The investigation of sorption–desorption performance and mechanism of copper by surfactant-modified zeolite in aqueous solutions

• Published in: Environmental science and pollution research international 2024-03, Vol.31 (15), p.22962-22975
• Main Authors: Zhang, Ziyang, Gao, Chenyu, Chen, Hongrui, Zhang, Xiaoran, Tan, Chaohong, Gong, Yongwei, Bai, Xiaojuan, Zhang, Yanfei, Li, Haiyan
• Format: Article
• Language: English
• Subjects: adsorbents; Adsorption; Aquatic Pollution; Aqueous solutions; Atmospheric Protection/Air Quality Control/Air Pollution; Cation exchange; Cation exchanging; Copper; Copper - chemistry; Desorption; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Heavy metals; hot water treatment; Hydrogen-Ion Concentration; Ionic strength; Kinetics; Leaching; Metals, Heavy; Pore size; porosity; Rain; Research Article; risk; runoff; Sodium dodecyl sulfate; Sodium lauryl sulfate; Solutions; Sorption; sorption isotherms; Stormwater; stormwater management; Surface-Active Agents; Waste Water Technology; Water Management; Water Pollution Control; Water Purification - methods; Water Supply; Zeolites; Zeolites - chemistry
• ISSN: 1614-7499; 0944-1344; 1614-7499
• DOI: 10.1007/s11356-024-32622-5

As the most common filler in stormwater treatment, zeolite (NZ-Y) has good cation exchange capability and stabilization potential for the removal of heavy metal from aqueous solutions. In this study, sodium dodecyl sulfate (SDS) and NZ-Y were selected to preparing new adsorbent (SDS-NZ) by using a simple hydrothermal method. The sorption–desorption performance and mechanism of Cu(II) onto SDS-NZ were investigated. The results showed that the sorption of Cu(II) on SDS-NZ was in accordance with the pseudo-second-order kinetic model with an equilibrium time of 4 h. The sorption behavior fitted Langmuir isotherm with a saturation sorption capability of 9.03 mg/g, which was three times higher than that of NZ-Y. The modification of SDS increases the average pore size of NZ-Y by 3.96 nm, which results in a richer internal pore structure and more useful sorption sites for Cu(II) sorption. There was a positive correlation between solution pH values and sorption capability of Cu(II) in the range of 3.0–6.0. With the ionic strength increased, the sorption capability of Cu(II) onto SDS-NZ first decreased and then increased, which may be attributed to competitive sorption and compression of the electronic layer. The desorption of Cu(II) on SDS-NZ was favored by the increase in SDS concentration and ionic strength and decrease in solution pH values. The application of SDS-NZ in runoff improved the leaching risk of Cu(II). After several cycles, the ability of reused SDS-NZ to efficiently adsorb most heavy metals was verified with removal rates above 99%. Graphical abstract