Article
Anatomy & Morphology
Javed Khan, Muhammad Ishtiaq Ali, Asif Jamal, Mushtaq Ahmad, Jahangir Khan Achakzai, Muhammad Zafar
Summary: Two strategies for biodesulfisation (BDS) of a standard organosulfur compound were investigated in laboratory conditions.
MICROSCOPY RESEARCH AND TECHNIQUE
(2022)
Article
Biotechnology & Applied Microbiology
Olga Martzoukou, Diomi Mamma, Dimitris G. Hatzinikolaou
Summary: Microbial desulfurization is being extensively studied as a promising alternative to chemical desulfurization process, and an optimized culture medium has been reported here to alleviate the repression of catalytic activity caused by ubiquitous sulfur sources, thus making biodesulfurization more economically sustainable. This work represents a step towards the development of a more viable commercial biodesulfurization process.
BIOTECHNOLOGY AND BIOENGINEERING
(2023)
Article
Chemistry, Physical
Nika Yavani Hasanbeik, Mehrab Pourmadadi, Azam Ghadami, Fatemeh Yazdian, Abbas Rahdar, George Z. Kyzas
Summary: This study investigates the enhancement of biodesulfurization activity of Rhodococcus erythropolis IGTS8 using a new hybrid nanostructure. The results show that the presence of the nanostructure increases the biodesulfurization activity by 52%.
Article
Microbiology
Igor Martinez, Magdy El-Said Mohamed, Jose Luis Garcia, Eduardo Diaz
Summary: A synthetic DBT mineralization pathway has been engineered in recombinant cells, enabling efficient biodesulfurization of thiophenic compounds and crude oil. This novel approach overcomes the inhibitory effect of 2HBP and shows a significant increase in DBT removal, making it a promising candidate for future bioremediation and bioconversion strategies for oil-contaminated sites.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Olga Martzoukou, Sotiris Amillis, Panayiotis D. D. Glekas, Dimitra Breyanni, Margaritis Avgeris, Andreas Scorilas, Dimitris Kekos, Michalis Pachnos, George Mavridis, Diomi Mamma, Dimitris G. G. Hatzinikolaou
Summary: In this study, an advanced biocatalyst with three genetic modifications was constructed, which showed high biodesulfurization activities and could be produced in a simple and low-cost medium without the need for antibiotics. Transcript level quantification confirmed the effects of genetic engineering approaches on the mRNA ratios of recombinant strains and revealed a gene-specific differential increase in mRNA levels. These findings can potentially pave the way for economically viable biodesulfurization processes through further strain and process optimization.
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Energy & Fuels
Roselle Y. Mamuad, Angelo Earvin Sy Choi
Summary: The presence of elevated sulfur levels in diesel oil poses significant risks to human health, animals, the environment, vehicles, and infrastructure. Sulfur is a major contributor to particulate matter and emissions, and regulations regarding sulfur content in diesel fuel have become more stringent. Eco-friendly desulfurization techniques like biodesulfurization (BDS) are being explored, but further research is needed to fully understand the mechanism and make it more competitive in industrial applications. Combining BDS with other desulfurization technologies can potentially reduce costs and improve resource allocation.
Article
Geochemistry & Geophysics
Jiahui Tang, Yanxi Feng, Zengling Wu, Siyuan Zhang, Emmanuel Konadu Sarkodie, Huimin Jin, Ruiling Yuan, Wei Pan, Hongwei Liu
Summary: This research optimized the experimental conditions for biodesulfurization of sulfide ore, resulting in a significant increase in desulfurization efficiency and a reduction in the oxidizability and spontaneous combustion tendency of the ore after desulfurization.
Article
Chemistry, Physical
Vahid Mahmoudi, Ali Mojaverian Kermani, Mahboube Ghahramaninezhad, Ali Ahmadpour
Summary: This research investigated a new core-shell structured nanocatalyst prepared by surface modification of magnetic silica nanoparticles with Keplerate nano-porous molybdenum oxide-based polyoxometalate, which showed high catalytic activity in oxidative desulfurization reactions. By optimizing reaction conditions and experimental design, it was found that temperature had the most significant impact on the process efficiency. The catalyst exhibited excellent sulfur removal efficiency under optimal conditions, with no loss of activity after multiple test runs and successful recovery using a magnet.
MOLECULAR CATALYSIS
(2021)
Article
Engineering, Chemical
George Prasoulas, Konstantinos Dimos, Panayiotis Glekas, Styliani Kalantzi, Stamatis Sarris, Chrysovalantis Templis, Konstantinos Vavitsas, Dimitris G. Hatzinikolaou, Nikolaos Papayannakos, Dimitris Kekos, Diomi Mamma
Summary: BDS using resting cells of Rhodococcus erythropolis IGTS8 was investigated in a bubble column bioreactor with two-phase media, finding that biocatalyst performance was best at an OFP of 50% v/v, and biocatalysts from the exponential growth phase exhibited the highest biodesulfurization efficiency. A new semi-empirical model based on Michaelis-Menten kinetics was developed to describe the biphasic BDS process.
Article
Thermodynamics
Navin Mahto, Satyanarayanan R. Chakravarthy
Summary: This study presents the parametric design space study and optimization of a gas turbine combustor using computational fluid dynamics simulations. The combustor performance was evaluated based on various parameters, and the response surface methodology was used to analyze the effects of design variables. The exclusion of blow-off design points improved the accuracy and smoothness of the response surface predictions.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Physical
Hongcheng Mi, Longsheng Yi, Qian Wu, Jin Xia, Binghang Zhang
Summary: The utilization of red mud (RM) to prepare an adsorbent for heavy metal ions has attracted attention. By activating RM with Ca2+ and Mg2+ mixed solution neutralization and high-temperature treatment, a low-cost adsorbent was successfully prepared. The adsorbent displayed high adsorption capacity for Pb(II) and Zn(II) in liquid, making it a promising material for removing heavy metal ions from contaminated water.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Microbiology
Javed Khan, Muhammad Ishtiaq Ali, Asif Jamal, Jahangir Khan Achakzai, Jafir Hussain Shirazi, Abdul Haleem
Summary: In this study, various natural microbial consortia capable of desulfurizing dibenzothiophene (DBT) were isolated from hydrocarbon-contaminated soil samples using conventional enrichment technique. Through illumine sequencing, the most effective desulfurizing microbial consortium was identified. The I5 isolate, belonging to the bacterial phyla Proteobacteria, Bacteroidetes, Firmicutes, Patescibacteria, and Actinobacteria, exhibited high growth rate, desulfurization activity, and tolerance to the inhibitory effects of 2-HBP and SO4-2. It shows promising potential for future desulfurization studies of coal and other fossil fuels.
ARCHIVES OF MICROBIOLOGY
(2023)
Article
Chemistry, Physical
Selma Yonar, Emmanuel Lkechukwu Ugwu, Eyup Sabah
Summary: This study investigated the effects of parameters on the specific surface area and cation exchange capacity of sepiolite activated by citric acid. Optimal conditions for achieving maximum specific surface area and minimum cation exchange capacity were determined. The experimental and predicted values showed good conformity, indicating significant impact of process parameters on the properties of the activated sepiolite.
Article
Engineering, Chemical
Samia Benhammadi, Hakim Aguedal, Fouzia Ouazani, Abdelkader Iddou, Sheetal Sethi, Gaurav Goel
Summary: The removal of Cr(III) in aqueous solution was optimized by using activated sludge as an adsorbent. Response surface methodology was applied to assess the removal efficiency considering the combined effect of pH and contact time. The quantitative relationship between Cr(III) uptake and variable parameters was used to optimize the control level of each parameter. The model was statistically significant and verified through experimentation, providing valuable information on parameter interactions and optimum values.
CHEMICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Polymer Science
Shaoqiu Yan, Ying Tang, Gangping Bi, Bowen Xiao, Guotian He, Yuanchang Lin
Summary: In this study, response surface methodology (RSM) and central composite design (CCD) were used to improve the preparation of carbon nanotube and graphene (CNT-GN) sensing unit composite materials. Semi-empirical equations were developed to predict the sensitivity and compression modulus of the samples. The results showed a strong correlation between the experimental and expected values of sensitivity and compression modulus. The ideal preparation parameters for the composite were determined based on theoretical predictions and experimental findings.
Article
Engineering, Environmental
Hussein N. Nassar, Waleed I. M. El-azab, Nour Sh. El-Gendy
Summary: The study demonstrated that sustainable lignocellulosic spent waste rice straw (SWRS) has efficient pollutant removal ability for petroleum production produced water (PPPW) under various conditions, with a pseudo-second-order chemisorption process exhibiting spontaneous, favorable, and endothermic characteristics.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Motasem Y. D. Alazaiza, Ahmed Albahnasawi, Gomaa A. M. Ali, Mohammed J. K. Bashir, Dia Eddin Nassani, Tahra Al Maskari, Salem S. Abu Amr, Mohammed Shadi S. Abujazar
Summary: The review discusses the potential of natural coagulants for removing pharmaceutical compounds from water, highlighting their advantages such as biodegradability, safety, and availability compared to chemical coagulants. The main mechanisms of natural coagulants for pharmaceutical removal are charge neutralization and polymer bridges, with plant-based coagulants being more commonly studied due to their affordability. Further research is needed to develop reliable extraction methods and understand the effects of environmental factors, as natural coagulants have potential in providing green water and wastewater treatment technologies.
Article
Environmental Sciences
Hussein N. Nassar, Abdelrahman M. Rabie, Salem S. Abu Amr, Nour Sh El-Gendy
Summary: A halotolerant biosurfactant producer Pseudomonas aeruginosa strain NSH3 was found to enhance the biodegradation and biosurfactant-production activities for high concentrations of recalcitrant polyaromatic hydrocarbons (PAHs) and polyaromatic heterocyclic sulfur compounds (PASHs) when decorated with eco-friendly prepared magnetite nanoparticles (MNPs). The for applicability of MNPs-coated NSH3 in nanobioremediation (NBR) for in-vitro diesel oil-polluted sediment microcosms was also demonstrated.
ENVIRONMENTAL RESEARCH
(2022)
Review
Green & Sustainable Science & Technology
Mohammed Shadi S. Abujazar, Sakine Ugurlu Karaagac, Salem S. Abu Amr, Motasem Y. D Alazaiza, Mohammed J. K. Bashir
Summary: This study highlights the recent advanced applications of hybrid coagulants in wastewater treatment. The performance of inorganic/inorganic hybrid coagulation demonstrated high removal efficiency compared to organic removal efficiency. The optimum operational conditions for inorganic/organic coagulants at different pH levels lowered the cost for chemicals used for pH adjustment in treating industrial wastewater.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Analytical
Mohammed J. K. Bashir, Ong Sue Sheen, Choon Aun Ng, Mohammed Shadi S. Abujazar, Motasem Y. D. Alazaiza, Salim S. Abu Amr
Summary: Advanced treatment is required to meet the Malaysian discharge standard for biologically processed palm oil mill effluent (BIOTPOME) due to its high levels of COD, suspended solids, and oil and grease. The use of oxidation by thermally activated persulfate process proved effective in removing COD and color. Optimization of the process variables using central composite design resulted in an optimal performance with high COD and color removal efficiency.
Article
Engineering, Chemical
Abdallah R. Ismail, Hamdy Kashtoh, Mohamed A. Betiha, Salem A. Abu Amr, Kwang-Hyun Baek, Nour Sh. El-Gendy
Summary: In this study, amine-functionalized nano-silica was prepared and used to immobilize lipase, resulting in a stable nanobiocatalyst. The biodiesel transesterification process was optimized using response surface methodology, achieving high conversion and yield. The synthesized material exhibited long lifetime, operational stability, and reusability.
INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING
(2022)
Review
Energy & Fuels
Motasem Y. D. Alazaiza, Ahmed Albahnasawi, Tahra Al Maskari, Mohammed Shadi S. Abujazar, Mohammed J. K. Bashir, Dia Eddin Nassani, Salem S. Abu Amr
Summary: The search for alternative energy sources is driven by increasing energy demands and environmental pollution caused by fossil fuel usage. Recent investigations have reported the efficiency of microalgae for biofuel production due to its low production cost, rapid growth rate, and ability to thrive in harsh environments. This review discusses the latest advances in the application of microalgae for biofuel production, including cultivation and harvesting systems, environmental factors affecting cultivation, and lipid extraction and conversion technologies. Furthermore, promising strategies such as mixotrophic cultivation and green harvesting methods using bio-coagulants and flocculants are also presented. Future research should focus on co-cultivation systems, new green harvesting methods, high lipid extraction methods, and optimizing lipid extraction and conversion processes to enhance the sustainability of microalgae application for biofuel production.
Review
Energy & Fuels
Motasem Y. D. Alazaiza, Ahmed Albahnasawi, Murat Eyvaz, Tahra Al Maskari, Dia Eddin Nassani, Salem S. S. Abu Amr, Mohammed Shadi S. Abujazar, Mohammed J. K. Bashir
Summary: Algae can be used to produce valuable compounds and biofuels, and their waste can also be converted into biofuel, biogas, and biochar through different thermochemical processes. Algal biochar carbonized at high temperatures shows excellent performance in applications such as CO2 adsorption and energy storage. Algae biomass pyrolysis at moderate and low temperatures can produce high-quality biochar and coal fuel, respectively. In addition, algae-based biopolymers are considered a potential alternative for establishing a sustainable circular economy globally due to their composting capacity, rapid growth ability, and greenhouse gas emission reduction.
Article
Green & Sustainable Science & Technology
Nour Sh. El-Gendy, Hussein N. Nassar, Abdallah R. Ismail, Hager R. Ali, Basma Ahmed Ali, Khaled M. Abdelsalam, Manal Mubarak
Summary: In the framework of a sustainable marine bioeconomy, an advanced, eco-friendly, fully integrated biorefinery process for marine Ulva fasciata macroalgae is described. This process serves as a solution for ecosystem bioremediation, effective utilization of marine macroalgal resources, and promoting a green and low-carbon economy.
Article
Chemistry, Analytical
Motasem Y. D. Alazaiza, Shan He, Dongxiao Su, Salem S. Abu Amr, Pey Yi Toh, Mohammed J. K. Bashir
Summary: The recovery of wastewater is crucial for effective water resource management and addressing regional or seasonal water shortages. Using algae to clean wastewater provides significant benefits, including reducing the formation of hazardous solid sludge and creating valuable algal biomass through nutrient recycling. This study demonstrates the efficacy of microalgal bioremediation in simultaneously treating COD, NH3-N, and orthophosphate in domestic wastewater while enabling biomass production.
Review
Engineering, Chemical
N. Vasumathi, Anshuli Sarjekar, Hrishikesh Chandrayan, K. Chennakesavulu, G. Ramanjaneya Reddy, T. V. Vijaya Kumar, Nour Sh. El-Gendy, S. J. Gopalkrishna
Summary: Due to its industrial applications, graphite is an important carbon allotrope. It is widely used in refractories and batteries, among other industries. The demand for high-purity graphite with large flakes is increasing, leading to the need to process low-grade ores. Flotation, a hydrophobic process, is commonly used to beneficiate low-grade graphite ores. This review discusses various beneficiation techniques including pretreatment processes, liberation/grinding methods, different flotation methods, and the use of conventional and environmentally friendly flotation reagents for graphite separation.
INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
M. M. A. Ayash, S. S. Abu Amr, A. F. M. Alkarkhi, M. Y. D. Alazaiza, R. J. A. Hamad
Summary: The study investigated the combined persulfate oxidation process and tannin via coagulation-flocculation processes as a post treatment of anaerobically treated palm oil mill effluent. The simultaneous reaction improved the removal efficiencies of COD, color, and NH3-N, demonstrating promising potential for industrial wastewater treatment.
GLOBAL NEST JOURNAL
(2021)
