Review
Chemistry, Analytical
Moeen Gholami, Moein Besharati Fard, Mehdi Zabihzadeh, Abbas Shomali, Alireza Pendashteh, Behrooz Abbasi Souraki
Summary: Solid waste landfill is a major pollution source that harms the environment. Sulphate radical-based advanced oxidation processes have been proven effective in treating landfill leachate, but energy consumption remains a challenge.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Pradeep Kumar Singa, Mohamed Hasnain Isa, Baskaran Sivaprakash, Yeek-Chia Ho, Jun-Wei Lim, Natarajan Rajamohan
Summary: Three Fenton processes, including conventional Fenton, photo-Fenton, and electro-Fenton, were used to remove PAHs from landfill leachate. RSM and ANN were used to optimize the treatment conditions. The photo-Fenton and electro-Fenton processes showed higher removal percentages for COD and PAHs compared to the Fenton process. Elemental characterization of the resultant iron sludge revealed the presence of various elements, with oxygen being the most abundant.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Shuo Li, Yalun Yang, Heshan Zheng, Yongjie Zheng, Tao Jing, Jun Ma, Jun Nan, Yoong Kit Leong, Jo-Shu Chang
Summary: This paper summarizes the recent findings on advanced oxidation processes (AOPs) for landfill leachate treatment, focusing on the production routes and mechanisms of hydroxyl radical (·OH) and sulfate radical (SO4·-). It also highlights the challenges of using a single advanced oxidation technology for treating special leachates and the potential of synergistic combination with biological or physical methods.
Article
Engineering, Environmental
Ke Feng, Shiqi Mu, Jie Bai, Qibin Li
Summary: The study investigated the use of a microwave-enhanced Fe-C/H2O2 process for advanced treatment of biologically treated effluent, showing better removal of organic matter compared to other processes. Three-dimensional excitation and emission matrix (3D-EEM) fluorescence spectra demonstrated significant reduction in molecular condensation and molecular weight of dissolved organic matter, with humus largely destroyed and mineralized. The presence of zero-valent iron (Fe-0) and iron oxides in iron-carbon materials allowed for enhanced Fenton reactions with H2O2, further accelerated by MW radiation as an external energy source to remove organic matter from the effluent of a SAARB.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2021)
Review
Environmental Sciences
S. Kanmani, A. G. Bharathi Dileepan
Summary: This article focuses on the possibility of using photocatalytic-based advanced oxidation processes to remove recalcitrant organic pollutants from landfill leachate. It is found that conventional physico-chemical and biological treatment methods are not ideal for the removal of these pollutants. Recently, photo-assisted TiO2/ZnO oxidation has shown potential as an effective treatment for landfill leachate, greatly enhancing its reutilization. The article also emphasizes the importance of considering factors such as systematic relevance, potential conditions, characteristics, cost-effectiveness, and long-term environmental effects when selecting the best photocatalytic treatment for leachate.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Zhihong Ye, Fei Miao, Hui Zhang
Summary: This study demonstrates for the first time the feasibility of removing COD and NH4+-N from landfill leachate using an electrochemical assisted HClO/Fe2+ process. The performance of active chlorine generation at the anode was evaluated, and the coexistence of (OH)-O-center dot and (FeO2+)-O-IV in the system was confirmed. The influence of pH, Fe2+ concentration, and current density on COD and NH4+-N removal was investigated, and the reaction mechanism was proposed. The proposed process shows promise as an alternative for treating refractory landfill leachate.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Xue Zhang, Huijuan Han, Hongxing Chai, Penghao Gao, Wei Wu, Mengzhao Li, Qingxin Lv, Xianglin Guo, Qingmei Meng, Xinpeng Liu, Peiling Gao
Summary: Wastewater treatment is achieved through the regeneration of resources and energy using pre-treatment technologies. Coagulation pre-treatment of landfill leachate was performed in this study using polymeric iron sulfate (PFS) as a coagulant. The effects of PFS dosing, initial pH, and PAM dosing on the removal of COD, TP, and UV254 from the leachate were evaluated. Response surface methodology (RSM) was used to assess the individual and interactive effects of parameters on COD%, TP%, and UV254%. The optimization results showed significant removal of contaminants in the leachate, with COD%, TP%, and UV254% reaching their maximum values at specific conditions.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Antonio Faggiano, Marco De Carluccio, Francesco Cerrato, Carlos Augusto Garcia Junior, Antonio Proto, Antonino Fiorentino, Luigi Rizzo
Summary: This study used response surface methodology (RSM) to determine the optimal operating conditions of the Fenton process as a pre-treatment for landfill leachate (LL). The aim was to reduce the organic content and optimize the BOD5:TN:TP ratio. The variables Fe2+ and H2O2 concentrations significantly affected the responses, with oxidation mechanisms dominating over coagulation. The optimal conditions were Fe2+ concentration of 4262 mg/L, H2O2 concentration of 5104 mg/L (H2O2/Fe2+ molar ratio = 2), with COD, BOD5, TN, and TP removals of 70%, 67%, 84%, and 96% respectively, and improved BOD5:TN:TP ratio of 100:6:1. Furthermore, this approach minimized sludge formation and provided a useful tool for LL pre-treatment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Engineering, Environmental
Guanyi Chen, Guanyun Wu, Ning Li, Xukai Lu, Jianhui Zhao, Mengting He, Beibei Yan, Hongqiong Zhang, Xiaoguang Duan, Shaobin Wang
Summary: Persulfate (PS) oxidation technology has been widely used in the purification of landfill leachate, with advantages such as fast reaction speed, nonselectivity to target pollutants, and thorough oxidation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Wenyi Yang, Manting Ci, Lifang Hu, Zhen Shen, Chengran Fang, Yuyang Long
Summary: The sulfate reduction behavior in the waste-leachate transition zone of landfill was investigated at different temperatures and moisture contents. The study found marked differences in sulfate reduction behavior, with temperature playing a more significant role than the solid-to-liquid ratio. The microbial community composition and interactions also varied with temperature, contributing to the observed differences in sulfate reduction behavior.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Lakshmi Pisharody, Ashitha Gopinath, Milan Malhotra, P. Nidheesh, M. Suresh Kumar
Summary: Landfilling is a common method for managing municipal solid waste globally, but leachate generation poses environmental issues. Advanced oxidation processes (AOPs) show potential in removing micropollutants from landfill leachate, but further research is needed for better understanding.
Article
Engineering, Environmental
Hamza Bellouk, Mohamed Danouche, Imane El Mrabet, Karim Tanji, Fouad Khalil, Mostafa Nawdali, Naima El Ghachtouli, Hicham Zaitan
Summary: This study investigated the use of an ultrasound-photo-Fenton process (US-P-FP) for landfill leachate treatment. The results showed that the process effectively removed COD, UV254, and color from the leachate. Optimization of operating factors resulted in the highest removal efficiencies at specific conditions, and the treated leachate showed reduced phytotoxicity.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Emine Can-Guven, Senem Yazici Guvenc, Gamze Varank
Summary: This study investigated a sequential treatment of landfill leachate including coagulation and binary oxidation processes. The research optimized the chemical coagulation process and examined the factors affecting the binary oxidation process to achieve high removal efficiencies. The results showed that the binary processes were more effective than single processes, reaching significant removal efficiencies under optimal conditions.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Review
Environmental Sciences
Hamidi Abdul Aziz, Siti Fatihah Ramli, Yung-Tse Hung
Summary: Leachate generation is a challenging issue in landfills, as it carries harmful pollutants. Current solutions involve multi-stage treatments to address high concentrations of BOD, COD, colour, and NH3-N. This review paper focuses on the remediation of landfill leachate with high COD, colour, and NH3-N levels and low biodegradability, particularly in old landfills in developing countries. It also discusses a potentially sustainable landfill design and offers recommendations for future prospects, specifically in Malaysia and other developing countries with similar characteristics.
Article
Environmental Sciences
Yilin Li, Wenjia Zhang, Yun Dai, Xiaomei Su, Yeyuan Xiao, Dan Wu, Faqian Sun, Rongwu Mei, Jianrong Chen, Hongjun Lin
Summary: This study investigated the start-up, influencing factors, and stable operation of partial denitrification for treating biological effluent from landfill leachate. The research found a suitable ratio of nitrate/ammonium for downstream Anammox process, and highlighted the importance of carbon sources, COD/NO3--N ratio, and salinity in partial denitrification.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Digambar Chavan, G. S. Manjunatha, Deval Singh, Lakshmikanthan Periyaswami, Sunil Kumar, Rakesh Kumar
Summary: Open municipal solid waste dumpsites in India are significant hotspots of spontaneous fire and pollution, with the age and moisture content of waste being important factors influencing the time of spontaneous ignition.
Review
Engineering, Environmental
Ashootosh Mandpe, Sonam Paliya, Vidyadhar V. Gedam, Shubham Patel, Lakshay Tyagi, Sunil Kumar
Summary: The concept of circular economy is seen as a solution to India's solid waste management issues, with the potential for significant economic value. This study examines current waste management practices and evaluates the feasibility of implementing circular economy as a solution. The importance of incorporating circular economy into India's waste management sector is emphasized.
WASTE MANAGEMENT & RESEARCH
(2023)
Article
Thermodynamics
Deval Singh, Mamta Tembhare, Nitesh Machhirake, Sunil Kumar
Summary: The demand for efficient and productive food supply chain is increasing rapidly due to the growth of the world population. Anaerobic digestion of discarded food waste residue along with buffer substrate could be a sustainable way to convert waste to energy. In this study, different substrate combinations were prepared and tested for methane production potential. The best prediction efficiency for methane yield was achieved using an artificial neural network.
Article
Environmental Sciences
Song-Jeng Huang, Kavya Arun Dwivedi, Sunil Kumar, Chin-Tsan Wang, Asheesh Kumar Yadav
Summary: The power performance of dual-chamber microbial fuel cells (MFCs) with two different types of base anodes (graphite felt and activated carbon cloth) coated with NiO/MnO2 for the removal of Norfloxacin (NFX) in wastewater was tested. The application of transition metal oxides in MFCs significantly improved the extracellular electron transfer, leading to reduced internal resistance and enhanced biocompatibility. The NiO/MnO2 coated graphite felt and activated carbon cloth exhibited 1.2-fold and 1.3-fold better performance, respectively.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Satarupa Dey, Uttpal Anand, Vineet Kumar, Sunil Kumar, Mimosa Ghorai, Arabinda Ghosh, Nishi Kant, S. Suresh, Sayan Bhattacharya, Elza Bontempi, Sartaj Ahmad Bhat, Abhijit Dey
Summary: The COVID-19 pandemic has caused a significant increase in plastic waste, such as disposable gloves, masks, tissues, and other PPE. Improper management of healthcare waste poses serious health hazards and challenges for solid waste management authorities. The incineration of COVID-19 medical waste generates microplastic particles, dioxins, furans, and toxic metals, which pose a threat to human and animal health. Degradation of microplastics by microorganisms can be a sustainable solution to mitigate the microplastic pollution caused by the pandemic.
ENVIRONMENTAL RESEARCH
(2023)
Article
Energy & Fuels
Rahul Tiwari, Rahul Mishra, Akansha Choubey, Sunil Kumar, A. E. Atabani, Irfan Anjum Badruddin, T. M. Yunus Khan
Summary: Given the rapid growth of the aviation sector, finding sustainable ways to meet the demand is crucial. Biojet fuels, considered more renewable and less polluting than traditional jet fuel, have the potential to be an effective substitute, but the high price of feedstock and limited supply are the main obstacles to widespread adoption.
Article
Microbiology
Pooja Sharma, Ashok Kumar Nadda, Sunil Kumar
Summary: This study aimed to improve the degradation of organic pollutants in municipal solid waste (MSW) through the bio-stimulation process. The results showed that the physico-chemical properties of MSW were improved and major organic pollutants were degraded after the biostimulation process. These findings provide valuable information for preventing soil pollution and protecting health.
MICROBIOLOGICAL RESEARCH
(2023)
Review
Environmental Sciences
Deblina Dutta, Rahul Rautela, Lohit Kumar Srinivas Gujjala, Debajyoti Kundu, Pooja Sharma, Mamta Tembhare, Sunil Kumar
Summary: E-waste management is a global concern due to the increase in end-of-life electrical and electronic equipment (EEEs). Improper disposal of EEE has negative impacts on the environment and human health. Various studies have been conducted on metal recovery processes from E-waste using pyrometallurgy, hydrometallurgy, and biometallurgy. This review provides a comprehensive summary of these processes, their advantages, and limitations. It also includes a bibliometric study and discusses the circular economic approach to sustainable E-waste management.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Rahul Mishra, Aman Kumar, Ekta Singh, Sunil Kumar
Summary: The disposal of plastic waste is a global issue that affects the environment and mankind. Thermochemical recycling techniques, particularly pyrolysis, have been extensively researched to convert waste plastics into value-added products. Catalytic pyrolysis is used to produce higher quantities of fuel, and various catalysts are employed for this purpose. This Perspective provides an overview of recent developments in catalytic pyrolysis, focusing on the impact on product yields and composition, as well as the potential applications. It also includes a thorough review of techno-economic assessment.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Editorial Material
Environmental Sciences
Vineet Kumar, Sunil Kumar, Juliana Heloisa Pine Americo-Pinheiro, Meththika Vinthange, Farooq Sher
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Vikas Menon, Swati Sharma, Shreya Gupta, Anujit Ghosal, Ashok Kumar Nadda, Rajan Jose, Pooja Sharma, Sunil Kumar, Pardeep Singh, Pankaj Raizada
Summary: Synthetic plastics were invented for human convenience due to their lightweight, durability, elasticity, moldability, affordability, and hydrophobicity. However, their non-biodegradability and accumulation pose significant threats to the environment and living beings. Microplastics of various types are entering water bodies and food chains, causing harm to organisms and inducing inflammation, metabolism disturbance, and necrosis in cells and tissues. This review discusses the generation routes, impacts, identification, and treatment of microplastics and highlights potential detection techniques for microplastics in water samples.
Review
Energy & Fuels
Sartaj Ahmad Bhat, Vineet Kumar, Sunil Kumar, A. E. Atabani, Irfan Anjum Badruddin, Kyu-Jung Chae
Summary: This article discusses the new developments in producing high-value activated porous carbon from various wastes for supercapacitor usage. The use of waste materials for activated carbon production has grown recently due to its affordability, economic feasibility, and as an effective solution to waste management. Different types of waste materials, including palm, plastic, E-waste, tea, agricultural, and animal wastes, have shown potential as starting material for activated carbon in supercapacitors. The advantages of using waste materials for energy storage are explored, along with the steps involved in preparing activated carbon. The economic aspect of supercapacitor production from waste materials is highlighted, along with the future potential for supercapacitor applications.
Review
Engineering, Environmental
Deval Singh, Anil Kumar Dikshit, Sunil Kumar
Summary: The rapid increase in municipal solid waste in developing countries is causing environmental problems such as contamination of air, water, and soil. The current management of waste faces challenges such as lack of technology, strategic management, social awareness, and public participation. Efforts have been made globally to develop systematic collection and transportation methods using advanced technology, but few studies have addressed this issue in low- and middle-income countries due to a lack of reliable resources and data. This paper discusses the challenges in collection and transportation methods and highlights the application of information communication technology in monitoring and managing waste.
WASTE MANAGEMENT & RESEARCH
(2023)
Review
Environmental Sciences
Akansha Gupta, Pooja Ghosh, Kalpana Arora, Satyawati Sharma, Sunil Kumar
Summary: Pines are important for global forest biodiversity and produce a large amount of forest litter. Dry pine needles can easily catch fire due to their low ignition temperature and friction with the ground. Forest fires in northern India have significant economic and environmental impacts, causing damage to biodiversity and livelihoods. Pine needles have potential applications in industries such as pulp-making, pharmaceuticals, and food due to the presence of useful compounds. Additionally, pine needles can be utilized for biofuel production, bio-pesticides, and other environmental protection purposes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Pratibha Gautam, Sunil Kumar
Summary: The study focuses on characterizing and treating hazardous waste landfill leachate through electrocoagulation for the reduction of COD. Significant reduction in pollutants and COD was achieved on a bench-scale reactor, demonstrating the potential of electrocoagulation for further research.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)
