Article
Engineering, Environmental
Qi Chen, Guiwei Li, Zhili Lu, Yuliang Su, Bin Wu, Baoyou Shi
Summary: This study investigated the removal of manganese(II) by granular activated carbon (GAC) filtration. The results showed that biological GAC filter columns were effective in reducing Mn(II) levels, while sand filter columns did not show significant Mn(II) removal capability. Water quality changes, pretreatment with NaClO, and MnOx coating on GAC media surface did not affect the Mn(II) removal capacity of GAC filters.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Marina Gutierrez, Vittoria Grillini, Dragana Mutavdzic Pavlovic, Paola Verlicchi
Summary: This study reviews the removal efficiencies of micropollutants in biological treatment coupled with activated carbon, finding that activated carbon can enhance the removal of micropollutants and improve degradation processes for organic matter. Additionally, it was observed that activated carbon can positively impact sludge properties.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Masaki Takaoka, Yingchao Cheng, Kazuyuki Oshita, Tomoaki Watanabe, Shoji Eguchi
Summary: Installing a fabric filter (FF) and selective catalytic reactor (SCR) at crematoria can effectively remove mercury, with removal efficiency ranging from 87.5-99.9%. Pre-treating with a mixture of lime and activated carbon effectively suppresses peak mercury concentrations at the outlet of the SCR.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Review
Environmental Sciences
Sidra Shaoor Kiani, Amjad Farooq, Masroor Ahmad, Naseem Irfan, Mohsan Nawaz, Muhammad Asim Irshad
Summary: Gas masks and purification filters are crucial in NBC warfare, using activated carbon to remove toxic chemicals and ensuring clean air for breathing to prevent harm. The review examines prevention measures, chemical adsorption, and destruction of toxic substances through reactive carbon.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Construction & Building Technology
Zhixiang Cao, Chen Zhang, Chao Zhai, Yi Wang, Meng Wang, Tongtong Zhao, Wenchao Lv, Yanqiu Huang
Summary: A novel curved vortex exhaust system (CVES) is proposed as an alternative for capturing pollutants when a canopy hood cannot be used, utilizing the principle of a column air vortex. Experimental and numerical methods are used to investigate the curved vortex formation process and influencing factors, revealing that the formation of the curved vortex in the CVES is a top-to-bottom process. Analysis of geometric parameters and supply/exhaust flow ratios show that increased exhaust outlet flowrate can decrease the optimal supply/exhaust flow ratio and benefit the size of the effective pollution source area.
BUILDING AND ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Jae-Hyung Wee, Younghwan Bae, Hyunchul Ahn, Yeong Og Choi, Euigyung Jeong, Sang Young Yeo
Summary: In this study, a high-performance combined cabin air filter (CCAF) with excellent dust and chemical filtration performance and low differential pressure was prepared using a mixed medium of granular activated carbon (GAC) and activated carbon fiber (ACF). The GAC/ACF mixed medium had higher air permeability and exhibited similar dust filtration performance to ACF without increasing the differential pressure. In addition, the GAC/ACF mixed medium showed excellent gas removal performance without increasing the differential pressure, combining the VOC removal characteristics of the GAC and ACF filter media. The improved VOC removal performance was attributed to the hybrid effect of the hierarchical pore structures of GAC and the nearly uniform pore structures of ACF.
Article
Engineering, Environmental
Parisa Mohammad-Gholikhan-Khalaj, Mahdi Hasanzadeh, Davoud Panahi, Zahra Yazdankhah, Somayeh Farhang Dehghan
Summary: In this study, a porous composite material (activated carbon@zeolitic imidazolate framework-8) was synthesized for the removal of toluene from the gas phase. The composite material showed high adsorption capacity, long breakthrough time, and excellent reuse performance.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Critical Care Medicine
Alain Combes, Daniel Brodie, Nadia Aissaoui, Thomas Bein, Gilles Capellier, Heidi J. Dalton, Jean-Luc Diehl, Stefan Kluge, Daniel F. McAuley, Matthieu Schmidt, Arthur S. Slutsky, Samir Jaber
Summary: Extracorporeal carbon dioxide removal (ECCO2R) is a form of extracorporeal life support used to remove carbon dioxide in patients with acute respiratory failure. Despite the lack of high-quality evidence, ECCO2R is increasingly being used, although complications associated with the technique remain a concern. This review emphasizes the need for structured registries and large randomized trials to evaluate the indications and risk-to-benefit ratio of ECCO2R.
INTENSIVE CARE MEDICINE
(2022)
Article
Environmental Sciences
Monzur Alam Imteaz, Maryam Bayatvarkeshi, Parminder Kaur
Summary: The study presents a mathematical model for predicting the removal efficiency of methylene blue on activated carbon derived from Parthenium hysterophorus. By considering four independent variables and fine-tuning the model with adjustment factors based on experimental results, the accuracy of predictions was significantly improved. Standard errors of the original model were reduced by 60%, 57% and 83% after adjustments, showing the effectiveness of the developed modelling approach.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Environmental Sciences
Junrui Cheng, Junpeng Bi, Yuemin Gong, Xin Cheng, Jie Yu, Huihui Gan, Rong Wang, Kan Wang
Summary: This study used a mixture of cultivated soil and river sand as a modified bioretention filter to remove nitrogen pollutants from simulated rainwater runoff. By adding activated carbon and ceramsite, the permeability and nitrogen removal efficiency of the filter were improved. The results showed that the addition of activated carbon significantly improved nitrogen removal, while ceramsite at a 20% ratio achieved optimal percolate rate and nitrogen removal efficiencies. The modified bioretention filter demonstrated long-term stability and ammonium nitrogen was less likely to accumulate compared to nitrate-nitrogen and total nitrogen.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Ewa Okoniewska
Summary: Dyes are widely used in various industries, but the wastewater they produce poses a threat to the environment due to its toxic effects. Common methods for removing dyes from wastewater, such as flotation and filtration, often result in the production of large amounts of sludge. Activated carbon adsorption is an effective method that can remove dyes without generating significant waste.
Article
Environmental Sciences
Zhijun Ren, Xiaolin Fu, Guangming Zhang, Yuyou Li, Yu Qin, Pengfei Wang, Xiaoyang Liu, Longyi Lv
Summary: This study demonstrated that iron-loaded biological activated carbon filter can effectively enhance the removal efficiency of low-concentration ammonia nitrogen wastewater at low temperature through improving surface properties to increase microbial quantity and metabolic activity, thus improving ammonia nitrogen removal rate. The presence of iron optimized the bacterial community structure and increased the abundances of psychrophilic bacteria and ammonia nitrogen removal bacteria on the surface of Fe-BAC, contributing to the enhanced biological nitrogen removal ability.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Applied
Jeniffer Blair-Gonzalez, Elsa Contreras-Villacura, Andrea Carvajal Guevara, Carolyn Palma Toloza
Summary: This study developed a sustainable catalyst using functionalized mesoporous activated carbon and enzymes for efficient removal of oxytetracycline. Different immobilization strategies and carriers were evaluated, with carriers treated with hydrochloric acid and glutaraldehyde showing the best performance in terms of protein-specific load capacity and specific activity. The catalyst demonstrated superior antibiotic removal efficiency through adsorption mechanism, attributed to the high affinity of the hydrochloric acid-treated carrier for the pollutant.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Environmental
J. Qian, P. Riede, G. Abbt-Braun, J. Parniske, S. Metzger, T. Morck
Summary: In this study, the efficacy of Powdered Activated Carbon (PAC)-Activated Sludge (AS) treatment in removing organic micropollutants (OMPs) was investigated through batch and pilot plant experiments. The results showed that the treatment was capable of achieving a high removal efficiency for nine OMPs. Additionally, intermittent dosage of PAC was found to stably remove OMPs, suggesting potential cost savings in terms of investment and maintenance.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Matteo Di Nardo, Filippo Annoni, Fuhong Su, Mirko Belliato, Roberto Lorusso, Lars Mikael Broman, Maximilian Malfertheiner, Jacques Creteur, Fabio Silvio Taccone
Summary: This study tested the CO2 removal performance of a new ECCO2R device in healthy pig models, showing that it can provide a high VCO2. Increasing gas flow incrementally significantly increased the amount of CO2 removal, and VCO2 tended to stabilize with higher gas flow rates.
Article
Environmental Sciences
Muhammad Waqas, Majid Nazeer, Man Sing Wong, Wu Shaolin, Li Hon, Joon Heo
Summary: The socio-economic restriction measures implemented in the United States have significantly reduced nitrogen dioxide (NO2) emissions. The study highlights the impact of factors such as human mobility, population density, income, climate, and stationary sources on the reduction of NO2 at different stations. The research emphasizes the scientific impacts of the NO2 reduction and income inequality revealed by the pandemic on air quality and health disparities.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Guorui Zhi, Jinhong Du, Aizhong Chen, Wenjing Jin, Na Ying, Zhihui Huang, Peng Xu, Di Wang, Jinghua Ma, Yuzhe Zhang, Jiabao Qu, Hao Zhang, Li Yang, Zhanyun Ma, Yanjun Ren, Hongyan Dang, Jianglong Cui, Pengchuan Lin, Zhuoshi He, Jinmin Zhao, Shuo Qi, Weiqi Zhang, Wenjuan Zhao, Yingxin Li, Qian Liu, Chen Zhao, Yi Tang, Peng Wei, Jingxu Wang, Zhen Song, Yao Kong, Xiangzhe Zhu, Yi Shen, Tianning Zhang, Yangxi Chu, Xinmin Zhang, Jiafeng Fu, Qingxian Gao, Jingnan Hu, Zhigang Xue
Summary: An comprehensive emission inventory for China in 2019, which includes both air pollutants and greenhouse gases, was developed in this study. The inventory utilizes existing frameworks and data to provide comparable emissions data and demonstrates the relationship between emissions and economic development.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
I-Ting Ku, Yong Zhou, Arsineh Hecobian, Katherine Benedict, Brent Buck, Emily Lachenmayer, Bryan Terry, Morgan Frazier, Jie Zhang, Da Pan, Lena Low, Amy Sullivan, Jeffrey L. Collett Jr
Summary: Unconventional oil and natural gas development (UOGD) in the United States has expanded rapidly in recent decades, raising concerns about its impact on air quality. This study conducted extensive air monitoring during the development of several large well pads in Broomfield, Colorado, providing a unique opportunity to examine changes in local air toxics and VOC concentrations during well drilling and completions and production. The study identified significant increases in VOC concentrations during drilling operations, highlighting the importance of emissions from synthetic drilling mud. The findings suggest opportunities to mitigate emissions during UOGD operations.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Puji Lestari, Akbar R. Tasrifani, Wiranda I. Suri, Martin J. Wooster, Mark J. Grosvenor, Yusuke Fujii, Vissia Ardiyani, Elisa Carboni, Gareth Thomas
Summary: This study developed field emission factors for various pollutants in peatland fires and estimated the total emissions. Gas samples were collected using an analyzer, while particulate samples were collected using air samplers. The study found significant emissions of CO2, CO, PM2.5, carbon aerosols, water-soluble ions, and elements from the fires in Central Kalimantan, Indonesia in 2019.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Ligang Li, Yuyu Chen, Lu Fan, Dong Sun, Hu He, Yongshou Dai, Yong Wan, Fangfang Chen
Summary: A high-precision retrieval method based on a deep convolutional neural network and satellite remote sensing data is proposed to obtain accurate methane vertical profiles.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Hyung Joo Lee, Toshihiro Kuwayama, Michael Fitzgibbon
Summary: This study investigated the changes in nitrogen dioxide (NO2) air pollution levels and their disparities in California, U.S. during the pandemic of coronavirus disease 2019 (COVID-19). The results showed a decrease in NO2 concentrations, especially in urban and high-traffic areas. However, socially vulnerable populations still experienced higher levels of NO2 exposure. The study suggests that reducing NO2 disparities, particularly racial inequity, can be achieved through continued regulatory actions targeting traffic-related NOx emissions.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Maria Chiara Pietrogrande, Beatrice Biffi, Cristina Colombi, Eleonora Cuccia, Umberto Dal Santo, Luisa Romanato
Summary: This study investigates the chemical composition and oxidative potential of PM10 particles in the Po Valley, Italy, and demonstrates the impact of high levels of atmosphere ammonia. The rural area had significantly higher ammonia concentrations compared to the urban site, resulting in higher levels of secondary inorganic aerosol. Although the SIA components did not contribute significantly to the PM10 oxidative reactivity, they were correlated with the oxidative potential measurements. This suggests that the contribution of SIA to PM oxidative toxicity cannot be ignored.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Natalie Allen, Jan Gacnik, Sarrah M. Dunham-Cheatham, Mae Sexauer Gustin
Summary: Accurate measurement of atmospheric reactive mercury is challenging due to its reactivity and low concentrations. The University of Nevada, Reno Reactive Mercury Active System (RMAS) has been shown to be more accurate than the industry standard, but has limitations including long time resolution and sampling biases. Increasing the sampling flow rate negatively affected RM concentrations, but did not impact the chemical composition of RM captured on membranes.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Chin-Yu Hsu, Wei-Ting Hsu, Ching-Yi Mou, Pei-Yi Wong, Chih-Da Wu, Yu-Cheng Chen
Summary: This study estimated the daily exposure concentrations of PM2.5 for elderly individuals residing in different regions of Taiwan using land use regression with machine learning (LUR_ML) and microenvironmental exposure (ME) models. The accuracy of the models varied across regions, with the ME models exhibiting higher predictions and lower biases. The use of region-specific microenvironmental measurements in the ME model showed potential for accurate prediction of personal PM2.5 exposure.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xiaohan Si, Kerrie Mengersen, Chuchu Ye, Wenbiao Hu
Summary: This study found that there is an interactive effect between air pollutants and weather factors, which significantly affects influenza transmission. Future research should consider the interactive effects between pollutants and temperature or humidity to evaluate the environment-influenza association.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Luxi Xu, Ruijun Xu, Yunshao Ye, Rui Wang, Jing Wei, Chunxiang Shi, Qiaoxuan Lin, Ziquan Lv, Suli Huang, Qi Tian, Yuewei Liu
Summary: This study aimed to evaluate the impact of ambient air pollution on hospital admissions for angina. The results showed that exposure to ambient particulate matter, sulfur dioxide, nitrogen dioxide, carbon monoxide, and ozone are associated with an increased risk of hospital admissions for angina. The association with nitrogen dioxide exposure was found to be the strongest.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xinyu Yu, Man Sing Wong, Majid Nazeer, Zhengqiang Li, Coco Yin Tung Kwok
Summary: This study proposes a novel method to address the challenge of missing values in satellite-derived AOD products and creates a comprehensive daily AOD dataset for the Guangdong-Hong Kong-Macao Greater Bay Area. By reconstructing missing values and developing a new model, the derived dataset outperforms existing products and agrees well with ground-based observations. Additionally, the dataset exhibits consistent temporal patterns and more spatial details.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Yidan Zhang, Yifan Xu, Bo Peng, Wu Chen, Xiaoyu Cui, Tianle Zhang, Xi Chen, Yuan Yao, Mingjin Wang, Junyi Liu, Mei Zheng, Tong Zhu
Summary: This study developed a sensitive method to measure the metallic components of atmospheric fine particulate matter (PM2.5) and compared the results with different analysis methods. The concentrations of metallic components in personal PM2.5 samples were found to be significantly different from corresponding fixed-site samples. Personal sampling can reduce exposure misclassifications, and measuring metallic components is useful for exploring health risks and identifying sources of PM2.5.
ATMOSPHERIC ENVIRONMENT
(2024)
Review
Environmental Sciences
Jamie Leonard, Lea Ann El Rassi, Mona Abdul Samad, Samantha Prehn, Sanjay K. Mohanty
Summary: Increasing concentrations of microplastics in the Earth's atmosphere could have adverse effects on ecosystems and human health. The deposition rate of airborne microplastics is influenced by both land use and climate, and a global analysis suggests that climate may have a greater impact on the concentration and deposition rate of microplastics than land use.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Tian Zhou, Xiaowen Zhou, Zining Yang, Carmen Cordoba-Jabonero, Yufei Wang, Zhongwei Huang, Pengbo Da, Qiju Luo, Zhijuan Zhang, Jinsen Shi, Jianrong Bi, Hocine Alikhodja
Summary: This study investigated the long-range transport and effects of North African and Middle Eastern dust in East Asia using lidar observations and model simulations. The results showed that the dust originated from multiple sources and had a long transport time. The vertical distribution of the dust was found to be crucial for assessing its impacts.
ATMOSPHERIC ENVIRONMENT
(2024)