Article
Biotechnology & Applied Microbiology
Begum Belat, Sevil Veli, Melike Isgoren
Summary: This study investigates the removal of Linear Alkyl Benzene Sulphonic Acid synthetic solution using a fixed-bed adsorption column system embedded with a composite of polyaniline-supported activated walnut shell. The results show that this adsorbent has a high potential for detergent and COD adsorption from anionic aqueous solutions, making it a good alternative for pretreatment.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Water Resources
Odunola B. Omitola, Matthew N. Abonyi, Kovo G. Akpomie, Folasegun A. Dawodu
Summary: This study investigated the removal of amoxicillin from aqueous solution using a fixed-bed column with silver nano-based adsorbents. Results showed that the silver nanoparticles-maize leaf composite exhibited good adsorption performance, with the best conditions being lower concentration, higher bed height, and flow rate.
APPLIED WATER SCIENCE
(2022)
Article
Environmental Sciences
Zubaida Daudzai, Rujira Dolphen, Paitip Thiravetyan
Summary: This study investigated the use of calcined Meretrix lusoria powder for efficient adsorption of PO43- and NO3-. The results showed that in a fixed bed adsorption column, M. lusoria F800 beads were able to effectively remove PO43- and NO3-. The study also examined the effect of operational parameters on adsorption performance and confirmed the correlation between experimental data and adsorption capacity using the Thomas model. Additionally, the regenerated M. lusoria F800 beads showed continued adsorption capacity.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Water Resources
Jyoti Singh, Santhosh Kumar Kumaresan, Sarvanshi Swaroop, Vishal Mishra
Summary: The present study aims to develop a mathematical model that relates reactor parameters with the breakthrough curve in fixed-bed column adsorption. The effects of operating parameters such as bed height, flow rate, and initial adsorbate concentration on adsorption were investigated using various breakthrough curves. The arbitrary constants of the developed model were found to depend on the operating parameters of the breakthrough kinetics. The proposed model showed excellent results for the referenced data, with a breakthrough curve R-2 greater than 0.98. The model's flexibility allows for easier optimization of the reactor parameters and reduction in the number of complicated experiments needed.
APPLIED WATER SCIENCE
(2023)
Article
Environmental Sciences
Ratnamala Gadigayya Mavinkattimath, Vidya Shetty Kodialbail, Govindan Srinikethan
Summary: The continuous adsorption of RBB dye onto CATRM in a fixed bed column was investigated. Different experimental conditions were tested, and the results showed that lower dye concentration, higher bed height, and lower influent flow rate favored the adsorption efficiency. The maximum adsorption capacity of the CATRM bed was 106 mg/g, and important parameters such as MTZ and LUB were evaluated from the breakthrough curves.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Pummarin Khamdahsag, Dickson Y. S. Yan, Pongnapa Poompang, Nichapa Supannafai, Visanu Tanboonchuy
Summary: Arsenite was effectively removed via oxidation and adsorption in fixed-bed columns using K-OMS2 and Fe-BTC. K-OMS2 showed high efficiency in oxidizing As(III) to As(V) with leached Mn and K concentrations below the groundwater standard. Fe-BTC exhibited good adsorption capacity for As(V) with low Fe leaching and more than 75% removal efficiency. In the combined use of the two columns, over 62% of total As was removed under optimal conditions.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Agricultural Engineering
Uplabdhi Tyagi
Summary: The study highlights the potential of Vetiveria Zizanioides derived biochar for heavy metal removal in multicomponent systems. Biochar efficiency varies with pH, metal ion concentration and residence time. Fixed-bed column testing showed that multicomponent sequence provides more protection against premature exhaustion of biochar.
BIORESOURCE TECHNOLOGY
(2022)
Review
Green & Sustainable Science & Technology
Shanmuk Srinivas Ravuru, Animesh Jana, Sirshendu De
Summary: In this study, nickel aluminium layered double hydroxide (NiAl LDH) was synthesized and impregnated into polysulfone matrix to form mixed matrix beads (MMBs) for the upscaling of adsorptive columns in cyanide effluent treatment. The stability of the impregnated LDH nanoparticles was confirmed, and the adsorption mechanism of cyanide in steel plant effluent was established. A macroscopic transport model was used to predict the adsorption kinetics and simulate the breakthrough behavior of continuous column experiments, leading to the scaling-up of the adsorption columns and the generation of a performance curve.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Metallurgy & Metallurgical Engineering
Mohamed Hadri, Imane El Mrabet, Zincb Chaouki, Khalid Draoui, Mustapha Hamdaoui, Hikmat Douhri, Hicham Zaitan
Summary: The study examined the efficiency of an adsorption process using Moroccan diatomite (ND) as a low-cost adsorbent to remove Congo red (CR) dye from contaminated waters. It investigated the best adsorption conditions, kinetics model, regeneration tests, and continuous adsorption process.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Review
Chemistry, Applied
Anny Leudjo Taka, Michael J. Klink, Xavier Yangkou Mbianda, Eliazer Bobby Naidoo
Summary: The inadequate access to clean water worldwide, especially in Southern Africa, is largely due to pollution by a variety of contaminants. Traditional water treatment methods are facing challenges from new emerging pollutants, necessitating the development of simpler and more cost-effective purification methods using natural polymers like chitosan modified with nanomaterials. Research on functional chitosan-based nanomaterials proves their effectiveness in eliminating environmental pollutants from wastewater.
CARBOHYDRATE POLYMERS
(2021)
Article
Engineering, Environmental
Tobias Reinhardt, Eduard Rott, Philip A. Schneider, Ralf Minke, Harald Schoenberger
Summary: This study found that the introduction of an acidic regeneration step can improve the adsorption performance on GFH when treating real membrane concentrate, achieving 95% adsorption efficiency. However, in alkaline regeneration, desorption performance significantly decreases when the electrical conductivity of NaOH drops below 90 mS/cm. Regularly replacing NaOH can significantly improve desorption performance.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Green & Sustainable Science & Technology
Chao Chen, Zhonglin Chen, Jimin Shen, Jing Kang, Shengxin Zhao, Binyuan Wang, Qian Chen, Xueyan Li
Summary: In this study, a dendrimer-grafted polyacrylonitrile fiber (PANF-TU) was successfully synthesized and characterized for mercury removal. The adsorption feasibility was thoroughly studied through batch and dynamic tests, with a maximum adsorption capacity of 227 mg g-1. The study revealed that PANF-TU exhibited promising adsorption performance and could be a potential material for the remediation of Hg2+ polluted aqueous systems.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Biotechnology & Applied Microbiology
Khaled Al-Zawahreh, Maria Teresa Barral, Yahya Al-Degs, Remigio Paradelo
Summary: Compost from pine bark has shown effective adsorption for different classes of textile dyes. The adsorption capacity was higher for Basic Violet 10 (BV10) than for Direct Blue 151 (DB151) in batch conditions, and competition reduced the uptake of both dyes. Furthermore, the presence of both dyes in solution decreased their affinities in column tests. The column biosorbent could be effectively regenerated using ethanol.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Review
Environmental Sciences
H. Patel
Summary: Adsorption is widely used for pollutant removal due to its potential advantages such as cost-effectiveness and convenience. This study focuses on comparing various adsorption processes and evaluating their adsorption capacity and removal efficiency. It concludes that column adsorption may be more feasible than batch processes.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Mehdi Barzegarzadeh, Mohammad Sadegh Amini-Fazl, Negin Sohrabi
Summary: This study synthesized chitosan-based hydrogel beads with different contents of iron oxide-graphene quantum dots for the ultrasonic-assisted removal of chlorpyrifos from wastewater. The results showed that the chitosan/graphene quantum dot-iron oxide (10) had the highest adsorption efficiency of 99.997%. Furthermore, the study demonstrated that the ultrasonic-assisted removal significantly reduced the equilibration time of chlorpyrifos.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)