Article
Environmental Sciences
Yangqing Wang, Yu Lei, Xi Liu, Liyan Song, Naima Hamid, Rui Zhang
Summary: The study evaluated the levels of tetracyclines (TCs) and sulfonamides (SAs) in landfill leachates from seven Chinese Municipal Solid Waste (MSW) sites. The results showed that antibiotic concentrations were higher in 2017 compared to 2018, and levels were higher in spring and winter seasons. Sulfonamide antibiotics presented a higher risk, while tetracyclines had insignificant risk.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Lahiru Lindamulla, Nadeeshani Nanayakkara, Maazuza Othman, Shameen Jinadasa, Gemunu Herath, Veeriah Jegatheesan
Summary: This review assesses the leachate quality from waste disposal sites in the tropical climate zone. The analysis reveals that young sites in the tropical rainforest and tropical monsoon zones have higher pollution potential, while the pollution potential in the tropical savanna zone does not show significant differences based on the age of the landfill. Open dumpsites pose higher pollution potential due to their operating method.
CURRENT POLLUTION REPORTS
(2022)
Article
Environmental Sciences
Yangqing Wang, Rui Zhang, Yu Lei, Liyan Song
Summary: This study reveals the presence of abundant antibiotics and antibiotic resistance genes in landfills and landfill leachate, posing a significant threat to the environment. The study focuses on the seasonal variation of three specific antibiotic resistance genes (sulI, tetO, and tetW) in Chinese municipal solid waste landfill leachates over two years. The study also identifies the bacterial hosts of these resistance genes and evaluates their risk levels. The results demonstrate the high health risk associated with antibiotic resistance in landfills, particularly in genes that are abundant in the human-associated environment, have gene mobility, and possess pathogenicity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Lijuan Liu, Lu Shi, Pu Li, Xinxin Ma, Xinyao Hou, Sijin Jiang, Jia Lv, Hongmei Xu, Yue Cheng, Bei Han
Summary: This study aimed to accurately assess the potential threat of landfill-leachate to the surrounding environment by investigating the potential association among microbiota structure, antibiotic resistance genes distribution, and biological toxicity of landfill-leachate according to seasonal change. The results showed that leachate in the second quarter had the highest biotoxicity, and the dominant microbiota consisted of Proteobacteria and several genera with antibiotic resistance genes. These findings highlight the potential threat of leachate to the surrounding environment and call for more attention.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Engineering, Environmental
Vinay Kumar, Neha Sharma, Mridul Umesh, Pritha Chakraborty, Komalpreet Kaur, Lucky Duhan, Suma Sarojini, B. Thazeem, Ritu Pasrija, Alisa S. Vangnai, Subhrangsu Sundar Maitra
Summary: Landfill waste disposal has become popular in recent decades due to its easy and cost-effective nature for managing waste. However, the heterogeneity of the waste makes it difficult to predict the fate of pollutants, making bio-monitoring and specific treatment challenging. One major issue associated with landfill treatment is leachate, which poses a greater risk of soil and groundwater pollution. The presence of diverse micropollutants in landfill leachates, including microbial pathogens, pesticides, microplastics, pharmaceuticals, and other harmful chemicals, calls for improved methods for their treatment and removal.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Bahar Yavuzturk Gul, Hazal Gulhan, Suleyman Soyel, Recep Kaya, Mustafa Evren Ersahin, Suleyman Ovez, Ismail Koyuncu
Summary: This study evaluates the performance of a long-term full-scale membrane bioreactor (MBR) in treating landfill leachate and analyzes the influence of leachate structure and operational conditions on filamentous bacteria overgrowth. The system showed high removal efficiencies for chemical oxygen demand (COD) and NH4-N, but incomplete denitrification occurred at low F/M ratios. The high C/N ratio increased the frequency of small flocs, and a poor to medium microbial community diversity was observed. The identified filamentous organisms included Haliscomenobacter hydrossis, Microthrix parvicella, and Type 021N. This study provides pioneering perspectives into landfill leachate remediation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Yuqian Li, Junwei Ma, Yuqing Ren, Yijia Li, Dongbei Yue
Summary: Factors such as fine BA particles, low pH values, high temperature, and ratios of leachate to BA solids were found to contribute to calcium leaching. The study also revealed that calcium leaching was higher in actual leachate compared to simulated leachate.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Nandini Bhambore, M. Suresh Kumar
Summary: This study investigated the characteristics of urban leachate and found that improper waste management practices led to the generation of large quantities of contaminated liquid. Analysis of the leachate revealed seasonal variations and highlighted the potential contamination of the landfill leachate.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Environmental Sciences
Zhepei Gu, Ke Feng, Yihui Li, Qibin Li
Summary: Informal landfills can lead to leachate pollution, impacting the microbial diversity and composition in contaminated soil. Firmicutes dominate in contaminated soil, affecting the ecological functions of soil. Network analysis shows keystone taxa like Bacilli and Clostridia play a vital role in maintaining soil stability.
Article
Agricultural Engineering
Anusree Nalladiyil, Prerana Prakash, G. L. Sivakumar Babu
Summary: The study evaluates the efficacy of four different garbage enzymes prepared from fruit peels (pineapple, banana, orange, and lemon) in removing soluble chemical oxygen demand (sCOD) from landfill leachate at two temperatures (room temperature and higher temperature). The results showed that orange (10%) and lemon (15%) garbage enzymes had the highest sCOD reduction at room temperature. The study demonstrated that the garbage enzyme could increase the bioavailability of organics in leachate.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Jianwei Liu, Jianbin Sun, Chen Lu, Peng Yue, Xinyue Kang, Xueli Liu
Summary: The study found that LPB and NPB showed better removal efficiency for different bacteria and fungi when the IFR was higher. The proportion of dominant microorganisms with large particle size in the bioaerosols significantly reduced after LPB and NPB, especially under higher WCR.
Article
Environmental Sciences
L. M. L. K. B. Lindamulla, N. K. R. N. Jayawardene, W. S. M. S. K. Wijerathne, M. Othman, K. G. N. Nanayakkara, K. B. S. N. Jinadasa, G. B. B. Herath, V Jegatheesan
Summary: This study describes the collection and characterization of landfill leachate from different climatic zones in Sri Lanka. Membrane bioreactors (MBRs) with different configurations were used to treat the leachate, and the optimal operating conditions for the treatment were determined. The study highlights the capabilities of MBR in treating landfill leachate.
Article
Engineering, Environmental
Hekai Zhang, Yutao Chen, Yalan Liu, John A. Bowden, Timothy G. Townsend, Helena M. Solo-Gabriele
Summary: This study evaluated the association between changes in physical-chemical parameters of leachate in on-site treatment systems and changes in PFAS concentrations. The results showed that RO systems significantly reduced both physical-chemical parameters and PFAS concentrations. Correlations were observed between changes in parameters and pH, alkalinity, ammonia, and metals.
Review
Chemistry, Multidisciplinary
Sonil Nanda, Franco Berruti
Summary: The USA, China, and India are the top producers of municipal solid waste, with waste composition varying based on income levels. Municipal solid waste management options include recycling, incineration, waste-to-energy conversion, composting, or landfilling. Landfilling is a preferred method globally, with critical factors for sustainability including liners, soil cover thickness, leachate collection, and gas recovery facilities. Landfills act as ecological reactors undergoing various transformations, with bioreactor landfills emerging as a next-generation solution for efficient waste stabilization through controlled recirculation.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Review
Microbiology
Yesenia Mendoza-Burguete, Maria de la Luz Perez-Rea, J. Ledesma-Garcia, Juan Campos-Guillen, M. A. Ramos-Lopez, C. Guzman, J. A. Rodriguez-Morales
Summary: This systematic review examines the current research on soil contaminants, specifically leachate from solid waste landfills, and emphasizes biological remediation. The study analyzes data on pollutant treatment by microorganisms and their results worldwide. Factors such as soil type, pollutant type, bacterial type, and study locations were considered. The review provides reliable global data on soil contamination, particularly by leachate from municipal landfills, and highlights the importance of considering various factors when selecting a viable remediation strategy.