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Díaz AM, Baragaño D, Menéndez-Aguado JM, Norén A, Karlfeldt Fedje K, Espín E, Gallego JR. Enhanced remediation of organotin compounds and metal(loid)s in polluted sediments: Chemical stabilization with mining-wastes and nZVI versus physical soil washing. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2025; 373:123602. [PMID: 39667335 DOI: 10.1016/j.jenvman.2024.123602] [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: 08/29/2024] [Revised: 11/21/2024] [Accepted: 12/01/2024] [Indexed: 12/14/2024]
Abstract
Here we describe two innovative approaches for remediating sediments contaminated with organotin compounds (OTCs, mainly TBT) and metal(loid)s. The first involves chemical stabilization through amendments with nanoscale zero-valent iron (nZVI), dunite mining waste, and coal tailings, materials that have not been previously studied for OTC remediation. The second focuses on physical soil washing, using grain-size separation and magnetic separation to isolate the most polluted fractions, thereby reducing the volume of contaminated material destined for landfills. The results for the first approach indicated that OTC degradation occurred mainly through nZVI application, with concurrent immobilization of As and mobilization of Cu. Furthermore, combining nZVI with coal tailings enhanced OTC degradation whereas dunite mining waste effectively immobilized Zn. In turn, in the second approach, grain-size separation efficiently removed coarse material (>500 μm) with low pollutant concentrations. Subsequent magnetic separation selectively concentrated less than 5% of the initial volume of sediment in a magnetic fraction that showed the highest contaminant content. Therefore, 95% of material revealed lower contaminant concentrations than the feed material. These findings highlight the potential of combining physical soil washing, which significantly reduces the volume of contaminated sediments, with chemical stabilization, which can effectively stabilize the polluted fractions isolated in the physical treatment.
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Affiliation(s)
- A M Díaz
- INDUROT and Environmental Biogeochemistry & Raw Materials Group, Campus of Mieres, University of Oviedo, 33600, Mieres, Spain
| | - D Baragaño
- Instituto de Ciencia y Tecnología del Carbono, INCAR-CSIC, C/ Francisco Pintado Fe, 26, 33011 Oviedo, Spain.
| | - J M Menéndez-Aguado
- Environmental Biogeochemistry & Raw Materials Group. Campus of Mieres, University of Oviedo, 33600, Mieres, Spain
| | - A Norén
- Department of Architecture and Civil Engineering, Water Environment Technology. Chalmers University of Technology, 412 96 Gothenburg, Sweden
| | - K Karlfeldt Fedje
- Department of Architecture and Civil Engineering, Water Environment Technology. Chalmers University of Technology, 412 96 Gothenburg, Sweden; Recycling and Waste Management, Renova AB, Box 156, SE-401 22 Gothenburg, Sweden
| | - E Espín
- Instituto de Investigaciones Mineras (IIM), Universidad Nacional de San Juan, Av. del Libertador General San Martin, 1109, San Juan, Argentina
| | - J R Gallego
- INDUROT and Environmental Biogeochemistry & Raw Materials Group, Campus of Mieres, University of Oviedo, 33600, Mieres, Spain
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2
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Murthy MK, Khandayataray P, Mohanty CS, Pattanayak R. A review on arsenic pollution, toxicity, health risks, and management strategies using nanoremediation approaches. REVIEWS ON ENVIRONMENTAL HEALTH 2024; 39:269-289. [PMID: 36563406 DOI: 10.1515/reveh-2022-0103] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
OBJECTIVES Over 50 countries are affected by arsenic contamination. The problem is becoming worse as the number of affected people increases and new sites are reported globally. CONTENT Various human activities have increased arsenic pollution, notably in both terrestrial and aquatic environments. Contamination of our water and soil by arsenic poses a threat to our environment and natural resources. Arsenic poisoning harms several physiological systems and may cause cancer and death. Excessive exposure may cause toxic build-up in human and animal tissues. Arsenic-exposed people had different skin lesion shapes and were vulnerable to extra arsenic-induced illness risks. So far, research shows that varying susceptibility plays a role in arsenic-induced diseases. Several studies have revealed that arsenic is a toxin that reduces metabolic activities. Diverse remediation approaches are being developed to control arsenic in surrounding environments. SUMMARY AND OUTLOOK A sustainable clean-up technique (nanoremediation) is required to restore natural equilibrium. More research is therefore required to better understand the biogeochemical processes involved in removing arsenic from soils and waters.
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Affiliation(s)
- Meesala Krishna Murthy
- Department of Allied Health Sciences, Chitkara School of Health Sciences, Chitkara University, Rajpura, Punjab, India
| | - Pratima Khandayataray
- Department of Zoology, School of Life Science, Mizoram University, Aizawl, Mizoram, India
| | - Chandra Sekhar Mohanty
- Plant Genomic Resources and Improvement Division, CSIR-National Botanical Research Institute, Lucknow, Uttar Pradesh, India
| | - Rojalin Pattanayak
- Department of Zoology, Department of Zoology, College of Basic Science, Odisha University of Agriculture and Technology, Bhubaneswar, Odisha, India
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3
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Wang M, Wu B, Zheng Q, Yang P, Hu J, Zheng S. Highly effective removal of 4-chloroaniline in water by nano zero-valent iron cooperated with microbial degradation. JOURNAL OF HAZARDOUS MATERIALS 2024; 470:134235. [PMID: 38608585 DOI: 10.1016/j.jhazmat.2024.134235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/28/2024] [Accepted: 04/06/2024] [Indexed: 04/14/2024]
Abstract
The misuse of aromatic amines like 4-chloroaniline (4-CA) has led to severe environmental and health issues. However, it's difficult to be utilized by microorganisms for degradation. Nano-zero-valent iron (nZVI) is a promising material for the remediation of chloroaniline pollution, however, the synergistic effect and mechanism of nZVI with microorganisms for the degradation of 4-CA are still unclear. This study investigated the potential of 4-CA removal by the synergistic system involving nZVI and 4-CA degrading microbial flora. The results indicate that the addition of nZVI significantly enhanced the bio-degradation rate of 4-CA from 43.13 % to 62.26 %. Under conditions involving 0.1 % nZVI addition at a 24-hour interval, pH maintained at 7, and glucose as an external carbon source, the microbial biomass, antioxidant enzymes, and dehydrogenase were significantly increased, and the optimal 4-CA degradation rate achieved 68.79 %. Additionally, gas chromatography-mass spectrometry (GC-MS) analysis of intermediates indicated that the addition of nZVI reduced compounds containing benzene rings and enhanced the dechlorination efficiency. The microbial community remained stable during the 4-CA degradation process. This study illustrates the potential of nZVI in co-microbial remediation of 4-CA compounds in the environment.
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Affiliation(s)
- MeiQi Wang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China
| | - Bin Wu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China.
| | - QingJuan Zheng
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China
| | - Peng Yang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China
| | - JunQi Hu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China
| | - Shuai Zheng
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, PR China
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Peña-Álvarez V, Baragaño D, Prosenkov A, Gallego JR, Peláez AI. Assessment of co-contaminated soil amended by graphene oxide: Effects on pollutants, microbial communities and soil health. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 272:116015. [PMID: 38290314 DOI: 10.1016/j.ecoenv.2024.116015] [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: 08/31/2023] [Revised: 12/27/2023] [Accepted: 01/22/2024] [Indexed: 02/01/2024]
Abstract
Graphene oxide (GOx) is a nanomaterial with demonstrated capacity to remove metals from water. However, its effects on organic pollutants and metal(loid)s present in polluted soils when used for remediation purposes have not been extensively addressed. Likewise, few studies describe the effects of GOx on edaphic properties and soil biology. In this context, here we assessed the potential of GOx for remediating polluted soil focusing also on different unexplored effects of GOx in soil. To achieve this, we treated soil contaminated with concurrent inorganic (As and metals) and organic pollution (TPH and PAHs), using GOx alone and in combination with nutrients (N and P sources). In both cases increased availability of As and Zn was observed after 90 days, whereas Cu and Hg availability was reduced and the availability of Pb and the concentration of organic pollutants were not significantly affected. The application of GOx on the soil induced a significant and rapid change (within 1 week) in microbial populations, leading to a transient reduction in biodiversity, consistent with the alteration of several soil properties. Concurrently, the combination with nutrients exhibited a distinct behaviour, manifesting a more pronounced and persistent shift in microbial populations without a decrease in biodiversity. On the basis of these findings, GOx emerges as a versatile amendment for soil remediation approaches.
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Affiliation(s)
- V Peña-Álvarez
- Area of Microbiology, Department of Functional Biology and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Spain; Institute of Biotechnology of Asturias (IUBA), University of Oviedo, Spain
| | - D Baragaño
- School of Mines and Energy Engineering, University of Cantabria, Blvr. Ronda Rufino Peón 254, 39300 Torrelavega, Cantabria, Spain.
| | - A Prosenkov
- Area of Microbiology, Department of Functional Biology and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Spain; Institute of Biotechnology of Asturias (IUBA), University of Oviedo, Spain
| | - J R Gallego
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, Campus of Mieres, University of Oviedo, Mieres, Spain
| | - A I Peláez
- Area of Microbiology, Department of Functional Biology and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Spain; Institute of Biotechnology of Asturias (IUBA), University of Oviedo, Spain
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5
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Bao Q, Bao Y, Shi J, Sun Y. Nano zero-valent iron and melatonin synergistically alters uptake and translocation of Cd and As in soil-rice system and mechanism in soil chemistry and microbiology. ENVIRONMENT INTERNATIONAL 2024; 185:108550. [PMID: 38452466 DOI: 10.1016/j.envint.2024.108550] [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: 01/10/2024] [Revised: 02/15/2024] [Accepted: 03/01/2024] [Indexed: 03/09/2024]
Abstract
Nanoscale zero-valent iron (Fe) is a promising nanomaterial for remediating heavy metal-contaminated soils. Melatonin (MT) is essential to alleviate environmental stress in plants. However, the conjunction effects of Fe and MT (FeMT) on rice Cd, As accumulation and the mechanism of soil chemical and microbial factors interaction are unclear. Here, a pot experiment was conducted to evaluated the effects of the FeMT for rice Cd, As accumulation and underlying mechanisms. The findings showed that FeMT significantly reduced grains Cd by 92%-87% and As by over 90%, whereas improving grains Fe by over 213%. Soil available-Cd and iron plaques-Cd (extracted by dithionite-citrate-bicarbonate solution, DCB-Cd) significantly regulated roots Cd, thus affected Cd transport to grains. Soil pH significantly affected soil As and DCB-As, which further influenced roots As uptake and the transport to shoots and grains. The interactions between the soil bacterial community and soil Fe, available Fe, and DCB-Fe together affected root Fe absorption and transportation in rice. FeMT significantly influenced rhizosphere soil bacterial α- and β-diversity. Firmicutes as the dominant phylum exhibited a significant positive response to FeMT measure, and acted a key role in reducing soil Cd and As availability mainly by improving iron-manganese plaques. The increase of soil pH caused by FeMT was beneficial only for Actinobacteriota growth, which reduced Cd, As availability probably through complexation and adsorption. FeMT also showed greater potential in reducing human health and ecological risks by rice consumption and straw returning. These results showed the important role of both soil chemical and microbial factors in FeMT-mediated rice Cd, As reduction efficiency. This study opens a novel strategy for safe rice production and improvement of rice iron nutrition level in heavy-metals polluted soil, but also provides new insights into the intricate regulatory relationships among soil biochemistry, toxic elements, microorganism, and plants.
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Affiliation(s)
- Qiongli Bao
- Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjing, 300191, China.
| | - Yinrong Bao
- Agronomy College, Gansu Agricultural University, Lanzhou, 730070, China
| | - Jiahao Shi
- Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjing, 300191, China
| | - Yuebing Sun
- Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjing, 300191, China
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6
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Cui X, Hou D, Tang Y, Liu M, Qie H, Qian T, Xu R, Lin A, Xu X. Effects of the application of nanoscale zero-valent iron on plants: Meta analysis, mechanism, and prospects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 900:165873. [PMID: 37517727 DOI: 10.1016/j.scitotenv.2023.165873] [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: 05/15/2023] [Revised: 07/18/2023] [Accepted: 07/27/2023] [Indexed: 08/01/2023]
Abstract
In order to determine the ideal conditions for the application of nanoscale zero-valent iron (nZVI) in agricultural production, this review studies the effects of nZVI application on plant physiological parameters, presents its mechanism and prospective outcomes. In this research, it was observed that the application of nZVI had both favorable and unfavorable effects on plant growth, photosynthesis, oxidative stress, and nutrient absorption levels. Specifically, the application of nZVI significantly increased the biomass and length of plants, and greatly reduced the germination rate of seeds. In terms of photosynthesis, there was no significant effect for the application of nZVI on the synthesis of photosynthetic pigments (chlorophyll and carotenoids). In terms of oxidative stress, plants respond by increasing the activity of antioxidant enzyme under mild nZVI stress and trigger oxidative burst under severe stress. In addition, the application of nZVI significantly increased the absorption of nutrients (B, K, P, S, Mg, Zn, and Fe). In summary, the application of nZVI can affect the plant physiological parameters, and the degree of influence varies depending on the concentration, preparation method, application method, particle size, and action time of nZVI. These findings are important for evaluating nZVI-related risks and enhancing nZVI safety in agricultural production.
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Affiliation(s)
- Xuedan Cui
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Daibing Hou
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Yiming Tang
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Meng Liu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Hantong Qie
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Tuzheng Qian
- Wellington college, Duke's Ride, Berkshire, Crowthorne RG45 7PU, England, United Kingdom
| | - Ruiqing Xu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Aijun Lin
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
| | - Xin Xu
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, PR China.
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7
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Khan ZUH, Gul NS, Sabahat S, Sun J, Tahir K, Shah NS, Muhammad N, Rahim A, Imran M, Iqbal J, Khan TM, Khasim S, Farooq U, Wu J. Removal of organic pollutants through hydroxyl radical-based advanced oxidation processes. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 267:115564. [PMID: 37890248 DOI: 10.1016/j.ecoenv.2023.115564] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 09/11/2023] [Accepted: 10/08/2023] [Indexed: 10/29/2023]
Abstract
The use of Advance Oxidation Process (AOPs) has been extensively examined in order to eradicate organic pollutants. This review assesses the efficacy of photolysis, O3 based (O3/UV, O3/H2O2, O3/H2O2/UV, H2O2/UV, Fenton, Fenton-like, hetero-system) and sonochemical and electro-oxidative AOPs in this regard. The main purpose of this review and some suggestions for the advancement of AOPs is to facilitate the elimination of toxic organic pollutants. Initially proposed for the purification of drinking water in 1980, AOPs have since been employed for various wastewater treatments. AOPs technologies are essentially a process intensification through the use of hybrid methods for wastewater treatment, which generate large amounts of hydroxyl (•OH) and sulfate (SO4·-) radicals, the ultimate oxidants for the remediation of organic pollutants. This review covers the use of AOPs and ozone or UV treatment in combination to create a powerful method of wastewater treatment. This novel approach has been demonstrated to be highly effective, with the acceleration of the oxidation process through Fenton reaction and photocatalytic oxidation technologies. It is clear that Advance Oxidation Process are a helpful for the degradation of organic toxic compounds. Additionally, other processes such as •OH and SO4·- radical-based oxidation may also arise during AOPs treatment and contribute to the reduction of target organic pollutants. This review summarizes the current development of AOPs treatment of wastewater organic pollutants.
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Affiliation(s)
- Zia Ul Haq Khan
- Department of Chemistry, COMSATS University Islamabad, Park Road, Islamabad 45550, Pakistan.
| | - Noor Shad Gul
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China; Department of Pharmacology, Laboratory of Cardiovascular Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Sana Sabahat
- Department of Chemistry, COMSATS University Islamabad, Park Road, Islamabad 45550, Pakistan.
| | - Jingyu Sun
- Hubei key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Cihu Road 11, Huangshi, Hubei 435002, PR China
| | - Kamran Tahir
- Institute of Chemical Sciences, Gomal University, D. I. Khan, KP, Pakistan
| | - Noor Samad Shah
- Department of Environmental Sciences, CMSATS University Islamabad, Vehari Campus, 61100, Pakistan
| | - Nawshad Muhammad
- Department of Dental Material Sciences, Institute of Basic Medical Sciences Khyber Medical University, Peshawar, KPK, Pakistan
| | - Abdur Rahim
- Department of Chemistry, COMSATS University Islamabad, Park Road, Islamabad 45550, Pakistan
| | - Muhammad Imran
- Department of Environmental Sciences, CMSATS University Islamabad, Vehari Campus, 61100, Pakistan
| | - Jibran Iqbal
- College of Interdisciplinary Studies, Zayed University, Abu Dhabi 144534, United Arab Emirates
| | - Taj Malook Khan
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China; Department of Pharmacology, Laboratory of Cardiovascular Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China.
| | - Syed Khasim
- Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Umar Farooq
- Department of Chemistry, COMSATS University Islamabad, Abbottabad-Campus, KPK 22060, Pakistan; Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jianbo Wu
- Drug Discovery Research Center, Southwest Medical University, Luzhou, China; Department of Pharmacology, Laboratory of Cardiovascular Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China
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8
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Prosenkov A, Cagnon C, Gallego JLR, Pelaez AI. The microbiome of a brownfield highly polluted with mercury and arsenic. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 323:121305. [PMID: 36804142 DOI: 10.1016/j.envpol.2023.121305] [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: 11/18/2022] [Revised: 02/11/2023] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
Abandoned brownfields represent a challenge for their recovery. To apply sustainable remediation technologies, such as bioremediation or phytoremediation, indigenous microorganisms are essential agents since they are adapted to the ecology of the soil. Better understanding of microbial communities inhabiting those soils, identification of microorganisms that drive detoxification process and recognising their needs and interactions will significantly improve the outcome of the remediation. With this in mind we have carried out a detailed metagenomic analysis to explore the taxonomic and functional diversity of the prokaryotic and eukaryotic microbial communities in soils, several mineralogically distinct types of pyrometallurgic waste, and groundwater sediments of a former mercury mining and metallurgy site which harbour very high levels of arsenic and mercury pollution. Prokaryotic and eukaryotic communities were identified, which turned out to be more diverse in the surrounding contaminated soils compared to the pyrometallurgic waste. The highest diversity loss was observed in two environments most contaminated with mercury and arsenic (stupp, a solid mercury condenser residue and arsenic-rich soot from arsenic condensers). Interestingly, microbial communities in the stupp were dominated by an overwhelming majority of archaea of the phylum Crenarchaeota, while Ascomycota and Basidiomycota fungi comprised the fungal communities of both stump and soot, results that show the impressive ability of these previously unreported microorganisms to colonize these extreme brownfield environments. Functional predictions for mercury and arsenic resistance/detoxification genes show their increase in environments with higher levels of pollution. Our work establishes the bases to design sustainable remediation methods and, equally important, to study in depth the genetic and functional mechanisms that enable the subsistence of microbial populations in these extremely selective environments.
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Affiliation(s)
- Alexander Prosenkov
- Area of Microbiology, Department of Functional Biology, Environmental Biogeochemistry and Raw Materials Group and IUBA, University of Oviedo, 33006 Oviedo, Asturias, Spain
| | - Christine Cagnon
- Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, IPREM, Pau, France
| | - José Luis R Gallego
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, Campus of Mieres, University of Oviedo, 33600 Mieres, Asturias, Spain
| | - Ana Isabel Pelaez
- Area of Microbiology, Department of Functional Biology, Environmental Biogeochemistry and Raw Materials Group and IUBA, University of Oviedo, 33006 Oviedo, Asturias, Spain.
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9
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Gallego JLR, Peña-Álvarez V, Lara LM, Baragaño D, Forján R, Colina A, Prosenkov A, Peláez AI. Effective bioremediation of soil from the Burgan oil field (Kuwait) using compost: A comprehensive hydrocarbon and DNA fingerprinting study. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 247:114267. [PMID: 36368113 DOI: 10.1016/j.ecoenv.2022.114267] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 10/25/2022] [Accepted: 10/31/2022] [Indexed: 06/16/2023]
Abstract
An innovative combination of metagenomic profiling of microbial communities and GC-MS & Pyrolysis-GC-MS fingerprinting methods were used to assess the biodegradation of contaminated soil from the Burgan oil field in Kuwait. The soil was treated with (sludge) compost in microcosms to evaluate the feasibility of this material for bioremediation purposes. The most favourable trial showed a > 80% decrease in TPH, thereby indicating strong potential for full-scale application using a cost-effective technology and thus in line with the principles of the circular economy. The microbial study showed that compost addition enhanced the organic matter and nutrient content of the soil. However, the microorganisms in the compost did not seem to play a relevant role in bioremediation, meaning that compost amendments serve as a biostimulation rather than a bioaugmentation approach. The chemical study of the distinct oil fractions revealed rapidly biodegraded compounds (alkanes, alkyl-aromatics, etc.) and others that were much more refractory (hopanes, benzohopanes, etc.). Of note, although heavy fractions are usually considered recalcitrant to biodegradation, we observed incipient degradation of the asphaltene fraction by means of double-shot thermodesorption and pyrolysis. Finally, chemical fingerprinting also revealed that the treated soil contained some of the compounds found in the compost, such as coprostanol, cholesterol, and plant sterols. This observation would support the use of these compounds as proxies to monitor the effects of compost and to adjust dosages in real-scale bioremediation treatments.
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Affiliation(s)
- José Luis R Gallego
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Mieres, Spain.
| | - Verónica Peña-Álvarez
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Mieres, Spain; Area of Microbiology, Department of Functional Biology and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Oviedo, Spain; University Institute of Biotechnology of Asturias (IUBA), University of Oviedo, Oviedo, Spain
| | - Luis M Lara
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Mieres, Spain
| | - Diego Baragaño
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Mieres, Spain; Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Czech Republic
| | - Rubén Forján
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Mieres, Spain
| | - Arturo Colina
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Mieres, Spain
| | - Alexander Prosenkov
- Area of Microbiology, Department of Functional Biology and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Oviedo, Spain; University Institute of Biotechnology of Asturias (IUBA), University of Oviedo, Oviedo, Spain
| | - Ana Isabel Peláez
- Area of Microbiology, Department of Functional Biology and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Oviedo, Spain; University Institute of Biotechnology of Asturias (IUBA), University of Oviedo, Oviedo, Spain
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10
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Beker SA, Khudur LS, Krohn C, Cole I, Ball AS. Remediation of groundwater contaminated with dye using carbon dots technology: Ecotoxicological and microbial community responses. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 319:115634. [PMID: 35803070 DOI: 10.1016/j.jenvman.2022.115634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 06/23/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
Groundwater pollution poses a serious threat to the main source of clean water globally. Nanoparticles have the potential for remediation of polluted aquifers; however, environmental safety concerns associated with in situ deployments of such technology include potential detrimental effects on microorganisms in terms of toxicity and functional disruptions. In this work, we evaluated a new and ecofriendly approach using carbon dots (CDs) as Fenton-like catalysts to catalyse the degradation of dye-containing groundwater samples. This investigation aimed at evaluating the efficacy of a novel remediation technology in terms of dye degradation and toxicity reduction while assessing its impacts on aquatic microorganisms. Uncontaminated Australian groundwater samples were spiked with methylene blue and incubated in the dark, at 18 °C, under slow agitation, using CDs at 0.5 mg mL-1 and H2O2 at 73.5 mM for 25 h. The dye degradation rate was determined as well as the toxicity of the treated solutions using the Microtox® bioassay. Further, to determine the changes in the groundwater microbial community, 16 S rRNA sequencing was used and evenness and diversity indices were analysed using Pielou's evenness and Simpson index, respectively. This study revealed that dye-containing groundwater were effectively treated by CDs showing a degradation rate of 78-82% and a significant 4-fold reduction in the toxicity. Characterisation of the groundwater microbiota revealed a predominance of at least 60% Proteobacteria phylum in all samples where diversity and evenness were maintained throughout the remediation process. The results showed that CDs could be an efficient approach to treat polluted groundwater and potentially have minimum impact on the environmental microbiome.
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Affiliation(s)
- Sabrina A Beker
- School of Science, RMIT University, Bundoora, VIC, 3083, Australia.
| | - Leadin S Khudur
- School of Science, RMIT University, Bundoora, VIC, 3083, Australia
| | - Christian Krohn
- School of Science, RMIT University, Bundoora, VIC, 3083, Australia
| | - Ivan Cole
- Advanced Manufacturing and Fabrication, School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Andrew S Ball
- School of Science, RMIT University, Bundoora, VIC, 3083, Australia
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11
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Cerqueira B, Covelo EF, Rúa-Díaz S, Marcet P, Forján R, Gallego JLR, Trakal L, Beesley L. Contrasting mobility of arsenic and copper in a mining soil: A comparative column leaching and pot testing approach. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 318:115530. [PMID: 35752005 DOI: 10.1016/j.jenvman.2022.115530] [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: 04/13/2022] [Revised: 06/06/2022] [Accepted: 06/12/2022] [Indexed: 06/15/2023]
Abstract
The remediation of legacy metal(loid) contaminated soils in-situ relies on the addition of [organic] amendments to reduce the mobility and bioavailability of metal(loid)s, improve soil geochemical parameters and restore vegetation growth. Two vermicomposts of food and animal manure waste origin (V1 and V2) were amended to an arsenic (As) and copper (Cu) contaminated mine soil (≤1500 mg kg-1). Leaching columns and pot experiments evaluated copper and arsenic in soil pore waters, as well as pH, dissolved organic carbon (DOC) and phosphate (PO43-) concentrations. The uptake of As and Cu to ryegrass was also measured via the pot experiment, whilst recovered biochars from the column leaching test were measured for metal sorption at the termination of leaching. Vermicompost amendment to soil facilitated ryegrass growth which was entirely absent from the untreated soil in the pot test. All amendment combinations raised pore water pH by ∼4 units. Copper concentrations in pore waters from columns and pots showed steep reductions (∼1 mg L-1), as a result of V1 & V2 compared to untreated soil (∼500 mg L-1). Combined with an increase in DOC and PO43-, As was mobilised an order of magnitude by V1. Biochar furthest reduced Cu in pore waters from the columns to <0.1 mg L-1, as a result of surface sorption. The results of this study indicate that biochar can restrict the mobility of Cu from a contaminated mine soil after other amendment interventions have been used to promote revegetation. However, the case of As, biochar cannot counter the profound impact of vermicompost on arsenic mobility.
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Affiliation(s)
- Beatriz Cerqueira
- Department of Plant Biology and Soil Science, Faculty of Biology, University of Vigo, Vigo, Spain; Environmental and Geochemical Sciences Department, The James Hutton Institute, Craigiebuckler, Aberdeen AB158QH, UK.
| | - Emma F Covelo
- Department of Plant Biology and Soil Science, Faculty of Biology, University of Vigo, Vigo, Spain
| | - Sandra Rúa-Díaz
- Department of Plant Biology and Soil Science, Faculty of Biology, University of Vigo, Vigo, Spain
| | - Purificación Marcet
- Department of Plant Biology and Soil Science, Faculty of Biology, University of Vigo, Vigo, Spain
| | - Rubén Forján
- Environmental Biogeochemistry & Raw Materials Group and INDUROT, University of Oviedo, Mieres, Spain
| | - José Luis R Gallego
- Environmental Biogeochemistry & Raw Materials Group and INDUROT, University of Oviedo, Mieres, Spain
| | - Lukas Trakal
- Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Praha 6 Suchdol, Czech Republic
| | - Luke Beesley
- Department of Environmental Geosciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Praha 6 Suchdol, Czech Republic; Environmental and Geochemical Sciences Department, The James Hutton Institute, Craigiebuckler, Aberdeen AB158QH, UK
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12
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Yao Y, Zhang T, Tang M. A critical review of advances in reproductive toxicity of common nanomaterials to Caenorhabditis elegans and influencing factors. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 306:119270. [PMID: 35398402 DOI: 10.1016/j.envpol.2022.119270] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 03/31/2022] [Accepted: 04/03/2022] [Indexed: 06/14/2023]
Abstract
In recent decades, nanotechnology has rapidly developed. Therefore, there is growing concern about the potential environmental risks of nanoparticles (NPs). Caenorhabditis elegans (C. elegans) has been used as a powerful tool for studying the potential ecotoxicological impacts of nanomaterials from the whole animal level to single cell level, especially in the area of reproduction. In this review, we discuss the reproductive toxicity of common nanomaterials in C. elegans, such as metal-based nanomaterial (silver nanoparticles (NPs), gold NPs, zinc oxide NPs, copper oxide NPs), carbon-based nanomaterial (graphene oxide, multi-walled carbon nanotubes, fullerene nanoparticles), polymeric NPs, silica NPs, quantum dots, and the potential mechanisms involved. This insights into the toxic effects of existing nanomaterials on the human reproductive system. In addition, we summarize how the physicochemical properties (e.g., size, charge, surface modification, shape) of nanomaterials influence their reproductive toxicity. Overall, using C. elegans as a platform to develop rapid detection techniques and prediction methods for nanomaterial reproductive toxicity is expected to reduce the gap between biosafety evaluation of nanomaterials and their application.
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Affiliation(s)
- Yongshuai Yao
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Ting Zhang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Meng Tang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China.
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13
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Kahraman BF, Altin A, Ozdogan N. Remediation of Pb-diesel fuel co-contaminated soil using nano/bio process: subsequent use of nanoscale zero-valent iron and bioremediation approaches. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:41110-41124. [PMID: 35091952 DOI: 10.1007/s11356-022-18857-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 01/21/2022] [Indexed: 06/14/2023]
Abstract
The effectiveness of the nano/bio process was investigated as a remediation option for co-contaminated soils. Nano/bio process is a hybrid treatment method that may be defined as the use of nanoscale zero-valent iron (nZVI) and bioremediation approaches subsequently/concurrently. Different bioremediation approaches (bioattenuation, biostimulation, and/or bioaugmentation) were performed together with nZVI application to remediate Pb- and diesel fuel-spiked soils. Nutrient (N and P) and activated sludge amendment were made to realize biostimulation and bioaugmentation, respectively. The nZVI application decreased the total percentage of the most mobile and bioavailable soil Pb fractions (exchangeable and carbonate-bound) from 68.3 to 31.7%. The biodegradation levels of nZVI-applied co-contaminated soils were significantly higher than the soils without nZVI indicating the positive effect of the reduced mobility, bioavailability, and toxicity of Pb content. The use of nano/biostimulation or nano/bioaugmentation treatments resulted in higher than 60% total n-alkane degradation, whereas 89.5% degradation was obtained by using nano/biostimulation + bioaugmentation. Hydrocarbon-degrader strains belonging to phyla Actinobacteria, Proteobacteria, or Firmicutes were identified from samples subjected to nano/bio process and the strains from biostimulation and bioaugmentation treatments were different. These results indicate that the stress on the microbial population caused by the co-contamination might be subsided and the biodegradation of alkanes might be improved by using the nano/bio process.
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Affiliation(s)
- Bekir Fatih Kahraman
- Department of Environmental Engineering, Zonguldak Bulent Ecevit University, Zonguldak, 67100, Turkey.
| | - Ahmet Altin
- Department of Environmental Engineering, Zonguldak Bulent Ecevit University, Zonguldak, 67100, Turkey
| | - Nizamettin Ozdogan
- Department of Environmental Engineering, Zonguldak Bulent Ecevit University, Zonguldak, 67100, Turkey
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14
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Improvement of As(V) Adsorption by Reduction of Granular to Micro-Sized Ferric Hydroxide. Processes (Basel) 2022. [DOI: 10.3390/pr10051029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/10/2022] Open
Abstract
The remediation of groundwater containing arsenic is a problem that has been addressed using adsorption processes with granulated materials in columns, but the remediation itself could be improved by using micro-sized adsorbents in stirred systems. In this study, arsenate (As(V)) batch adsorption experiments were performed using granular ferric hydroxide (GFH) and two derived micro-sized materials. Reduced-size adsorbents were produced by energetic ball milling, giving final sizes of 0.1–2 µm (OF-M samples) and ultra-sonication, producing final sizes of 2–50 µm (OF-U samples). Equilibrium isotherm studies showed that the Langmuir model was a good fit for the three sorbents, with the highest maximum adsorption capacity (qmax) for OF-U and the lowest for OF-M. The adsorption of the two groundwater samples occurred according to the obtained equilibrium isotherms and indicated the absence of interfering agents for the three adsorbents. Batch kinetics tests in stirred beakers followed a pseudo second-order model and indicated that the kinetics of the OF-U sorbent was faster than the kinetics of the GFH sorbent. The tests also showed an increase in the qe values for the reduced-size sorbent. The application of ultrasonication to the GFH produced an increase of 23% in the qmax and b term and an increase of 34-fold for the kinetic constant (k2) in the stirred batch systems tested. These results suggest that this new approach, based on ultra-sonication, has the potential for improving the adsorption of arsenic in groundwater.
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15
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Chen WT, Chen KF, Surmpalli RY, Zhang TC, Ou JH, Kao CM. Bioremediation of trichloroethylene-polluted groundwater using emulsified castor oil for slow carbon release and acidification control. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2022; 94:e1673. [PMID: 34861087 DOI: 10.1002/wer.1673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 10/05/2021] [Accepted: 10/26/2021] [Indexed: 06/13/2023]
Abstract
In this study, the emulsified castor oil (ECO) substrate was developed for a long-term supplement of biodegradable carbon with pH buffering capacity to anaerobically bioremediate trichloroethylene (TCE)-polluted groundwater. The ECO was produced by mixing castor oil, surfactants (sapindales and soya lecithin [SL]), vitamin complex, and a citrate/sodium phosphate dibasic buffer system together for slow carbon release. Results of the emulsification experiments and microcosm tests indicate that ECO emulsion had uniform small droplets (diameter = 539 nm) with stable oil-in-water characteristics. ECO had a long-lasting, dispersive, negative zeta potential (-13 mv), and biodegradable properties (viscosity = 357 cp). Approximately 97% of TCE could be removed with ECO supplement after a 95-day operational period without the accumulation of TCE dechlorination byproducts (dichloroethylene and vinyl chloride). The buffer system could neutralize acidified groundwater, and citrate could be served as a primary substrate. ECO addition caused an abrupt TCE adsorption at the initial stage and the subsequent removal of adsorbed TCE. Results from the next generation sequences and real-time polymerase chain reaction (PCR) indicate that the increased microbial communities and TCE-degrading bacterial consortia were observed after ECO addition. ECO could be used as a pH-control and carbon substrate to enhance anaerobic TCE biodegradation effectively. PRACTITIONER POINTS: Emulsified castor oil (ECO) contains castor oil, surfactants, and buffer for a slow carbon release and pH control. ECO can be a long-term carbon source for trichloroethylene (TCE) dechlorination without causing acidification. TCE removal after ECO addition is due to adsorption and reductive dechlorination mechanisms.
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Affiliation(s)
- Wei-Ting Chen
- Institute of Environmental Engineering, National Sun Yat-Sen University, Taiwan
| | - Ku-Fan Chen
- Department of Civil Engineering, National Chi Nan University, Taiwan
| | - Rao Y Surmpalli
- Global Institute for Energy, Environment and Sustainability, Lenexa, Kansas, USA
| | - Tian C Zhang
- Department of Civil & Environmental Engineering, University of Nebraska-Lincoln, Omaha, Nebraska, USA
| | - Jiun-Hau Ou
- Institute of Environmental Engineering, National Sun Yat-Sen University, Taiwan
| | - Chih-Ming Kao
- Institute of Environmental Engineering, National Sun Yat-Sen University, Taiwan
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16
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Baragaño D, R Gallego JL, Forján R. Short-term experiment for the in situ stabilization of a polluted soil using mining and biomass waste. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 296:113179. [PMID: 34265663 DOI: 10.1016/j.jenvman.2021.113179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 06/16/2021] [Accepted: 06/26/2021] [Indexed: 06/13/2023]
Abstract
Mining and biomass waste were used to remediate a brownfield affected by As, Cd, Cu, Pb and Zn pollution in a pilot scale experiment, and a plant used for phytoremediation purposes was used as an indicator of possible toxicological effects. To carry out the experiments, plots in field conditions were treated with magnesite (mining waste), magnesite-sludge compost, and magnesite-biochar respectively, while untreated soil was used as a control. The plots were then irrigated and left for one week, after which seeds of the ryegrass Lolium perenne L. were sown. Soil properties such as metal(loid) availability, pH, phosphorus availability, total nitrogen, organic carbon, and nutrients were monitored for two months. Finally, the ryegrass was harvested and pollutant concentrations were analyzed in the aerial parts. Magnesite proved to be an excellent amendment for metal(loid) immobilization, although the notable increase in soil pH and Mg content inhibited plant growth. However, the application of magnesite in combination with the sludge compost (rich in N and P) favored plant growth and also immobilized metals, although As availability increased. In contrast, the analysis of plants in this treatment revealed lower As and metal concentrations than those grown in the untreated soil. In turn, the application of magnesite and biochar was also effective in reducing metal(loid) availability; however, the plants did not grow under these conditions, probably due to the low N and P content of biochar. In this regard, the combined application of mining waste and sludge compost emerges as a useful nature-based solution for soil remediation in the context of the circular economy.
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Affiliation(s)
- Diego Baragaño
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, Campus de Mieres, Universidad de Oviedo, Mieres, Asturias, Spain.
| | - José Luis R Gallego
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, Campus de Mieres, Universidad de Oviedo, Mieres, Asturias, Spain
| | - Rubén Forján
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, Campus de Mieres, Universidad de Oviedo, Mieres, Asturias, Spain
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17
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Staicu LC, Wόjtowicz PJ, Baragaño D, Pόsfai M, Molnár Z, Ruiz-Agudo E, Gallego JLR. Bioremediation of a polymetallic, arsenic-dominated reverse osmosis reject stream. Lett Appl Microbiol 2021; 75:1084-1092. [PMID: 34608662 DOI: 10.1111/lam.13578] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/13/2021] [Accepted: 09/30/2021] [Indexed: 12/01/2022]
Abstract
The treatment of metal-laden industrial effluents by reverse osmosis is gaining in popularity worldwide due to its high performance. However, this process generates a polymetallic concentrate (retentate) stream in need of efficient post-treatment prior to environmental discharge. This paper presents results on the bioremediation (in batch mode) of a metal-laden, arsenic-dominated retentate using Shewanella sp. O23S as inoculum. The incubation of the retentate for 14 days under anoxic conditions resulted in the following removal yields: As (8%), Co (11%), Mo (3%), Se (62%), Sb (30%) and Zn (40%). The addition of 1 mmol l-1 cysteine increased the removal rate as follows: As (27%), Co (80%), Mo (78%), Se (88%), Sb (83%) and Zn (90%). The contribution of cysteine as a source of H2 S to enhancing the removal yield was confirmed by its addition after 7 days of incubations initially lacking it. Additionally, the cysteine-sourced H2 S was confirmed by its capture onto headspace-mounted Pb-acetate test strips that were analysed by X-ray diffraction. We show that real metal-laden industrial effluents can be treated to medium-to-high efficiency using a biological system (naturally sourced inocula) and inexpensive reagents (yeast extract, lactate and cysteine).
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Affiliation(s)
- L C Staicu
- Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - P J Wόjtowicz
- Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - D Baragaño
- Environmental Biogeochemistry & Raw Materials Group and INDUROT, University of Oviedo, Mieres, Spain
| | - M Pόsfai
- Research Institute of Biomolecular and Chemical Engineering, Nanolab, University of Pannonia, Veszprém, Hungary
| | - Z Molnár
- Research Institute of Biomolecular and Chemical Engineering, Nanolab, University of Pannonia, Veszprém, Hungary
| | - E Ruiz-Agudo
- Department of Mineralogy and Petrology, University of Granada, Granada, Spain
| | - J L R Gallego
- Environmental Biogeochemistry & Raw Materials Group and INDUROT, University of Oviedo, Mieres, Spain
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