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Removal of 2,6-dichlorophenol by adsorption with activated polypropylene nanofiber

Journal of King Saud University - engineering Sciences 2024年第8期36卷 677-683页

作者： Krishnaiah, Duduku Baskaran, Arswitaa Anisuzzaman, S.M. Reddy Prasad, D.M. Chemical Engineering Programme School of Engineering and Information Technology Universiti Malaysia Sabah Sabah Kota Kinabalu88999 Malaysia Petroleum and Chemical Engineering Programme Area Faculty of Engineering Universiti Teknologi Brunei Tungku Highway GadongBE1410 Brunei

2,6-Dichlorophenol is an organochloride of phenol, and it is considered one of the emerging pollutants in wastewater due to its extreme corrosive nature and toxicity even at low concentrations. Melt-blown activated polypropylene (PP) nanofiber is a polymeric adsorbent and it is used to investigate the removal of 2,6-dichlorophenol. The high surface-to-volume ratio, high porosity, low surface energy, low density, and excellent mechanical characteristics of melt-blown PP nanofiber make it a suitable adsorbent. On the removal efficiency of 2,6-dichlorphenol, the influence of the initial concentration of 2,6-dichlorphenol, the weight of PP nanofiber utilized, temperature, and pH of the solution were examined. The Langmuir model, with a maximum adsorption capacity of 44.44 mg/g, was found to be the best match for the adsorption isotherm. Scanning Electron Microscopy (SEM) and Fourier-Transform Infrared Spectroscopy were used to examine melt-blown PP nanofiber before and after adsorption (FTIR). Through SEM images, it was proven that the average diameter of PP nanofiber after adsorption had increased up to 7.93 μm. Furthermore, the existence of phenolic chemicals on the surface of PP nanofiber is confirmed by FTIR analysis spectra. The pseudo-first-order model matched the kinetic data nicely. © 2021 The Authors

关键词： Scanning electron microscopy

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A new approach to predict the formation pressure using multiple regression analysis: Case study from the Sukharev oil field reservoir – Russia

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Journal of King Saud University - engineering Sciences 2024年第8期36卷 694-700页

作者： Ponomareva, Inna N. Martyushev, Dmitriy A. Kumar Govindarajan, Suresh Department of Oil and Gas Technologies Perm National Research Polytechnic University Perm614990 Russia Petroleum Engineering Programme Department of Ocean Engineering Indian Institute of Technology – Madras Chennai India

Formation pressure is an important indicator of field production potential. Currently, the common practice to estimate reservoir pressure is the hydrodynamic exploration test. This method requires shutting down the well, often for a long time. Such long shutdowns lead to less production from the reservoir and worsen the economics of the field. Here, we present the method for determining the pressure without shutting down the well by using statistical methods for such tasks. In this article, we describe the method of finding the formation pressure by using multidimensional multivariate analysis of the actual reservoir data from the Sukharev field. To build the model, several operational, geological, and reservoir properties at various stages of the field pressure were combined into a model to predict reservoir pressure. Results showed that with this simple statistical method, formation pressure varies in two distinctive stages. In the first stage, the formation pressure is influenced by the reservoir petrophysical parameters, whereas in the second stage, operational parameters were more prominent. Finally, three separate formations in the Sukharev field were examined to predict reservoir pressure, and the results were in very good agreement with the actual measured data. This confirmed that the method was practical and capable of predicting reservoir pressure at any time of the well's lifetime. © 2022 The Authors

关键词： Regression analysis

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The Study of the Integration Between Pectin and Sodium Dodecyl-Sulfate on Oil Recovery

The Study of the Integration Between Pectin and Sodium Dodec...

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2024 SPE Nigeria Annual International Conference and Exhibition, NAIC 2024

作者： Musa, M.S.M. Adam, N.H.B. Gbonhinbor, J.R. Ridzuan, N. Mahat, S.Q.A. Yakasai, F. Ngouangna, E.N. Oseh, J.O. Agi, A. Oil and Gas Engineering Programme Faculty of Engineering Universiti Malaysia Sabah Jalan UMS Sabah Kota Kinabalu Malaysia Department of Petroleum Engineering Niger Delta University Wilberforce Island Bayelsa State Amassoma Nigeria Faculty of Chemical and Process Engineering Technology College of Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Pahang Gambang Malaysia Department of Chemical and Petroleum Engineering Faculty of Engineering Bayero University Kano Nigeria Department of Petroleum Engineering School of Chemical and Energy Engineering Faculty of Engineering Universiti Teknologi Malaysia Johor Bahru Malaysia

ISBN: (纸本)9781959025474

Surfactant flooding is a recognized technique within the realm of chemical enhanced oil recovery (CEOR), to enhance oil recovery in cases of continual depletion in conventional oil reserves. This method has a track record of effectively increasing oil recovery rates. The process involves multiple factors, including the reduction of interfacial tension (IFT), alterations in wettability, the creation of foam, and emulsification. Despite its success, a primary concern associated with surfactant flooding is the emergence of increased fingering effects, resulting in conformance issues like excessive water production. The primary objective of this research is to examine the interaction between pectin and sodium dodecyl sulfate (SDS) in the context of oil recovery, assessing the collaborative potential of pectin in conjunction with SDS to amplify oil production, and evaluating the impact of sodium chloride (NaCl) salinity on the behaviour of pectin and SDS in the context of oil recovery. To address water production concerns, this study employs polymer to augment water viscosity. The interaction between pectin and SDS will be scrutinized by observing three distinct sand packs, each containing surfactant, polymer, and a surfactant-polymer combination, respectively. The findings indicated significant improvements in oil recovery using different enhanced oil recovery (EOR) techniques. Freshwater flooding resulted in a 15% increase in oil recovery compared to saltwater flooding. Polymer flooding with a concentration of 0.6 wt% demonstrated the highest efficacy of 77.85% improvement in oil recovery compared to waterflooding. Surfactant flooding, while slightly less effective than polymer flooding, but still showed a remarkable 48.94% increase in oil recovery after waterflooding. However, surfactant flooding's effectiveness could be constrained by factors like reservoir characteristics and fluid properties. Despite this, the study revealed that combining surfactant and polymer fl

关键词： Surface active agents

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Development and study of a visco-elastic gel with controlled destruction times for killing oil wells

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Journal of King Saud University - engineering Sciences 2022年第7期34卷 408-415页

作者： Martyushev, Dmitriy A. Govindarajan, Suresh Kumar Department of Oil and Gas Technologies Perm National Research Polytechnic University Perm614990 Russia Petroleum Engineering Programme Department of Ocean Engineering Indian Institute of Technology Madras Chennai India

Well killing remains to be the critical technological stage before proceeding with workover operations. Well killing using Visco-Elastic Gel (VEG) has been found to preserve and reinstate the filtration characteristics of bottom-hole formation zone efficiently. Since, these methods exclude the possibility of penetration of well-killing fluids into the reservoirs, the natural permeability of the reservoir retained. In this article, the authors have reported for the first time about a new VEG with controlled fracture times that remains appropriate for killing oil wells associated with both terrigenous carbonate reservoir operations. A distinctive feature of the proposed technology using a VEG with adjustable degradation times (can vary from 3 to 120 h) is that it requires a relatively smaller volumes of the composition in comparison with that of the conventional technologies. As a result, a significant reduction in the negative impact on the reservoir is achieved resulting from a relatively low penetrating ability of the proposed VEG. High structural properties of the VEG make it possible to reliably block the overlapped reservoir interval and it excludes the penetration of process fluid into the reservoir. In addition, it also eliminates the flow of formation fluid from the reservoir, which is absolutely necessary for trouble-free repairing work. It was found from the present study that the use of a breaker of a particular, single type does not provide the desired results and in the present study, the authors have deduced a relatively complex breaker based on peroxyhydrate and citric acid with a 1:1 ratio. The introduction of the encapsulated peroxyhydrate at the stage of preparation of the VEG ensures monodispersity of its dispersion characteristics. The developed VEG was successfully tested in 32 wells of oil fields in the Perm Krai fields in Russia. The well killing technology developed and described in this article using a VEG with adjustable destruction times ha

关键词： petroleum reservoir engineering

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The Use of Strychnos Potatorum in an Environmental IoT System for the Treatment of Commercial and Domestic Washing Discharge in Continuous Column Studies 30th

The Use of Strychnos Potatorum in an Environmental IoT Syste...

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Advances in Systems engineering - Proceedings of the 30th International Conference on Systems engineering, ICSEng 2023

作者： Ramalingham, Senthilkumar Prasad, Reddy Kumar, K. Saravana Shanmugam, Thirumurugan Al Toobi, Khalsa Al Yaroubi, Aya Al Jabri, Maryam College of Engineering and Technology University of Technology and Applied Sciences Suhar Oman Petroleum and Chemical Engineering Programme Faculty of Engineering Universiti Teknologi Brunei Bandar Seri Begawan Brunei College of Computing and Information Sciences University of Technology and Applied Sciences Suhar Oman

ISBN: (纸本)9783031405785

Wastewater treatment and access to clean drinking water are major problems in emerging nations. Turbidity is caused by pollutants in the form of colloid particles found in waste water, and the color of waste water is brought on by the existence of naturally occurring mineral ions. The traditional, costly way of removing turbidity and discolored organic matter is coagulation treatment with chemicals. As a result, a different and affordable technique for eliminating turbidity using natural coagulants is suggested. Strychnos potatorum, a plant-based coagulant, is one of the natural coagulants that can be used in wastewater treatment to decrease it, and it is increasingly being used in this capacity. This study work concentrated on removing turbidity from both commercial and household washing machines using Strychnos potatorum seeds by creating an environmental system. Parameters, including pH(6), size (0.25 cm), and dosage (0.6 gm), have been optimized in batch study. The bed height (25 cm) and flow rate (5 ml/min) in the continuous mode of study have been optimized based on optimized parameters in the batch study. Results of FTIR and SEM tests confirmed the removal of turbidity. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Wastewater treatment

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Geological, engineering Geological and Hydrogeological Characteristics of the Knowledge Economic City, Al Madinah Al Munawwarah, KSA

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Geomaterials 2025年第1期15卷 40-55页

作者： Mutasim A. M. Ez Eldin Tareq Saeid Al Zahrani Gabel Zamil Al-Barakati Ibrahim Mohamed AlHarthi Marwan Mohamed Al Saikhan Waleed Abdel Aziz Al Aklouk Waheed Mohamed Saeid Ba Amer Programme of Engineering Geology Center of Applied Geology Saudi Geological Survey Jeddah Kingdom of Saudi Arabia Department of Engineering Geology College of Petroleum Geology and Minerals University of Bahri Khartoum Sudan Zamzam Studies and Research Center Saudi Geological Survey Jeddah Kingdom of Saudi Arabia

The Knowledge Economic City (KEC) of Al Madinah Al Munawwarah is one of the major projects and represents the cornerstone for the new development activities for Al Madinah. The study area contains different geological units dominated by basalt and overlain by surface deposits. The surface soils vary in thickness and can be classified into well-graded SAND with silt and gravel (SW-SM), silty SAND with gravel (SM), silty GRAVEL with sand (GM), and sandy SILTY clay (CL-ML). The subsurface soil obtained from the drilled boreholes can be classified into poorly graded GRAVEL (GP), well-graded GRAVEL with sand (GW), poorly graded GRAVEL with silt (GP-GM), silty CLAYEY gravel with sand (GC-GM), silty SAND with gravel (SM), silt with SAND (ML), and silty CLAY with sand (CL-ML), sandy lean CLAY (CL), and lean CLAY (CL). The relative density of the deposit and the different gravel sizes intercalated with the soil influenced the Standard Penetration Test (SPT) values. The SPT N values are high and approach refusal even at shallow depths. The shallow refusal depth (0.10 to 0.90 m) of the Dynamic Cone Penetration Test (DCPT) was observed. Generally, the soil can be described as inactive with low plasticity and dense to very dense consistency. The basalt of the KEC site is characterized by slightly (W2) to highly (W4) weathering, their strength ranges from moderate (S4) to very strong (S2), and the Rock Quality Designation (RQD) ranges from very poor (R5) to excellent (R1). The engineering geological map of the KEC characterized the geoengineering properties of the soil and rock materials and classified them into many zones. The high sulphate (SO42−) and chloride (Cl−) contents in groundwater call for protective measures for foundation concrete. The current study revealed that geohazard(s) mitigation measures concerning floods, volcanic eruptions, and earthquakes should be considered.

关键词： engineering Geology Knowledge Economic City Petrographic Description Rock and Soil Investigations

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Correction: Water-Weakening Effects on the Failure Behavior of Mudstones

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Rock Mechanics and Rock engineering 2023年第12期56卷 9187-9188页

作者： Iyare, U. C. Blake, O. O. Frash, L. P. Carey, J. W. Jones, Dahlia Ramjarrie, Kerneese Los Alamos National Laboratory Los Alamos USA Petroleum Geoscience Programme Department of Chemical Engineering University of the West Indies St. Augustine Trinidad and Tobago

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Laboratory-based assessment of geotechnical characteristics of organic waste-amended soil for landfill biocover

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Environmental Science and Pollution Research 2024年第58期31卷 66029-66043页

作者： Rahim, Suaidah Isa, Mohamed Hasnain Shams, Shahriar Jeludin, Muneerah Abdul Rahman, Ena Kartina Hj Md Juani, Rozeana Ul Mustafa, Muhammad Raza Abd Manan, Teh Sabariah Jagaba, Ahmad Hussaini Civil Engineering Programme Area Universiti Teknologi Brunei Tungku Highway GadongBE1410 Brunei Department of Civil & Environmental Engineering Universiti Teknologi PETRONAS Perak Darul Ridzuan Seri Iskandar32610 Malaysia Centre for Urban Resource Sustainability Institute of Self-Sustainable Building Universiti Teknologi PETRONAS Perak Seri Iskandar32610 Malaysia Institute of Tropical Biodiversity and Sustainable Development Universiti Malaysia Terengganu Kuala Nerus Terengganu Darul Iman21030 Malaysia Interdisciplinary Research Centre for Membranes and Water Security King Fahd University of Petroleum and Minerals Dhahran31261 Saudi Arabia

A landfill biocover is essential for addressing environmental concerns, especially in waste management, as it plays a crucial role in mitigating the release of methane gas. This study investigates the geotechnical characteristics of soil amended with organic wastes for landfill biocover applications. Various organic waste amendments, viz., rice husk, crushed coconut coir, and compost, were examined at different percentages (0%, 25%, 50%, and 75%) compared with conventional landfill cover material, i.e. natural clay, as biocovers. Laboratory experiments analysed geotechnical characteristics, including organic content, Atterberg limit, compaction, consolidation, and desiccation cracking. The study revealed that organic waste amendment significantly impacted the geotechnical characteristics of landfill biocover, enhancing organic content and porosity and reducing permeability and desiccation susceptibility. Soils amended with organic content support methanotrophic bacteria growth and reduce methane emissions in landfills. The most promising biocovers were identified as 75CR (crushed coconut coir/wastewater sludge/clay in percentage ratio of 70:5:25), followed by 75CT (compost/wastewater sludge/clay in percentage ratio of 70:5:25), and 25RH (rice husk/wastewater sludge/clay in percentage ratio of 20:5:75). Biocovers offer sustainable landfill alternatives, underscoring the need to understand their geotechnical characteristics for successful installation in landfills. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Composting

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Enhanced oil recovery by spontaneous imbibition of nanofluid assisted low saline alkali polymer in sandstone reservoir

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Journal of Molecular Liquids 2025年 428卷

作者： Seetharaman, Gomathi Rajalakshmi Devakumar, N.P. Deshmukh, Minal Sangwai, Jitendra S. Enhanced Oil Recovery Laboratory Petroleum Engineering Programme Department of Ocean Engineering Indian Institute of Technology Madras Chennai600 036 India Department of Chemical Engineering Indian Institute of Technology Madras Chennai600 036 India Center of Excellence on Subsurface Mechanics and Geo-Energy Indian Institute of Technology Madras Chennai600 036 India Maharashtra Pune411038 India

Spontaneous imbibition plays a crucial role in enhanced oil recovery (EOR). In this work, the synergistic effect of low salinity water, alkali, polymer, and nanoparticles was explored as a potential oil recovery agent for low acid number crude oil in a sandstone reservoir. Silica nanoparticles (15 nm) at various concentrations (100–1000 ppm) were dispersed in low salinity water (lowsal) containing sodium carbonate (alkali) and polyacrylamide (PAM, polymer), referred to as low saline-alkali-polymer-nanofluid (LSAP-NFs). Interfacial tension (IFT) and contact angle measurements were performed at 50 °C to understand the impact of LSAP-NFs on EOR through spontaneous imbibition. The results showed that the larger molecular size of the polymer hindered the effect of alkali in reducing the IFT and altering the wettability. The imbibition efficiency of the LSAP-NFs was evaluated using an Amott cell at 50 °C with Berea sandstone core samples. The spontaneous imbibition results showed that the imbibition effectiveness of the LSAP-NFs was higher than that of simple alkali, LSAW, and LSAP flooding agents. The prominent mechanism of imbibition was studied by analyzing the solid–liquid interfacial force using F-D mode from Atomic Force Microscope (AFM) investigations. The interfacial mechanisms, including IFT, wettability, surface roughness, and solid–liquid interfacial forces, confirmed that the imbibition process is equally controlled by gravity and capillary forces. Further, the solid–liquid interfacial force exposed a fully hydrophilic surface with silica nanofluid, confirming that capillary force dominates imbibition. This work identifies the fundamental mechanism by which spontaneous imbibition impacts enhanced oil recovery. © 2025 Elsevier B.V.

关键词： Sandstone

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Modeling and simulation of the“IL-36 cytokine”and CAR-T cells interplay in cancer onset

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International Journal of Modeling, Simulation, and Scientific Computing 2022年第3期13卷 207-222页

作者： Khaled A.A-Utaibi Alessandro Nutini Ayesha Sohail Robia Arif Sumeyye Tunc Sadiq M.Sait Computer Science and Software Engineering Department University of Ha’il Ha’ilSaudi Arabia Biology and Biomechanics Department Centro Studi Attivita Motorie via di Tiglio 94 LuccaItaly Department of Mathematics Comsats University Islamabad Lahore 54000Pakistan Vocational School of Sciences Physiotherapy Programme Medipol University UnkapanıAtat¨urk BulvarıNo.27Halic Campus34083 FatihIstanbulTurkey Center for Communications and IT Research Research Institute King Fahd University of Petroleum&Minerals Dhahran 31261Saudi Arabia

Background:CAR-T cells are chimeric antigen receptor(CAR)-T cells;they are targetspecific engineered cells on tumor cells and produce T cell-mediated antitumor ***-T cell therapy is the“first-line”therapy in immunotherapy for the treatment of highly clonal neoplasms such as lymphoma and *** adoptive therapy is currently being studied and tested even in the case of solid tumors such as osteosarcoma since,precisely for this type of tumor,the use of immune checkpoint inhibitors remained *** CAR-T is a promising therapeutic technique,there are therapeutic limits linked to the persistence of these cells and to the tumor’s immune ***-T cell engineering techniques are allowed to express interleukin IL-36,and seem to be much more efficient in antitumoral ***-36 is involved in the long-term antitumor action,allowing CAR-T cells to be more efficient in their antitumor action due to a“cross-talk”action between the“IL-36/dendritic cells”axis and the adaptive ***:This analysis makes the model useful for evaluating cell dynamics in the case of tumor relapses or specific understanding of the action of CAR-T cells in certain types of *** model proposed here seeks to quantify the action and interaction between the three fundamental elements of this antitumor activity induced by this type of adoptive immunotherapy:IL-36,“armored”CAR-T cells(i.e.,engineered to produce IL-36)and the tumor cell population,focusing exclusively on the action of this interleukin and on the antitumor consequences of the so modified CAR-T *** model was developed and numerical simulations were carried out during this *** development of the model with stability analysis by conditions of Routh–Hurwitz shows how IL-36 makes CAR-T cells more efficient and persistent over time and more effective in the antitumoral treatment,making therapy more effective against the“solid tumor”.Findings:Primary malignant bone tumors are

关键词： IL-36 bone remodeling mathematical model BMUs CAR-T cells

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