Article
Water Resources
Davidson Egirani, Mohd T. Latif, Napoleon Wessey, Nanfe . R. Poyi, Nabila Shehata
Summary: Two forms of activated carbon, granular and powdered, were tested for mercury removal in solution using African palmae shell as precursor. The results showed that powdered activated carbon demonstrated the highest adsorption efficiency with 93%, while granular activated carbon showed 92% efficiency in terms of contact time.
APPLIED WATER SCIENCE
(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
Engineering, Environmental
Jingyu Zhang, Sijia Yu, Jingwei Wang, Zhi-Ping Zhao, Weiwei Cai
Summary: In this study, a novel process combining powered carbon (PC) and fluidized granular activated carbon (GAC) with ultrafiltration was proposed to achieve high effluent quality and reduce membrane fouling. It was found that fluidized spherical GAC (RGAC) was highly effective in reducing fouling associated with biochar, and the overall fouling rate of the system was even lower than that of a system using powdered activated carbon (PAC). The RGAC-biochar-UF system achieved similar effluent quality but better permeability compared to the RGAC-PAC-UF system, with a 20% cost savings, making it a promising water treatment system for large-scale applications.
Article
Engineering, Environmental
Yiming Su, Katherine R. Muller, Hira Yoshihara-Saint, Issam Najm, David Jassby
Summary: The study developed a flow-through, electrically charged, granular-activated carbon-filled column for effective nitrate removal from groundwater. High removal rate was achieved through a combination of electrosorption and electrochemical transformation, with the column being readily regenerated by reversing the polarity of the applied potential.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
M. Sarvajith, Y. Nancharaiah
Summary: This study found that the addition of GAC to AGS reactors can promote the enrichment of PAOs, shorten the start-up period for EBPR, and increase phosphorus removal efficiencies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
Sijia Yu, Jingwei Wang, Zhiping Zhao, Weiwei Cai
Summary: This study proposes a method that combines fluidized granular activated carbon (GAC) and PAC with the UF process to improve water treatment efficiency. The results show that fluidized GAC particles effectively remove PAC deposition and fouling. PAC improves the effluent quality by adsorbing humic acid-like substances, and the energy consumption of GAC fluidization is lower compared to conventional fouling control methods in UF. This integrated GAC-PAC-UF process is technically feasible and economically viable, potentially achieving high permeate quality and reducing membrane fouling.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Paper & Wood
Yanan Wang, Qingsong Ji, Haichao Li
Summary: Chitin-based activated carbon (CAC) was prepared through a two-step process of carbonization and potassium carbonate chemical activation. The CAC was characterized using SEM, N2 adsorption/desorption, FT-IR spectroscopy, and XPS. The adsorption performance of CAC for Orange II (O II) was evaluated, and the results showed that CAC had a high surface area, large pore volume, and strong adsorption capacity for O II. Equilibrium isotherms and thermodynamic analysis indicated the Langmuir model had better fitting and the adsorption process was spontaneous and endothermic. Therefore, CAC can be used as an efficient adsorbent for dye removal from wastewater.
Article
Engineering, Environmental
Tuerxun Tuerhong, Zaituniguli Kuerban
Summary: This study prepared activated carbons (ACs) using different activation agents from dairy cattle manure and applied them for H2S removal at room temperature. The results showed that ACs activated by CO2 exhibited better performance in H2S removal, with AC4 showing the best result. The micropore volume and basic surface pH played a crucial role in H2S removal, and the self-catalytic role of sulfur in AC4 contributed to the oxidation of H2S.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Miaomiao Zhao, Degang Ma, Xianfu Sun, Yuxin Wang, Qiji Wang
Summary: The in situ removal of Cd by low-voltage DC and GAC was efficient and avoided the secondary release of Cd. The method significantly improved Cd removal efficiency and reduced Cd mobility and risks, showing higher energy utilization efficiency compared to other methods using DC.
Article
Engineering, Environmental
Yongli Yang, Fred S. Cannon
Summary: This paper aims to find a biomass pretreatment protocol for preparing activated carbons without using commercial chemical additives. By employing a hydrothermal-pressure pre-conditioning protocol followed by pyrolysis/activation, the activated carbons produced exhibit superior adsorption capacities compared to a commercial activated carbon. Specifically, the high-pressure hydrothermal treatment achieved the highest specific surface area and micropore volume, with the highest adsorption capacity for both perfluorooctanoic acid and methylene blue. Adsorption rates and equilibrium sorption for perfluorooctanoic acid were well described by empirical models.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Almudena Benitez, Pedro Marquez, M. Angeles Martin, Alvaro Caballero
Summary: This study focuses on regenerating activated carbon from wastewater treatment plants as hosts for sulfur to prepare composite electrodes for lithium-sulfur batteries, showing excellent electrochemical performance and stability. The research successfully demonstrates the reuse of waste materials and provides a beneficial approach for the development of environmentally friendly batteries.
Article
Environmental Sciences
Alper Solmaz, Mesut Karta, Tolga Depci, Talip Turna, Zeynel Abidin Sari
Summary: This study aimed to remove oxytetracycline (OTC) from the ecosystem using activated carbon (LPAC) derived from Lemon Pulp (LP). The LPAC was characterized and its properties were analyzed using various techniques. The optimization of pH, reaction time, initial OTC concentration, and adsorbent amounts was performed for the adsorption study using LPAC with high porosity and micropores. The results showed that LPAC demonstrated high efficiency in removing OTC from water contaminated with antibiotics.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Energy & Fuels
Jun Li, Liqiang Zhang, Xiqiang Zhao, Mengze Zhang, Tai Feng, Binxuan Zhou, Tao Wang, Zhanlong Song, Chunyuan Ma
Summary: This study clarifies the effect of regeneration temperature on the physicochemical properties of activated coke and secondary SO2 removal performance, as well as explores the mechanism by which the circulating adsorbent is deactivated. The experimental results show that the physicochemical properties of powdered activated coke are significantly affected by the regeneration temperature, highlighting the importance of controlling this parameter to ensure efficient desulfurization.
Article
Engineering, Environmental
Xiaolong Shen, Tariq Hussain, Micala Mitchek, Joe Wong, Danny Reible
Summary: Activated carbon is widely used in water treatment for sorption of organic contaminants and as in-situ treatment for legacy contaminants. This study investigates the kinetics of PCB adsorption onto two forms of activated carbon (granular and powdered) over a period of 52 weeks. The results show that equilibrium adsorption is achieved much faster with powdered activated carbon compared to granular activated carbon.
Article
Environmental Sciences
Preeyanghaa Mani, Youngae Kim, Sandeep Kumar Lakhera, Bernaurdshaw Neppolian, Heechul Choi
Summary: The study investigated the efficient removal of arsenic from groundwater by oxidizing it with UV activated potassium persulfate (KPS) and subsequently adsorbing it on iron oxide impregnated granular activated carbon (FeO/GAC). The results showed nearly 100% removal efficiency was achieved within 1 hour for a 10 ppm arsenic solution, with the optimal pH range being 6.0-7.0. The presence of natural contaminants did not significantly affect the removal efficiency, with over 82% of arsenic removed in 90 minutes.
Correction
Thermodynamics
Hegazy Rezk, Mohamed R. Gomaa, Mohamed M. Marmoush, Nabila Shehata, Jean Henry
APPLIED THERMAL ENGINEERING
(2020)
Article
Nanoscience & Nanotechnology
Ahmed M. Shafeek, M. H. Khedr, S. El-Dek, Nabila Shehata
APPLIED NANOSCIENCE
(2020)
Article
Environmental Sciences
Enas Taha Sayed, Nabila Shehata, Mohammad Ali Abdelkareem, Muataz Ali Atieh
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Nanoscience & Nanotechnology
Doaa Moustafa, Rehab Mahmoud, Hanafy M. Abd El-Salam, Nabila Shehata
Summary: In this study, Zn-Fe LDH with nitrate as the interlayer anions was prepared via the co-precipitation technique and tested for the remediation of wastewater containing anionic methyl orange. The results showed that Zn-Fe LDH had a high adsorption capacity for methyl orange, with pH 7 being the optimum value for adsorption. The adsorption kinetics followed pseudo-first and -second order models, while the equilibrium data fit Langmuir model. Additionally, the recycled adsorbent was effective in managing another dye, methylene blue.
APPLIED NANOSCIENCE
(2021)
Review
Environmental Sciences
Nabila Shehata, Enas Taha Sayed, Mohammad Ali Abdelkareem
Summary: Geopolymerization technology is an effective alternative to cement with the ability to reduce CO2 emissions, lower building material costs, and minimize environmental impacts. Its key features include using alumina/silicate source materials and specific mixing and curing conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Green & Sustainable Science & Technology
A. G. Olabi, Khaled Obaideen, Mohammad Ali Abdelkareem, Maryam Nooman AlMallahi, Nabila Shehata, Abdul Hai Alami, Ayman Mdallal, Asma Ali Murah Hassan, Enas Taha Sayed
Summary: Clean and safe energy sources are crucial for society's long-term growth. Wind energy is rapidly expanding and helps reduce greenhouse gas emissions. Renewable energy development promotes energy security and sustainable development goals on a global scale. The article investigates wind energy's role within the SDGs and highlights the London Array wind farm's contribution to achieving these goals.
Article
Water Resources
Davidson Egirani, Mohd T. Latif, Napoleon Wessey, Nanfe . R. Poyi, Nabila Shehata
Summary: Two forms of activated carbon, granular and powdered, were tested for mercury removal in solution using African palmae shell as precursor. The results showed that powdered activated carbon demonstrated the highest adsorption efficiency with 93%, while granular activated carbon showed 92% efficiency in terms of contact time.
APPLIED WATER SCIENCE
(2021)
Article
Multidisciplinary Sciences
Medhat Mostafa, Hamdy Salah, A. B. Saddek, Nabila Shehata
BAGHDAD SCIENCE JOURNAL
(2020)
Article
Chemistry, Multidisciplinary
Medhat Mostafa, Hamdy Salah, Nabila Shehata
EGYPTIAN JOURNAL OF CHEMISTRY
(2020)
Article
Electrochemistry
Ahmed A. Kamel, Hegazy Rezk, Nabila Shehata, Jean Thomas
Article
Water Resources
Davidson Egirani, Mohd T. Late, Napoleon Wessey, Nanfe R. Poyi, Shukla Acharjee
APPLIED WATER SCIENCE
(2019)
Article
Water Resources
I. M. El-Naggar, Sayed A. Ahmed, Nabila Shehata, E. S. Sheneshen, Mahmoud Fathy, Amr Shehata
APPLIED WATER SCIENCE
(2019)