Article
Materials Science, Multidisciplinary
Bernd G. K. Steiger, Inimfon A. Udoetok, Omar Faye, Lee D. Wilson
Summary: Modification of biomaterials for controlled removal of sulfate is important for global water security, and in this study, ternary metal composites with varied counterions were prepared and characterized to study their adsorption properties towards inorganic and organic anions in aqueous media. The presence of different counterions affected the equilibrium and kinetic uptake of sodium sulfate and organic dyes, demonstrating a potential for tailored biopolymer adsorbents with switchable counterions.
ACS APPLIED POLYMER MATERIALS
(2021)
Review
Polymer Science
Ashoka Gamage, Nepali Jayasinghe, Punniamoorthy Thiviya, M. L. Dilini Wasana, Othmane Merah, Terrence Madhujith, Janardhan Reddy Koduru
Summary: Heavy metals, known for their toxic nature and ability to accumulate and magnify in the food chain, are a major environmental concern. The use of environmentally friendly adsorbents, such as chitosan (CS)-a biodegradable cationic polysaccharide, has gained attention for removing heavy metals from water. This review discusses the physicochemical properties of CS and its composites and nanocomposites and their potential application in wastewater treatment.
Review
Multidisciplinary Sciences
Chenxi Zhao, Guangyang Liu, Qiyue Tan, Mingkun Gao, Ge Chen, Xiaodong Huang, Xiaomin Xu, Lingyun Li, Jing Wang, Yaowei Zhang, Donghui Xu
Summary: This review article summarizes the preparation methods of hydrogels using biopolymers as the main raw materials, discusses the main categories and applications of biopolymer hydrogels, and emphasizes their great potential in environmental remediation.
JOURNAL OF ADVANCED RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Haddad A. El Rabey, Fahad M. Almutairi, Ahmed A. Tayel, Adel I. Alalawy, Ghena M. Mohammed, Meshari M. Aljohani, Ali A. Keshk
Summary: This study successfully constructed super magnetic adsorbent nanocomposites (NCs) using nanoparticles of chitosan, lignin, and phycosynthesized iron nanoparticles. The NCs showed great potential in removing oil pollution in water and exhibited excellent recovery and reusability properties.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Applied
Jawza Sh Alnawmasi
Summary: In this study, an ion-imprinting technique was employed to create a lead ion-imprinted sorbent using a derivative of amino-thiol chitosan (Pb-ATCS). The synthetic steps involved amidizing chitosan with 3-Nitro-4-sulfanylbenzoic acid (NSB) units, selectively reducing the -NO2- residues to -NH2, and cross-linking with epichlorohydrin. The resulting sorbent showed a high affinity for Pb (II) ions and a maximum capacity of approximately 300 mg/g.
CARBOHYDRATE POLYMERS
(2023)
Article
Polymer Science
Wenjie Du, Jinxu Fan, Rui Ma, Gang Yang, Jiaqi Liu, Shifan Zhang, Tao Chen
Summary: A novel chitosan-based double network hydrogel was synthesized and applied as an efficient adsorbent to remove methylene blue. The hydrogel exhibited high strength, good adsorption properties, and a large specific surface area with developed pore structure. The adsorption process was influenced by pH, temperature, and adsorbent dose, fitting well with pseudo-second-order kinetic model and Langmuir isotherm.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Environmental Sciences
Kok Yuen Koh, Zhihao Chen, Sui Zhang, J. Paul Chen
Summary: This study synthesized and tested several chitosan/lanthanum hydrogel beads for phosphate removal, with one particular bead showing exceptional performance and the ability to be regenerated and reused effectively. The mechanism of phosphate removal by the bead involves electrostatic attraction and ion exchange.
Article
Environmental Sciences
Hai Lin, Dongsheng Yang, Conghui Zhang, Wei Liu, Liping Zhang, Yingbo Dong
Summary: Modified biochars have great potential for removing heavy metals from aquatic environments, but the presence of macro amounts of metal ions, such as Ca, usually affects the removal of heavy metals by biochars. Increasing the alkali metal content of biochar to enhance its ion exchange capacity is a promising method to improve its selectivity.
Review
Environmental Sciences
Einallah Khademian, Ehsan Salehi, Hamidreza Sanaeepur, Francesco Galiano, Alberto Figoli
Summary: Carbohydrate biopolymers have emerged as promising adsorbents for copper remediation due to their effectiveness and environmental friendliness. This review examines different synthesis methods of carbohydrate biopolymer adsorbents and discusses their adsorption capacity, kinetics, thermodynamics, regeneration, and reusability for copper ions. Valuable outcomes from thermokinetic and reusability investigations are critical for designing and scaling up the adsorption process in a technically, economically, and environmentally sustainable manner.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
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
Engineering, Chemical
Jiaqi Xu, Pan Chen
Summary: In this study, a high-performance lithium-ion sieve was prepared using inexpensive attapulgite. The sieve exhibited excellent adsorption efficiency, selectivity, and recycling properties. The formation of a lithium ion memory pore and the filling of pores by lithium ions were observed during the adsorption process. The study provides a new approach to the market application of attapulgite resources.
Article
Chemistry, Applied
Satoru Takeshita, Shanyu Zhao, Wim J. Malfait
Summary: An aldehyde-free, transparent chitosan aerogel has been developed using a microstructure-tunable process. The aerogel exhibits high surface areas, large mesopore volumes, and optical transparency. The microstructure formation of the aerogel is controlled by the timing of chitosan coagulation, depending on urea concentration.
CARBOHYDRATE POLYMERS
(2021)
Article
Polymer Science
Fahad M. Almutairi, Haddad A. El Rabey, Adel Alalawy, Alzahraa A. M. Salama, Ahmed A. Tayel, Ghena M. Mohammed, Meshari M. Aljohani, Ali A. Keshk, Nasser H. Abbas, Mohamed M. Zayed
Summary: The study innovatively synthesized nanopolymer composites using biopolymers and nanomaterials to remove hexavalent chromium (Cr6+) from water. By combining chitosan and alginate with phycosynthesized iron nanoparticles, effective removal of Cr6+ was achieved through adsorption.
Article
Polymer Science
Vadim V. Zefirov, Victor E. Sizov, Stanislav Dvoryak, Alexander A. Gulin, Vladimir G. Sergeyev, Marat O. Gallyamov
Summary: Composites based on chitosan coatings and metal ions are of great interest due to their antibacterial properties and biocompatibility. This study demonstrates the use of a chitosan coating obtained from an aqueous carbonic acid solution on polypropylene nonwoven fibers, resulting in uniform thin copper-containing films with improved adhesion and reduced aggregation of growing particles. The proposed method provides a new approach to manufacturing antibacterial polymer-inorganic composites.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Kevy Pontes Eliodorio, Gilberto Jose Pereira, Andreia de Araujo Morandim-Giannetti
Summary: This study synthesized and characterized chitosan functionalized with three different ionic liquids for hexavalent chromium effluent treatment. The adsorbents exhibited enhanced adsorption properties, with the best pH level for adsorption being 3 and high adsorption capacities. The reusability of the adsorbent was also investigated and showed significant results after 4 cycles.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Environmental Sciences
Uttam Kumar Sahu, Manoj Kumar Sahu, Siba Sankar Mahapatra, Raj Kishore Patel
WATER AIR AND SOIL POLLUTION
(2017)
Article
Green & Sustainable Science & Technology
Basanti Ekka, Rajendra S. Dhaka, Raj Kishore Patel, Priyabrat Dash
JOURNAL OF CLEANER PRODUCTION
(2017)
Article
Chemistry, Physical
Uttam Kumar Sahu, Sumanta Sahu, Siba Sankar Mahapatra, Raj Kishore Patel
JOURNAL OF MOLECULAR LIQUIDS
(2017)
Article
Chemistry, Multidisciplinary
Mahamudur Islam, Rajkishore Patel
SEPARATION SCIENCE AND TECHNOLOGY
(2017)
Article
Chemistry, Multidisciplinary
Sumanta Sahu, Uttam Kumar Sahu, Raj Kishore Patel
NEW JOURNAL OF CHEMISTRY
(2018)
Article
Thermodynamics
Sumanta Sahu, Uttam Kumar Sahu, Raj Kishore Patel
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2019)
Article
Thermodynamics
Sumanta Sahu, Padmaja Kar, Nisarani Bishoyi, Laxmi Mallik, Raj Kishore Patel
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2019)
Article
Environmental Sciences
Sandip Mandal, Sangeeta Adhikari, Shengyan Pu, Xiaoke Wang, Do-Heyoung Kim, Raj Kishore Patel
Article
Engineering, Environmental
Samir Mohanta, Monaj Kumar Sahu, Prakash Chandra Mishra, Anil Kumar Giri
Summary: In this study, activated charcoal derived from Sapindus trifoliate L fruit biomass was used for the removal of hexavalent chromium from aqueous solution in continuous fixed-bed column studies. The breakthrough and saturation time of chromium solutions were found to increase with higher bed-height and initial concentration. The Thomas model was found to be the best-fitted model to predict the adsorption of hexavalent chromium in fixed-bed column studies based on Adjusted R-2 and estimated standard error comparisons. The activated charcoal was characterized using SEM-EDX and FTIR analysis.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Uma Sankar Behera, Prakash Chandra Mishra, G. B. Radhika
Summary: This study focused on using guava leaves as a natural adsorbent for arsenic (III) removal, while investigating the impact of different process variables on adsorption efficiency. Through batch mode experiments and various characterization methods, optimal adsorption parameters were determined. The results indicated that guava leaves have a good adsorption capacity for As(III) removal.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Abhijit Behera, Sumanta Sahu, Souman Pahi, Satish Kumar Singh, Bikash Mahapatra, Raj Kishore Patel
Summary: In this study, a novel polypyrrole modified alpha-zirconium phosphate nanocomposite was synthesized and demonstrated its potential in removing hexavalent chromium.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Uttam Kumar Sahu, Ying Zhang, Wei Huang, Hui Ma, Sandip Mandal, Sumanta Sahu, Manoj Kumar Sahu, Raj Kishore Patel, Shengyan Pu
Summary: In this study, a tea waste/CeO2 bio-composite was synthesized and evaluated for the remediation of Cr(VI) in contaminated water. The bio-composite demonstrated high removal efficiency, with 96% of Cr(VI) being removed under optimized conditions. The material also showed good reusability, with 85% removal efficiency in the fourth consecutive cycle.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Environmental Sciences
Anil Kumar Giri, Prakash Chandra Mishra
Summary: This research explores the use of neutralized activated red mud (NARM) in a continuous fixed bed column for the removal of fluoride from water. The artificial neural network (ANN) technique is effectively applied to optimize the model for practical removal processes. Various experimental variables, such as bed length, adsorbate concentration, experimental time, and adsorbate solution flow rate, are studied to determine the breakthrough point and saturation times. The highest removal potential of NARM is achieved at a bed height of 15 cm, starting concentration of 1 ppm, susceptible time of 120 min, adsorbate solution flow rate of 0.5 mL/min, and constant room temperature. Bohart-Adams and Thomas models are used to describe the effects of the fixed bed column on bed height and adsorbate concentrations. The experimental data is utilized in an artificial neural network model, which shows a high degree of correlation with the actual results from experimental analysis.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Souman Pahi, Sumanta Sahu, Satish Kumar Singh, Abhijit Behera, Raj Kishore Patel
Summary: In this study, the light-harvesting abilities of TiO2 were significantly enhanced by doping with Zr and N, leading to the fabrication of an efficient TiO2/g-C3N4 heterostructure for photocatalytic degradation of pollutants. The doped system exhibited a reduced band edge and increased recombination rate of photogenerated electron-hole pairs, resulting in superior photocatalytic H-2 evolution through a z-scheme mechanism.
NANOSCALE ADVANCES
(2021)
Article
Engineering, Environmental
Basanti Ekka, Soumitra R. Nayak, L. Satish K. Achary, Sarita, Aniket Kumar, Shradha Mawatwal, Rohan Dhiman, Priyabrat Dash, Raj Kishore Patel
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2018)
