Research on High-value Utilization of Waste Biomass under Carbon Peaking
CSAC was prepared from waste cotton straw through pyrolysis method at 500 ℃.The adsorption properties of methylene blue and acid fuchsin were studied.At the same time,ZnO/CSAC was prepared by hydrothermal method using CSAC as carrier,and its photocatalytic properties were preliminarily investigated.The results showed that at room temperature,the decolorization rates of 200 mg/L simulated methylene blue and acid fuchsin wastewater were 99.66％and 78.20％,respectively,at the dosage of 6 g/L and 25 g/L,and at the adsorption time of 60 min and 90min.The adsorption process of the two dyes conforms to the quasi-second-order kinetics,is controlled by chemisorption,and is exothermic.Under visible light irradiation,ZnO/CSAC dosage is 1 g/L,and the degradation rate of 200 mg/L methylene blue can reach 91.20％after 2 h.In ZnO/CSAC,nano-zno is assembled into spheroids in two-dimensional sheets and grows on the surface of CSAC,with more active reaction sites and good photocatalytic performance.
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