Article
Chemistry, Physical
Mehdi Rouhani, Seyed Davoud Ashrafi, Kamran Taghavi, Mohammad Naimi Joubani, Jalil Jaafari
Summary: In this study, Fe3O4/Clinoptilolite nanocomposite was synthesized as a magnetic nanosorbent and used for the adsorption of tetracycline from aqueous solution. The results showed that Fe3O4/Clinoptilolite nanocomposite had a high adsorption capacity and removal efficiency, and was reusable.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Multidisciplinary
Amir Hossein Salimi, Ali Shamshiri, Ehsan Jaberi, Hossein Bonakdari, Azam Akhbari, Robert Delatolla, Mohammad Reza Hassanvand, Mohammad Agharazi, Yuk Feng Huang, Ali Najah Ahmed, Ahmed Elshafie
Summary: Nanotechnologies show promise in the production of potable water from natural sources through treatment. This study examines a simple method for preparing and modifying natural adsorbents using different acids and bases, with convenient desorption. Characterization techniques such as XRD, FT-IR, SEM, and TEM are used, along with the Response Surface Method to analyze the influence of operational variables. The results show optimal conditions for iron removal and the best isothermal model to describe the adsorption process.
AIN SHAMS ENGINEERING JOURNAL
(2022)
Review
Environmental Sciences
Lisbania Velarde, Mohammad Sadegh Nabavi, Edwin Escalera, Marta-Lena Antti, Farid Akhtar
Summary: Water pollution is a global issue that threatens human health, particularly the safe supply of drinking water. Natural zeolites have shown promise in effectively removing heavy metals from contaminated water sources. This review examines the application of different natural zeolites for removing heavy metals such as arsenic, cadmium, chromium, lead, mercury, and nickel. Various chemical modifications of natural zeolites, as well as their sorption capacities and properties, are analyzed and compared. Clinoptilolite, in particular, is the most commonly used natural zeolite for heavy metal removal, demonstrating effectiveness against a range of heavy metals.
Article
Environmental Sciences
Thaisa Frossard Coslop, Ramiro Picoli Nippes, Rosangela Bergamasco, Mara Heloisa Neves Olsen Scaliante
Summary: Diazepam has been detected in water sources globally, impacting the quality of drinking water, prompting the search for effective removal methods. Using natural clinoptilolite zeolite as an adsorbent offers a cheap and eco-friendly solution to remove this drug from water. Experimental results demonstrate the significant potential of zeolite for adsorbing diazepam in water.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Yi Liu, Shuanghui Zhao, Xiumei Qiu, Yi Meng, Hongquan Wang, Sen Zhou, Qiancheng Qiao, Chunjie Yan
Summary: This study demonstrates a simple method to prepare clinoptilolite-based zeolite-geopolymer foams. The obtained material possesses micropores of zeolite and meso/macropores of geopolymer matrix, and shows good static sorption performance for toxic heavy metals. The adsorption amounts for Cr3+, Pb2+, Ni2+, Cu2+, and Cd2+ are 6.21 mg/g, 6.11-6.13 mg/g, 5.92-6.07 mg/g, 5.53-5.93 mg/g, and 5.44-5.79 mg/g, respectively.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Barbara Kalebic, Nikola Skoro, Janez Kovac, Nevenka Rajic
Summary: This study investigated the regeneration of ciprofloxacin-containing clinoptilolite using non-thermal plasma treatment. The optimal parameters for plasma treatment were determined, and the results showed that the adsorption capacity of the natural clinoptilolite can be regenerated to at least 90% of its initial capacity.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Dominika Fila, Zbigniew Hubicki, Dorota Kolodynska
Summary: This study demonstrates a viable approach to increase the recovery potential of critical materials through biosorption. Environmentally friendly biosorbents were prepared and their adsorption performance and regeneration ability were investigated.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Fadya. M. Nasief, Mohamed Shaban, Khalid A. Alamry, Mostafa R. Abu Khadra, Aftab Aslam Parwaz Khan, Abdullah M. Asiri, H. M. Abd El-Salam
Summary: The research indicates that increasing activation time significantly enhances the adsorption capacity of natural zeolite, and synthetic zeolite along with activated natural zeolite show high efficiency in the removal of Ca/Mg total hardness. The adsorption process follows different kinetic models for synthetic zeolite and mechanically activated clinoptilolite, indicating their distinct adsorption mechanisms.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Nooshin Mortazavi, Mehrnaz Bahadori, Afsaneh Marandi, Shahram Tangestaninejad, Majid Moghadam, Valiollah Mirkhani, Iraj Mohammadpoor-Baltork
Summary: The modification of natural zeolite clinoptilolite through simple methods significantly enhances its CO2 adsorption capacity. Different modifiers, including cation exchange, amine modification, and ionic liquid modification, were found to improve CO2 adsorption, with clinoptilolite/Li+, clinoptilolite/2% MEA, and clinoptilolite/5% [bmim]PF6 showing the highest enhancements at 4 bar CO2 pressure.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2021)
Article
Environmental Sciences
Zeinab Ahmadnezhad, Abdorreza Vaezihir, Christoph Schueth, Gholamreza Zarrini
Summary: Adsorption and bioremediation processes have been studied for the remediation of BTE through PRBs. The combination of natural zeolite and bacterial strains in a PRB system showed efficient removal of BTE mixture, indicating the potential for field-scale application. This research highlights the high efficiency of C-HZ in BTE treatment and the improved remediation efficiency of CH-Z ePRB method in restricting BTE migration.
Article
Biotechnology & Applied Microbiology
Paula Valeria Viotti, Wardleison Martins Moreira, Henrique Straioto, Rosangela Bergamasco, Mara Heloisa Neves Olsen Scaliante, Marcelo Fernandes Vieira
Summary: This study investigates the modification of natural zeolite to enhance its ability to remove drugs and pesticides from water. The hydrothermal treatment with surfactant (CTAB) results in a structural rearrangement of the zeolite, making it more hydrophobic with a smaller specific area and a higher porosity. The modified zeolite exhibits significantly increased removal of the evaluated contaminants. The study concludes that hydrothermal modification with CTAB is a promising technique for using natural zeolites in the removal of emerging contaminants.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Environmental Sciences
Ana Paula Jambers Scandelai, Jaqueline Pirao Zotesso, Jean Cesar Marinozi Vicentini, Lucio Cardozo Filho, Celia Regina Granhen Tavares
Summary: The study investigated a system composed of ScWO and ion exchange using zeolite for treating leachates, resulting in significant improvements in removing contaminants. Further research is needed to understand the complex characteristics of leachates for compliance with regulations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Mohammad Nakhaei, Mohammad Hassan Heidarian, Vahid Vatanpour, Khalil Rezaei
Summary: The clinoptilolite zeolite has been tested for its ability to remove lead from polluted groundwater in water wells. Batch and fixed-bed column experiments were conducted to assess its performance. The results showed that the highest lead removal efficiency was achieved at pH = 6 and 298 K within 90 minutes. The Freundlich model accurately predicted the adsorption behavior, and the pseudo-second order equation was the best-fitting kinetic model for clinoptilolite. Column experiments indicated that a flow rate of 1 mL/min, a bed height of 10 cm, and a grain size of 0.6 to 0.8 mm resulted in the highest removal efficiency. The Thomas and Yoon-Nelson models accurately predicted the breakthrough curves.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Maryam Noori, Maryam Tahmasebpoor, Rauf Foroutan
Summary: The study prepared Clinoptilolite/Fe3O4 (Clin/Fe3O4) nanocomposite powders and Alginate/Clinoptilolite/Fe3O4 (Alg/Clin/Fe3O4) nanocomposite beads for methylene blue (MB) cationic dye removal. The synthesized adsorbents were characterized and showed high efficiency in MB dye removal, exceeding 90%. The adsorption process followed the Langmuir isotherm model, with a monolayer adsorption capacity determined for each adsorbent. The kinetic data indicated a pseudo-second order (PSO) kinetic model and the thermodynamic results showed that the adsorption process was exothermic and spontaneous, with regeneration experiments demonstrating good potential for reuse.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Green & Sustainable Science & Technology
P. Saez, A. Rodriguez, J. M. Gomez, C. Paramio, C. Fraile, E. Diez
Summary: The high affinity of clinoptilolite for gallium suggests potential for selective tests. The particle size was found to have an impact on adsorption kinetics in fixed-bed experiments.
JOURNAL OF SUSTAINABLE METALLURGY
(2021)