voltage and 2.0k and 5.0k magnification. The thermogravimetric (TG) profiles were obtained by using a Netzsch STA449F3 (Germany). Measurements were collected under a nitrogen atmosphere in a temperature range of 35°C–600°C at a heating rate of 10°C/min.Adsorption studySNE was dissolved in deionized water to the required concentrations, and the adsorption experiments were carried out in batches of 50-mL conical flasks containing a specific amount of CCS and 20mL of SNE solution in a shaking bath. After shaking for a definite time, CCS was removed by extraction filtration, and the concentrations of the SNE in solution after adsorption were analyzed by a ThermoFisher Scientific ultraviolet–visible spectrophotometer (US). The removal rate (RE) of SNE by CCS was determined as follows