Article
Environmental Sciences
Yi-xin Liu, Hui Zhong, Xiao-rong Li, Zhuan-li Bao, Zhi-peng Cheng, Yu-jie Zhang, Chun-xiang Li
Summary: In this study, an attapulgite-based dual sensitive poly(N-isopropylacrylamide-co-acrylic acid) composite hydrogel was successfully prepared and characterized. The composite hydrogel showed pH and temperature sensitive behavior, with good adsorption capacity under specific pH and temperature conditions. The addition of a small amount of attapulgite improved the adsorption capacity of the hydrogel. The composite hydrogel has potential application in dye wastewater treatment.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Chemistry, Applied
Zhi Chen, Zhi-Bo Zhang, Jun Zeng, Zhi-Jie Zhang, Shan Ma, Cong-Ming Tang, Jun-Qiang Xu
Summary: In this study, a polyethyleneimine-modified chitosan/Ce-UIO-66 composite hydrogel (PEI-CS/Ce-UIO-66) was successfully prepared using the ex-situ blend method. The synthesized composite hydrogel was characterized and its adsorption performance for methyl orange (MO) was evaluated. The results showed that PEI-CS/Ce-UIO-66 exhibited excellent adsorption properties for MO through electrostatic interaction, pi-pi stacking, and hydrogen bonding. These findings suggest that the PEI-CS/Ce-UIO-66 composite hydrogel has potential for the adsorption of anionic dyes.
CARBOHYDRATE POLYMERS
(2023)
Article
Engineering, Environmental
Xiaoliang Qi, Qiankun Zeng, Xianqin Tong, Ting Su, Lei Xie, Kai Yuan, Jianxiong Xu, Jianliang Shen
Summary: The study successfully synthesized a composite hydrogel adsorbent for dye adsorption, which showed tunable properties and excellent mechanical strength. The new adsorbent effectively avoids the secondary pollution typical of adsorbents, opening up a new horizon in mitigating environmental pollution from textile industries.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Polymer Science
Hamid Safarzadeh, Seyed Jamaleddin Peighambardoust, Seyed Hamed Mousavi, Reza Mohammadi, Seyed Hadi Peighambardoust
Summary: This study investigated the use of nanocomposite hydrogels containing bentonite clay nanoparticles for the removal of methyl violet dye. The results showed that the nanoparticles were successfully distributed in the hydrogel system, and a 10 wt. % concentration of bentonite nanoparticles achieved the highest dye adsorption efficiency. The thermodynamics studies indicated that the adsorption process was spontaneous, and the adsorption process was exothermic using both types of adsorbents. The Langmuir isotherm model was successfully used to describe the equilibrium behavior, and the pseudo-second-order model provided the best description of the kinetic behavior.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Chemistry, Physical
Hemant Mittal, Ali Al Alili, Pranay P. Morajkar, Saeed M. Alhassan
Summary: This study focused on preparing xanthan gum based hydrogel nanocomposites via chemical-crosslinking with graphene oxide for the highly efficient adsorption of crystal violet dye from contaminated wastewater. The results showed that the material has the potential to treat cationic dyes contaminated wastewater in large quantities, with good reuse efficiency demonstrated through twenty continuous cycles of adsorption-desorption.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Polymer Science
Tao Wan, Yang Jia, Songsong He, Tairan Wang, Jian Wang, Qi Tang, Mingrui Yu
Summary: Magnetic hydrogels have great potential in environmental applications for removing pollutants from water. In this study, Polyethyleneimine (PEI)-modified magnetic hydrogel nanocomposites (PEI-mHNCs) were prepared and used for the removal of crystal violet dye from aqueous solution. The results showed that PEI-mHNCs had good adsorption capacity and magnetic responsiveness, making it an efficient adsorbent for cationic dyes in water.
Article
Chemistry, Multidisciplinary
Xiangpeng Gao, Huiqing Yin, Mingyang Li, Lili Xin, Hao Zhang, Hongming Long
Summary: In this study, a novel organic composite photocatalyst (CCS/Bent-DETA) was synthesized and applied for the degradation of methyl orange (MO) under UV light irradiation. The structure, morphology, and optical properties of CCS/Bent-DETA were characterized, and the effects of various factors on the photocatalytic efficiency of MO degradation were investigated. It was found that CCS/Bent-DETA showed excellent performance, achieving 100% removal rate of MO after 120 minutes of reaction at pH 2.0. The study also provided insights into the adsorption process, reaction kinetics, stability, and regeneration potential of the photocatalyst.
REACTION CHEMISTRY & ENGINEERING
(2023)
Article
Environmental Sciences
Hossein Pooladi, Rauf Foroutan, Hossein Esmaeili
Summary: Recently, magnetically modified nanomaterials have attracted attention in wastewater treatment. A composite of wheat bran sawdust/Fe3O4 was studied for its ability to effectively adsorb methylene blue and methyl violet dyes from aqueous solution. The composite exhibited paramagnetic properties with high removal efficiency, and the Langmuir model best described the equilibrium behavior of the adsorption process, while the pseudo-second-order kinetic model was followed.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Engineering, Chemical
Ibrar Ibrar, Lilyan Alsaka, Sudesh Yadav, Ali Altaee, John L. Zhou, Ho Kyong Shon
Summary: This study proposes a biodegradable gravity-driven kappa-Carrageenan-vanillin hydrogel for biologically treated leachate wastewater treatment, reducing cost and brine management issues.
Article
Chemistry, Physical
Tayeb Benhalima, Fatima Zohra Allali, Nesrine Roumane, Hafida Ferfera-Harrar
Summary: This paper focuses on the synthesis of hybrid biocomposites by immobilizing treated diatomite within the network of carboxymethyl cellulose/dextran sulfate. The physical and chemical properties of the resulting beads were examined, along with their ability to adsorb cationic and anionic dyes. The study found that the immobilized diatomite improved the structural stability and adsorption capacity of the biocomposite beads. Furthermore, the beads demonstrated effective removal of the dyes, making them promising materials for dye adsorption.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Environmental Sciences
Elif Cerrahoglu Kacakgil, Aleyna Turanli, Cemil Dizman
Summary: This study investigates the synthesis and characterization of biobased polyesters with different acid values obtained from the condensation reaction of biobased itaconic acid and polyethylene glycol. UV curing is applied to form polymeric networks as adsorbent material from these polyesters containing different acids. Various characterization techniques such as FTIR, NMR, XPS, GPC, and SEM are used. The effects of different parameters on adsorption and the adsorption models are also studied. The results show that increasing acidity in the chemical structure of bio-based polymeric networks enhances the adsorption properties.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Polymer Science
Mohammad Reza Parsaeian, Ali Mohammad Haji Shabani, Shayessteh Dadfarnia, Reza Hafezi Moghaddam
Summary: A biocompatible hydrogel sorbent was prepared by chemically conjugating gum tragacanth polymer chains with polyvinyl alcohol, and then chemically stabilizing tannin on its surface using electron beam irradiation. The synthesized composite hydrogels were characterized using various analytical techniques. The ability of the hydrogel sorbent to remove methyl violet from aqueous solution was investigated, and the sorption data were analyzed using different isotherm and kinetic models.
Article
Green & Sustainable Science & Technology
S. Lamkhao, S. Tandorn, G. Rujijanagul, C. Randorn
Summary: In this study, a practical use-suited highly porous zinc oxide/polyacrylamide hydrogel composite photocatalyst was successfully synthesized and applied for the treatment of real wastewater. The results showed that the porous ZnO/PAM composite exhibited effective removal of color, BOD, and COD in both canal and industrial wastewater. It also demonstrated good long-term stability and recycling performance with high degradation efficiency even after 50 degradation cycles. The findings suggest that the highly porous zinc oxide/polyacrylamide hydrogel composite has great potential for use in real wastewater treatment.
MATERIALS TODAY SUSTAINABILITY
(2023)
Article
Environmental Sciences
Makfire Sadiku, Teuta Selimi, Avni Berisha, Arsim Maloku, Valbone Mehmeti, Veprim Thaci, Naim Hasani
Summary: In this study, the adsorption properties of halloysite nanoclay (HNC) on Methyl Violet (MV) were investigated through adsorption experiments and theoretical simulations. The experimental results showed that HNC had a high adsorption capacity for MV, and the adsorption process was a spontaneous, endothermic physisorption. Molecular simulations were consistent with experimental findings, confirming that HNC is an excellent dye adsorbent for industrial effluents.
Article
Engineering, Environmental
Xiao-Feng Sun, Yangyang Xie, Shuang Shan, Wenbo Li, Le Sun
Summary: The novel chemically-crosslinked composite hydrogel showed good adsorption performance for Cu2+ ions, following the Freundlich isotherm model and second-order kinetics. The adsorption process was enhanced at higher temperatures, indicating it is endothermal.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
