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Huang Z, Liu G, Zhang Y, Yuan Y, Xi B, Tan W. Assessing the impacts and contamination potentials of landfill leachate on adjacent groundwater systems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172664. [PMID: 38653413 DOI: 10.1016/j.scitotenv.2024.172664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 04/07/2024] [Accepted: 04/19/2024] [Indexed: 04/25/2024]
Abstract
Landfilling is a globally prevalent method for managing municipal solid waste disposal. Nonetheless, the potential for serious contamination and the significant regional disparities in the leachate produced pose varying degrees of risks to groundwater quality. Previous studies have focused on a single landfill or the same geo-climatic conditions, with a limited number of samples having resulted in a narrow distribution of landfill age and scale, which prevents the description of the pattern of change in landfill age and scale. As well as the effect of this change on the contaminants in the landfill leachate and surrounding groundwater is still unclear. Therefore, we sampled and analyzed leachate and surrounding groundwater from 62 landfills with different landfill ages, scales, and operating conditions in a region with dense and varied topography and climate. Aim to explore the effects of different landfill ages, scales, and operating conditions on contaminants in leachate and surrounding groundwater. Findings indicate that pollutant profiles in different media are influenced by the age, scale, and operational status of the landfill, and the impact of leachate on pollutant types and concentrations in groundwater is limited. A significant correlation exists between the concentration of contaminants in the groundwater affected by leaching from the impermeable layer and the age and scale of the landfill when compared to the leachate. The contamination potentials posed by different pollutants vary across environmental media. Total dissolved solids and NH4+-N in leachate presented high contamination potentials, whereas elemental metalloids (Mn, Al, Ba, and Fe) in the surrounding groundwater posed high environmental concerns. These insights furnish new avenues for monitoring, identification, and safeguarding against pollutants in landfills and proximate groundwater, which is imperative for the sustainable management of municipal waste.
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Affiliation(s)
- Zhi Huang
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China; Anhui Academy of Ecological and Environmental Sciences, Hefei 230061, China
| | - Guijian Liu
- School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
| | - Yifan Zhang
- State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; College of Water Sciences, Beijing Normal University, Beijing 100875, China.
| | - Ying Yuan
- State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Beidou Xi
- State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; College of Water Sciences, Beijing Normal University, Beijing 100875, China
| | - Wenbing Tan
- State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
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Fernandes Sales Junior S, Oliveira Souza Soares L, Pinheiro Cunha D, Ernesto Taveira Parente C, Ferreira Mannarino C, Veríssimo Correia F, Mendes Saggioro E. Biomarker response index in earthworms following chronic exposure to leachate from a closed dumpsite: Behavioral, cytotoxicity and antioxidant system alterations. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 351:119990. [PMID: 38183952 DOI: 10.1016/j.jenvman.2023.119990] [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: 09/04/2023] [Revised: 12/04/2023] [Accepted: 12/28/2023] [Indexed: 01/08/2024]
Abstract
Leachate, an effluent produced during solid waste decomposition, interacts directly with soil, mainly in dumpsite areas. Studies on terrestrial animal exposure to leachate are, however, lacking. Plants are the most frequently studied organisms, while animal studies, especially earthworms, are limited. Nevertheless, ecotoxicological assessments involving earthworms are crucial due to their role in soil health and ecosystem maintenance, which are paramount in understanding potential terrestrial ecosystem leachate effects. In this context, this study aimed to evaluate behavioral effects, sublethal cytotoxicity and antioxidant system alterations in Eisenia andrei earthworms chronically exposed to leachate from a closed dumpsite. Cytotoxicity was determined by coelomocyte density, viability and cell typing, while antioxidant system alterations were assessed through superoxide dismutase (SOD), catalase (CAT), glutathione-S-transferase (GST), reduced glutathione (GSH) and metallothionein (MT) determinations. Malondialdehyde (MDA) and protein carbonylation (PTC) levels were also determined as oxidative effect markers. Finally, the Biomarker Response Index (BRI) was assessed, aiming to quantitatively integrate the results of the investigated endpoints and establish a biological health state (BHS) for each leachate concentration. Leachate exposure led to leak responses at concentrations of up to 50%, but attraction at higher concentrations. Decreased cell density (28%) was observed after 48 days and reduced viability (50%), after 14 days of leachate exposure. The observed cell typing changes indicate anti-inflammatory immune system effects. Leachate exposure led to several antioxidant system alterations, increasing SOD (2-6 %), CAT (5-35 %) and GST (5-70 %) activities and GSH (7-37%) and MT (3-67%) levels. Earthworm antioxidant defenses were, however, able to prevent lipid peroxidation, which decreased (11-37%) following leachate exposure to concentrations above 12.5%, and PTC, which increased at 42 days (26%) and reduced at 56 days (12 %). This is the first PTC assessment in leachate-exposed earthworms. The increased carbonylation levels observed after 42 days alongside MDA decreases highlight the need for further research employing oxidative effect biomarkers other than MDA. Finally, an integrated approach employing the BRI was carried out, revealing mild initial changes evolving to moderate to major effects at the highest leachate exposure concentration, with an effect attenuation detected at the end of the experiment. In this sense, this study brings forth a significant novelty, employing a biomarker previously not assessed in earthworms, demonstrating an oxidative effect, alongside the use of the BRI as an integrative tool for the endpoints applied in this assessment.
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Affiliation(s)
- Sidney Fernandes Sales Junior
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil 4365, 21045-900, Rio de Janeiro, RJ, Brazil
| | - Lorena Oliveira Souza Soares
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil 4365, 21045-900, Rio de Janeiro, RJ, Brazil; Programa de Pós-Graduação em Saúde Pública e Meio Ambiente, Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Davi Pinheiro Cunha
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil 4365, 21045-900, Rio de Janeiro, RJ, Brazil
| | - Cláudio Ernesto Taveira Parente
- Laboratório de Radioisótopos Eduardo Penna Franca, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, 21941-900, Rio de Janeiro, RJ, Brazil
| | - Camille Ferreira Mannarino
- Laboratório de Virologia Comparada e Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil 4365, 21045-900, Rio de Janeiro, RJ, Brazil
| | - Fábio Veríssimo Correia
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil 4365, 21045-900, Rio de Janeiro, RJ, Brazil; Programa de Pós-Graduação em Saúde Pública e Meio Ambiente, Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil; Programa de Pós-Graduação em Ciências Biológicas (Biodiversidade Neotropical), Departamento de Ciências Naturais, Universidade Federal do Estado do Rio de Janeiro, Av. Pasteur 458, 22290-20, Urca, Rio de Janeiro, Brazil; Departamento de Ciências Naturais, Universidade Federal do Estado do Rio de Janeiro, Av. Pasteur, 458, 22290-20, Urca, Rio de Janeiro, Brazil
| | - Enrico Mendes Saggioro
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil 4365, 21045-900, Rio de Janeiro, RJ, Brazil; Programa de Pós-Graduação em Saúde Pública e Meio Ambiente, Escola Nacional de Saúde Pública Sergio Arouca, Fundação Oswaldo Cruz, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil.
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Mendoza-Burguete Y, de la Luz Pérez-Rea M, Ledesma-García J, Campos-Guillén J, Ramos-López MA, Guzmán C, Rodríguez-Morales JA. Global Situation of Bioremediation of Leachate-Contaminated Soils by Treatment with Microorganisms: A Systematic Review. Microorganisms 2023; 11:microorganisms11040857. [PMID: 37110280 PMCID: PMC10145224 DOI: 10.3390/microorganisms11040857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 03/30/2023] Open
Abstract
This systematic review presents the current state of research in the last five years on contaminants in soils, especially in leachates from solid waste landfills, with emphasis on biological remediation. In this work, the pollutants that can be treated by microorganisms and the results obtained worldwide were studied. All the data obtained were compiled, integrated, and analyzed by soil type, pollutant type, bacterial type, and the countries where these studies were carried out. This review provides reliable data on the contamination of soils worldwide, especially soils contaminated by leachate from municipal landfills. The extent of contamination, treatment objectives, site characteristics, cost, type of microorganisms to be used, and time must be considered when selecting a viable remediation strategy. The results of this study can help develop innovative and applicable methods for evaluating the overall contamination of soil with different contaminants and soil types. These findings can help develop innovative, applicable, and economically feasible methods for the sustainable management of contaminated soils, whether from landfill leachate or other soil types, to reduce or eliminate risk to the environment and human health, and to achieve greater greenery and functionality on the planet.
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Tőzsér D, Mizser S, Karaffa K, Málik-Roffa H, Magura T. A meta-analysis-based evaluation of metallic element accumulation in earthworms. ENVIRONMENT INTERNATIONAL 2022; 169:107546. [PMID: 36183488 DOI: 10.1016/j.envint.2022.107546] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 08/25/2022] [Accepted: 09/25/2022] [Indexed: 06/16/2023]
Abstract
The responses of earthworms to excess soil element concentrations are well studied. However, published information on the metallic element accumulation in individuals is controversial. In this paper, the published data on earthworm As, Cd, Cr, Cu, Ni, Pb, and Zn whole body concentrations were evaluated in individuals collected from contaminated and uncontaminated (control) soils, using meta-analyses. The role of soil pH and exposure time as potential influencing factors on metal accumulation was also assessed. Based on the evaluations, the accumulation of each metallic element was significantly (p < 0.05) more intensive in individuals collected from contaminated soils than in ones from control soils, with minor differences in the order of accumulation intensity among the studied metallic elements. Further, major interspecific differences were indicated in the accumulation, with different species being the most intensive accumulators for individual metallic elements. Among the studied metals, Cu concentration in earthworm bodies increased significantly with increasing soil pH. As for the exposure time-dependent accumulation, Pb concentration was found to decrease significantly with time in whole body tissues of earthworms. These results suggested a high variability in metal- and species-specific accumulation-excretion patterns of earthworms, influenced also by other external factors. Based on the results highlighted in this meta-analysis, accumulation schemes raise the need for further analyses involving other additional variables (e.g., soil type, organic matter content, climatic condition) to get a better understanding of element cycle-earthworm relations.
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Affiliation(s)
- Dávid Tőzsér
- Department of Ecology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Szabolcs Mizser
- Department of Ecology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; MTA-DE Biodiversity and Ecosystem Services Research Group, Egyetem tér 1, H-4032 Debrecen, Hungary.
| | - Katalin Karaffa
- Department of Ecology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Hajnalka Málik-Roffa
- Department of Ecology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; MTA-DE Biodiversity and Ecosystem Services Research Group, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Tibor Magura
- Department of Ecology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; ELKH-DE Anthropocene Ecology Research Group, Egyetem tér 1, H-4032 Debrecen, Hungary
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da Silva EM, Gomes NA, do Nascimento SC, Nóbrega BMDA, de Melo MC, Monteiro VED. Ecotoxicological responses of Daphnia magna and Eisenia andrei in landfill leachate. ECOTOXICOLOGY (LONDON, ENGLAND) 2022; 31:1299-1309. [PMID: 36136137 DOI: 10.1007/s10646-022-02587-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/06/2022] [Indexed: 06/16/2023]
Abstract
Leachate toxicity using bioindicators such as microcrustaceans and earthworms has not been fully elucidated. These bioindicators are traditionally determined through physicochemical and microbiological analyses. The ecotoxicological assessment of leachate using indicator organisms from different environments is a technique to ensure the treatment and safe disposal of this effluent with minimum impact on human health and the environment. The current study aimed to evaluate the ecotoxicological responses of Daphnia magna and Eisenia andrei in landfill leachate, identifying which organism was more sensitive to this effluent. The leachate used in ecotoxicological tests was collected at the Campina Grande Sanitary Landfill (ASCG), Paraíba, Brazil. The leachate sample contained a high content of organic matter in the form of chemical oxygen demand (19496.86 mg.L-1) and ammoniacal nitrogen (2198.00 mg.NL-1), in addition to metals with carcinogenic potential, such as Cr (0.64 mg.L-1) and Fe (1.16 mg.L-1). The exposure of Daphnia magna to the leachate showed that the effluent is harmful to aquatic organisms, obtaining an EC 50, 48 h = 1.22%, FT of 128 and a TU of 81.96%. Among the contaminant concentrations tested in Eisenia andrei, 57% (59.28 mL.kg-1) caused the highest lethality, causing the death of 21 earthworms within 72 hours of exposure. The avoidance test showed that exposure to leachate concentrations between 10.38 and 39.86 mL.kg-1 led to the leakage of earthworms, and habitat loss was observed at a concentration of 55.80 mL.kg-1, in which leak response (LR) ≥80% was obtained. This study demonstrates that the mentioned organisms are suitable for ecotoxicological tests in landfill leachate. Moreover, the microcrustacean Daphnia magna showed the most significant sensitivity, presenting a rapid ecotoxicological response to the leachate.
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Affiliation(s)
- Elisângela Maria da Silva
- Department of Civil and Environmental Engineering, Universidade Federal de Campina Grande, Campina Grande, 58410050, Brazil
| | - Naiara Angelo Gomes
- Department of Civil and Environmental Engineering, Universidade Federal de Campina Grande, Campina Grande, 58410050, Brazil
| | - Samanda Costa do Nascimento
- Department of Civil and Environmental Engineering, Universidade Federal de Campina Grande, Campina Grande, 58410050, Brazil
| | | | - Márcio Camargo de Melo
- Department of Civil Engineering, Universidade Federal de Campina Grande, Campina Grande, 58175000, Brazil
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Zeng Y, Chen Z, Du Y, Lyu Q, Yang Z, Liu Y, Yan Z. Microbiologically induced calcite precipitation technology for mineralizing lead and cadmium in landfill leachate. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 296:113199. [PMID: 34271357 DOI: 10.1016/j.jenvman.2021.113199] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 06/22/2021] [Accepted: 06/29/2021] [Indexed: 06/13/2023]
Abstract
As a new bioremediation technology for toxic metals, microbiologically induced calcite precipitation (MICP) is gradually becoming a research focus. This study investigated the application of MICP to mineralize toxic metals (lead and cadmium) in landfill leachate for the first time. In the experiment of remediating synthetic landfill leachate (SLL) contaminated by Pb2+, 100% of the 20 mg/L Pb2+ was removed when the maximum urease activity was only 20.96 U/ml. Scanning electron microscopy and energy dispersive spectroscopy (SEM-EDS) and laser particle size characterizations of the precipitates indicate the formation of agglomerated square particles, 76.9% of which had sizes that ranged from 33.93 to 57.06 μm. Fourier transform infrared spectroscopic and X-ray diffraction analyses confirmed that the precipitates consisted predominantly of calcite crystals, and the unit cell lattice constants of the precipitates (a = b = 4.984 Å, c = 17.171 Å) matched those of calcite, while lead was fixed as hydrocerussite. In addition, the Pb-MICP precipitates were stable under continuous acid degradation (pH = 5.5), and only 1.76% of the lead was released after 15 days. In the verification test of toxic metals remediation in a real landfill leachate (RLL), all of the Pb2+ and Cd2+ (initial concentrations: Pb2+ = 25 mg/L; Cd2+ = 5.6205 mg/L) was mineralized simultaneously, which further confirmed the feasibility of MICP for toxic metal remediation in landfill leachate. However, optimizing the urea dosage and combining the ammonium recovery are necessary strategies required for improving the economic and environmental benefits of the MICP process.
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Affiliation(s)
- Yong Zeng
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, 210023, PR China.
| | - Zezhi Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, 210023, PR China.
| | - Yaling Du
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, PR China
| | - Qingyang Lyu
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, PR China
| | - Ziyi Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing, 210023, PR China
| | - Yang Liu
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, PR China
| | - Zhiying Yan
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, PR China.
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Sales Junior SF, Costa Amaral IC, Mannarino CF, Hauser-Davis RA, Correia FV, Saggioro EM. Long-term landfill leachate exposure modulates antioxidant responses and causes cyto-genotoxic effects in Eisenia andrei earthworms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 287:117351. [PMID: 34000669 DOI: 10.1016/j.envpol.2021.117351] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/06/2021] [Accepted: 05/09/2021] [Indexed: 06/12/2023]
Abstract
It is estimated that approximately 0.4% of the total leachate produced in a landfill is destined for treatment plants, while the rest can reach the soil and groundwater. In this context, this study aimed to perform leachate toxicity evaluations through immune system cytotoxic assessments, genotoxic (comet assay) appraisals and antioxidant system (superoxide dismutase - SOD; catalase - CAT, glutathione-S-transferase - GST; reduced glutathione - GSH and metallothionein - MT) evaluations in Eisenia andrei earthworms exposed to a Brazilian leachate for 77 days. The leachate sample contained high organic matter (COD - 10,630 mg L-1) and ammoniacal nitrogen (2398 mg L-1), as well as several metals, including Ca, Cr, Fe, Mg, Ni and Zn. Leachate exposure resulted in SOD activity alterations and increased CAT activity and MT levels. Decreased GST activity and GSH levels were also observed. Antioxidant system alterations due to leachate exposure led to increased malondialdehyde levels as a result of lipid peroxidation after the 77 day-exposure. An inflammatory process was also observed in exposed earthworms, evidenced by increased amoebocyte density, and DNA damage was also noted. This study demonstrates for the first time that sublethal effect assessments in leachate-exposed earthworms comprise an important tool for solid waste management.
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Affiliation(s)
- Sidney Fernandes Sales Junior
- Center of Studies on Worker's Health and Human Ecology, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Isabele Campos Costa Amaral
- Center of Studies on Worker's Health and Human Ecology, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Camille Ferreira Mannarino
- Sanitation and Environment Health Department, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Rachel Ann Hauser-Davis
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, 21040-360, Rio de Janeiro, Brazil
| | - Fábio Veríssimo Correia
- UNIRIO,Departamento de Ciências Naturais, Av. Pasteur, 458, Urca, 22290-20, Rio de Janeiro, Brazil
| | - Enrico Mendes Saggioro
- Center of Studies on Worker's Health and Human Ecology, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil; Sanitation and Environment Health Department, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil.
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Zhang J, Zhang JM, Xing B, Liu GD, Liang Y. Study on the effect of municipal solid landfills on groundwater by combining the models of variable leakage rate, leachate concentration, and contaminant solute transport. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 292:112815. [PMID: 34020308 DOI: 10.1016/j.jenvman.2021.112815] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 05/13/2021] [Accepted: 05/16/2021] [Indexed: 06/12/2023]
Abstract
The landfill with low economic cost and technical barrier has become a popular option for municipal solid waste treatment, but it is likely to seriously pollute groundwater by solute leaching. In this study, the pollutants concentration model, leakage rate model, and the solute transport model were coupled to investigate the effect of municipal solid waste landfill on groundwater quality. Major results obtained are, (1) the leakage rate of leachate differs significantly among the landfilling stage, covering stage and completely covered stage as the leachate depth varies with the infiltration rainfall. The contact condition between HDPE and CCL was found to be a key factor in determining the leakage rate of leachate. Ensuring good connection between HPDE and CCL is thus critical in protecting groundwater from being polluted by landfill. (2) The NH3-N as a proxy for organic pollutants was generated via the degradation process, and Cl- as a proxy for inorganic pollutants is a leachable fraction of mobilized substances. The concentration of Cl- is higher than that of NH3-N before 7600 days, then the concentration of NH3-N becomes roughly stable while that of Cl- continues to decrease. (3) The load of NH3-N as a proxy for organic pollutants declines linearly downwards before the completely covering stage. The load of Cl- as a proxy for inorganic pollutants increased during the first five years, and then declined. (4) In the case study, the path of maximum pollutants concentration is perpendicular to the groundwater contour, and the maximum pollutants concentration has two peaks, occurring on 7106 days and 11,554 days, respectively. The change laws of maximum pollutants concentration are similar for different connections between HPDE and CCL.
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Affiliation(s)
- Jing Zhang
- College of He Hai, Chong Qing Jiao Tong University, Chongqing, 400074, China; State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China.
| | - Jian-Min Zhang
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
| | - Bing Xing
- College of He Hai, Chong Qing Jiao Tong University, Chongqing, 400074, China
| | - Guo-Dong Liu
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, China
| | - Yue Liang
- College of He Hai, Chong Qing Jiao Tong University, Chongqing, 400074, China
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Sales Junior SF, Mannarino CF, Bila DM, Taveira Parente CE, Correia FV, Saggioro EM. Lethal and long-term effects of landfill leachate on Eisenia andrei earthworms: Behavior, reproduction and risk assessment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 285:112029. [PMID: 33578208 DOI: 10.1016/j.jenvman.2021.112029] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/03/2020] [Accepted: 01/18/2021] [Indexed: 06/12/2023]
Abstract
Leachate is difficult to biodegrade, and presents variable physical, chemical and biological characteristics, as well as high toxicological potential for soil, groundwater and water bodies. In this context, untreated leachate toxicity was evaluated through acute and chronic exposures in Eisenia andrei earthworms. Physico-chemical leachate characterizations indicate a complex composition, with high organic matter (COD - 10,634 mg L-1) and ammoniacal nitrogen (2388 mg L-1) concentrations. Metals with carcinogenic potential, such as Cr, As and Pb, were present at 0.60, 0.14 and 0.01 μg L-1, respectively and endocrine disrupting compounds were detected in estradiol equivalents of 660 ± 50 ng L-1. Acute tests with Eisenia andrei indicated an LC50 (72 h) of 1.3 ± 0.1 μL cm-2 in a filter paper contact test and 53.9 ± 1.3 mL kg-1 in natural soil (14 days). The EC50 in a behavioral test was estimated as 31.6 ± 6.8 mL kg-1, indicating an escape effect for concentrations ranging from 35.0 to 70.0 mL kg-1 and habitat loss from 87.5 mL kg-1 of leachate exposure. Chronic exposure (56 days) led to reproduction effects, resulting in a 4-fold decreased cocoon production and 7-fold juvenile decrease. This effect was mainly attributed to the possible presence of endocrine disrupting compounds. An estimated NOAEL of 1.7 mL L-1 and LOAEL of 3.5 mL L-1 were estimated for earthworms exposed to the assessed effluent. Extremely high-risk quotients (RQ ≥ 1) were estimated based on leachate application in irrigation. Thus, adequate municipal solid waste management is paramount, especially with regard to generated by-products, which can result in high toxicological risks for terrestrial organisms.
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Affiliation(s)
- Sidney Fernandes Sales Junior
- Center of Studies on Worker's Health and Human Ecology, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Camille Ferreira Mannarino
- Sanitation and Environment Health Department, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil
| | - Daniele Maia Bila
- Department of Sanitary and Environment Engineering, State University of Rio de Janeiro, 524 São Francisco Xavier Street, Room 5029-F, 20550-900, Rio de Janeiro, Brazil
| | - Cláudio Ernesto Taveira Parente
- Laboratório de Radioisótopos, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Av. Carlos Chagas Filho s/n, Bloco G0, 21941-902, Rio de Janeiro, Brazil
| | - Fábio Veríssimo Correia
- UNIRIO, Departamento de Ciências Naturais, Av. Pasteur, 458, Urca, 22290-20, Rio de Janeiro, Brazil.
| | - Enrico Mendes Saggioro
- Center of Studies on Worker's Health and Human Ecology, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil; Sanitation and Environment Health Department, Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Leopoldo Bulhões 1480, 21041-210, Rio de Janeiro, RJ, Brazil.
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10
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Wu L, Yan Z, Huang S, Li J, Su B, Wang C, Peng Y. Rapid start-up and stable maintenance of partial nitrification-anaerobic ammonium oxidation treatment of landfill leachate at low temperatures. ENVIRONMENTAL RESEARCH 2020; 191:110131. [PMID: 32861727 DOI: 10.1016/j.envres.2020.110131] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/09/2020] [Accepted: 08/18/2020] [Indexed: 06/11/2023]
Abstract
The current research regarding anaerobic ammonium oxidation (anammox) for the treatment of landfill leachate mainly focuses on a temperature range of 30-35 °C. However, achieving and maintaining anammox at lower temperatures would widen its application for the treatment of landfill leachate. This study, attempts to address this issue by using a combined process involving an upflow anaerobic sludge blanket (UASB), anoxic/oxic (A/O) reactor, anammox reactor (ANAOR), and anaerobic sequencing batch reactor (ASBR) to enrich anammox bacteria at relatively low temperatures. The rapid start-up of the partial nitrification-anammox process for landfill leachate treatment was achieved and maintained at 13-22 °C. The experiment was divided into phase 1 (20-22 °C) and phase 2 (13-15 °C). The results showed that 87.1% of the chemical oxygen demand (COD), 97.4-97.7% of the ammonium nitrogen (NH4+-N), and 93.3-94.7% of the total nitrogen (TN), were removed. At least 29.3% and 11.4% of NH4+-N was removed through anammox in phases 1 and 2, respectively, with an accumulation NO2--N ratio of 86.1-88.6%. Candidatus Kuenenia was the dominant anammox bacteria in the anammox process. A low temperature of 13-15 °C did not affect ammonia oxidizing bacteria (AOB), and their relative abundance in the A/O reactor ranged from 27.29% to 33.22%.
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Affiliation(s)
- Lina Wu
- Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing, 100044, China.
| | - Zhibin Yan
- Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| | - Shan Huang
- Department of Civil and Environmental Engineering, Princeton University, Princeton, 08544, USA
| | - Jin Li
- Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| | - Baiyi Su
- Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| | - Chunyan Wang
- Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Centre of Beijing, Beijing University of Technology, Beijing, 100124, China.
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