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Chen S, Wen H, Zheng T, Liu X, Wang Z, Tian S, Fan H, Chen Y, Zhao H, Wang Y. Engineering sodium alginate-SiO2 composite beads for efficient removal of methylene blue from water. Int J Biol Macromol 2023; 239:124279. [PMID: 37011753 DOI: 10.1016/j.ijbiomac.2023.124279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/05/2023] [Accepted: 03/28/2023] [Indexed: 04/04/2023]
Abstract
The lack of sufficient active binding sites in commonly reported sodium alginate (SA)-based porous beads hampers their performances in adsorption of water contaminants. To address this problem, porous SA-SiO2 beads functionalized with poly(2-acrylamido-2-methylpropane sulfonic acid) (PAMPS) are reported in this work. Due to the porous properties and the existence of abundant sulfonate groups, the obtained composite material SA-SiO2-PAMPS shows excellent adsorption capacity toward cationic dye methylene blue (MB). The adsorption kinetic and adsorption isotherm studies reveal that the adsorption process fits closely to pseudo-second-order kinetic model and Langmuir isotherm model, respectively, suggesting the existence of chemical adsorption and monolayer adsorption behavior. The maximum adsorption capacity obtained from Langmuir model is found to be 427.36, 495.05, and 564.97 mg/g under 25, 35, and 45 °C, respectively. The calculated thermodynamic parameters indicate that MB adsorption on SA-SiO2-PAMPS is spontaneous and endothermic.
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Affiliation(s)
- Siyu Chen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Huimin Wen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Tanghao Zheng
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Xuhai Liu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Ziquan Wang
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Shilin Tian
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Hao Fan
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Yingjie Chen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Huaixia Zhao
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China.
| | - Yangxin Wang
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, PR China.
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