Abstract
Porous carbon material with high specific surface area was prepared from soybean dreg by a simple and effective two-step method (high temperature pyrolysis and activation). The structural characteristics of the synthesized carbon were evaluated by Brunauer–Emmett–Teller (BET), N2 adsorption/desorption measurements/techniques, an elemental analyzer (EA), scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEM-EDS), transmission electron microscopy (TEM), an X-ray diffractometer (XRD), Raman spectroscopy (Raman), a Fourier transform infrared spectrometer (FTIR), and X-ray photoelectron spectroscopy (XPS). The specific surface area of SDB-6-K was 2786 m2 g−1, the pore volume was 2.316 cm3 g−1, and the average pore size was 3.326 nm. The high specific surface area and effective functional groups of carbon material promoted the adsorption of methylene blue. The maximum adsorption capacity of SDB-6-K to methylene blue was 2636 mg g−1 at 318 K. The adsorption kinetic and isotherm data were most suitable for pseudo-second-order and Langmuir equations. The results showed that the adsorbent had excellent adsorptive ability and had good practical application potential in the field of dye wastewater treatment in the future.
Highlights
Organic dyes are widely used in food, textile, papermaking, pharmaceuticals, plastics, and cosmetics industries, and the discharge of dye wastewater has increased during the production and processing process as economies develop dramatically quickly [1]
The aim of this work was to study organic dye adsorption performance of porous carbon material with high specific surface area obtained from soybean dreg by pyrolysis and KOH activation
The adsorbents were characterized by Brunauer–Emmett–Teller (BET), N2 adsorption/desorption measurements/techniques, an elemental analyzer (EA), scanning electron microscopy equipped with energy dispersive X-ray spectroscopy (SEMEDS), transmission electron microscopy (TEM), an X-ray diffractometer (XRD), Raman spectroscopy (Raman), a Fourier transform infrared spectrometer (FTIR), and X-ray photoelectron spectroscopy (XPS)
Summary
Dye wastewater contains a variety of organic compounds, including phenyl, amino, azo, etc., has the characteristics of high toxicity, deep color, difficult biodegradation, strong photolysis, and oxidation resistance [2], and has become one of the main harmful industrial wastewaters [3]. Several common methods have been developed to remove these organic dyes, for instance, adsorption [5], chemical oxidation [6], photochemical degradation [7,8], and ultrasonic degradation [9], among which the adsorption method is one of the most valuable methods for research and application owing to its easy operation, environmental friendliness, low cost, lower energy consumption, superior stability, high efficiency, and so on [1,10]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
