Article
Engineering, Environmental
Arukula Deepa, Sonalika Sonal, Brijesh Kumar Mishra
Summary: This study investigates the comparative performance of a hybrid biofilter in reducing Cr (VI) and organic pollutants in tannery wastewater. The results show that Co-im/B.M.B performs better than Im/S.AM.B under optimized conditions. Additionally, analysis of the surface morphology and chemistry of Co-im/B.M.B reveals that Cr (VI) reduction mainly occurs through precipitation, electrostatic attraction, and metal complexation.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Chemical
Maria Villen-Guzman, Carlos Jimenez, Jose Miguel Rodriguez-Maroto
Summary: The study found that Spirulina has higher removal capacity at pH 5.2 and lower adsorption capacity at higher ionic strength, suggesting ion exchange as a relevant mechanism. Immobilizing Spirulina on alginate beads not only increases adsorption capacity but also overcomes limitations in column systems. Dose-response model was the most appropriate to describe the biosorption process.
Article
Chemistry, Physical
Lacramioara Rusu, Cristina-Gabriela Grigoras, Andrei-Ionut Simion, Elena-Mirela Suceveanu, Andreea V. Dediu Botezatu, Maria Harja
Summary: This study investigated the removal of ethacridine lactate from aqueous solution using a biosorbent material based on residual microbial biomass and natural polymers in a fixed-bed continuous column. The results showed that lower flow rates, greater bed heights, and a lower concentration of ethacridine lactate led to an increased biosorption of the target compound. The biosorption dynamic was analyzed using multiple mathematical models, and the Yoon-Nelson, Clark, and Yan models fit well with the experimental data.
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
Engineering, Environmental
Oputu Ogheneochuko, Ntshoko Zintle, Fester Veruscha
Summary: Sustainable waste management practices involve utilizing renewable resources for waste disposal. This study found that waste derived from pineapple can be used as a biosorbent for removing cobalt ions from water. Batch and column studies showed that modified pineapple waste exhibited good removal performance. Kinetic and equilibrium data were best described by the pseudo-second-order and Freundlich isotherm, respectively, while column data fitted well with the Yoon Nelson model. Thomas's model successfully described the behavior of the pineapple waste in removing cobalt ions from real wastewater.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Diego Juela, Mayra Vera, Christian Cruzat, Ximena Alvarez, Eulalia Vanegas
Summary: In this study, the dynamic behavior of sulfamethoxazole adsorption on sugarcane bagasse was studied and compared using analytical models and a theoretical mechanistic model. The Log-Gompertz model showed the best agreement with experimental data, while the mechanistic model accurately predicted breakthrough curves and estimated relevant parameters. Increasing global mass transfer coefficient (K-i) resulted in a faster adsorption rate, and high axial dispersion coefficient (D-z) values led to lower adsorption capacities of the adsorbent, highlighting the importance of axial dispersion in sulfamethoxazole adsorption on sugarcane bagasse.
Article
Environmental Sciences
Bettathavarekere Lingamurthy Dinesha, Sharanagouda Hiregoudar, Udaykumar Nidoni, Kotrappa Thowdur Ramappa, Anilkumar T. Dandekar, Sharanabasava V. Ganachari
Summary: This study aims to develop a chitosan-zinc oxide nano-adsorbent-coated sand (CZOCS) filter bed for safe treatment of milk processing industry wastewater (MPIW). The CZOCS showed higher reduction efficiencies with increased bed height due to longer interaction time between influent and adsorbent. The adsorption capacity of CZOCS increased at the 95% column exhaustion point for BOD and COD, and the adsorbent exhibited high reusability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Xuan Han, Yong Zhang, Chunmiao Zheng, Xiangnan Yu, Shiyin Li, Wei Wei
Summary: In this study, a novel nanocrystalline chlorapatite (CIAP) was successfully prepared using eggshell wastes as a calcium source by a green method. The CIAP showed excellent stability and adsorption performance for Cr(VI), and demonstrated potential for multiple reuses. This material has the capability to be a promising candidate for enhancing oxyanion contaminants such as Cr(VI) removal from water.
Article
Chemistry, Multidisciplinary
Luiza Ioana Horciu, Carmen Zaharia, Alexandra Cristina Blaga, Lacramioara Rusu, Daniela Suteu
Summary: The study utilized residual Bacillus sp. biomass for dye biosorption and confirmed its potential as a good biosorbent in dynamic operating systems for treating wastewater containing small quantities of organic dyes.
APPLIED SCIENCES-BASEL
(2021)
Article
Environmental Sciences
Na Lv, Xiufen Li
Summary: The study investigated the adsorption of phosphorus in low-concentration phosphorus wastewater using a modified calcium-modified attapulgite (Ca-GAT). The study explored the effects of various parameters on dynamic phosphorus adsorption and found that the adsorption ability improved with increased bed height and flow rate, and decreased initial phosphorus concentration. Breakthrough curves were fitted using four models, with the Thomas model determining a maximum adsorption amount of 13.477 mg/g. The study also found that NaOH regeneration had the best effect, and the breakthrough point was achieved after 177 hours in treating actual MBR effluent. These findings suggest that Ca-GAT has potential for the treatment of low-concentration phosphorus wastewater.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(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
Chemistry, Physical
Talles Barcelos da Costa, Meuris Gurgel Carlos da Silva, Melissa Gurgel Adeodato Vieira
Summary: The study investigates the continuous biosorption of lanthanum in a fixed-bed column system using sericin/alginate/polyvinyl alcohol-based beads. Results show that the beads are effective in recovering lanthanum with high removal efficiency and recovery rate, paving the way for a separation system of rare-earths based on waste biomass.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Multidisciplinary Sciences
Ghada E. Dawwam, Nehad M. Abdelfattah, Mohamed O. Abdel-Monem, Hossam S. Jahin, Amal M. Omer, Khadiga A. Abou-Taleb, Eman S. Mansor
Summary: Heavy metals, including lead, have detrimental effects on human health and the environment. This study identified two efficient bacteria strains, 8EF and 17OS, for growing on media supplemented with Pb2+. The isolate 17OS showed remarkable resistance to multiheavy metals and was identified as Paenibacillus dendritiformis 17OS. Further optimization of Pb2+ removal by the tested bacteria using Design-Expert revealed significant variables affecting the removal process, and the strain was able to modulate these variables for maximum removal. Dead biomass of P. dendritiformis 17OS was then used to create a hydrophilic adsorptive membrane for easy separation of Pb2+ from aqueous solutions.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Camila Magalhaes de Sousa, Vicelma Luiz Cardoso, Fabiana Regina Xavier Batista
Summary: The increasing development of industries has led to excessive exploitation of natural resources and unregulated discharge of wastewater into the environment. Heavy metals, such as chromium, are highly toxic and persistent in nature. This study investigates the synergistic photocatalytic process for the reduction and removal of Cr (VI), using niobium oxide (Nb2O5) and microalgae Chlamydomonas reinhardtii in separate phases. The results show that the proposed model provides an average total removal of 71%, 31%, and 18% for initial concentrations of 10, 30, and 50 mg/L of Cr (VI), respectively.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Environmental Sciences
Patricia Trevisani Juchen, Marcia Teresinha Veit, Gilberto da Cunha Goncalves, Soraya Moreno Palacio, Jacqueline Ferandin Honorio, Pedro Yahico Ramos Suzaki
Summary: The fixed-bed column biosorption process using malt bagasse was studied to evaluate dye biosorption capacity and obtain mass transfer parameters. The Langmuir isotherm was used to represent equilibrium data, and a mathematical model considering internal diffusion resistance accurately predicted the dynamic behavior of the biosorption column operation.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Water Resources
K. Vijayaraghavan, Anay Badavane
URBAN WATER JOURNAL
(2017)
Article
Green & Sustainable Science & Technology
Janaki Venkatachalam, Kamala-Kannan Seralathan
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2017)
Article
Engineering, Chemical
K. Vijayaraghavan, S. Rangabhashiyam, T. Ashokkumar, Jesu Arockiaraj
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2017)
Article
Polymer Science
R. Rathika, Oh Byung-Taek, B. Vishnukumar, K. Shanthi, S. Kamala-Kannan, V. Janaki
Article
Green & Sustainable Science & Technology
Jeong Ae Kim, K. Vijayaraghavan, D. Harikishore Kumar Reddy, Yeoung-Sang Yun
JOURNAL OF CLEANER PRODUCTION
(2018)
Article
Green & Sustainable Science & Technology
Harshavardhan Mohan, Dhanakumar Selvaraj, Shanthi Kuppusamy, Janaki Venkatachalam, Yool-Jin Park, Kamala-Kannan Seralathan, Byung-Taek Oh
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2019)
Article
Green & Sustainable Science & Technology
Kuppusamy Vijayaraghavan, T. Ashokkumar
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2019)
Article
Environmental Sciences
R. Rathika, V Janaki, K. Shanthi, S. Kamala-Kannan
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2019)
Review
Construction & Building Technology
K. Vijayaraghavan, D. Harikishore Kumar Reddy, Yeoung-Sang Yun
SUSTAINABLE CITIES AND SOCIETY
(2019)
Article
Chemistry, Multidisciplinary
S. Rangabhashiyam, K. Vijayaraghavan
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Thirunavukkarasu Ashokkumar, Kuppusamy Vijayaraghavan
Review
Environmental Sciences
K. Vijayaraghavan
Summary: The mineral ingredients in biochar play a crucial role in influencing its properties and applications, which has been highlighted in recent research. The mineral composition of biochar is impacted by factors such as feedstock type and pyrolysis parameters, ultimately affecting its pH, conductivity, surface area, and structure. These mineral ingredients are essential for biosorption of contaminants and enable biochar to be used in various applications beyond soil improvement.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Review
Engineering, Environmental
K. Vijayaraghavan, T. Ashokkumar
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2017)
Article
Chemistry, Physical
D. Harikishore Kumar Reddy, K. Vijayaraghavan, Jeong Ae Kim, Yeoung-Sang Yun
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2017)