Novel modified semi-carbonized fiber prepared using discarded clothes for derisking Cu(II) and Pb(II) contaminated water

Hong-Yan Deng; Yin-Fei Wang; Meng-Ting Guo; Wen-Bin Li; Min Li; Chu-Tong Yu

doi:10.1016/j.jenvman.2023.119997

Novel modified semi-carbonized fiber prepared using discarded clothes for derisking Cu(II) and Pb(II) contaminated water

J Environ Manage. 2024 Feb:351:119997. doi: 10.1016/j.jenvman.2023.119997. Epub 2023 Dec 30.

Authors

Hong-Yan Deng¹, Yin-Fei Wang², Meng-Ting Guo¹, Wen-Bin Li³, Min Li⁴, Chu-Tong Yu¹

Affiliations

¹ College of Environmental Science and Engineering, China West Normal University, Nanchong, Sichuan, 637009, China.
² College of Chemical Engineering, Xinjiang University, Urumchi, Xinjiang, 830046, China.
³ College of Environmental Science and Engineering, China West Normal University, Nanchong, Sichuan, 637009, China; Key Laboratory of Nanchong City of Ecological Environment Protection and Pollution Prevention in Jialing River Basin, Nanchong, Sichuan, 637009, China. Electronic address: lwb062@163.com.
⁴ Key Laboratory of Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China.

PMID: 38160546
DOI: 10.1016/j.jenvman.2023.119997

Abstract

We report a novel modified semi-carbonized fiber (CF) prepared using cotton and acrylic clothes for derisking contaminated water to realize the resource utilization of discarded clothes in wastewater treatment. In this study, amphoteric and auxiliary modifiers were used to modify CFs for preparing amphoteric and amphoteric-auxiliary CFs. The basic physicochemical properties of different modified CFs were determined, and the microscopic morphology of modified CFs was detected. The isothermal adsorption characteristics of Cu(II) and Pb(II) on different modified CFs were investigated by the batch method, and the effect mechanisms of temperature, pH, ionic strength, and material dose were compared. Physicochemical properties and microscopic morphology results proved that amphoteric and auxiliary modifiers were modified on the CF surface and changed the surface properties of CF. The adsorption capacities of Cu(II) and Pb(II) on modified CFs increased with the increase in equilibrium concentration of Cu(II) and Pb(II), and the isotherm was more suitable for Freundlich model fitting than that of the Langmuir model. The maximum adsorption capacities (q_m) of Cu(II) and Pb(II) on different modified CFs were 60.72-81.26 mg/g and 102.58-161.72 mg/g, respectively, and presented the trend of amphoteric-auxiliary CFs > amphoteric CFs > CFs. Increasing pH and temperature and decreasing ionic strength and material dose were beneficial to Cu(II) and Pb(II) adsorption. The Cu(II) and Pb(II) adsorption process was a spontaneous, endothermic, and entropy-increasing reaction, and the adsorption rate was controlled by chemisorption. The adsorption amount of amphoteric-auxiliary CFs maintained about 65% of original materials after 3 times of regeneration. Electrostatic attraction, precipitation, complexation, and ion exchange were the main adsorption mechanisms. The cation exchange capacity and total pore volume of modified CFs were key to determining q_m of Cu(II) and Pb(II).

Keywords: Adsorption amount; Discarded clothes; Heavy metal ions; Modification; Semi-carbonized fiber.

MeSH terms

Adsorption
Cations
Clothing
Hydrogen-Ion Concentration
Kinetics
Lead*
Temperature
Water
Water Pollutants, Chemical* / chemistry

Substances

Lead
Cations
Water
Water Pollutants, Chemical