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
Biochemistry & Molecular Biology
Adane Woldemedhin Kalsido, Beteley Tekola Meshesha, Beshah M. Behailu, Esayas Alemayehu
Summary: In this study, column adsorption studies on acid-treated Bentonite for fluoride removal indicated an optimized operating condition with 100% removal rate, adsorptive capacity of 2.46 mg/g, and desirability of 1.0. The relationship between experimental and expected response values was analyzed, and variance analysis determined the importance of independent variables and their interactions, ultimately proving the success of acid activation for field application of Bentonite adsorbent.
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
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)
Article
Engineering, Chemical
Mingyan Fu, Bas Heijman, Jan Peter van der Hoek
Summary: Adsorption by granular zeolites and regenerating exhausted zeolites by gaseous ozone is an effective treatment technology for removing organic micropollutants from wastewater. In this study, the zeolite fixed-bed column achieved removal efficiencies between 70% and 100% for eight organic micropollutants, with less favorable removal for two other compounds. Increasing the pre-backwash duration reduced ozone consumption during regeneration.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Chunli Zheng, Yingying Yong, Qiaorui Wang, Zishen Lin, Yujie Wang, Youwen Zhang, Chi He
Summary: In this study, an adsorbent (Hydrogel-I) derived from sodium alginate and modified alkaline lignin (MAL) was evaluated for its adsorption performance of Pb(II)-loaded wastewater. The adsorbent was further assessed by packing it into a fixed-bed column and establishing breakthrough curves under different conditions. The results showed that slower inflow rate, down-inflow mode, lower initial concentration, and higher bed depth favored prolonged breakthrough times and saturation times. The adsorption capacity and removal efficiency were higher under the down-inflow mode compared to the top-inflow mode. Hydrogel-I beads exhibited better adsorption performance than other adsorbents based on rate constant and adsorption capacity. The study also demonstrated the regeneration ability of Hydrogel-I beads and identified the adsorption sites through FT-IR analysis.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Engineering, Environmental
Augusto D. Alvarenga, Rafaela da S. Andre, Kelcilene B. R. Teodoro, Rodrigo Schneider, Luiza A. Mercante, Daniel S. Correa
Summary: This study investigates the use of carbonaceous materials coated on solution blow spun polyamide 6 nanofibrous membranes for efficient methylene blue removal. The results show that the dip coating modification with carbonaceous materials offers competitive adsorption capacity along with a simple, low-cost, and scalable strategy for pollutant removal on a large scale.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Raissa Antonelli, Geoffroy Roger Pointer Malpass, Meuris Gurgel Carlos da Silva, Melissa Gurgel Adeodato Vieira
Summary: This study investigated the adsorption behavior of antibiotic ciprofloxacin in a calcined Verdelodo clay-packed fixed-bed system. The experimental results showed a breakthrough adsorption capacity of 0.038 mmol g(-1) and a mass transfer zone of 4.29 cm. Comparison with ofloxacin adsorption performance and density functional theory computations were also conducted.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Thiago Peixoto de Araujo, Heloise Beatriz Quesada, Debora Federici dos Santos, Beatriz Carvalho da Silva Fonseca, Jessica Zanette Barbieri, Rosangela Bergamasco, Maria Angelica Simoes Dornellas de Barros
Summary: This study developed and characterized alginate/brewer's spent grain AHC beads, which exhibited a high surface area and excellent adsorption performance for acetaminophen. The importance of alginate in adsorbent development was successfully demonstrated.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(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)
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)
Article
Biochemistry & Molecular Biology
Abu Hassan Nordin, Norzita Ngadi, Muhammad Luqman Nordin, Nur Amalina Noralidin, Walid Nabgan, Abdinasir Yusuf Osman, Rumaizi Shaari
Summary: This study presents the modification of chitosan with spent tea waste extract to enhance the removal of aspirin. The synthesized chitosan-STWE adsorbent showed good stability and low crystallinity. Increasing bed height and aspirin concentration improved the adsorption capacity, while higher flow rates reduced the quantity of adsorbed aspirin. The adsorption data matched well with the Thomas and Yoon-Nelson models, with a maximum adsorption capacity of 61.7 mg/g. The chitosan-STWE adsorbent was found to be non-toxic and suitable for wastewater treatment applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Environmental Sciences
Mery L. G. Vieira, Claudio P. Pinheiro, Keli A. Silva, Tito R. S. Cadaval, Guilherme L. Dotto, Luiz A. A. Pinto
Summary: In this study, glass particles were coated with bioblends of Spirulina sp. LEB-18/chitosan for potential use as adsorbents for acid and basic dyes. The coated particles showed high removal percentages for both types of dyes in batch adsorption and exhibited good adsorption capacities in fixed bed column operation. These bioblends coated glass particles can be applied as effective adsorbents for different types of dyes in adsorption column.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Chemical
Gabriela Kaminska, Jolanta Bohdziewicz, Laura Palacio, Antonio Hernandez, Pedro Pradanos
DESALINATION AND WATER TREATMENT
(2016)
Article
Engineering, Chemical
Jolanta Bohdziewicz, Mariusz Dudziak, Gabriela Kaminska, Edyta Kudlek
DESALINATION AND WATER TREATMENT
(2016)
Article
Chemistry, Multidisciplinary
Michal Adamczak, Gabriela Kaminska, Jolanta Bohdziewicz
PRZEMYSL CHEMICZNY
(2018)
Article
Polymer Science
Michal Adamczak, Gabriela Kaminska, Jolanta Bohdziewicz
Review
Polymer Science
Michal Adamczak, Gabriela Kaminska, Jolanta Bohdziewicz
INTERNATIONAL JOURNAL OF POLYMER SCIENCE
(2019)
Article
Chemistry, Multidisciplinary
Gabriela Kaminska, Mariusz Dudziak, Edyta Kudlek, Jolanta Bohdziewicz
Article
Environmental Sciences
Michal Adamczak, Gabriela Kaminska, Jolanta Bohdziewicz
Article
Engineering, Environmental
Gabriela Kaminska, Jolanta Bohdziewicz
OCHRONA SRODOWISKA
(2018)
Proceedings Paper
Engineering, Environmental
Michal Adamczak, Gabriela Kaminska, Jolanta Bohdziewicz
10TH CONFERENCE ON INTERDISCIPLINARY PROBLEMS IN ENVIRONMENTAL PROTECTION AND ENGINEERING EKO-DOK 2018
(2018)
Article
Engineering, Chemical
Michal Adamczak, Gabriela Kaminska, Jolanta Bohdziewicz
DESALINATION AND WATER TREATMENT
(2018)
Proceedings Paper
Engineering, Environmental
Edyta Kudlek, Mariusz Dudziak, Jolanta Bohdziewicz, Gabriela Kaminska
9TH CONFERENCE ON INTERDISCIPLINARY PROBLEMS IN ENVIRONMENTAL PROTECTION AND ENGINEERING (EKO-DOK 2017)
(2017)
Proceedings Paper
Energy & Fuels
Gabriela Kaminska, Mariusz Dudziak, Jolanta Bohdziewicz, Edyta Kudlek
INTERNATIONAL CONFERENCE ON ADVANCES IN ENERGY SYSTEMS AND ENVIRONMENTAL ENGINEERING (ASEE17)
(2017)
Article
Engineering, Environmental
Edyta Kudlek, Mariusz Dudziak, Jolanta Bohdziewicz, Gabriela Kaminska
JOURNAL OF ECOLOGICAL ENGINEERING
(2017)
Article
Engineering, Chemical
Gabriela Kaminska, Michal Adamczak, Jolanta Bohdziewicz
DESALINATION AND WATER TREATMENT
(2018)