Article
Biochemistry & Molecular Biology
Peiyuan Xiao, Junqing Xu, Hongliang Shi, Fengyang Du, Huanzheng Du, Guangming Li
Summary: A chitosan-based magnetic porous microsphere (PPy@PMCS) was proposed for simultaneous Cr(VI) reduction and Cr(III) sequestration in a wide pH range. The abundant interaction sites of PPy@PMCS allowed for effective Cr(VI) adsorption and immediate reduction to less toxic Cr(III). The resulting Cr(III) was in-situ sequestrated by the complexation of chitosan matrix. PPy@PMCS exhibited superior adsorption capacity, even at near neutral pH, and could be easily separated and regenerated under an external magnetic field.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
Kalvakunta Paul Reddy, Catherine Swetha, Arumugam Murugadoss
Summary: Here, a rational and highly sustainable method is reported for the gram-scale synthesis of solid chitosan polymer-supported palladium nanoparticles (Pd/Chit) without the use of toxic solvents or expensive purification processes. The Pd nanoparticles are deposited onto a chitosan polymer using ascorbic acid and NaOH. The Pd/Chit catalyst demonstrates enhanced catalytic activity and selectivity due to the novel interface structure at the Pd-chitosan site and the greater number of accessible active sites at the Pd NP sites.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Environmental
Nooraddein A. Ekrayem, Almahdi A. Alhwaige, Wael Elhrari, Mohamed Amer
Summary: The study developed eco-friendly polymeric spheres derived from crosslinking of chitosan (CTS) with different polyesters. The spheres showed enhanced structure and stability in aqueous media, with decreased hydrophilicity, and were effective in adsorbing lead ions (Pb2+) from aqueous solutions. The experimental data was fitted well with the Freundlich isotherm model, showing the best fit for the adsorption process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Gopalakrishnan Sarojini, Samikannu Venkatesh Babu, Manivasagan Rajasimman
Summary: The study tested the ability of a polypyrrole-Iron oxide-seaweed nanocomposite to remove congo red from aqueous solution. The nanocomposite showed high efficiency in removing the dye under optimized conditions and could be effectively reused up to five cycles. Adsorption isotherm studies, kinetic studies, and thermodynamic properties were investigated to understand the mechanism of sorption. The outcomes prove the nanocomposite to be a promising, recyclable, and cost-effective adsorbent for dye-bearing water treatment.
Article
Engineering, Environmental
Yimeng Li, Lizhen Lan, Fengkai Zhou, Jiamin Peng, Lamei Guo, Fujun Wang, Ze Zhang, Lu Wang, Jifu Mao
Summary: In this study, a flexible polypyrrole membrane (PPy-B) with bayberry-like vesicle structures was prepared using template-assisted interfacial polymerization. Sodium sulfosalicylate was introduced as a dopant to improve the flexibility and strength of the membrane, as well as to increase the specific surface area and doping level. The PPy-B membrane exhibited high adsorption capacity, reusability, and ultimate adsorption capacity, making it a promising candidate for wastewater treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Polymer Science
Jorge Lozano-Montante, Raquel Garza-Hernandez, Mario Sanchez, Edgar Moran-Palacio, Guillermo Nino-Medina, Mario Almada, Luis Hernandez-Garcia
Summary: This study successfully achieved the adsorption of Pb(II) ions in water by cellulose derivatives, and identified that cellulose composite materials cross-linked with chitosan modified with 2-methylpyridine and succinic anhydride have higher adsorption capacities. Kinetic data showed a pseudo-second-order behavior in the adsorption process.
Article
Polymer Science
Alper Omer Yasar, Ismet Kaya
Summary: Chitosan/polypyrrole (Ks/PPy) nanoparticles were synthesized and embedded in a poly(acrylamide) (PAAm) hydrogel matrix. The PAAm-Ks/PPy hydrogels were treated with hydrochloric acid (HCl), resulting in an increase in electrical conductivity and adsorption performance.
Article
Environmental Sciences
Anitha Thulasisingh, Seenuvasan Muthulingam, Mohan Kumar, Naveenraj Rajasekar, Shantanu Mohanraj, Carlin Geor Malar
Summary: Biosorption using a chitosan-pectinase blend (CPB) was studied for the removal of methylene blue (MB) dye from synthetic solutions. The blend showed a rough surface morphology and amorphous nature. Fourier-transform infrared (FTIR) analysis confirmed the successful blend formation. Maximum adsorption was achieved at pH 7.0, 30°C, 30 min contact time, and an adsorbent dosage of 2.5 g/L. The pseudo-second-order model provided the best fit, with the highest R2 value close to 1. The Temkin isotherm model showed the highest adsorption capacity at 16.81 mg/g. The blend demonstrated good desorption ability, allowing for reuse in dye removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Perumal Karthikeyan, Sankaran Meenakshi
Summary: A novel and environmentally-friendly chitosan encapsulated magnetic kaolin beads were fabricated and applied for the adsorption of phosphate and nitrate ions from water in this study. The synthesized beads showed promising potential as selective and effective adsorbents for the removal of phosphate and nitrate ions from aqueous solutions.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Biochemistry & Molecular Biology
Tingting Xu, Huanli Gao, Jiahuan Zhou, Ming He, Xingxiang Ji, Hongqi Dai, Orlando J. Rojas
Summary: In this study, a one-step electrodeposition method was used to prepare chitosan/Ag/polypyrrole films, and layer-by-layer self-assembly was used to introduce lignin sulphonate (LS) to obtain chitosan/Ag/polypyrrole/LS films. The antibacterial effects against E. coli and S. aureus were demonstrated, and the addition of self-assembled LS further improved the efficacy. The films also showed rapid and efficient endotoxin adsorption, with the electrostatic interactions between chitosan and endotoxin molecules playing a major role.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Magdalena Blachnio, Malgorzata Zienkiewicz-Strzalka, Anna Derylo-Marczewska, Liudmyla V. V. Nosach, Eugeny F. F. Voronin
Summary: A new type of composite material, biopolymer-silica materials, is proposed as selective and effective adsorbents. A new synthesis procedure using geometrical modification of silica and mechanosorption of chitosan is applied to create chitosan-nanosilica composites (ChNS) and chitosan-silica gel composites (ChSG). The adsorption efficiency of ChNS and ChSG towards anionic dyes was analyzed and the results showed that ChNS had faster adsorption kinetics due to the silica-type effect.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Polymer Science
Dovile Liudvinaviciute, Ramune Rutkaite, Joana Bendoraitiene, Rima Klimaviciute, Greta Zambzickaite
Summary: The adsorption behavior of CA on CH powder was studied, revealing that with increasing adsorption temperature, the rate of adsorption increased while the amount of adsorbed CA decreased. The Langmuir adsorption model predicted that CA mainly adsorbed on the ionized amino groups of CH.
Article
Chemistry, Physical
Fen Zhang, Luyao Xi, Meiqi Zhao, Yaguang Du, Liying Ma, Shaohua Chen, Hengpeng Ye, Dongyun Du, Tian C. Zhang
Summary: In this study, a novel composite of PPy/NP was synthesized and applied for the efficient removal of hexavalent chromium from aqueous solutions. The results showed that the PPy/NP composites exhibited better Cr(VI) removal performance than PPy alone, and could be used as recyclable absorbents for multiple cycles.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Polymer Science
Nouf Faisal Alharby, Ruwayda S. Almutairi, Nadia A. Mohamed
Summary: The chemical cross-linking of carboxymethyl chitosan was used to obtain a novel hydrogel for efficient removal of Methylene Blue dye from aqueous solution. Factors such as temperature and pH were found to significantly impact the adsorption capacity of the hydrogel, with higher temperatures and pH values leading to increased adsorption. The pseudo-second-order mechanism was found to be predominant in the adsorption process, with the Langmuir model showing high applicability.
Article
Chemistry, Applied
Thais Strieder Machado, Larissa Crestani, Giovana Marchezi, Flavia Melara, Jonatan Rafael de Mello, Guilherme Luiz Dotto, Jeferson Steffanello Piccin
Summary: This study developed a promising adsorbent, silica/chitosan modified with different proportions of glutaraldehyde, which effectively increased the adsorption efficiency of diclofenac sodium. The adsorption mechanism analysis revealed that the process is predominantly chemical, with a high affinity between the adsorbents and diclofenac sodium.
CARBOHYDRATE POLYMERS
(2022)
Article
Engineering, Environmental
Rathinam Karthik, Sankaran Meenakshi
CHEMICAL ENGINEERING JOURNAL
(2015)
Article
Biochemistry & Molecular Biology
Rathinam Karthik, Sankaran Meenakshi
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2015)
Article
Chemistry, Multidisciplinary
Rathinam Karthik, Sankaran Meenakshi
SEPARATION SCIENCE AND TECHNOLOGY
(2016)
Article
Chemistry, Applied
Karthik Rathinam, Swatantra Pratap Singh, Christopher J. Arnusch, Roni Kasher
CARBOHYDRATE POLYMERS
(2018)
Article
Engineering, Environmental
Karthik Rathinam, Yoram Oren, Winfried Petry, Dietmar Schwahn, Roni Kasher
Article
Chemistry, Multidisciplinary
Swatantra Pratap Singh, Karthik Rathinam, Roni Kasher, Christopher J. Arnusch
Article
Green & Sustainable Science & Technology
Karthik Rathinam, Preethi Jayaram, Meenakshi Sankaran
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2019)
Article
Engineering, Environmental
Karthik Rathinam, Shiju Abraham, Yoram Oren, Dietmar Schwahn, Winfried Petry, Yair Kaufman, Roni Kasher
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Biochemistry & Molecular Biology
Jayaram Preethi, M. Hasmath Farzana, Karthik Rathinam, Sivakumar Vigneshwaran, Perumal Karthikeyan, Sankaran Meenakshi
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2020)
Article
Chemistry, Physical
Zeid A. ALOthman, Ahmad Yacine Badjah, Osamah M. Alduhaish, Karthik Rathinam, Stefan Panglisch, Imran Ali
Summary: Copper nanoparticles were synthesized and utilized to remove ketoprofen pollutant, showing excellent adsorption performance and cost-effectiveness for natural water resources.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Applied
S. Sd Elanchezhiyan, Perumal Karthikeyan, Karthik Rathinam, M. Hasmath Farzana, Chang Min Park
Summary: The magnetic kaolinite immobilized in chitosan beads (MKa@CB) has shown great potential in removing Pb(II) and Cd(II) ions from water. The adsorbent has high efficiency and stability in removing contaminants, and can be reused multiple times.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Physical
Karthik Rathinam, Xinwei Kou, Ralph Hobby, Stefan Panglisch
Summary: The study focused on the removal of alizarin red S (ARS) dye using a magnetic chitosan core-shell network (MCN). The synthesized MCN showed effective removal of ARS dye, reaching equilibrium after 60 min, with pH playing a major role. The results also indicated that electrostatic interactions dominated the removal of ARS dye under acidic conditions.
Article
Environmental Sciences
Grit Hoffmann, Karthik Rathinam, Matthias Martschin, Ivana Ivancev-Tumbas, Stefan Panglisch
Summary: Micropollutants (MPs) in wastewater pose environmental challenges and require advanced treatment methods for removal, such as dosing powdered activated carbon (PAC) before membrane filtration. Research shows that the efficiency of MPs removal is influenced by the PAC concentration in the stock suspension, with lower concentrations leading to better removal. Therefore, maintaining a low PAC concentration in the stock suspension can enhance the overall performance of the treatment process.
Article
Engineering, Chemical
Karthik Rathinam, Akshay Modi, Dietmar Schwahn, Yoram Oren, Roni Kasher
Summary: This study aims to reduce calcium phosphate scaling on reverse osmosis (RO) membranes during municipal wastewater desalination. By graft polymerization using hydrophilic methacrylate monomers, the modified membranes showed improved antiscaling performance, especially when grafted with neutral and mixed charge monomers.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Karthik Rathinam, Swatantra P. Singh, Yilun Li, Roni Kasher, James M. Tour, Christopher J. Arnusch
