Article
Environmental Sciences
Ifrah Javed, Muhammad Asif Hanif, Umer Rashid, Farwa Nadeem, Fahad A. Alharthi, Elham Ahmed Kazerooni
Summary: The combination of adsorption process and electrocoagulation is an effective technique for dye removal. In this study, calcinized and non-calcinized composites based on bentonite and sodium zeolite were prepared and tested for the adsorptive removal of different dyes. Factors such as contact time, initial dye concentration, and temperature were investigated. The results showed that the calcinized nano-composite material had better adsorption capacity and could be used as a low-cost alternative for dye removal.
Article
Biochemistry & Molecular Biology
Hemant Mittal, Ali Al Alili, Pranay P. Morajkar, Saeed M. Alhassan
Summary: The study synthesized graphene oxide crosslinked nanocomposites hydrogels of chitosan and carboxymethyl cellulose as versatile adsorbents for both cationic and anionic dyes contaminated wastewater. The adsorption process was well explained using pseudo-second-order and Langmuir models, with excellent regeneration capacity demonstrated for continuous cycles of adsorption-desorption. The synthesized CS/CMC-NCH showed great potential for effective treatment of dye-contaminated wastewater.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Review
Chemistry, Multidisciplinary
Mohammed Benjelloun, Youssef Miyah, Gulsun Akdemir Evrendilek, Farid Zerrouq, Sanae Lairini
Summary: The increased environmental awareness and tighter regulatory standards have led various industries to seek appropriate wastewater treatment technologies for colored wastewater. This review provides detailed information on dyes, their classification, the environmental impact of water pollution, and the use of adsorption technology as a sustainable solution for dye removal. Studies evaluating the effectiveness of different adsorbents, particularly low-cost ones, in removing dyes from aqueous solutions are highlighted.
ARABIAN JOURNAL OF CHEMISTRY
(2021)
Review
Environmental Sciences
Avik Kumar Dhar, Humayra Akhter Himu, Maitry Bhattacharjee, Md Golam Mostufa, Fahmida Parvin
Summary: In recent decades, the release of pollutants into aquatic systems from increased industrial, agricultural, and domestic activities has created a need for reliable and environmentally friendly methods of removal. Bentonite clays have emerged as a cost-effective and sustainable solution in wastewater treatment, offering superior properties such as high adsorption capacity and chemical stability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Saswati Ray, Anil Kumar Mishra, Ajay S. Kalamdhad
Summary: The study evaluates the effects of varying Zn2+ concentrations on the surface morphology, hydraulic properties, and sorption capacity of two Indian bentonites. The Langmuir isotherm and Pseudo-second order kinetic models were found to be the best fit for both bentonites. Bentonites with high cation exchange potential, swelling behavior, and specific surface area displayed higher removal and adsorption capacity at higher Zn2+ concentrations.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Maria Eduarda Barbosa Araujo, Vanderlane Cavalcanti Silva, Jucielle Veras Fernandes, Juliana Melo Cartaxo, Alisson Mendes Rodrigues, Romualdo Rodrigues Menezes, Gelmires de Araujo Neves
Summary: This study evaluated waste rock from bentonite mining as potential adsorbents for removing cationic dyes from contaminated water. The waste samples were characterized and their adsorption efficiency was investigated. Sample AM02 showed the best adsorptive performance for both dyes, with removal rates higher than 90%. The adsorption process was predominantly endothermic and spontaneous. Waste rock samples proved to be promising candidates for removing cationic dyes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
Abd Allah Rahimi, Farzaneh Alihosseini
Summary: This study successfully combined background adsorption using cheap materials with hybrid pigment production processes, utilizing wastewater sludge as a printing pigment and obtaining satisfactory results.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Farishta Shafiq, Chenyu Liu, Hengjun Zhou, Hailiang Chen, Simiao Yu, Weihong Qiao
Summary: In this study, controlled hollow mesoporous hydroxyapatite (HM-HAP) particles were successfully prepared and their excellent adsorption performance was verified through dye adsorption experiments.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Multidisciplinary Sciences
Ali H. Jawad, Shihab Ezzuldin M. Saber, Ahmed Saud Abdulhameed, Ahlam M. Farhan, Zeid A. ALOthman, Lee D. Wilson
Summary: This research aimed to use natural Iraqi bentonite clay (NIBC) to adsorb the organic dye (methylene blue, MB) from aqueous media. Analytical methods were performed to analyze the physicochemical characteristics of NIBC. The study examined the impacts of adsorbent dosage, pH, and initial concentrations on the removal of MB. Results showed that NIBC had a maximum adsorption capacity of 256 mg/g for MB.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2023)
Review
Polymer Science
Vipin Malik, Laishram Saya, Drashya Gautam, Shallu Sachdeva, Neelu Dheer, Dinesh Kumar Arya, Geetu Gambhir, Sunita Hooda
Summary: This review focuses on the efficiency of tamarind-based nanocomposites as potential adsorbents for various harmful organic and inorganic water pollutants. It provides a comprehensive analysis of the fabrication routes, adsorption isotherms, kinetic and thermodynamic modeling, as well as the adsorption mechanism and recyclability of these adsorbents. Factors affecting the adsorption behavior and a comparison with other nanomaterials are also discussed. Based on the literature surveyed, there is great potential for future research on tamarind-based nanocomposites as low-cost biomaterials in water purification.
Article
Environmental Sciences
M. T. Amin, A. A. Alazba, M. Shafiq
Summary: This study investigated the efficiency of NiFe-layered double hydroxide (LDH), functionalized bentonite clay (F-bentonite), and their composites as adsorbents for removing lead ions (Pb2+) in aqueous solutions. The results showed that the equilibrium contact time was 60 minutes with a maximum removal efficiency of nearly 99%. The maximum adsorption capacity of 151 mg g(-1) was observed when using the composite adsorbent of LDH and functionalized bentonite. The best-fit models for the adsorption process suggested monolayer adsorption, physical adsorption, and chemisorption as controlling mechanisms.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Environmental Sciences
Najeeb Ur Rahman, Ihsan Ullah, Sultan Alam, Muhammad Sufaid Khan, Luqman Ali Shah, Ivar Zekker, Juris Burlakovs, Anna Kallistova, Nikolai Pimenov, Zane Vincevica-Gaile, Yahya Jani, Mohammad Zahoor
Summary: The study showed that chemically activated Ailanthus altissima sawdust can be used as a suitable adsorbent for removing harmful substances, especially dyes, from polluted waters. The Freundlich model and pseudo second-order kinetic model were found to be the most suitable for calculating adsorption parameters.
Article
Chemistry, Multidisciplinary
Eman A. Alabbad
Summary: Developing countries are facing the harmful effects of industrial effluents, particularly dyes that pollute water systems. This study successfully demonstrated the use of nano bentonite for extracting Direct Yellow Fifty (DY50), an organic contaminant that can impact water quality. The prepared nanoparticles were characterized using SEM, XRD, and FTIR. The study analyzed the influence of various operating conditions, such as pH, dosage, temperature, contact time, and initial DY50 concentrations. The results showed that nano bentonite adsorbed approximately 94% of DY50 at an initial concentration of 40 mg/L. The optimal removal conditions were observed at an acidic pH of 3 with a sorbent dosage of 0.05 g, a contact time of 4 hours, and a temperature of 30 degrees C. The study also investigated the adsorption isotherm, kinetic analysis, and thermodynamic behavior, revealing chemisorption interactions and exothermic reactions. In conclusion, this study strongly recommends the use of nano bentonite for the removal of DY50 from aqueous solutions.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Vartika Srivastava, Abhay Kumar Choubey
Summary: A novel type of polymer beads, CS/CuO nanocomposite beads, were prepared by incorporating CuO nanoparticles into chitosan beads, showing enhanced efficiency in removing organic dyes from aqueous solutions. The adsorption process followed pseudo first order kinetics and the equilibrium could be related to the Freundlich model. The nanocomposite beads displayed 100% recovery rate and could be reused up to 5 cycles.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Review
Environmental Sciences
N. Nirmala, V Shriniti, K. Aasresha, J. Arun, K. P. Gopinath, S. S. Dawn, A. Sheeladevi, P. Priyadharsini, Kathirvel Birindhadevi, Nguyen Thuy Lan Chi, Arivalagan Pugazhendhi
Summary: Access to clean water has reduced in recent years due to pollution and man-made activities. The adsorption method has advantages in wastewater treatment. Graphene-based adsorbents can adsorb and catalyze reactions simultaneously. Graphene aerogels are effective in removing heavy metals and dyes. Graphene composites have mesoporous and microporous structures with good adsorption efficiency.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
Xu Yang, Jieshi Xiao, Jian Huang, Kaixiang Peng
Summary: This study introduces an online convolutional adversarial autoencoder (AAE) model to learn representative industrial process information. By extracting features that reflect diverse information and follow a Gaussian distribution, the model improves the accuracy of fault detection and removes redundant information through a feature selection strategy.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
Article
Engineering, Chemical
Shao-Yang Wu, Meng-Tsun Lai, Chung-Hui Hsu, Kevin C. W. Wu, Yesong Gu
Summary: This study investigated the effectiveness of using Fe-based MOF or MIL-100(Fe) in conjunction with a PEDOT-modified Pt electrode for detecting the synthetic azo dye tartrazine. By modifying the electrode with two different methods, favorable lower reductive potentials, competitive sensitivities, and good repeatability and stability were achieved in all MIL-100(Fe)/PEDOT/Pt electrodes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
