Natural Organic/inorganic Compound Preparation Of Porous Carbon To Purify Waste Water

To purify the industrial waste water, activated carbon adsorption method as one of the important methods is the current research hot spot. For the preparation of activated porous carbon, natural organic/inorganic composites has been chosen as raw material, through system research provides high-performance adsorbent for the purification of industrial waste water. The main research work includes two aspects.Firstly, natural organic/inorganic compound used to prepare porous carbon with fish scales (FHLC) is conducted. Compared to the commercial activated carbon (CGP), FHLC has larger specific surface area and better adsorption ability in the condition of different pH. In alkaline conditions of pH=11.00, the adsorption capacity of FHLC reached 1050.72 mg g-1, and in the neutral condition of pH=7.07, the adsorption capacity of 555.55 mg g-1 was obtained. It is also proved that FHLC can quickly remove large amount of MB from the aqueous solution of alkaline conditions and exhibit good efficiency. The process of the adsorption is according with the Langmuir isotherm adsorption model, and the dynamic fits pseudo-second-order kinetic model. As seen from the adsorption thermodynamics, the adsorption process is endothermic and spontaneous.Secondly, with abandoned pig bone as natural organic/inorganic compound to preparation of porous carbon, and then used to study the adsorption of Cr (VI) from the waste water. The adsorption behavior of Cr (VI) by BHPC in a single and binary system(Cr6+-Cl-, Cr6+-NO3-, Cr6+-Ni2+and Cr6+-Zn2+) have been researched. The results show that the adsorption of Cr (VI) by HPC decreases with the increasing of pH. In the condition of pH< 4, the influence of the cation in the binary system is more remarkable. The single and the whole binary systems(Cr6+-Cl-, Cr6+-NO3", Cr6+-Ni2+and Cr6+-Zn2+) meet the Langmuir isotherm adsorption model. The linear correlation coefficient R2 of the adsorption dynamics in all systems is above 0.99, reflecting a linear relationship, and fitting to the pseudo-second-order kinetic model. In conclusion, BHPC is expected to be an effective adsorption agent for removing Cr (VI) in waste water.