Preparation Of Activated Carbon Starch From New Inverse Emulsion Method And Its Adsorption Performance

A new porous starch was synthesized in a microwave-assisted which replace water bath with native potato starch (PS) as a raw material, MBA as a crosslinker, and K2S2O8-NaHSO3 as oxidizing agent and reducing agent of initiating system. Adsorption capacity of porous starch as response variable and microwave power, cyclohexane volume, quantity of dispersant, stirring speed and quantity of crosslinker were set as independent variables of single factor experiments and orthogonal experiments.The results showed that as the microwave power, cyclohexane volume, quantity of dispersant, stirring speed and quantity of crosslinker increased, the adsorption capacity of porous starch increased first, then decreased. Among them, dispersant quantity, cyclohexane volume and microwave power have significant impact on adsorption. The optimum polymerization conditions were:1.1g dispersant quantity,240W microwave power,250 mL cyclohexane volume,2000rad/min stirring speed and 0.6 g MBA.Using Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Specific surface area analyzer (BET) and X-ray photoelectron spectroscopy (XPS) we have carried out the detailed analysis research on the structure and performance of PS and porous starch. The results showed:The cross-linking reaction happened not only surface of the granule but also between granules, therefore ACLS was bulk rather than powder which has a large degree of crosslinking and form a new granule with large cavity; the porous starch has the remarkable characteristic of a second acrylamide after cross-linking reaction; massive ACLS was ground into 60,100 and 200 mesh, isothermal adsorption of porous starch was investigated with methylene blue solution (MB), the adsorption process of ACLS were adapted to Langmuir adsorption isotherm equation. The maximum adsorption of 200 mesh ACLS were 188.679 at 298K. The adsorption fitted Pseudo-second-order kinetic model well, it conclude that the adsorption is the chemical adsorption.