The concentrations of sodium dodecyl benzene sulfonate (SDBS), modification time and temperature were considered to be the specific factors that influence the SDBS-modified coal-based activated carbon (SCACs).carbon pellets manufacturer The superior properties of the SCACs were assessed through the adsorption amount of atrazine under same conditions. The adsorption capacity of optimal sample (SCAC-10) that the CAC was modified in 50 ml of 0.6 mmol/l SDBS aqueous solution for 10 min under microwave heating (MWH) is superior. Compared with the CAC sample, the acidic functional groups of the SCAC-10 sample were reduced, thereby resulting in the increasing pHpzc value, the pore volume and specific surface area, and the elemental analysis results exhibited the O/C ratio of the SCAC-10 sample decreased from 0.41 to 0.38, which is consistent with X-ray photoelectron spectroscopy analysis results. The kinetics of adsorption fitted with pseudo-second-order model perfectly, and the Langmuir model was suitable for the SCAC-10 samples with a maximum capacity of 222.22 mg/g. Results exhibited the modification of CAC by SDBS with MWH can effectively improve the adsorption capacity of the samples for atrazine.
•The adsorption capacity of optimal sample (SCAC-10) for atrazine is superior.
The pore volume and BET specifics surface area of the SCAC-10 became more.
The hydrophobic and π–π interactions help adsorption of atrazine onto SCAC-10.
The film diffusion controls the adsorption rate of atrazine onto SCAC-10.