Article
Environmental Sciences
Wael Alrashed, Rashmi Chandra, Timothy Abbott, Hyung-Sool Lee
Summary: This study assessed the effectiveness of methane-based membrane biofilm reactors (MBfRs) for nitrite removal in dilute wastewater. The results showed that high nitrite removals can be achieved at certain methane pressures and hydraulic retention times, with low dissolved methane concentrations in treated effluent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Jiaqi Wang, Mingyue He, Yufen Li, Fang Ma, Ping Zheng, Baolan Hu
Summary: This study successfully achieved rapid enrichment of denitrifying methanotrophs using a series hollow-fiber membrane biofilm reactor for 90 days. The results showed that the series reactor effectively counteracted the inhibitory effect of dissolved oxygen on denitrifying methanotrophic archaea, resulting in a high growth rate.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Ting Xie, Xinyu Liu, Yiming Xu, Samuel Bryson, Lu Zhao, Kai Huang, Shiqi Huang, Xiaoming Li, Qi Yang, Huiyu Dong, Mari-Karoliina H. Winkler
Summary: Simultaneous removal of ammonium and nitrate was achieved in a methane-fed moving bed biofilm reactor (MBBR) through the collaboration of methanotrophic microorganisms, denitrifiers, and anaerobic ammonium oxidizing bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Cheng Cheng, Jian Zhang, Qiang He, Haiming Wu, Yi Chen, Huijun Xie, Spyros G. Pavlostathis
Summary: This study found that under anoxic conditions, the consumption of N2O can drive the oxidation of CH4, mainly mediated by methanotrophs in the microbial community. The research reveals the potential mechanisms of N2O-driven CH4 oxidation and highlights the significant role of methanotrophs in carbon and nitrogen cycles.
Article
Engineering, Environmental
Erick Centeno Mora, Aline Gomes de Oliveira Paranhos, Sergio Francisco de Aquino, Carlos Augusto de Lemos Chernicharo
Summary: This study evaluated a novel configuration, using pressurised dynamic membrane modules (PDMMs), for treating anaerobic effluent from sewage. The results showed that the dense membrane had a more stable performance and could effectively remove pollutants such as methane and sulphide, while the microporous membrane suffered from wetting. Additionally, automated and chemical cleaning methods were effective in controlling fouling and maintaining membrane performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Review
Environmental Sciences
Duowei Lu, Hao Bai, Fangong Kong, Steven N. Liss, Baoqiang Liao
Summary: Membrane aerated biofilm bioreactor (MABR) technology has shown significant progress in wastewater treatment, with advantages of high oxygen transfer, COD/N removal, and energy efficiency. Future research directions include biofilm thickness control, new application potentials, and design of new membrane materials and modules.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yongsun Jang, Sang-Hoon Lee, Na-Kyung Kim, Chang Hoon Ahn, Bruce E. Rittmann, Hee-Deung Park
Summary: In a hydrogen-based membrane biofilm reactor (H-2-MBfR), the thickness of biofilm is crucial for denitrification. Thick biofilms have lower removal fluxes due to substrate transport resistance. This study operated the H-2-MBfR under different loading rates of oxyanions, and observed improved performance and stable denitrification under stressful conditions. Microbial community analysis showed dominant heterotrophs and the presence of functional genes related to organic carbon metabolism and homoacetogenesis.
Article
Environmental Sciences
Nguyen Anh-Vu, Lee Yun-Je, Kobayashi Masumi, Chettiyappan Visvanathan
Summary: This study investigates the effects of membrane shape on oxygen transfer and utilization rates, as well as pollutant removal performance, in a MABR. The results show that membranes with higher relaxation rates improve removal efficiencies. Additionally, the addition of PVA gel beads carrying denitrifying bacteria enhances the denitrification process.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Khin July Win Thant, Nguyen Anh-Vu, Kigo Yun-Je, Kobayashi Masumi, Chettiyappan Visvanathan
Summary: Membrane-aerated biofilm reactors (MABRs) have attracted attention for their wastewater treatment performance, but face challenges with reactor design and low total nitrogen (TN) removal efficiency. This study evaluated a hybrid system of MABR integrated with an anoxic nano-biotechnological reactor filled with Granulated Nanoscale Oxyhydroxides of Fe (GNOF) media to improve nitrogen removal. The hybrid MABR-GNOF system achieved higher removal efficiencies than the MABR-only system, with an 18% increase in nitrogen removal at 12 hours of hydraulic retention time (HRT).
Article
Chemistry, Multidisciplinary
Su Yeon Bak, Seung Gi Kang, Kyu Hwan Choi, Ye Rim Park, Eun Yeol Lee, Bum Jun Park
Summary: We describe a phase-transfer biocatalytic process for methane-to-methanol conversion using a spontaneous phase-separable membrane micro-CSTR. The developed system offers several critical advantages for operating the conversion reaction.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Biotechnology & Applied Microbiology
Thao P. Tran, Masashi Hatamoto, Masataka Aoki, Takahiro Watari, Kazuaki Syutsubo, Takashi Yamaguchi
Summary: This study aimed to evaluate the impact of enriched sludge and paddy soil as inocula on autotrophic nitrogen removal using hollow fiber membrane reactors. The results showed that UR1 performed better under specialized conditions, while UR2 had a higher adaptation under non-specialized conditions.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Environmental Sciences
Rui Huang, Tongyang Meng, Gaige Liu, Shanshan Gao, Jiayu Tian
Summary: A membrane bioreactor was constructed to simultaneously achieve nitrification and denitrification. The effect of dissolved oxygen on the process and nitrogen pathways was investigated. Higher dissolved oxygen concentrations resulted in higher total nitrogen removal efficiency, with nitrite mainly removed through denitrification. Nitrate reductase and nitrite oxidoreductase were the main enzymes involved in nitrogen conversion.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Review
Biotechnology & Applied Microbiology
Noemi Poma, Andrea Bonini, Federico Vivaldi, Denise Biagini, Mariagrazia Di Luca, Daria Bottai, Fabio Di Francesco, Arianna Tavanti
Summary: Climate change due to increased greenhouse gas emissions has had a significant impact on the sustainability of life on Earth. Methane, a greenhouse gas, is increasing in concentration and its measurement is important for the environment and safety. The use of methane-oxidizing bacteria in biosensing systems shows promise for methane quantification and monitoring.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2023)
Review
Engineering, Environmental
Jia Li, Zhiwei Wang, Yayi Wang
Summary: Membrane aerated biofilm reactors (MABRs) are an energy-efficient technology for biological nitrogen removal (BNR), which can bring wastewater treatment plants (WWTPs) closer to carbon neutrality. MABRs use gas-permeable hydrophobic membranes to supply oxygen and serve as carriers for biofilm attachment. This review summarizes the characteristics and advantages of MABRs, as well as their application in coupling with novel BNR processes. It also discusses the potential of MABRs in upgrading existing WWTPs and the integration of PN/A process into MABRs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Yingrui Liu, Tingting Zhu, Shuqi Ren, Tianhang Zhao, Hongxiang Chai, Yifeng Xu, Lai Peng, Yiwen Liu
Summary: This study investigated N2O turnover pathways and affecting parameters in MABR systems using a mathematical model. It found that operational conditions such as oxygen surface loading, hydraulic retention time, and influent COD concentration significantly influence N2O production. Thicker biofilms in the range of 160-280 micrometers were identified as optimal for reducing N2O emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Ziyi Xiong, Abid Hussain, Jangho Lee, Hyung-Sool Lee
BIORESOURCE TECHNOLOGY
(2019)
Article
Agricultural Engineering
Min-Hua Cui, Lei Gao, Hyung-Sool Lee, Ai-Jie Wang
BIORESOURCE TECHNOLOGY
(2020)
Article
Engineering, Chemical
Xiaotong Cao, Hyung-Sool Lee, Xianshe Feng
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
Microbiology
Keunje Yoo, Hyunji Yoo, Jangho Lee, Eun Joo Choi, Joonhong Park
JOURNAL OF MICROBIOLOGY
(2020)
Article
Energy & Fuels
Dandan Liang, Lijuan Zhang, Weihua He, Chao Li, Junfeng Liu, Shaoqin Liu, Hyung-Sool Lee, Yujie Feng
Article
Agricultural Engineering
Jiannan Li, Yanling Yu, Dahong Chen, Guohong Liu, Dongyi Li, Hyung-Sool Lee, Yujie Feng
BIORESOURCE TECHNOLOGY
(2020)
Article
Environmental Sciences
Swakshar Saha, Hyung-Sool Lee
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Environmental Sciences
Il Han, Keunje Yoo
Article
Infectious Diseases
Keunje Yoo, Gihan Lee
Summary: Metagenomic analysis revealed different abundances and dissemination patterns of ARGs between large-scale and small-scale WWTPs, with Proteobacteria and Actinobacteria being the dominant bacterial phyla across both scales, which aids in the development of next-generation engineered wastewater treatment systems.
Article
Microbiology
Aalfin Emmanuel Santhanarajan, Woo-Jun Sul, Keun-Je Yoo, Hoon-Je Seong, Hong-Gi Kim, Sung-Cheol Koh
Summary: The bioaugmentation of CES-1 showed improvements in water quality, sludge reduction, and degradation of azo dye compounds in a full scale textile dye wastewater treatment process. Additionally, an increase in microbial diversity and the selection of specific microbial communities were observed post-augmentation, potentially contributing to the overall success of the treatment process. Metagenomic analysis was a valuable tool in providing insights and biomarkers for complex environmental conditions like those encountered in the dye wastewater treatment system undergoing bioaugmentation.
Article
Public, Environmental & Occupational Health
Hye-Ran Kim, Choong-Won Seo, Keunje Yoo, Sang Jun Han, Jongwan Kim
Summary: The study found that YAP1 expression varies between different cancers and non-tumor tissues. High YAP1 expression is associated with poor prognosis in adrenocortical carcinoma, bladder urothelial carcinoma, and pancreatic adenocarcinoma. Additionally, YAP1 expression is correlated with telomerase reverse transcriptase and telomerase RNA component in various cancer types.
OSONG PUBLIC HEALTH AND RESEARCH PERSPECTIVES
(2021)
Article
Microbiology
Aalfin-Emmanuel Santhanarajan, Chaeyoung Rhee, Woo Jun Sul, Keunje Yoo, Hoon Je Seong, Hong-Gi Kim, Sung-Cheol Koh
Summary: This study investigated the biodegradation of the azo dye AB113 and identified the key pathways and enzymes involved in its degradation. The results showed that the benzoate and naphthalene degradation pathways played a crucial role in AB113 degradation, and enzymes such as NADH quinone oxidoreductase, N-acetyltransferase, aromatic ring-hydroxylating dioxygenase, and CYP450 were found to be important for AB113 degradation.
Article
Environmental Sciences
Jeongwon Kim, Sang Jun Han, Keunje Yoo
Summary: This study investigated the bacterial and fungal communities in six indoor facilities in South Korea. The results showed that the bacterial diversity was higher than the fungal diversity in indoor multiple-use facilities, while no significant difference was observed in public transportation facilities. The abundances of certain microbial taxa varied, suggesting that the microbial community structure was determined by the source environment. These findings provide insights into indoor microbial communities in multi-use and transportation facilities.
Article
Environmental Sciences
Jeongwon Kim, Suyeon Bae, Sena Park, Sudheer Kumar Shukla, Keunje Yoo
Summary: This study explores surface bacterial communities in subway facilities by sequencing swabs collected from four global subway stations using 16S rRNA gene amplicon sequencing. The results show that there are significant differences in alpha-diversity between Moscow and other samples. The dominant phyla in all samples are Actinobacteria, Proteobacteria, and Firmicutes, with no significant differences. The study suggests that human activity and geographical environment may affect the establishment of bacterial communities.
Article
Water Resources
Sudheer Kumar Shukla, Noof Rashid Said Al Mushaiqri, Hajar Mohammed Al Subhi, Keunje Yoo, Hafez Al Sadeq
APPLIED WATER SCIENCE
(2020)
Article
Environmental Sciences
Toshimi Nakajima, Mao Kuragano, Makoto Yamada, Ryo Sugimoto
Summary: This study compared the contribution of submarine groundwater discharge (SGD) to river nutrient budgets at nearshore and embayment scales, and found that SGD-derived nutrients become more important at larger spatial scales.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Fan Liu, Lei Zhang, Chongyang Zhang, Ziguang Chen, Jingguang Li
Summary: NO2 emissions from wall-mounted gas stoves used for household heating have become a significant source of indoor pollution in Chinese urban areas. The high indoor concentration of NO2 poses potential health risks to residents. It is urgently necessary to establish relevant regulations and implement emission reduction technologies to reduce NO2 emissions from wall-mounted gas stoves.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Letter
Environmental Sciences
Hans Peter H. Arp, Raoul Wolf, Sarah E. Hale, Sivani Baskaran, Juliane Gluege, Martin Scheringer, Xenia Trier, Ian T. Cousins, Harrie Timmer, Roberta Hofman-Caris, Anna Lennquist, Andre D. Bannink, Gerard J. Stroomberg, Rosa M. A. Sjerps, Rosa Montes, Rosario Rodil, Jose Benito Quintana, Daniel Zahn, Herve Gallard, Tobias Mohr, Ivo Schliebner, Michael Neumann
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Philomina Onyedikachi Peter, Binessi Edouard Ifon, Francois Nkinahamira, Kayode Hassan Lasisi, Jiangwei Li, Anyi Hu, Chang-Ping Yu
Summary: This study investigates the relationship between dissolved organic matter (DOM) and Rare Earth Elements (REEs) in sediments from Yundang Lagoon, China. The results show four distinct fluorescent components, with protein-like substances being the most prevalent. Additionally, the total fluorescence intensity and LREE concentrations exhibit a synchronized increase from Outer to Inner to Songbai Lake core sediments. The findings demonstrate a strong correlation between DOM content and pollution levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Surya Gupta, Pasquale Borrelli, Panos Panagos, Christine Alewell
Summary: The objective of this study is to incorporate soil hydraulic properties into the erodibility factor (K) of USLE-type models. By modifying and improving the existing equations for soil texture and permeability, the study successfully included information on saturated hydraulic conductivity (Ksat) into the calculation of K factor. Using the Random Forest machine learning algorithm, two independent K factor maps with different spatial resolutions were generated. The results show that the decrease in K factor values has a positive impact on the modeling of soil erosion rates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jesmin Akter, Wendy J. M. Smith, Yawen Liu, Ilho Kim, Stuart L. Simpson, Phong Thai, Asja Korajkic, Warish Ahmed
Summary: The choice of workflow in wastewater surveillance has a significant impact on SARS-CoV-2 concentrations, while having minimal effects on HF183 and no effect on HAdV 40/41 concentrations. Certain components in the workflow can be interchangeable, but factors such as buffer type, chloroform, and homogenization speed can affect the recovery of viruses and bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yu Luo, Xueting Yang, Diwei Wang, Hongmei Xu, Hongai Zhang, Shasha Huang, Qiyuan Wang, Ningning Zhang, Junji Cao, Zhenxing Shen
Summary: Atmospheric PM2.5, which can generate reactive oxygen species (ROS), is associated with cardiorespiratory morbidity and mortality. The study found that both the mass concentration of PM2.5 and the DTT activity were higher during the heating season than during the nonheating season. Combustion sources were the primary contributors to DTT activity during the heating season, while secondary formation dominated during the nonheating season. The study also revealed that biomass burning had the highest inherent oxidation potential among all sources investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Erin L. Murphy, Leah R. Gerber, Chelsea M. Rochman, Beth Polidoro
Summary: Plastic pollution has devastating consequences for marine organisms. This study uses a trait-based framework to develop a vulnerability index for marine mammals, seabirds, and sea turtles in Hawai'i. The index ranks 63 study species based on their vulnerability to macroplastic pollution, providing valuable information for species monitoring and management priorities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Kenji Maurice, Amelia Bourceret, Sami Youssef, Stephane Boivin, Liam Laurent-Webb, Coraline Damasio, Hassan Boukcim, Marc-Andre Selosse, Marc Ducousso
Summary: Growing pressure from climate change and agricultural land use is destabilizing soil microbial community interactions. Little is known about microbial community resistance and adaptation to disturbances, hindering our understanding of recovery latency and implications for ecosystem functioning. This study found that anthropic disturbance and natural disturbance have different effects on the topology and stability of soil microbial networks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yunhao Li, Yali Feng, Haoran Li, Yisong Yao, Chenglong Xu, Jinrong Ju, Ruiyu Ma, Haoyu Wang, Shiwei Jiang
Summary: Deep-sea mining poses a serious threat to marine ecosystems and human health by disturbing sediment and transmitting metal ions through the food chain. This study developed a new regenerative adsorption material, OMN@SA, which effectively removes metal ions. The adsorption mechanism and performance of the material for metal ion fixation were investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Antonio Medici, Margherita Lavorgna, Marina Isidori, Chiara Russo, Elena Orlo, Giovanni Luongo, Giovanni Di Fabio, Armando Zarrelli
Summary: Valsartan, a widely used antihypertensive drug, has been detected in high concentrations in surface waters due to its unchanged excretion and incomplete degradation in wastewater treatment plants. This study investigated the degradation of valsartan and identified 14 degradation byproducts. The acute and chronic toxicity of these byproducts were evaluated in key organisms in the freshwater trophic chain.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jiang Lin, Lianbao Chi, Qing Yuan, Busu Li, Mingbao Feng
Summary: This study investigated the photodegradation behavior and product formation of two representative pharmaceuticals in simulated estuary water. The study found that the formed transformation products of these pharmaceuticals have potential toxicity on marine organisms, including oxidative stress and damage to cellular components.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Hua Fang, Dongdong Jiang, Ye He, Siyi Wu, Yuehong Li, Ziqi Zhang, Haoting Chen, Zixin Zheng, Yan Sun, Wenxiang Wang
Summary: This study revealed that exposure to lower levels of air pollutants led to decreased pregnancy rates, with PM10, NO2, SO2, and CO emerging as the four most prominent pollutants. Individuals aged 35 and above exhibited heightened susceptibility to pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Ali Shaan Manzoor Ghumman, Rashid Shamsuddin, Amin Abbasi, Mohaira Ahmad, Yoshiaki Yoshida, Abdul Sami, Hamad Almohamadi
Summary: In this study, inverse vulcanized polysulfides (IVP) were synthesized by reacting molten sulfur with 4-vinyl benzyl chloride, and then functionalized using N-methyl D-glucamine (NMDG). The functionalized IVP showed a high mercury adsorption capacity and a machine learning model was developed to predict the amount of mercury removed. Furthermore, the functionalized IVP can be regenerated and reused, providing a sustainable and cost-effective adsorbent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Rita Bonfiglio, Renata Sisto, Stefano Casciardi, Valeria Palumbo, Maria Paola Scioli, Erica Giacobbi, Francesca Servadei, Gerry Melino, Alessandro Mauriello, Manuel Scimeca
Summary: This study investigated the presence of aluminum in human colon cancer samples and its potential association with biological processes involved in cancer progression. Aluminum was found in tumor areas of 24% of patients and was associated with epithelial to mesenchymal transition (EMT) and cell death. Additional analyses revealed higher tumor mutational burden and mutations in genes related to EMT and apoptosis in aluminum-positive colon cancers. Understanding the molecular mechanisms of aluminum toxicity may improve strategies for the management of colon cancer patients.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)