Article
Environmental Sciences
Tausif Ahmad, Xiaowei Liu, Chandan Guria
Summary: This study focuses on improving the hydrophilicity, morphology, and antifouling characteristics of polyvinyl chloride (PVC) membranes for separating oily wastewater by incorporating modified bentonite. The surface of bentonite nanoparticles is modified using surface-initiated atom transfer radical polymerization (SI-ATRP) with acrylamide grafted bentonite (AAm-g-bentonite). Various techniques, such as FTIR, TGA, sedimentation tests, FE-SEM, etc., are employed to study the modified bentonite nanoparticles. A flat-sheet PVC-based membrane is prepared by blending AAm-g-bentonite using the nonsolvent induced phase separation (NIPS) technique. The performance of the mixed-matrix membranes is characterized using FE-SEM, FTIR, sedimentation test, contact angle, porosity, antifouling property, and filtration studies of pure and oily water. The presence of modified bentonite (AAm-g-bentonite) improves membrane performance, with the best result achieved at PVC/AAm-g-ben-8 (8 wt% of AAm-g-bentonite), exhibiting enhanced pure water flux, permeate flux, and oil rejection.
Article
Polymer Science
Manikandan Gomathy Nainar, Gayathri Devi Purushothaman, Helen Kalavathy Meyyappan
Summary: In this study, PAN membranes were prepared by physically blending with bentonite inorganic fillers to improve its hydrophilicity. The membrane properties were evaluated through SEM and ATR-FTIR analysis. The performance of the membranes was assessed through Pure Water Flux (PWF) and anti fouling property. Amongst the prepared membranes, the composition of PAN (15 wt%), NMP (84.5 wt%) and bentonite (0.5 wt%) showed the highest removal of oil with increased porosity, equilibrium water content (EWC), PWF and hydrophilicity.
Article
Engineering, Environmental
Moein Besharati Fard, Donya Hamidi, Kaan Yetilmezsoy, Javad Alavi, Fatemeh Hosseinpour
Summary: This study is the first attempt to use Alyssum mucilage as a coagulant for oily-saline wastewater treatment, conducting comprehensive mathematical, kinetic, and statistical analyses to achieve a quantitative definition and optimization of the new coagulant.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Environmental
M. Monsefi Khosroshahi, Y. Jafarzadeh, M. Nasiri, M. Khayet
Summary: The synthesis of PEG-b-PDCE di-block copolymer and the preparation of PVC/PEG-b-PDCE blend membranes improved the membrane permeability and anti-fouling performance, showing promising applications in oily wastewater treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Chemistry, Physical
Shugong Gao, Tingyun Ge, Bo Li, Jiazang Chen
Summary: The strategy of electronic doping can enhance electrostatic interaction to aggregate contaminants and induce the hydrolysis of hydrated cations, synergistically facilitating photocatalytic mineralization.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Wirginia Tomczak, Marek Gryta
Summary: This study investigated the applicability of ultrafiltration ceramic membrane for separation of oily wastewaters in maritime transportation. It confirmed the excellent separation properties of the membrane, but also identified membrane fouling issues, which could be effectively cleaned using NaOH and H3PO4 solutions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Junwen Ding, Jinlong Wang, Xinsheng Luo, Daliang Xu, Yatao Liu, Peijie Li, Shirong Li, Rui Wu, Xinlei Gao, Heng Liang
Summary: This study proposed a novel strategy for controlling membrane fouling in continuous oily wastewater purification, which combined passive and active methods to reduce fouling. The addition of delta-MnO2 decoration layer and catalytic cleaning effectively improved the surface properties of the membrane, resulting in high water permeation flux and durable anti-oil-fouling performance. The membrane also showed high cleaning efficiency in the peroxymonosulfate (PMS) cleaning process.
Article
Engineering, Environmental
Chong Shen, Qian Zhang, Qin Meng
Summary: The hydrophilic hollow fiber membrane (HFM) prepared by grafting sulfobetaine methacrylate (SBMA) onto polysulfone (PSU) showed high efficiency in removing oil substances in wastewater and could completely recover flux through cleaning process.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Chemical
Seyed Ali Naziri Mehrabani, Tannaz Sadeghi Rad, Vahid Vatanpour, Alireza Khataee, Mustafa Kaya, Bihter Zeytuncu, Ismail Koyuncu
Summary: The incorporation of CuCr NLDH-GO improves the hydrophilicity, permeability, and antifouling properties of PVC ultrafiltration membranes. The addition of CuCr NLDH-GO significantly enhances the hydrophilicity, resulting in a nearly twofold increase in pure water permeability. Furthermore, the modified membranes show improved antifouling performance and dye rejection capabilities.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Umair Baig, Abdul Waheed
Summary: A polymeric-inorganic nanocomposite membrane with self-cleaning properties was fabricated for treating water-containing emulsified oily feed. The membrane showed high separation efficiency and photocatalytic cleaning ability.
Article
Engineering, Chemical
Mengjiao Yan, Kangying Guo, Yue Gao, Qinyan Yue, Baoyu Gao
Summary: This study investigates the coagulation-ultrafiltration integrated process for oily wastewater treatment. It is found that polyaluminum chloride (PAC) is more effective than AlCl3 and Fe based coagulants. The PAC-PDMDAAC coagulation system forms large and loose flocs, indicating efficient removal of oil droplets.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Dongqi Sun, Zhen Zhou, Qiang Ming, Jiaming Guo, Xiaofang Ye, Yao Yuan, Maonan Zhang, Xiaodan Zhao, Lu-man Jiang, Qing Xia
Summary: By adjusting temperature, reaction time, and the dosage of PAM, significant improvements in chloride removal and the settleability and dewaterability of FS precipitate were achieved. The optimal temperature for these processes was found to be 40°C, where particle size enlargement and crystal growth and aging were promoted to enhance the separation efficiency.
Article
Biochemistry & Molecular Biology
Hajer Aloulou, Afef Attia, Wala Aloulou, Sudip Chakraborty, Lassaad Baklouti, Lasaad Dammak, Raja Ben Amar
Summary: This work aims to determine the optimized ultrafiltration conditions for the treatment of industrial wastewater with oil and heavy metals. A ceramic multitubular membrane was used for efficient removal, and statistical analysis and optimization techniques were applied to find the best operating conditions. The study also investigated the effect of concentration under the optimized conditions and estimated the fouling mechanism using Hermia's model. The efficiency of membrane regeneration was proved by testing water permeability after chemical cleaning.
Article
Agricultural Engineering
Moein Besharati Fard, Donya Hamidi, Javad Alavi, Reza Jamshidian, Alireza Pendashteh, Seyed Ahmad Mirbagheri
Summary: The study found that Lallemantia mucilage, as a novel natural coagulant, showed excellent performance in treating saline oily wastewater, with high COD removal efficiency and surfactant removal capacity. The results demonstrated the effectiveness of the optimal treatment conditions and kinetic models.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Engineering, Environmental
Jiaming Guo, Zhen Zhou, Qiang Ming, Zhuojun Huang, Jun Zhu, Sheng Zhang, Jie Xu, Jiafu Xi, Qiqi Zhao, Xiaodan Zhao
Summary: A novel process was proposed to recover dechlorination precipitate from saline wastewater as poly aluminum chloride (PAC) in this study. Through leaching experiments, it was found that high basicity PAC could be efficiently achieved, reducing the residual Al3+ in treated water. PAC recovery could efficiently compensate chemical cost for Cl removal, which was economically beneficial and inspirable for utilization of Friedel's salt in other domains.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Engineering, Environmental
Tausif Ahmad, Chandan Guria
Summary: Various industries generate wastewater containing toxic contaminants, and low-cost polyvinyl chloride (PVC) has attracted attention as a membrane material. However, fouling of hydrophobic PVC membranes is a major hindrance. To improve their performance, the hydrophilicity and fouling resistance properties of the PVC membranes should be enhanced. This review provides an overview of current trends, research, and developments in PVC membranes and discusses potential approaches for improving their performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Energy & Fuels
Moumita Maiti, Prathibha Pillai, Aniruddha Sharma, Ajoy Kumar Bhaumik, Ajay Mandal
Summary: In this study, the effect of two ionic liquids on the formation and dissociation of hydrates was investigated. The results showed that these ionic liquids were effective in inhibiting hydrate formation both thermodynamically and kinetically. The induction time and formation rate of hydrates were significantly increased in the presence of these ionic liquids compared to pure water. Additionally, the performance of the ionic liquids in hydrate inhibition increased with increasing alkyl chain length.
Article
Chemistry, Physical
Rohit Kumar Saw, Prathibha Pillai, Ajay Mandal
Summary: In recent decades, low salinity water flooding (LSWF) has gained attention for its effectiveness in oil recovery. However, there is a lack of studies in the literature on the potential of using Ionic Liquids (ILs) as candidates for chemical enhanced oil recovery (CEOR) combined with LSWF. This study evaluates the synergistic effect of ILs with varying chain lengths with low saline ion tuned seawater (ITSW) for enhanced oil recovery from carbonate reservoirs. The analysis shows that ILs demonstrate a better synergistic effect with ITSW, reducing interfacial tension, altering rock wettability, and exhibiting less adsorption density at the reservoir temperature. ILs with the longest chain length ([C12mim] [BF4]) show superior properties and significantly increase oil recovery in low saline ITSW.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Yogesh Dhandhi, Om Prakash, Tarun Kumar Naiya, Chandan Guria
Summary: This paper utilizes a simple and efficient response surface method (RSM) technique to optimize the crude oil dehydration efficiency using two different demulsifiers. The study focuses on the influence of factors such as demulsifier concentration, settling time, temperature, and oil content. The experiments were designed using Central Composite Design (CCD) based on RSM, and the ANOVA analysis was used for model accuracy and optimization. The results demonstrate the significant impact of all factors on demulsification efficiency, with oil content being the most dominant factor. Additionally, the CCD-based model was found to be more accurate in predicting demulsification efficiency compared to the Box-Behnken design (BBD) based method.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Sidharth Gautam, Chandan Guria
Summary: This paper evaluates a relatively new shear rate equation based on the phenomenological model to estimate frictional pressure drop in high yield stress drilling fluids under different flow regimes. The proposed density model is experimentally validated and found to accurately predict density at downhole conditions. The HB model is more accurate than the RS model in predicting pressure drop.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Dinesh Joshi, Neetish Kumar Maurya, Narendra Kumar, Ajay Mandal
Summary: This study investigates the use of silica nanoparticles, surfactants, and polymers in enhancing oil recovery from oil fields. The synergy of these components is shown to reduce interfacial tension, alter wettability, emulsify, and improve viscosity. Core flooding experiments demonstrate that the nanofluid system provides higher incremental oil recovery, particularly in high permeability cores. Different mechanisms, including wettability alteration and pore plugging, contribute to the increased recovery. This research provides valuable insights into the application of silica nanoparticles with surfactants and polymers as chemical enhanced oil recovery agents.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Nazmun Sultana, Chandan Guria, Vinod K. Saxena
Summary: The study investigates the renewable synthesis of AA-type monomers, namely adipic and azelaic acid, from linoleic acid using a bromide-promoted transition metal catalyst. Liquid-phase catalytic oxidation is conducted using a Co(II)-Mn(II) acetate catalyst system and hydrogen bromide in an acetic acid solvent. The influence of process variables on LA conversion and product yields is studied, and the rate-controlling step for LA oxidation is analyzed.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Environmental Sciences
Tausif Ahmad, Xiaowei Liu, Chandan Guria
Summary: This study focuses on improving the hydrophilicity, morphology, and antifouling characteristics of polyvinyl chloride (PVC) membranes for separating oily wastewater by incorporating modified bentonite. The surface of bentonite nanoparticles is modified using surface-initiated atom transfer radical polymerization (SI-ATRP) with acrylamide grafted bentonite (AAm-g-bentonite). Various techniques, such as FTIR, TGA, sedimentation tests, FE-SEM, etc., are employed to study the modified bentonite nanoparticles. A flat-sheet PVC-based membrane is prepared by blending AAm-g-bentonite using the nonsolvent induced phase separation (NIPS) technique. The performance of the mixed-matrix membranes is characterized using FE-SEM, FTIR, sedimentation test, contact angle, porosity, antifouling property, and filtration studies of pure and oily water. The presence of modified bentonite (AAm-g-bentonite) improves membrane performance, with the best result achieved at PVC/AAm-g-ben-8 (8 wt% of AAm-g-bentonite), exhibiting enhanced pure water flux, permeate flux, and oil rejection.
Article
Chemistry, Physical
Rohit Kumar Saw, Anshuman Singh, Neetish Kumar Maurya, Ajay Mandal
Summary: Low salinity water flooding is cost-effective and environmentally friendly, and the addition of nanoparticles and polymers can significantly increase oil recovery. The viscosity of complex chemical slugs can be increased by adding nanoparticles to polymer solutions. Low salinity water requires a lower concentration of polymer to reach the target viscosity compared to high saline formation water. The addition of nanoparticles reduces interfacial tension and contact angle, leading to higher oil recovery in low salinity water. Injection of low salinity water-based complex fluid results in incremental recovery of OOIP compared to low salinity water and conventional formation water flooding.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Multidisciplinary
Rohit Kumar Saw, Deep Sinojiya, Prathibha Pillai, Shubham Prakash, Ajay Mandal
Summary: This study aims to investigate the synergistic effects of two nonionic surfactants (Tergitol 15-S-12 and PEG 600) on surface properties, including surface tension, interfacial tension (IFT), and wettability alteration, in chemically enhanced oil recovery (EOR). The optimum composition of the surfactant mixture, determined through surface tension measurement, showed a minimum surface tension value of 30.3 mN/m at a concentration of 225 ppm of Tergitol 15-S-12 and 1 wt % of PEG 600. The surfactant mixture exhibited an ultra-low IFT of 0.672 mN/m at optimum salinity. The wettability alteration study revealed a shift in rock wettability from oil-wet to water-wet region through contact angle observations and X-ray diffraction analysis.
Article
Energy & Fuels
Rohit Kumar Saw, Ajay Mandal
Summary: The low salinity water flooding (LSWF) technique is cost-effective and environmentally friendly, but its mechanisms are not yet clear. Recovery in LSWF depends on fluid/fluid and rock/fluid interactions. This study investigated both interactions and found different optimal conditions for improved oil recovery. Rock/fluid interaction showed an incremental recovery of 14%, while fluid/fluid interaction showed an incremental recovery of 7% over simple seawater injection. Results highlight the importance of considering both interactions and wettability alteration in LSWF design.
Article
Chemistry, Physical
Dinesh Joshi, Neetish Kumar Maurya, Ajay Mandal
Summary: The application of graphene oxide nanosheets (GONs) in enhanced oil recovery has been shown to have unique characteristics, including reduction of interfacial tension and alteration of wetting properties. Experimental results demonstrate that GONs can alter the wettability of rock surfaces, leading to increased oil recovery.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Chandan Guria
Summary: This paper evaluates the effect of non-ideal gas behavior on the Klinkenberg gas slippage effect for measuring the permeability of porous media. It proposes a comprehensive mathematical model that combines the first-order Klinkenberg slippage effect and virial equation of state to predict the apparent permeability of porous media to non-ideal gases. The methodology is validated using experimental data and accounts for the temperature-dependency of apparent permeability.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Moumita Maiti, Ajoy Kumar Bhaumik, Ajay Mandal
Summary: Hydrate inhibitors are crucial for preventing hydrate growth and ensuring smooth drilling operations. Water-soluble polymers, such as polyvinyl pyrrolidone (PVP K-90), have been found effective in reducing hydrate formation rates. This study investigates the influence of PVP K-90 concentration on hydrate inhibition in predesigned drilling fluids containing methane, ethane, and propane.
GAS SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
Rohit Kumar Saw, Pranali M. Rane, Dinesh Joshi, Shubham Prakash, Lavisha Jangid, Ajay Mandal
Summary: In recent years, there has been increasing interest in the application of natural surfactants in enhanced oil recovery (EOR) due to environmental concerns. This study introduces a novel non-ionic surfactant synthesized from olive oil and evaluates its properties. The synthesized surfactant showed effective emulsification, wettability modification, and efficient oil displacement. Additionally, the surfactant had a low critical micelle concentration, indicating its ability to reduce interfacial tension.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
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)
