Article
Environmental Sciences
Athanasia K. Tolkou, Miroslava Vaclavikova, George P. Gallios
Summary: This research focuses on removing Cr(VI) from water using modified activated carbon with a combination of iron and manganese or copper oxides. The experimental results showed that NFM material had the highest Cr(VI) removal rate (99.7%) at pH 3 with a 3-hour contact time. The maximum adsorption capacity for NFM was found to be 44.42 mg/g using the Langmuir model, and the structure of the modified adsorbents materials was studied using BET and SEM characterization techniques.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Multidisciplinary Sciences
Hua Wang, Wencheng Wang, Song Zhou, Xuchun Gao
Summary: In order to guide the selection of woody-activated carbon for the treatment of Cr(VI)-containing wastewater, adsorption tests were conducted on two varieties of commercial woody-activated carbon powder. The physicochemical properties and structural characteristics of the activated carbon were studied, and the factors affecting the removal of hexavalent chromium were investigated. The results showed that both types of woody-activated carbon have microporous and mesoporous structures, with different adsorption capabilities depending on the concentration of Cr(VI).
Article
Chemistry, Multidisciplinary
Zobia Razzaq, Muhammad Hamayun, Shahzad Murtaza, Samia Kausar, Ataf Ali Altaf, Rizwan Ullah Khan, Tehzeen Javaid
Summary: This study investigates the use of activated carbons from virgin banana peduncle (ZR1) and iron-impregnated banana peduncle (ZR2) as adsorbents for the removal of As(V) and Cr(VI) ions from aqueous solutions. The adsorbents were characterized and the effects of various factors on metal ion adsorption were studied. The results showed that ZR1 and ZR2 had good adsorption capacities for both As(V) and Cr(VI) ions. Kinetic and thermodynamic parameters demonstrated the feasibility of the adsorption process, making ZR1 and ZR2 promising and cost-effective biosorbents for removing As(V) and Cr(VI).
Article
Environmental Sciences
Sajad Ur Rehman Beig, Shakeel A. Shah
Summary: This study synthesized microporous activated carbons from medicinal herb wastes and tested their effectiveness in removing dangerous Cr(VI) ions from water. The adsorption capacity, kinetics, and thermodynamic properties of different adsorbent materials were investigated. The results showed that the biosorbent made from Redroot pigweed exhibited high recyclability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Chemical
Zhengfeng Sun, Ming Chen, Geming Wang, Quanrong Deng, Shenggao Wang, Yuan Gao
Summary: A novel high-active porous activated biochar (KC) was prepared from orange peel through a two-step chemical activation method with KOH. The KC showed a large specific surface area, well-developed porous microstructure, rich oxygen-containing functional groups, and abundant surface-active sites, enabling an outstanding absorption capacity for Cr (VI) removal. Our work provides a feasible approach to optimize the microstructure of biochar for better adsorption performance. Rating: 8/10
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Lucas Spessato, Vitor A. Duarte, Jhessica M. Fonseca, Pedro A. Arroyo, Vitor C. Almeida
Summary: Nitrogen-doped activated carbons were prepared from Brazil nut shells using KOH-activation and N-doping with various compounds. The results showed that N-doping caused damage to the surface of the materials but contributed more to CO2 adsorption than high surface area values.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Biotechnology & Applied Microbiology
Zhenyu Wu, Hua Zhang, Enas Ali, Asfandyar Shahab, Haiyi Huang, Habib Ullah, Honghu Zeng
Summary: This paper prepared magnetic ferric oxide/activated carbon (Fe3O4@AC) using commercial activated carbon as a raw material and applied it for Cr(VI) adsorption in water. Results showed that Fe3O4@AC achieved a maximum Cr(VI) adsorption of 45.3 mg/g with a removal rate of 88.8% at the optimum conditions of pH 2.0 and adsorption time of 12 h. Characterization analysis suggested that the adsorption mechanism of Fe3O4@AC is mainly chemisorption supplemented by physical adsorption, with electrostatic attraction and complexation.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Environmental Sciences
Hong-Ming Tan, Chang-Gui Pan, Chao Yin, Kefu Yu
Summary: Per- and polyfluoroalkyl substances (PFASs) have gained attention for their persistence, bioaccumulation, and toxicity. Various activated carbons (ACs) show variability in adsorptive performance towards PFASs. This study comprehensively investigates the adsorption of ten PFASs on different ACs to understand their removal mechanism. Results indicate that GAC-1 and PAC-1 remove over 90% of all target PFASs, and the adsorption mechanisms involve electrostatic interaction, hydrophobic interaction, surface complexation, and hydrogen bonding.
ENVIRONMENTAL RESEARCH
(2023)
Article
Thermodynamics
Sergio Acevedo, Liliana Giraldo, Juan Carlos Moreno-Pirajan
Summary: This research conducted a calorimetric evaluation of activated carbon-type adsorbent solids prepared by chemical activation of African palm shells with Fe(NO3)(3) and Cu(NO3)(2) salts. The immersion enthalpy values of porous materials varied with different immersion liquids, chemical agents, and concentrations. The BET areas and pore volumes of the obtained adsorbent solids increased proportionally to the increase in immersion enthalpy values, showing variations in textural and chemical characteristics of porous solids.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Green & Sustainable Science & Technology
Aldair Vergel Rangel, Mariana Guerrero Becerra, Hernando Guerrero-Amaya, Luz M. Ballesteros, D. Fabio Mercado
Summary: Three low-cost and abundant agro-industrial residues have been used as hexavalent chromium adsorbents, with blackberry residues and spent ground coffee being the most efficient adsorbents. Avocado seeds showed the lowest adsorption efficiency, but increased significantly after treatment. The oxidation process resulted in changes in surface chemistry, improving the adsorption capacity of the materials.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Miroslaw Kwiatkowski, Elzbieta Broniek
Summary: This study focused on the preparation of activated carbons from various biomass materials and analyzed the influence of activation conditions on their porous structure and adsorption properties. The results showed that activated carbon derived from ebony wood at a specific mass ratio exhibited optimal adsorption capacity and surface uniformity, highlighting the effectiveness of the LBET method for analyzing porous structure.
Article
Green & Sustainable Science & Technology
M. Vorokhta, J. Novakova, M. Dopita, I. Khalakhan, V. Kopecky, M. Svabova
Summary: This study demonstrates that the microporosity of three-dimensionally ordered micromesoporous carbon (3DOmm) can be increased by physical activation, leading to improved CO2 capture performance. The activated 3DOmm carbon exhibits a highly porous amorphous structure with increased micropore and mesopore volumes and a higher specific surface area. Furthermore, the activated 3DOmm carbon shows excellent CO2 adsorption performance over a wide pressure range, with fast kinetics and high selectivity for CO2 over N2.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Green & Sustainable Science & Technology
Huiting Zeng, Honghu Zeng, Hua Zhang, Asfandyar Shahab, Kang Zhang, Yanqin Lu, Iqra Nabi, Faiza Naseem, Habib Ullah
Summary: The research demonstrates that eucalyptus activated carbon can effectively remove hexavalent chromium from water, with a significantly higher removal rate than eucalyptus carbon. The surface area of activated carbon increased significantly, and the adsorption process is influenced by multiple factors.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Luan de Souza Leite, Maria Teresa Hoffmann, Fabio Simoes de Vicente, Danilo Vitorino dos Santos, Luiz Antonio Daniel
Summary: The traditional bituminous activated carbon showed the best performance for AOM removal, followed by babassu coconut activated carbon. Additionally, significant reductions in trihalomethanes formation potential were achieved.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Chemical
Ji-Hyun Kim, Gibbum Lee, Jung-Eun Park, Seok-Hwi Kim
Summary: The study found that impregnating activated carbon with K2CO3 resulted in a specific surface area of 2162 m²/g, approximately 70% of that achieved using KOH (3047 m²/g). The XPS analysis showed the formation of C-O-K complexes on the surface of the carbon precursors regardless of the chemical agent used. XRD results confirmed the transformation of K2CO3 and KOH into KHCO3 and K4H2(CO3)3•1.5H2O during impregnation.
Article
Environmental Sciences
S. S. Mohanty, H. M. Jena
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2019)
Article
Engineering, Environmental
Satya Sundar Mohanty, Hara Mohan Jena
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2018)
Article
Energy & Fuels
Akanksha, A. K. Singh, D. Mohanty, H. M. Jena, Deepak Singh Panwar
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2020)
Article
Engineering, Environmental
Satya Sundar Mohanty, Hara Mohan Jena
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2019)
Article
Biotechnology & Applied Microbiology
Sangram Shamrao Patil, Hara Mohan Jena
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2019)
Review
Engineering, Environmental
Satya Sundar Mohanty, Hara Mohan Jena
JOURNAL OF WATER PROCESS ENGINEERING
(2019)
Article
Engineering, Chemical
Satya Sundar Mohanty, D. Karthik Reddy, Hara Mohan Jena
Summary: This study investigated the effect of external mass transfer on the rate of butachlor biodegradation using calcium alginate immobilized microbial consortium SMC1 in a re-circulated up-flow packed bed bioreactor. By assuming first-order biodegradation kinetics, various operational parameters and external mass transfer on butachlor removal were explored. The mass transfer correlations obtained accurately predicted the experimental data.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Dibya Ranjan Rout, Hara Mohan Jena
Summary: This study focuses on the batch adsorption of phenol from an aqueous solution using reduced graphene oxide (RGO) as an adsorbent. The optimized adsorption conditions were determined and various models were used to analyze the adsorption behavior. The results showed that RGO had the ability to regenerate and effectively remove phenol.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Dibya Ranjan Rout, Hara Mohan Jena
Summary: This study successfully synthesized a novel ternary composite that serves as an innovative and excellent adsorbent for wastewater treatment. The composite exhibited excellent Cr(VI) removal performance, with adsorption mechanisms involving electrostatic attraction, pi-pi interaction, ion exchange, and metal ion complexion.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Dibya Ranjan Rout, Hara Mohan Jena
Summary: In this study, the reduced form of graphene oxide (RGO) was synthesized and applied for the removal of Cr(VI). The results showed that the as-synthesized material had excellent adsorption performance and regeneration ability, making it suitable for industrial wastewater treatment.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Sangram Shamrao Patil, Hara Mohan Jena
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2019)
Article
Engineering, Chemical
Sangram Shamrao Patil, Hara Mohan Jena, Susmita Mishra
DESALINATION AND WATER TREATMENT
(2018)
Review
Engineering, Environmental
Anup Kumar Swain, Abanti Sahoo, Hara Mohan Jena, Hemalata Patra
JOURNAL OF WATER PROCESS ENGINEERING
(2018)
Review
Engineering, Environmental
Arvind Kumar, Hara Mohan Jena
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2017)
Article
Engineering, Environmental
Xingxing Hu, Lingjie Liu, Yanmeng Bi, Lu Li, Chunsheng Qiu, Jingjie Yu, Shaopo Wang
Summary: In this study, the impact of exogenous folate on the start-up process of single-stage partial nitritation-anammox (SPNA) was evaluated using two lab-scale reactors. The results showed that folate addition can enhance nitrogen removal rate, extracellular polymeric substances production, hydrazine oxidase and dehydrogenase activity, as well as the relative abundance of Candidatus Brocadia.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Shaocang He, Tingting Shen, Jing Sun, Haoqi Pan, Chenxu Sun, Tianpeng Li, Runyao Li, Enshan Zhang
Summary: A novel process of acid leaching neutralization was developed for the preparation of inorganic polymeric composite ferric aluminum silicate coagulant (CFAS) using solid waste coal gasification coarse slag (CGCS). The optimized preparation process was determined through single-factor experiment and the performance of CFAS was evaluated for domestic sewage treatment. The results showed that CFAS exhibited excellent coagulation ability and achieved significant removal efficiency for turbidity, ammonia nitrogen, and chemical oxygen demand.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Kinga Szatmari, Sandor Nemeth, Alex Kummer
Summary: In this article, a resilience-based reinforcement learning approach is proposed to address the potential thermal runaway issue in batch reactors. By calculating the resilience metric for reactors and utilizing Deep Q-learning to decide when to intervene in the system, resilient-based mitigation systems can be effectively developed.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Bingyou Jiang, Qi Yao, Mingqing Su, Jingjing Li, Kunlun Lu, Dawei Ding, Han Hong
Summary: This study investigates the inhibitory characteristics and mechanisms of ABC powder on coal powder explosion. The addition of ABC powder significantly decreases the maximum explosion pressure and can completely suppress coal dust explosions. The study also reveals the thermal decomposition characteristics and reaction kinetics of the mixed system.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Kubilay Bayramoglu, Mustafa Nuran
Summary: This study examines the feasibility of using pyrolytic oil from waste tires as fuel in diesel engines, and evaluates its energy, exergy, and sustainability. The results indicate that pyrolytic oil has potential as a renewable fuel source with relatively high thermal efficiency.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Xinru Duan, Yejia Lv, Jiaxing Hong, Jianzhong Wu, Jia Zhang, Yang Yue, Guangren Qian
Summary: This study successfully prepared a tube reactor with optimized catalyst formula, which showed good performance in removing dioxins and other pollutants in the experiments.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Jiaoyang Du, Xueming Dang, Xiaorong Gan, Xin Cui, Huimin Zhao
Summary: In this study, a photocatalyst-enzyme hybrid system was constructed, which solved the issue of enzyme inactivation caused by high concentration of H2O2 through photocatalytic in-situ H2O2 production, and improved the stability and catalytic efficiency of the enzyme. The effectiveness of the system in treating phenolic EDCs was confirmed through experiments.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Fu-Rong Xiu, Longsheng Zhan, Yingying Qi, Xinyue Lei, Jiali Wang, Haipeng Zhou, Wenting Shao
Summary: This study developed a synergetic and high-efficiency treatment of waste tantalum capacitors (WTCs) and polyvinyl chloride (PVC) using subcritical water process. The treatment significantly reduced the temperature and reaction time for metal tantalum recovery from WTCs, and improved the dechlorination efficiency of PVC. The optimized conditions resulted in 100% resin conversion efficiency of WTCs and 97.39% dechlorination efficiency of PVC. The interaction between decomposition products of WTCs and PVC produced a high level of benzoic acid.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Bingda Li, Jiaming Song, Yuting Li, Chaoying Meng, Shuxian Wang, Linghao Zong, Honggang Ye, Yishuai Jing, Feng Teng, Peng Hu, Haibo Fan, Guangde Chen, Xin Zhao
Summary: CdPS3 nanosheets, especially those exfoliated by sodium cholate, have shown highly efficient photocatalytic degradation performance. The strong dark adsorption and dye-sensitized photocatalytic properties of CdPS3 nanosheets contribute to high degradation efficiencies of various pollutants.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Environmental
Dongxu Ouyang, Yimei Pang, Bo Liu, Zhirong Wang
Summary: This study investigates the thermal runaway features of lithium-ion cells under tunnel conditions, considering different states of charge and tunnel ceilings. The results show that the tunnel visibility is affected by the smoke generated during thermal runaway, and the shape of the tunnel ceiling influences the temperature rise differently.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
