Article
Chemistry, Physical
Yayu Tian, Hongzhu Ma, Baoshan Xing
Summary: Fe3O4/3MEG-I demonstrated rapid adsorption efficiency and tunable adsorption properties through adjusting the amount of MEG. The adsorption process better fitted the Langmuir isotherm and pseudo-second-order kinetic models. It efficiently adsorbed both anionic and cationic dyes under neutral conditions.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Jin Yang, Zhisong Bi, Siyu Zhang, Liru Zeng, Yanni Zhang, Yingnan Wang, Junfeng Yan, Wu Zhao, Yang Dai, Jiangni Yun
Summary: In this study, gamma-graphyne was successfully synthesized and used as an adsorbent for removing organic dyes. The chemical structure and morphology of gamma-graphyne were confirmed through various techniques. The adsorption capacities and energies of gamma-graphyne were determined, indicating its excellent adsorption performance. The results highlight the potential of gamma-graphyne as a promising material for water pollutant treatment.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Engineering, Chemical
Zhenxin Zhang, Mingchang Zhang, Xiaoqi Zhao, Jinzhen Cao
Summary: Treating wastewater contaminated with organic dyes is a complex challenge in water pollution control. This study successfully synthesized an activated biochar from wood modified with phenol-formaldehyde resin and potassium hydroxide, which exhibited high adsorption capacity for dyes. The adsorption process followed the pseudo-second-order kinetic model and Langmuir isotherm model, and the primary mechanism involved pore filling and cooperative effects.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Environmental
Arif Chowdhury, Bhagirath Mahto, Sunita Kumari, Afaq Ahmad Khan, Sahid Hussain
Summary: A new type of nanostructured adsorbent, quaternary Fe-Ni-Co-S nanostructures (FNCS), has been successfully synthesized using a simple precipitation method in water at low temperatures. The composition and structure of the nanostructures were confirmed through various analytical techniques. The nanostructure exhibited remarkable adsorption capacity towards Congo red, Cr(VI), and As(V) ions, with maximum adsorption capacities of 4259 mg g-1, 1178 mg g-1, and 2771 mg g-1, respectively. The adsorption mechanism involved a two-step process, with monolayer adsorption through hydrogen bonding and metal coordination in the first step, and hydrophobic interaction (π-π interactions) between adsorbate molecules in the second step. Additionally, the nanostructure demonstrated high efficiency in removing Cr(VI) from synthetic wastewater through reduction to Cr(III) and precipitation on the surface. Thermodynamic analysis confirmed the spontaneous and exothermic nature of the adsorption process, which was favorable at low temperatures.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Applied
Tianyu Yin, Xinyu Zhang, Shuai Shao, Tao Xiang, Shaobing Zhou
Summary: In this study, covalently crosslinked porous cryogels with high adsorption capacity and reusability were fabricated for the removal of cationic dyes in wastewater. The cryogels exhibited excellent adsorption performance under alkaline conditions, and maintained their adsorption capacity and selective adsorption capability after regeneration.
CARBOHYDRATE POLYMERS
(2023)
Review
Chemistry, Multidisciplinary
Ji-Min Yang
Summary: Dye wastewater pollution is a widespread problem that hinders sustainable development. Adsorption, particularly using metal-organic frameworks, is considered a promising technique for the effective removal of toxic dyes. This review focuses on recent advancements in functionally modified MOFs as adsorbents for organic dye removal, and systematically examines the effects of various modification strategies on the adsorption process.
Article
Chemistry, Analytical
Guojun Yin, Zhuoqun Sun, Yuan Gao, Shiai Xu
Summary: This study investigated the adsorption of malachite green by expanded graphite, and found that all EGs adsorption data could be well fitted by the Langmuir equation, indicating a spontaneous physical process. Regeneration experiments showed high removal efficiency of EG even after five cycles without the need for chemical reagent washing.
MICROCHEMICAL JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Man Yuan, Dongsheng Liu, Sisi Shang, Zihao Song, Qi You, Longjin Huang, Sheng Cui
Summary: This study presents a novel magnetic hybridized aerogel for efficiently removing heavy metals from wastewater. The hybrid aerogel, with a slit-like porous structure and numerous exposed active sites, exhibits high adsorption capacity for metal ions. The adsorption process is primarily attributed to monolayer chemical adsorption, and the hybrid aerogel shows higher adsorption affinity and preferential selectivity for Pb2+. The study also highlights the fast magnetic responsiveness and easy recovery of the hybrid aerogel.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Environmental Sciences
Dawei Lan, Huiwen Zhu, Jianwen Zhang, Shuai Li, Quhan Chen, Chenxi Wang, Tao Wu, Mengxia Xu
Summary: This review compares various techniques for the removal of organic dyes in wastewater, with a focus on the latest developments in the use of porous materials. The characteristics, functionalization, and modification of different porous materials are discussed, along with a critical evaluation of the adsorption behavior and mechanism of these materials for the adsorption of organic dyes. Furthermore, challenges and opportunities for future research in the development of novel materials for highly efficient dye removal are proposed.
Article
Chemistry, Applied
Lingyuan Chen, Jiali Tang, Suoque Wu, Shixing Wang, Zhaogang Ren
Summary: A pyridine-modified chitosan (PMCS) adsorbent was prepared for the efficient adsorption of Au(III) from wastewater, demonstrating excellent adsorption performance, specific selectivity, and reusability. The adsorption capacity of PMCS for Au(III) was found to be high, and it showed selective adsorption even in the presence of multiple ions.
CARBOHYDRATE POLYMERS
(2022)
Article
Engineering, Electrical & Electronic
R. Ranjith, S. Ravikumar, V Pandiyan, Umamaheswari Rajaji, Khamael M. Abualnaja, Taghrid S. Alomar, Najla AlMasoud, Mohmed Ouladsmne
Summary: TiO2-Co3O4 and TiO2-Co3O4/graphene oxide nanocomposites were successfully prepared and utilized for the degradation of organic pollutants in this study. The GTC catalyst showed complete degradation of organic dyes under light irradiation, indicating a significant enhancement in photocatalytic activity compared to TC.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Biochemistry & Molecular Biology
Stephanie Giraldo, Irma Robles, Luis A. Godinez, Nancy Acelas, Elizabeth Florez
Summary: The study demonstrated that chemically treated orange peel materials have great potential for removing methylene blue from aqueous solutions, with the main adsorption mechanisms being electrostatic interactions, hydrogen bonding, and pi-pi interactions.
Article
Chemistry, Physical
Roxana Paz, Herlys Viltres, Nishesh Kumar Gupta, Carolina Leyva
Summary: The Ce-MOF@Fe3O4@activated carbon composite exhibited high removal efficiency of indigo carmine and methylene blue, reaching 97-98% at pH 7. The composite also showed stability and reusability, making it suitable for remediation of colored wastewater.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Environmental
Yongfeng Kang, Bingqian Zhang, Junjian Miao, Yingyuan Yu, Jianning Fu, Baiyun Jia, Li Li
Summary: In this study, a hydrothermal method assisted by ultrasound was used to create a superparamagnetic Fe3O4 @Al-MOF nanocomposite for the removal of Congo red (CR) dye from water. The results showed that Fe3O4 @Al-MOF efficiently removed CR within 10 minutes and reached equilibrium within 50 minutes, with a high adsorption capacity of 2543.6 mg/g. The adsorption mechanism involved electrostatic interaction, pi-pi interaction, hydrogen bonding, and high porosity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Ritesh Singh, Sravan Bokka, Annu Kumar Lakshya, Anirban Chowdhury
Summary: This study demonstrates the potential of CaO-doped ZrO2 nanoparticles as a dye adsorbent. Unlike previous research, this study shows that the doped-ZrO2 system alone can achieve maximum adsorption capacity for Congo red, with high surface area and rapid dye removal.
APPLIED SURFACE SCIENCE
(2022)