Article
Chemistry, Physical
Sesegma Ts. Khankhasaeva, Sayana V. Badmaeva, Marina V. Ukhinova
Summary: The adsorption of diclofenac (DCF), a common pharmaceutical pollutant, on Fe2O3-pillared montmorillonites (Fe-PMts) was studied. Fe-PMts were synthesized by intercalation of natural montmorillonite with iron polyoxocations. The pillaring process significantly increased the specific surface area and sorption capacity of the clay. The pH, sorbent content, DCF concentration, and temperature were found to be the main factors affecting DCF adsorption. The kinetic data and adsorption isotherm were analyzed using various models, and the results showed that the adsorption followed pseudo-second order kinetics and Langmuir isotherm. The thermodynamic parameters indicated that the adsorption of DCF on Fe-PMt was spontaneous and exothermic. Fe-PMt was proven to be an effective and environmentally friendly sorbent for DCF removal in pharmaceutical wastewater treatment.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Hedi Jedli, M. M. Almoneef, Mohamed Mbarek, Abdessalem Jbara, Khalifa Slimi
Summary: The aim of this research is to evaluate the adsorption isotherms and kinetics of CO2 on zeolite ZSM-5. The Langmuir model provided the best fit for CO2 adsorption, indicating that it is a spontaneous and exothermic process. The kinetics of CO2 adsorption on the adsorbent were found to be influenced by temperature and pressure. The results can be utilized in CO2 separation and adsorption system performance evaluation.
Article
Chemistry, Applied
Milena Obradovic, Aleksandra Dakovic, Danijela Smiljanic, Milica Ozegovic, Marija Markovic, George E. Rottinghaus, Jugoslav Krstic
Summary: Cationic surfactant ODMBA modified minerals, including organobentonite, organokaolin, and organozeolite, were studied as adsorbents for the removal of non-steroidal anti-inflammatory drugs IBU and DS. The results showed that organobentonite had the highest adsorption capacity, while organokaolin and organozeolite had lower capacities. The adsorption mechanism involved hydrophobic interactions, electrostatic interactions, and anion exchange.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Mohamed A. Habila, Zied A. ALOthman, Monerah R. ALOthman, Mohammed Salah El-Din Hassouna
Summary: In this study, carbon from palm waste was modified with an ionic liquid and evaluated for the adsorption of benzothiophene. The modified carbon showed higher adsorption capacity compared to the raw carbon. The kinetics and isotherm models indicated that the second-order kinetic model and the Freundlich model were suitable for describing the adsorption process. The prepared adsorbents showed promising results for up to five cycles of regeneration and reuse.
Article
Chemistry, Physical
Tariq A. Altalhi, Mohamed M. Ibrahim, Gaber A. M. Mersal, M. H. H. Mahmoud, Tushar Kumeria, Mohamed G. El-Desouky, Ashraf A. El-Bindary, Mohamed A. El-Bindary
Summary: In this study, mango seeds activated carbon (MSAC) nanoparticles were prepared with high biocompatibility for potential use as drug carriers. The experimental results showed that the nanocomposite significantly enhanced the adsorption performance of the anti-cancer drug DOX, indicating its potential in drug delivery applications.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Green & Sustainable Science & Technology
Rooma Waqar, Muhammad Kaleem, Javed Iqbal, Lubna Anjum Minhas, Muhammad Haris, Wadie Chalgham, Ajaz Ahmad, Abdul Samad Mumtaz
Summary: This study investigated the use of Scenedesmus sp. as an adsorbent to remove lead and cadmium from a metal solution. The effects of various factors on the adsorption process were examined, and the ideal conditions for each metal were determined. The biosorption process was quick, with high removal percentages. The biosorption capacities and desorption rates were determined, and the functional groups and morphological changes on the adsorbent surface were analyzed. Scenedesmus sp. showed great potential as an alternative sorbent for heavy-metal-contaminated wastewater treatment.
Article
Multidisciplinary Sciences
Edwin Andrew Ofudje, Ezekiel F. Sodiya, Olajire S. Olanrele, Fatai Akinwunmi
Summary: This study investigated the use of chemically synthesized apatite (CHAp) powder as an adsorbent for removing Cd2+ from water. The effects of time, initial Cd2+ concentration, amount of CHAp, temperature, and solution pH on the adsorption process were studied. Various analytical techniques were used to analyze the synthesized hydroxyapatite (HAp) powder and confirm its adsorption capacity. The results showed that CHAp performed well as an adsorbent for Cd2+ and could be used in bioremediation applications.
Article
Materials Science, Paper & Wood
Gazi Md Salah Uddin, Soma Saha, Subarna Karmaker, Tapan Kumar Saha
Summary: The study investigated the kinetic behavior of cefixime trihydrate removal from aqueous solution using the efficient and biodegradable adsorbent chitosan 10B. The adsorption process of cefixime onto chitosan 10B followed a pseudo-second-order kinetic model, with the Langmuir model providing the best illustration of the adsorption equilibrium. Experimental results confirmed that the adsorption of cefixime onto chitosan 10B in aqueous medium is an exothermic physisorption process.
CELLULOSE CHEMISTRY AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Shamsuddeen A. Haladu
Summary: This study reports the synthesis of a cross-linked cycloterpolymer with pH-responsive and zwitterionic-anionic properties, which exhibited excellent adsorption capacity and removal efficiency for Malachite green dye, making it suitable for industrial use in the treatment of dye-polluted water.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Zhenjian Liu, Chao Pu, Xidong Du, Hong Yin, Yugang Cheng
Summary: The combined effects of surface chemistry and pore structure on water vapor adsorption characteristics of coal were studied. The results showed that water vapor adsorption depends on surface chemistry but not pore structure. The monolayer adsorption capacity decreases with increasing coal rank. The diffusion coefficient also decreases with coal rank, and the diffusion activation energy for high-volatile bituminous is higher than the other coals.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Ghaferah H. Al-Hazmi, Moamen S. Refat, Ahmed Shahat
Summary: In this study, a high alumina content (Si/Al=1.5) high order aluminosilica monolith (HOASM) composite was successfully fabricated using a reproducible and simple one-pot synthesis strategy. The geometry of the HOASM composite was controlled using microemulsion phases of copolymer P123 as soft templates. The pore structures of the composite were characterized, and the presence of aluminum species in the silica pore structure significantly influenced the acidity of the nanoadsorbent. The HOASM composite was used to remove Crystal violet (CV) dye from wastewater, and the multi-directional pores and mesostructural geometries of the adsorbent were found to improve the coverage of CV dye on the composite surfaces. The performance factors such as temperature, adsorbent dose, concentration, pH, and contact period were investigated, and it was determined that the optimal pH for CV dye adsorption on HOASM composite was 8. The adsorption isotherm followed the Langmuir model, and the kinetics followed a pseudo-second-order model. Thermodynamic experiments showed that the CV dye adsorption on the HOASM composite was endothermic and spontaneous.
Article
Engineering, Environmental
Pramod Kumbhar, Dattatray Narale, Rakhee Bhosale, Chitra Jambhale, Jin-Hyeok Kim, Sanjay Kolekar
Summary: This study reports the synthesis and application of tea waste/Fe3O4 magnetic composite for the adsorption of crystal violet dye from aqueous solution. The composite showed high efficiency and adsorption capacity for the removal of CV dye. The adsorption process was found to be spontaneous and heat releasing.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Oumaya Issaoui, Hedi Ben Amor, Laurence Pirault-Roy
Summary: In this study, a highly efficient organoclay HMD was successfully prepared for the removal of diuron from aqueous solution. The HMD exhibited excellent adsorption performance, making it an effective adsorbent for the elimination of diuron in water.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Environmental Sciences
Ebrahim Allahkarami, Amirreza Azadmehr, Fahimeh Noroozi, Shayan Farrokhi, Mika Sillanpaa
Summary: This research aimed to develop a low-cost adsorbent for the removal of nitrate ion from aqueous solutions. The composite material was characterized and the influential variables on nitrate adsorption were studied. Fixed-bed column experiments were conducted and the results were successfully explained using different models.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Applied
Fatima Saleem, Haq Nawaz Bhatti, Amina Khan, Lamia Ben Farhat, Zainab Mufarreh Elqahtani, Norah Alwadai, Munawar Iqbal
Summary: In this study, a composite material consisting of polypyrrole and magnetic particles was prepared using tea waste as a starting material. The composite material showed promising adsorption capacity for the removal of PO43- ions from water and followed pseudo-second order kinetics and the Langmuir isotherm model.
ADSORPTION SCIENCE & TECHNOLOGY
(2022)
