Article
Engineering, Environmental
Amanda Larasati, Geoffrey D. Fowler, Nigel J. D. Graham
Summary: Granular activated carbon adsorption is widely used for the removal of contaminants in water, requiring periodic regeneration. Chemical regeneration is identified as an effective alternative, but a suitable regenerant solution for a wide range of contaminants has not been identified yet.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Amanda Larasati, Geoffrey D. Fowler, Nigel J. D. Graham
Summary: The study demonstrates that in-situ chemical regeneration of granular activated carbon can effectively regenerate exhausted carbon by metaldehyde and isoproturon, achieving regeneration efficiencies of 82% and 45% respectively. The regenerant solution can be reused multiple times, and chemical regeneration does not alter the physico-chemical properties of the carbon.
Article
Engineering, Environmental
Zhichao Shen, Lu Zhan, Zhenming Xu
Summary: This study suggests a green regeneration method for activated carbon (AC) laden with Perfluorochemicals (PFCs) using molten NaOH, which has been shown to have higher defluorination efficiencies for PFCs like PFOS and PFBS compared to other molten sodium salts. Factors like temperature, holding time, and ratio of salt to carbon were found to be directly proportional to defluorination efficiency. The low thermal stability of PFOA was identified as the reason for its lower defluorination efficiency compared to PFOS and PFBS. Additionally, the use of molten NaOH resulted in reduced fluorine-containing gas emissions, reducing environmental risks and improving the adsorption capacity of the regenerated AC.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2022)
Article
Engineering, Environmental
Esther Vega, Hector Valdes
Summary: This study assesses the efficiency of hydrogen peroxide in the regeneration of dimethyl sulphide (DMS) exhausted-activated carbons (ACs), finding that high content of basic oxygen-containing functional surface groups and mineral fraction are responsible to promote the catalytic decomposition of hydroxide peroxide, leading to a higher formation of hydroxyl radicals and to the observed increase in the regenerative oxidation of adsorbed DMS.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Biochemistry & Molecular Biology
Tao Li, Xuehua Ren, Tianjiao Li, Lian Yu, Mingming Teng, Yi Zheng, Anmin Lei
Summary: To meet the demand for assisted reproduction and animal breeding, new superovulation drugs are needed to reduce the use of hormone drugs. This study investigated the role of inflammation and steroids in ovulation and found that sodium salicylate can regulate these factors. Mice were injected with different concentrations of sodium salicylate and the effects on oocyte quality and ovulation were examined, showing similar effects to the commonly used drug PMSG/FSH.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Environmental
Hanjing Xue, Xuemei Wang, Qi Xu, Fatma Dhaouadi, Lotfi Sellaoui, Moaaz K. Seliem, Abdelmottaleb Ben Lamine, Hafedh Belmabrouk, Abdullah Bajahzar, Adrian Bonilla-Petriciolet, Zichao Li, Qun Li
Summary: Activated carbons and MOF-based composites were prepared from ashitaba biomass for the adsorption of methylene blue, and results showed that the surfactant-functionalized activated carbon outperformed other adsorbents with an adsorption capacity exceeding 400 mg/g. This adsorbent shows promising application potential for treating wastewater polluted by dye molecules.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Yuwei Song, Yuanyuan Wang, Runping Han
Summary: In this study, a novel adsorbent PSAC developed from pine sawdust's pyrolytic carbon was successfully used to adsorb 2,4-DCP and 4-CP. The adsorption capacity of PSAC was significantly enhanced compared to PSPC. The adsorbents were characterized and the key factors influencing the adsorption process were investigated. PSAC exhibited strong adsorption capacities for 2,4-DCP and 4-CP and could be regenerated for reuse.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Hongjie Liu, Yunrui Su, Cheng Liu, Andi Zhou, Xiaomeng Chu, Shaojie Liu, Xuteng Xing, Erjun Tang
Summary: The study found that modified activated carbon can catalyze the oxidative coupling side reaction of APAP, and M-T-RAC can effectively inhibit this side reaction.
Article
Energy & Fuels
Jun Li, Jiahao Liu, Chengfei Li, Jiao Luo, Can Shen, Jianxiao Yang
Summary: By utilizing cigarette butt-derived activated carbon, the decolorization performance of waste edible oil was successfully improved, providing a successful case of waste recycling.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Environmental Sciences
Mohammed Abdillah Ahmad Farid, Mohd Ali Hassan, Ahmad Muhaimin Roslan, Hidayah Ariffin, Mohd Nor Faiz Norrrahim, Mohd Ridzuan Othman, Shirai Yoshihito
Summary: This study explores a decolorization strategy for crude glycerol obtained from biodiesel production using waste cooking oil, achieving simultaneous color removal and glycerol enrichment. By utilizing physico-chemical treatment and adsorption with activated carbon, high levels of color removal and glycerol content increase were observed. The resulting glycerol met quality standards and was cost-effective compared to commercial activated carbon.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Yujian Zhang, Lizhi He, Guoqiao Wang, Xinxin Zhang, Ya Liu, Yao Chen
Summary: The research shows that NaOH can effectively regenerate AC-La while maintaining its high fluoride removal efficiency. After multiple NaOH regeneration processes, the regeneration rate of AC-La remains stable at over 73.8%. NaOH has little impact on the pore structure and lanthanum loading of AC-La, while enhancing ion exchange during the F- desorption process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
V Sydorchuk, O. Poddubnaya, M. M. Tsyba, O. Zakutevskyy, O. Khyzhun, S. Khalameida, A. M. Puziy
Summary: The introduction of phosphorus in activated carbon alters its surface chemistry and photocatalytic activity, allowing for adsorption of metal cations and photodegradation of dyes. Phosphorus narrowing the bandgap plays a key role in increasing the photocatalytic activity.
APPLIED SURFACE SCIENCE
(2021)
Article
Environmental Sciences
Guanying Wang, Guanglei Qiu, Jian Wei, Zhuang Guo, Weiye Wang, Xiaoling Liu, Yonghui Song
Summary: With the development of industries, explosion accidents occur frequently during production, transportation, usage, and storage of hazardous chemicals. The activated carbon-activated sludge (AC-AS) process shows promising potential in efficiently treating wastewater with high concentrations of toxic compounds. In this study, AC and AS were used to treat wastewater from an explosion accident, resulting in increased removal efficiency and shortened treatment time compared to traditional processes. Metagenomic analysis and spectroscopy were used to explore the enhancement mechanism of AC on AS, revealing the important roles of certain bacteria and genes in pollutant degradation. This study demonstrates the universal characteristics of the AC-AS process for treating wastewater with high levels of organic matter and toxicity.
ENVIRONMENTAL RESEARCH
(2023)
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
Energy & Fuels
Danusorn Congsomji, Chinnathan Areeprasert
Summary: Activated carbon produced from sugarcane bagasse using hydrothermal carbonization and steam activation showed high efficiency in decolorizing syrup. The produced AC had high BET surface area and total pore volume, making it suitable for low-cost decolorization needs in sugar mills. Decolorization tests demonstrated the effectiveness of the AC, offering potential for circular utilization of agricultural residues.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
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)