after the strain 2-7 inoculation for 40 d. Bacterial inoculation alleviated the Cd-induced oxidative stress to banana plantlets, supporting by the increase of chlorophyll contents, plant height and total protein contents. The Cd remediation mechanism revealed that B. cereus 2-7 could remodel the rhizosphere bacterial community structure and improve soil enzyme activities to enhance the immobilization of Cd. Our study provides a Cd-bioremediation strategy using Cd-resistant PGPR in tropical and subtropical area.
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Affiliation(s)
- Lu Zhang
- National Key Laboratory of Tropical Crop Breeding, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China; Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, Hainan 571158, China
| | - Yulin Hu
- South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, Guangzhou 524091, China
| | - Yufeng Chen
- National Key Laboratory of Tropical Crop Breeding, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
| | - Dengfeng Qi
- National Key Laboratory of Tropical Crop Breeding, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
| | - Bingyu Cai
- National Key Laboratory of Tropical Crop Breeding, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
| | - Yankun Zhao
- National Key Laboratory of Tropical Crop Breeding, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
| | - Zhuoyang Li
- National Key Laboratory of Tropical Crop Breeding, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
| | - Yong Wang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, Hainan 571158, China
| | - Zongyu Nie
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou, Hainan 571158, China
| | - Jianghui Xie
- National Key Laboratory of Tropical Crop Breeding, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
| | - Wei Wang
- National Key Laboratory of Tropical Crop Breeding, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China.
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Fang LR, Yang XC, Wu CY, Sun K, Megharaj M, He W. Endophytic Bacillus sp. R1 and Its Roles in Assisting Phytoremediation and Alleviating the Toxicity of Aluminum Combined Phenanthrene Contaminations in Brassica napus. Curr Microbiol 2023; 80:397. [PMID: 37907801 DOI: 10.1007/s00284-023-03493-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 09/21/2023] [Indexed: 11/02/2023]
Abstract
The release of organic and inorganic contaminants into soil from industry, agriculture, and urbanization has become a major issue of international concern, particularly the heavy metals such as aluminum (Al) and the chemical phenanthrene (PHE). Due to their potential toxicity and non-biodegrade in the environment, efficient remediation methods are urgently needed. Recently, research has comprehensively discussed using plants and their endophytes in bioremediation efforts. Endophytic Bacillus sp. R1, isolated from Brassica napus permanently contaminated with Al and PHE, has growth-promoting properties and can efficiently detoxify these contaminants. The pot experiment indicated that compared to the Al combined PHE contaminated soil alone treatment, the R1 treatment led to increased Al accumulation in canola roots across different levels of PHE, Al, and combined PHE and Al contamination. However, Al accumulation in canola shoots and seeds remained unchanged for all treatments. Moreover, PHE in canola roots and shoots was decreased by R1 inoculation and thereby reducing 26.12-60.61% PHE translocated into canola seeds. Additionally, R1 inoculation significantly increased the proportion of extractable Al and, decreased the proportion of acid-soluble inorganic Al and humic-acid Al, but did not affect the concentration of organically complexed Al. In summary, endophyte R1 can degrade PHE, improve canola roots' Al uptake by increasing soil available Al, and scavenge the reactive oxygen species through production of antioxidant enzymes to help alleviate the toxicity of canola co-contaminated with aluminum and phenanthrene.
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Affiliation(s)
- Li-Rong Fang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Wenyuan Street, NanjingJiangsu Province, 210023, China
| | - Xue-Cheng Yang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Wenyuan Street, NanjingJiangsu Province, 210023, China
| | - Chun-Ya Wu
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Wenyuan Street, NanjingJiangsu Province, 210023, China
| | - Kai Sun
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Wenyuan Street, NanjingJiangsu Province, 210023, China
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle (UoN), Callaghan, NSW, 2308, Australia
| | - Wei He
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Wenyuan Street, NanjingJiangsu Province, 210023, China.
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Akoijam N, Joshi SR. Bioprospecting acid- and arsenic-tolerant plant growth-promoting rhizobacteria for mitigation of arsenic toxicity in acidic agricultural soils. Arch Microbiol 2023; 205:229. [PMID: 37160492 DOI: 10.1007/s00203-023-03567-z] [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: 02/06/2023] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 05/11/2023]
Abstract
Widespread use of chemical fertilizers and falling productivity in traditional agricultural practices has led to the biodiversity hotspot of North-Eastern region of India to face imminent threat to soil nutrients and biodiversity. The present work aimed to isolate rhizobacteria from Oryza sativa L. to evaluate their plant growth-promoting traits like indole, ammonia, siderophore production, and phosphate solubilization followed by in vitro plant growth promotion and anti-fungal assessment against Curvularia oryzae. Moreover, presence of heavy metals such as arsenic in chemical fertilizers and in groundwater contributes to arsenic contamination of agricultural soil. Taking this into consideration for the present study, the background metal content of the bulk soil, roots and grains of rice was measured. Arsenic tolerance of the rhizobacterial isolates was assessed using different concentrations of arsenite- and arsenate-supplemented media. 16S rRNA gene sequencing and phylogenetic tree analysis identified the isolates as Bacillus paramycoides, B. albus, B. altitudinis, B. koreensis, B. megaterium, B. wiedmannii, B. paramycoides, Chryseobacterium gleum, Stenotrophomonas maltophilia and Pseudomonas shirazica. Considering the acidic nature of the paddy growing soil, the growth kinetics of the isolates were monitored in acid and arsenic-supplemented conditions for 48 h of growth. Few isolates showed potent anti-fungal activity against the late blight phytopathogen, Curvularia oryzae MTCC 2605, apart from being potential growth promoters. The findings open vistas for the mass production of the characterized PGP rhizobacteria for their application in rehabilitation of the degrading arsenic contaminated paddy fields.
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Affiliation(s)
- Nirmala Akoijam
- Microbiology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, 793 022, India
| | - Santa Ram Joshi
- Microbiology Laboratory, Department of Biotechnology and Bioinformatics, North-Eastern Hill University, Shillong, 793 022, India.
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Zhang J, Fan X, Wang X, Tang Y, Zhang H, Yuan Z, Zhou J, Han Y, Li T. Bioremediation of a saline-alkali soil polluted with Zn using ryegrass associated with Fusariumincarnatum. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 312:119929. [PMID: 35977634 DOI: 10.1016/j.envpol.2022.119929] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/29/2022] [Accepted: 08/06/2022] [Indexed: 06/15/2023]
Abstract
Biotechnological strategies have become effective in the remediation of polluted soils as they are cost-effective and do not present a risk of secondary pollution. However, using a single bioremediation technique (microorganism or plant) is not suitable for achieving a high remediation rate of polluted saline-alkali soils with heavy metals. Therefore, the present study aims to assess the effects and mechanisms of combined ryegrass and Fusarium incarnatum on the zinc (Zn)-polluted saline-alkali soil over 45 days. According to the obtained results, the combined Fusarium incarnatum-ryegrass showed the highest remediation rate of 49.35% after 45 days, resulting in a significantly lower soil Zn concentration than that observed in the control group. In addition, the inoculation of Fusarium incarnatum showed a positive effect on the soil EPS secretion. The soil protein contents ranged from 0.035 to 0.055 mg/kg, while the soil polysaccharide contents increased from 0.25 to 0.61 mg/g. The soil microbial flora and ryegrass showed resistance to saline and alkaline stresses through the secretion of extracellular polysaccharides. The three-dimensional fluorescence spectrum (3D-EEM) confirmed that EPS in the soil was mainly a fulvic acid-like substance. The fluorescein diacetate (FDA) hydrolase activity in the saline-alkali soil was first increased due to the effect of Fusarium incarnatum and then decreased to a minimum value of 96 μg/(g·h). In addition, the Fusarium incarnatum inoculation improved the diversity and richness of soil fungi. Although the Fusarium incarnatum inoculation had a slight effect on the germination of ryegrass, it increased the biomass and enrichment coefficient. The results revealed a translocation factor (TF) value of 0.316 at 45 days after ryegrass sowing, showing significant enrichment of the soil Zn heavy metal zinc in the ryegrass roots.
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Affiliation(s)
- Jinxuan Zhang
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Xiaodan Fan
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China; Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin, China; Municipal Experimental Teaching Demonstration Center of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China; Tianjin International Joint Research and Development Center, Tianjin, China.
| | - Xueqi Wang
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Yinbing Tang
- Tianjin Enshui Environmental Protection Technology Co.Ltd., Tianjin, 300381, China
| | - Hao Zhang
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Zhengtong Yuan
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Jiaying Zhou
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Yibo Han
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Teng Li
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
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Sreenadh M, Kumar KR, Nath S. In Vitro Evaluation of Weizmannia coagulans Strain LMG S-31876 Isolated from Fermented Rice for Potential Probiotic Properties, Safety Assessment and Technological Properties. Life (Basel) 2022; 12:life12091388. [PMID: 36143423 PMCID: PMC9504688 DOI: 10.3390/life12091388] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/27/2022] [Accepted: 08/29/2022] [Indexed: 11/25/2022] Open
Abstract
Simple Summary Weizmanniacoagulans strain LMG S-31876, isolated from fermented rice, is Gram-positive bacilli, a spore-forming, motile, and facultative anaerobe, with an optimum temperature requirement of 40 °C. The strain is able to tolerate acidic gastric juice, bile, and pancreatin. It is non-virulent and exhibits sensitivity to most of the tested antibiotics. The strain shows antagonistic activity against pathogenic bacteria. The 16S rDNA gene sequence of W.coagulans strain LMG S-31876 has been submitted to NCBI–GenBank, archiving accession number MZ687045. The strain has also been deposited to BCCM/LMG and MTCC-IDA with reference numbers LMG S-31876 and MTCC 25396, respectively. Abstract Bacillus coagulans, which has been taxonomically reclassified as Weizmannia coagulans, has been the focus of research due to its wide distribution in fermented foods, probiotic properties, and tolerance to extreme environments. The purpose of this study was to characterise putative probiotic bacteria in a fermented rice sample, followed by an in vitro screening of presumptive probiotic properties and a safety assessment to ensure their safety for human consumption. The predominant isolate was Gram-positive, rod-shaped, catalase-positive, spore-forming, motile, and facultatively anaerobic. The biochemical test and 16S rDNA sequencing identify the isolate as Weizmannia coagulans strain LMG S-31876. The strain showed significant viability in acidic gastric juice, pancreatin, and bile. The strain showed tolerance to 5% NaCl, and a low-to-moderate percentage of hydrophobicity and auto-aggregation was recorded. It met all safety criteria, including haemolytic activity, DNase activity, antibiotic sensitivity, and growth inhibition of other bacteria. Evaluation of its technological properties showed positive results for amylolytic and lipolytic activities; however, negative results were obtained for proteolytic activity. It could be concluded from the gathered data that W. coagulans strain LMG S-31876 isolated from fermented rice, might serve as a potential functional probiotic food. However, extended follow-up durations and larger-scale trials by assessing the therapeutic effects in managing various clinical gastrointestinal conditions are required to warranty such effects.
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Affiliation(s)
- Madapati Sreenadh
- Abode Biotec India Private Limited, MLA Colony, Banjara Hills, Hyderabad 500033, Telangana, India
| | - Kallur Ranjith Kumar
- Abode Biotec India Private Limited, MLA Colony, Banjara Hills, Hyderabad 500033, Telangana, India
| | - Soumitra Nath
- Department of Biotechnology, Gurucharan College, Silchar 788004, Assam, India
- Correspondence:
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Pande V, Pandey SC, Sati D, Bhatt P, Samant M. Microbial Interventions in Bioremediation of Heavy Metal Contaminants in Agroecosystem. Front Microbiol 2022; 13:824084. [PMID: 35602036 PMCID: PMC9120775 DOI: 10.3389/fmicb.2022.824084] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 03/31/2022] [Indexed: 01/09/2023] Open
Abstract
Soil naturally comprises heavy metals but due to the rapid industrialization and anthropogenic events such as uncontrolled use of agrochemicals their concentration is heightened up to a large extent across the world. Heavy metals are non-biodegradable and persistent in nature thereby disrupting the environment and causing huge health threats to humans. Exploiting microorganisms for the removal of heavy metal is a promising approach to combat these adverse consequences. The microbial remediation is very crucial to prevent the leaching of heavy metal or mobilization into the ecosystem, as well as to make heavy metal extraction simpler. In this scenario, technological breakthroughs in microbes-based heavy metals have pushed bioremediation as a promising alternative to standard approaches. So, to counteract the deleterious effects of these toxic metals, some microorganisms have evolved different mechanisms of detoxification. This review aims to scrutinize the routes that are responsible for the heavy metal(loid)s contamination of agricultural land, provides a vital assessment of microorganism bioremediation capability. We have summarized various processes of heavy metal bioremediation, such as biosorption, bioleaching, biomineralization, biotransformation, and intracellular accumulation, as well as the use of genetically modified microbes and immobilized microbial cells for heavy metal removal.
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Affiliation(s)
- Veni Pande
- Cell and Molecular Biology Laboratory, Department of Zoology (DST-FIST Sponsored), Soban Singh Jeena University Campus, Almora, India
- Department of Biotechnology, Sir J C Bose Technical Campus, Kumaun University, Bhimtal, India
| | - Satish Chandra Pandey
- Cell and Molecular Biology Laboratory, Department of Zoology (DST-FIST Sponsored), Soban Singh Jeena University Campus, Almora, India
| | - Diksha Sati
- Cell and Molecular Biology Laboratory, Department of Zoology (DST-FIST Sponsored), Soban Singh Jeena University Campus, Almora, India
- Department of Zoology, Kumaun University, Nainital, India
| | - Pankaj Bhatt
- Department of Agricultural and Biological Engineering, PurdueUniversity, West Lafayette, IN, United States
| | - Mukesh Samant
- Cell and Molecular Biology Laboratory, Department of Zoology (DST-FIST Sponsored), Soban Singh Jeena University Campus, Almora, India
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Shahraki A, Mohammadi-Sichani M, Ranjbar M. Identification of lead-resistant rhizobacteria of Carthamus tinctorius and their effects on lead absorption of Sunflower. J Appl Microbiol 2021; 132:3073-3080. [PMID: 34897903 DOI: 10.1111/jam.15410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/08/2021] [Accepted: 12/09/2021] [Indexed: 11/29/2022]
Abstract
AIMS Using rhizobacteria as plant growth-promoting agents for improving heavy-metal phytoremediation processes in contaminated soil has attracted a lot of attention mainly because of their eco-friendliness. The aim of this study was the evaluation of lead phytoremediation by Carthamus tinctorius improved with the isolated and molecularly identified lead-resistant rhizobacteria. METHODS AND RESULTS Rhizobacteria were isolated from C. tinctorius root and was identified using macroscopic and microscopic characteristics, biochemical testing and PCR. Then, the indole acetic acid production and phosphate-solubilizing activity were determined. Finally, the amount of lead in the plant was measured by atomic absorption method. Five strains of Bacillus cereus, Bacillus muralis, Bacillus sp., Pseudomonas fluorescens and Brevibacterium frigoritolerans with the ability of mineral phosphate solubilizing, high levels of indole acetic acid production and resistance to lead were isolated from the rhizosphere of C. tinctorius. The amount of produced indole acetic acid and the level of phosphate solubilizing by the isolates were 7.1-69.54 µg ml-1 and 91-147.3 µg ml-1 respectively. Lead assimilation in aerial part of safflower ranged from 925 to 2175 ppm. P. fluorescens and B. cereus strains had the highest effect on Lead assimilation with 2175 and 1862 ppm respectively. CONCLUSIONS The results showed that different bacterial treatments influenced the rate of lead absorption by C. tinctorius exposed to lead stress. SIGNIFICANCE AND IMPACT OF THE STUDY Use of rhizosphere isolates of C. tinctorius can improve phytoremediation capability and lead absorption in lead-contaminated soil.
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Affiliation(s)
- Atefeh Shahraki
- Department of Microbiology, Falavarjan Branch, Islamic Azad University, Isfahan, Iran
| | | | - Monireh Ranjbar
- Department of Biology, Falavarjan Branch, Islamic Azad University, Isfahan, Iran
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10
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Yanbo J, Jianyi J, Xiandong W, Wei L, Lincheng J. Bioaugmentation Technology for Treatment of Toxic and Refractory Organic Waste Water Based on Artificial Intelligence. Front Bioeng Biotechnol 2021; 9:696166. [PMID: 34277590 PMCID: PMC8283819 DOI: 10.3389/fbioe.2021.696166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 05/26/2021] [Indexed: 11/13/2022] Open
Abstract
With the development of modern chemical synthesis technology, toxic and harmful compounds increase sharply. In order to improve the removal efficiency of refractory organic matter in waste water, the method of adding powdered activated carbon (PAC) to the system for adsorption was adopted. Through the analysis of organic matter removal rule before and after waste water treatment, it can be found that PAC is easy to adsorb hydrophobic organic matter, while activated sludge is easy to remove hydrophilic and weakly hydrophobic neutral organic matter. Powdered activated carbon-activated sludge SBR system (PAC-AS) system is obviously superior to AS and PAC system in removing organic matter of hydrophilic and hydrophobic components, that is, biodegradation and PAC adsorption are additive. Compared with the control system, the Chemical Oxygen Demand (COD) removal rate of refractory substances increased by 8.36%, and PAC had a good adsorption effect on small molecular weight organic compounds, but with the increase of molecular weight of organic compounds, the adsorption effect of PAC gradually weakened, and it had no adsorption effect on macromolecular organic compounds. Based on the research of fuzzy control theory, an Agent control system for ozone oxidation process of industrial waste water based on Mobile Agent Server (MAS) theory was established, which was realized by fuzzy control method. The simulation results showed strong stability and verified the feasibility and adaptability of the distributed intelligent waste water treatment system based on MAS theory in the actual control process.
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Affiliation(s)
- Jiang Yanbo
- Research Center of Wastewater Engineering Treatment and Resource Recovery, Guangxi Beitou Environmental Protection and Water Group, Nanning, China.,Institute of Ecological Engineering, Guangxi University, Nanning, China
| | - Jiang Jianyi
- Research Center of Wastewater Engineering Treatment and Resource Recovery, Guangxi Beitou Environmental Protection and Water Group, Nanning, China
| | - Wei Xiandong
- Research Center of Wastewater Engineering Treatment and Resource Recovery, Guangxi Beitou Environmental Protection and Water Group, Nanning, China
| | - Ling Wei
- Research Center of Wastewater Engineering Treatment and Resource Recovery, Guangxi Beitou Environmental Protection and Water Group, Nanning, China
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11
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Wang Y, Zheng X, He X, Lü Q, Qian X, Xiao Q, Lin R. Effects of Pseudomonas TCd-1 on rice (Oryza sativa) cadmium uptake, rhizosphere soils enzyme activities and cadmium bioavailability under cadmium contamination. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 218:112249. [PMID: 33975222 DOI: 10.1016/j.ecoenv.2021.112249] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 03/09/2021] [Accepted: 04/11/2021] [Indexed: 06/12/2023]
Abstract
Microbial remediation is a promising technique to reduce Cd accumulation in rice (Oryza sativa). In present study, a set of pot experiments were conducted to evaluate the effects of Cd-tolerate Pseudomonas TCd-1 inoculation on rice Cd uptake, soil enzyme activities and Cd bioavailability in the rhizosphere soils under Cd contaminated conditions. The results showed that at the ripening stage, with the inoculation of TCd-1, Cd contents in root, culm, leaf, hull and brown rice significantly reduced by 60.7%, 47.7%, 50.6%, 58.1% and 47.9%, respectively, and the cadmium bioconcentration factor (BCF) of rice lowered by 66.2% under 5 mg kg-1 Cd treatment. At the meantime, in the rhizosphere soils, pH increased by 0.05, the contents of exchangeable Cd (EX-Cd) and Fe-Mn oxides (OX-Cd) increased by 107.8% and 33.5%, whereas organic matter (OM-Cd) and residual (Res-Cd) decreased by 31.9% and 60.0%, respectively. The activity of acid phosphatase (ACP) increased by 28.3%, catalase (CAT), saccharase (SUC) activity decreased by 28.5% and 26.0%. Similarly, the Cd contents in root, culm, leaf, hull and brown rice reduced by 42.1%, 42.5%, 58.0%, 50.3%, and 68.8%, respectively, and the BCF lowered by 57.1%, under 10 mg kg-1 Cd treatment. Simultaneously, the soil pH increased by 0.06, the activities of CAT, SUC, urease (URE), ACP decreased by 26.4%, 34.6%, 63.8% and 15.3%, respectively. Furthermore, the correlation analysis showed that the inoculation of TCd-1 changed the correlation between rice Cd content and the biomass of roots, leaves, soil pH, CAT, PPO, URE activities, OM-Cd in rhizosphere soils. It suggested that Pseudomonas TCd-1 effectively reduced Cd uptake and Cd accumulation in rice was closely linked to the changes of soil pH, enzyme activities and Cd availability.
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Affiliation(s)
- Yujie Wang
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xinyu Zheng
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Key Laboratory of Crop Ecology and Molecular Physiology of Fujian Province, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xiaosan He
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Qixin Lü
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xin Qian
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Key Laboratory of Crop Ecology and Molecular Physiology of Fujian Province, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Qingtie Xiao
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Key Laboratory of Crop Ecology and Molecular Physiology of Fujian Province, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Ruiyu Lin
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Key Laboratory of Crop Ecology and Molecular Physiology of Fujian Province, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
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12
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Nath S, Roy M, Sikidar J, Deb B, Sharma I, Guha A. Characterization and in-vitro screening of probiotic potential of novel Weissella confusa strain GCC_19R1 isolated from fermented sour rice. CURRENT RESEARCH IN BIOTECHNOLOGY 2021. [DOI: 10.1016/j.crbiot.2021.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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13
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Song L, Pan Z, Dai Y, Chen L, Zhang L, Liao Q, Yu X, Guo H, Zhou G. Characterization and comparison of the bacterial communities of rhizosphere and bulk soils from cadmium-polluted wheat fields. PeerJ 2020; 8:e10302. [PMID: 33194446 PMCID: PMC7648459 DOI: 10.7717/peerj.10302] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 10/14/2020] [Indexed: 12/13/2022] Open
Abstract
Cadmium pollution is becoming a serious problem due to its nondegradability and substantial negative influence on the normal growth of crops, thereby harming human health through the food chain. Rhizospheric bacteria play important roles in crop tolerance. However, there is little experimental evidence which demonstrates how various cadmium concentrations affect the bacterial community in wheat fields including rhizosphere microorganisms and nonrhizosphere (bulk) microorganisms. In this study, 16S rRNA amplicon sequencing technology was used to investigate bacterial communities in rhizosphere and bulk soils under different levels of pollution in terms of cadmium concentration. Both the richness and diversity of the rhizosphere microorganism community were higher under nonpolluted soil and very mild and mild cadmium-contaminated soils than compared with bulk soil, with a shift in community profile observed under severe cadmium pollution. Moreover, cadmium at various concentrations had greater influence on bacterial composition than for the nonpolluted site. In addition, redundancy analysis (RDA) and Spearman’s analysis elucidated the impact of exchangeable Cd and total Cd on bacterial community abundance and composition. This study suggests that cadmium imposes a distinct effect on bacterial community, both in bulk and rhizosphere soils of wheat fields. This study increases our understanding of how bacterial communities in wheat fields shaped under different concentrations of cadmium.
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Affiliation(s)
- Li Song
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Zhenzhi Pan
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Yi Dai
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Lin Chen
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China.,College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, Jiangsu, China
| | - Li Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing Univerity, Nanjing, Jiangsu, China
| | - Qilin Liao
- Geological Survey of Jiangsu Province, Nanjing, Jiangsu, China
| | - Xiezhi Yu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing Univerity, Nanjing, Jiangsu, China
| | - Hongyan Guo
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing Univerity, Nanjing, Jiangsu, China
| | - Guisheng Zhou
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
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14
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Nath S, Sinha A, Singha YS, Dey A, Bhattacharjee N, Deb B. Prevalence of antibiotic-resistant, toxic metal-tolerant and biofilm-forming bacteria in hospital surroundings. Environ Anal Health Toxicol 2020; 35:e2020018. [PMID: 32979903 PMCID: PMC7656160 DOI: 10.5620/eaht.2020018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 08/31/2020] [Indexed: 01/26/2023] Open
Abstract
The emergence and rapid spread of antibiotic-resistant bacteria due to unethical and non-scientific disposal of hospital wastes and clinical by-products caused an alarming environmental concern and associated public health risks. The present study aims to assess the co-selection of antibiotic resistance and heavy metal tolerance by bacteria isolated from hospital effluents. These isolates were also tested for hemolytic activity, pH-tolerance, thermal inactivation, auto-aggregation, cell-surface hydrophobicity and interaction with other bacteria. The study reports the prevalence of antibiotic-resistant and heavy metal tolerant bacteria in clinical effluents and water samples. Most of these isolates were resistant to vancomycin, clindamycin, ampicillin, rifampicin, penicillin-G, methicillin and cefdinir, and evidenced the production of extended-spectrum β-lactamase enzyme. Toxic metals such as cadmium, copper, iron, lead and zinc also exert a selection pressure towards antibiotic resistance. Pseudomonas aeruginosa strain GCC_19W3, Bacillus sp. strain GCC_19S2 and Achromobacter spanius strain GCC_SB1 showed β-hemolysis, evidenced by the complete breakdown of the red blood cells. Highest auto-aggregation was exhibited by Bacillus sp. strain GCC_19S2; whereas, maximum cell-surface hydrophobicity was displayed by P. aeruginosa strain GCC_19W1. Antagonistic activity by Stenotrophomonas maltophilia strain GCC_19W2, P. aeruginosa strain GCC_19W3 and strains of Achromobacter restricts the growth of other microorganisms by producing some bactericidal substances. The study emphasises undertaking safety measures for the disposal of clinical effluents directly into the environment. The study suggests adopting necessary measures and regulations to restrict the spread of emerging pathogens within the hospital biome and community, which if unnoticed, might pose a significant clinical challenge.
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Affiliation(s)
- Soumitra Nath
- Department of Biotechnology, Gurucharan College, Silchar, Assam, India
- Bioinformatics Centre, Gurucharan College, Silchar, Assam, India
- Institutional Biotech Hub, Gurucharan College, Silchar, Assam, India
| | - Ahana Sinha
- Department of Biotechnology, Gurucharan College, Silchar, Assam, India
| | | | - Ankita Dey
- Department of Biotechnology, Gurucharan College, Silchar, Assam, India
| | | | - Bibhas Deb
- Department of Biotechnology, Gurucharan College, Silchar, Assam, India
- Bioinformatics Centre, Gurucharan College, Silchar, Assam, India
- Institutional Biotech Hub, Gurucharan College, Silchar, Assam, India
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15
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Wang C, Wei Z, Han Z, Wang J, Zhang X, Wang Y, Liu Q, Yang Z. Neutrophil extracellular traps promote cadmium chloride-induced lung injury in mice. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 254:113021. [PMID: 31415976 DOI: 10.1016/j.envpol.2019.113021] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/27/2019] [Accepted: 08/04/2019] [Indexed: 06/10/2023]
Abstract
Cadmium (Cd) is a ubiquitous toxic heavy metal derived mainly from industrial processes. In industrialized societies, individuals are exposed to a plethora of sources of Cd pollution. Cd can trigger serious diseases such as rheumatoid arthritis (RA) and chronic obstructive pulmonary disease (COPD) by the over-activating immune system. As an effector mechanism in innate immunity, neutrophil extracellular traps (NETs) not only play an important role in defending against infection but also lead to tissue damage. However, the role of NETs in Cd-induced lung damage process has not been previously studied. In this study, we aimed to investigate the potential effects of Cd-induced NETs on lung injury in vivo and further to clarify the molecular mechanisms of Cd-induced NETs formation. In vivo, Cd treatment destroyed the structural integrity of lung tissue and significantly increased the levels of NETs in the bronchoalveolar lavage fluid (BALF). The known NETs inhibitor DNase I ameliorated pathologic changes and significantly decreased levels of NETs in BALF, which suggesting the curial role of NETs in Cd-induced lung injury. Further investigation showed that Cd could significantly trigger NETs formation, which is composed of DNA backbone decorated with histones (H3) and neutrophils elastase (NE). The inhibitors of NADPH oxidase, ERK1/2 and p38 MAPK-signaling pathways significantly reduced the formation of NETs, and western blotting analysis also showed that Cd significantly increased the phosphorylation of p38 and ERK1/2 signaling pathways. Above results confirmed that NADPH oxidase, ERK1/2 and p38 MAPK-signaling pathways were related to Cd-induced NETs formation. In conclusion, NETs was involved in Cd-induced lung injury, and the mechanisms of Cd-induced NETs formation was via activating NADPH oxidase, ERK1/2 and p38 MAPK-signaling pathways, which might provide a new perspective in Cd-induced lung injury.
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Affiliation(s)
- Chaoqun Wang
- College of Life Sciences and Engineering, Foshan University, Foshan 528225, Guangdong Province, PR China; Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin province, PR China
| | - Zhengkai Wei
- College of Life Sciences and Engineering, Foshan University, Foshan 528225, Guangdong Province, PR China; Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin province, PR China
| | - Zhen Han
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin province, PR China
| | - Jingjing Wang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin province, PR China
| | - Xu Zhang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin province, PR China
| | - Yanan Wang
- Key Laboratory of Zoonosis, Ministry of Education, College of Veterinary Medicine, Jilin University, Changchun 130062, Jilin province, PR China
| | - Quan Liu
- College of Life Sciences and Engineering, Foshan University, Foshan 528225, Guangdong Province, PR China
| | - Zhengtao Yang
- College of Life Sciences and Engineering, Foshan University, Foshan 528225, Guangdong Province, PR China.
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16
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Khan I, Aftab M, Shakir S, Ali M, Qayyum S, Rehman MU, Haleem KS, Touseef I. Mycoremediation of heavy metal (Cd and Cr)-polluted soil through indigenous metallotolerant fungal isolates. ENVIRONMENTAL MONITORING AND ASSESSMENT 2019; 191:585. [PMID: 31440913 DOI: 10.1007/s10661-019-7769-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 08/15/2019] [Indexed: 06/10/2023]
Abstract
Remediation of heavy metals, other than microbial bioleaching method, is expensive and unsuitable for large contaminated areas. The current study was aimed to isolate, identify, and test the potential of indigenous fungal strains for heavy metal removal from contaminated soil. A total of three metallotolerant fungal strains, i.e., Aspergillus niger (M1DGR), Aspergillus fumigatus (M3Ai), and Penicillium rubens (M2Aii), were isolated and identified by phenotyping and genotyping from heavy metal-contaminated soil of Hattar Industrial Estate, Pakistan. A. niger was found to be the most successful strain for the removal of heavy metals from the contaminated soil with maximum bioaccumulation efficiency of 98% (Cd) and 43% (Cr). In contrast, A. fumigatus showed comparatively low but still considerable bioleaching potential, i.e., 79% and 69% for Cd and Cr removal, respectively. Maximum metal uptake efficiency, i.e., 0.580 mg g-1 and 0.152 mg g-1 by A. niger strain was noticed for Cd and Cr with Czapek yeast extract (CYE) and Sabouraud dextrose broth (SDB) media, respectively. A. fumigatus (M3Ai) exhibited the maximum bioleaching capacity (0.40 mg g-1) for Cr with CYE medium. The results reveal that A. niger M1DGR and A. fumigatus M3Ai could be used to develop new strategies to remediate soil contaminated with heavy metals (Cd and Cr) through either in situ or ex situ mycoremediation.
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Affiliation(s)
- Ibrar Khan
- Department of Microbiology, Abbottabad University of Science & Technology, Abbottabad, 22010, Pakistan.
| | - Maryam Aftab
- Department of Microbiology, Hazara University, Mansehra, 21300, Pakistan
| | - SajidUllah Shakir
- Department of Microbiology, Hazara University, Mansehra, 21300, Pakistan
| | - Madiha Ali
- Department of Microbiology, Hazara University, Mansehra, 21300, Pakistan
| | - Sadia Qayyum
- Department of Microbiology, Hazara University, Mansehra, 21300, Pakistan
| | - Mujadda Ur Rehman
- Department of Microbiology, Abbottabad University of Science & Technology, Abbottabad, 22010, Pakistan
| | - Kashif Syed Haleem
- Department of Microbiology, Hazara University, Mansehra, 21300, Pakistan
| | - Isfahan Touseef
- Department of Microbiology, Hazara University, Mansehra, 21300, Pakistan.
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17
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Astudillo-García C, Hermans SM, Stevenson B, Buckley HL, Lear G. Microbial assemblages and bioindicators as proxies for ecosystem health status: potential and limitations. Appl Microbiol Biotechnol 2019; 103:6407-6421. [DOI: 10.1007/s00253-019-09963-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 06/03/2019] [Accepted: 06/04/2019] [Indexed: 01/04/2023]
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18
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Isolation and identification of metal-tolerant and antibiotic-resistant bacteria from soil samples of Cachar district of Assam, India. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0762-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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