Article
Environmental Sciences
Aysenur Turan, Mehmet Kobya, Cisel Iskurt, Erhan Gengec, Alireza Khataee
Summary: Landfill leachate treatment in Turkey commonly utilizes a combination of membrane bioreactor (MBR) and membrane treatment using nanofiltration (NF) and/or reverse osmosis (RO). This process yields landfill leachate membrane concentrates (LLMCs) that have high concentrations of contaminants. In this study, two different nanofiltration concentrates of leachate were subjected to coagulation. The most effective pH values for the coagulants were found to be 5.0 for Al3+ and 4.0 for Fe3+, which are lower than the typically recommended pH values due to the presence of humic substances in the wastewater. Among the coagulants analyzed, Fe2(SO4)3.xH2O had the lowest cost.
Article
Environmental Sciences
Hasan Pasalari, Mohsen Ghasemian, Ali Esrafili, Mitra Gholami, Mahdi Farzadkia
Summary: The study investigated a combined pretreatment oxidation process (O-3/H2O2) to enhance the biodegradability of raw landfill leachate (RLL) and biomethane potential (BMP) in anaerobic reactors. The optimized O-3/H2O2 process significantly increased the biodegradability index of RLL and improved BMP by almost three times in a shorter lag-phase period.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Engineering, Environmental
Weiming Chen, Zhepei Gu, Chen He, Qibin Li
Summary: This study identified the transformation mechanism of refractory organic matter in membrane bioreactor effluent using electrospray ionization coupled with Fourier transform ion cyclotron resonance mass spectrometry. The results showed that the flocculation-ultraviolet (UV)/peroxymonosulfate (PMS) system was effective in removing dissolved organic matter (DOM) and regulating its oxidation and saturation.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Siying Sun, Jiabao Ren, Jiale Liu, Liang Rong, Hangli Wang, Yeyuan Xiao, Faqian Sun, Rongwei Mei, Chongjun Chen, Xiaomei Su
Summary: The study found that pyrite-activated persulfate oxidation efficiently removed organic matter from the effluent of a biological landfill leachate treatment system, and subsequent denitrification was also successful. With the optimal parameters, a COD removal efficiency of about 45% and a nitrate removal rate of around 108 mg L-1 d(-1) were achieved.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Weibo Hao, Tong Gao, Wansheng Shi, Mingxing Zhao, Zhenxing Huang, Hongyan Ren, Wenquan Ruan
Summary: This study explores the application of a new coagulant ZrCl4 for the treatment of biologically treated landfill leachate nanofiltration concentrate (LLNC). The results show that ZrCl4 is more effective than traditional coagulants in removing residual dissolved organic matter (DOM), with better neutralization capacity and larger floc size. Furthermore, the recycled ZrCl4 coagulant shows no significant difference in DOM removal, suggesting that the disposal problem of coagulation sludge can be resolved.
Article
Environmental Sciences
Yuansi Hu, Zhepei Gu, Junjie He, Qibin Li
Summary: Flocculation is an effective pretreatment technology for landfill leachate, but the effectiveness of the process is influenced by the operation sequence and the presence of colloidal instability. This study found that by separating the leachate and sludge first, and then adjusting the pH value to 9, the removal efficiency of organic matter from leachate can be significantly increased. This control strategy can provide theoretical and engineering references for the flocculation pretreatment of landfill leachate.
Article
Green & Sustainable Science & Technology
Radhakrishnan Naresh Kumar, Somya Sadaf, Mohini Verma, Shubhrasekhar Chakraborty, Shweta Kumari, Veerababu Polisetti, Parashuram Kallem, Jawed Iqbal, Fawzi Banat
Summary: The use of novel flocculants in combination with a sequencing batch reactor (SBR) has proven effective in reducing polluted effluents from landfill leachate and municipal wastewater. Co-treatment of landfill leachate with municipal wastewater in SBR, followed by coagulation-flocculation, achieved significant removal of COD, ammonia, nitrate, phosphate, turbidity, and TSS. The combined treatment with the new flocculants successfully met international standards for discharges to inland surface water.
Article
Engineering, Environmental
M. Laura Pinedo, Brayan D. Riascos, Xavier E. Quintero, Carlos Costa
Summary: This article proposes a new method of pH sensitive flocculation for COD and color reduction in landfill leachate based on the chemical properties of humic acids (HAs). The pH sensitive flocculation technique efficiently reduces COD value by 86.1% and color by 84.7% in landfill leachate with a high content of HAs. The mechanism of pH sensitive flocculation involves protonation of phenolic and carboxylic acid groups in HAs molecules, resulting in a reduction of Zeta potential value.
Article
Engineering, Environmental
Raquel Greice de Souza Marotta Alfaia, Ronei de Almeida, Kleby Soares do Nascimento, Juacyara Carbonelli Campos
Summary: This study investigates the effects of landfill leachate pretreatment on the performance of NF and RO membranes. The results show that C/F pretreatment can significantly improve the permeate flux and reduce fouling resistance of certain membranes. It is recommended to pretreat the landfill leachate to mitigate membrane fouling.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Huan He, Chen Zhang, Xiaoxia Yang, Bin Huang, Jiangyun Zhe, Chaochao Lai, Zhicheng Liao, Xuejun Pan
Summary: In this study, a combined device of tower bipolar electrode flocculation-oxidation reactor and electrochemical biofilm reactor was constructed to treat mature landfill leachate effectively. The BEF-O system showed excellent treatment efficiency, removing most pollutants and increasing the bioavailability of the effluent for subsequent EBR treatment. The combined device could reduce COD and NH4+-N concentrations, with low energy consumption.
Article
Engineering, Environmental
Siti Nor Farhana Zakaria, Hamidi Abdul Aziz, Maheera Mohamad
Summary: This research study investigates the effectiveness of zirconium tetrachloride (ZrCl4) and tin tetrachloride (SnCl4) as a coagulant in landfill leachate treatment. The combination treatment of SnCl4 as a coagulant with ozone (O-3) showed the highest removal of color and COD, as well as an improvement in the biodegradability ratio. Integrated treatment is found to be more effective than the coagulation-flocculation process alone in treating stabilized landfill leachate.
WATER ENVIRONMENT RESEARCH
(2022)
Article
Environmental Sciences
Ibrar Ibrar, Sudesh Yadav, Namuun Ganbat, Akshaya K. Samal, Ali Altaee, John L. Zhou, Tien Vinh Nguyen
Summary: This study investigates the impact of chemical cleaning with hydrogen peroxide on forward osmosis membrane, revealing that the polysulfone support layer is more sensitive to damage. Results show that in the AL-FS mode, chemical cleaning with H2O2 can recover 92% of the flux.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Jiaqi Wang, Zhengguang He, Yuzhong Wang, Manjing Lu
Summary: The study demonstrates the successful embedding of manganese ferrite nanoparticles on the nitrogen-doped reduced graphene oxide matrix using a simple one-pot method. The electrochemical/peroxymonosulfate/NrGO-MnFe2O4 system shows synergistic effects in treating landfill leachate nanofiltration concentration, achieving a high COD removal rate under optimal conditions. The system also simplifies the structure of refractory organic compounds and directly mineralizes small molecular organic compounds, showing significant potential for treating refractory wastewater.
Article
Biotechnology & Applied Microbiology
Yong Cheng, Longjun Xu, Chenglun Liu
Summary: In this study, red mud was used as a raw material to extract aluminum and iron, and a highly efficient polyaluminium ferric chloride (PAFC) flocculant was prepared. The flocculation performance of the PAFC under different synthesis and flocculation conditions was investigated. The results showed that the PAFC prepared at specific conditions had the optimum effect and could be used for the treatment of aged landfill leachate.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Engineering, Environmental
Jing Yang, Xiaoqin Zhang, Jia Tang, Jinlan Li, Aiping Zhang
Summary: In this study, the addition of MoS2 enhanced the Fe-0/H2O2 Fenton-like system, resulting in efficient removal of refractory organic matter from landfill leachate. The MoS2/Fe-0/H2O2 system exhibited a strong synergistic effect and could remove a wide range of aromatic organics.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Shun-Shun Chen, Xu-Xiu Chen, Tian-Yu Yang, Li Chen, Zheng Guo, Xing-Jiu Huang
Summary: A temperature-modulated sensing strategy was proposed to identify and determine BTEX compounds. Highly effective identification of BTEX was achieved using linear discrimination and convolutional neural network analyses. Additionally, quantitative analysis of concentration was accomplished by establishing the relationship between concentration and response.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Myungkyung Noh, Jeong Yeon Sim, Jisung Kim, Jee Hwan Ahn, Hye-Young Min, Jong-Uk Lee, Jong-Sook Park, Ji Yun Jeong, Jae Young Lee, Shin Yup Lee, Hyo-Jong Lee, Choon-Sik Park, Ho-Young Lee
Summary: This study reveals that chronic exposure to PM induces chronic inflammation and development of COPD by dysregulating NAD+ metabolism and subsequent SIRT1 deficiency in pulmonary macrophages. Activation of SIRT1 by resveratrol effectively mitigates PM-induced inflammation and COPD development. Targeting metabolic and epigenetic reprogramming in macrophages induced by PM is a promising strategy for COPD treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yu Liu, Linlin Qin, Yiming Qin, Tong Yang, Haoran Lu, Yulong Liu, Qiqi Zhang, Wenyan Liang
Summary: Co/NC/PAC electrode was prepared by compounding ZIF-67 with powder-activated carbon for the electrocatalytic treatment of nitrogen-containing heterocyclic compounds. The degradation efficiency of the four compounds reached 90.2-93.7% under optimal conditions, and the degradation order was pyridazine < pyrimidine < pyrazine < pyridine.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Julien Couturier, Pierre Tamba Oulare, Blanche Collin, Claire Lallemand, Isabelle Kieffer, Julien Longerey, Perrine Chaurand, Jerome Rose, Daniel Borschneck, Bernard Angeletti, Steven Criquet, Renaud Podor, Hamed Pourkhorsandi, Guilhem Arrachart, Clement Levard
Summary: This study analyzes the properties of bauxite residue samples and explores the influence of bauxite ore origin, storage conditions, and storage time. The results show that the speciation of yttrium is related to the origin of bauxite ore, while no significant variation was observed with storage conditions or aging of the residues.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Sakthinarenderan Saikumar, Ravi Mani, Mirunalini Ganesan, Inbakandan Dhinakarasamy, Thavamani Palanisami, Dharani Gopal
Summary: Microplastic contamination in marine ecosystems poses a growing concern due to its trophic transfer and negative effects on marine organisms. This study investigates the transfer and impacts of polystyrene microplastics in an estuarine food chain. The results show that microplastics can be transferred through the food chain, although the transfer rates are low. The exposed organisms exhibit stress responses, suggesting the potential risk of microplastics reaching humans through the food chain.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Review
Engineering, Environmental
Yan-Jiao Li, Ying Yuan, Wen-Bing Tan, Bei-Dou Xi, Hui Wang, Kun-Long Hui, Jia-Bao Chen, Yi-Fan Zhang, Lian-Feng Wang, Ren-Fei Li
Summary: This review investigated and analyzed the distribution, composition, and abundance of heavy metals and antibiotic resistance genes (ARGs) in landfill. The results showed that heavy metals have lasting effects on ARGs, and complexes of heavy metals and organic matter are common in landfill. This study provides a new basis to better understand the horizontal gene transfer (HGT) of ARGs in landfill.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Jessy Joseph, Ari Vaisanen, Ajay B. Patil, Manu Lahtinen
Summary: Efficient and environmentally friendly porous hybrid adsorbent beads have been developed for the removal of arsenic from drinking water. The structural tuning of the adsorbents has been shown to have a significant impact on their adsorption performance, with high crystallinity leading to increased adsorption capacity and selectivity towards As5+.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yangyang Liu, Minhua Xiao, Kaiqin Huang, Juntao Cui, Hongli Liu, Yingxin Yu, Shengtao Ma, Xihong Liu, Meiqing Lin
Summary: This study measured the levels of phthalate metabolites in breast milk collected from mothers in southern China. The results showed that phthalates are still prevalent in the region, and breastfeeding contributes to phthalate intake in infants. However, the levels detected do not pose significant health risks to infants based on dietary exposure. The increasing exposure to certain phthalates calls for further research into their sources and potential risks.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhiqiang Wu, Jianxing Sun, Liting Xu, Hongbo Zhou, Haina Cheng, Zhu Chen, Yuguang Wang, Jichao Yang
Summary: Ocean depth affects microbial diversity, composition, and co-occurrence patterns of microplastic microbial communities. Deterministic processes dominate the assembly of mesopelagic plastisphere microbial communities, while stochastic processes shape the assembly of bathypelagic microbial communities. The relationships between microorganisms in the mesopelagic layer are more complex and stable, with Proteobacteria and Actinobacteriota playing important roles.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Tingting Xiao, Renjie Chen, Chen Cai, Shijie Yuan, Xiaohu Dai, Bin Dong, Zuxin Xu
Summary: Based on the efficiency of catalytic ozonation techniques in enhancing sludge dewaterability, this study investigated its effectiveness in simultaneous reduction of antibiotics and antibiotic resistance genes. The results showed that catalytic ozonation conditioning changed the distribution of antibiotics and achieved high degradation rates. It also significantly reduced the abundance of ARGs, inhibited horizontal gene transfer, and decreased the signal transduction of typical ARGs host bacteria.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yang Deng, Xiaohong Guan
Summary: This article discusses two different development approaches for ferrate(VI) technology in water treatment, arguing that process integration is a promising method that can drive technological innovation and revolution in water treatment, achieving higher treatment efficiency, reduced costs and energy consumption, and a smaller physical footprint.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhe Zhang, Lu Zhang, Zhihao Huang, Yuxin Xu, Qingqing Zhao, Hongju Wang, Meiqing Shi, Xiangnan Li, Kai Jiang, Dapeng Wu
Summary: In this study, a floating catalytic foam was designed and prepared to enhance the mass transfer in immobilized photocatalysts for wastewater treatment. The floating catalytic foam could float on the water surface and establish a temperature gradient, effectively promoting the diffusion and adsorption of target molecules during the photocatalytic process.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Muhammad Nafees, Adiba Khan Sehrish, Sarah Owdah Alomrani, Linlin Qiu, Aasim Saeed, Shoaib Ahmad, Shafaqat Ali, Hongyan Guo
Summary: The accumulation of cadmium and antibiotics in edible plants and fertile soil is a worldwide problem. This study investigated the potential of zinc oxide nanoparticles to alleviate the toxicity of both cadmium and antibiotics and promote spinach growth.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Lurui Wan, Kai Wang, Yuan Chen, Zhiyong Xu, Wenbo Zhao
Summary: In this study, a low viscosity and high thermal stability SO2 absorbent with dual interacting sites was successfully synthesized. The absorbent showed the highest absorption enthalpy change and entropy change values among reported SO2 absorbents, and exhibited lower viscosity and comparable thermal stability to ILs.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhengwei Zhou, Guojie Ye, Yang Zong, Zhenyu Zhao, Deli Wu
Summary: This study utilized Mo powder and STPP to enhance the performance of the sodium percarbonate system in pollutant degradation. The presence of Mo and STPP resulted in a higher degradation rate of the model pollutant SMX, with low oxidant consumption. The system generated multiple active species through a series of chain reactions at different pH values, exhibiting excellent performance towards electron-rich pollutants. Furthermore, Mo demonstrated excellent stability and reusability.
JOURNAL OF HAZARDOUS MATERIALS
(2024)