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采用双氧水对活性炭进行了表面改性,以改性活性炭为载体,添加活性组分后制备成浸渍炭,考察了双氧水浓度、氧化时间及氧化温度对浸渍炭防护氯化氰的性能影响。采用Zeta电位滴定对氧化前后样品进行了表征分析。研究发现双氧水氧化改性可降低活性炭的等电点,增加活性炭表面酸性官能团,从而提高活性炭的表面亲水性。其中浸渍炭对氯化氰的防护时间受双氧水浓度和氧化时间影响较小,受氧化温度影响最大,当双氧水浓度为5%,氧化时间为3.5h,氧化温度为B℃时制备的浸渍炭对氯化氰的防护效果最好,防护时间高达34.9min。
The activated carbon was modified by hydrogen peroxide. The modified activated carbon was used as the carrier. The activated carbon was used as the carrier to prepare impregnated carbon. The effects of hydrogen peroxide concentration, oxidation time and oxidation temperature on the properties of cyanogen chloride in protecting carbonitride were investigated. Zeta potential titration was used to characterize the samples before and after oxidation. It was found that the oxidative modification of hydrogen peroxide can reduce the isoelectric point of activated carbon and increase the acidic functional groups on the surface of activated carbon so as to improve the surface hydrophilicity of activated carbon. The impregnation charcoal has a less effect on the protection of cyanogen chloride by the concentration of hydrogen peroxide and the oxidation time, and is most affected by the oxidation temperature. When the concentration of hydrogen peroxide is 5%, the oxidation time is 3.5h and the oxidation temperature is B ℃, Cyanide protective effect of the best protection time up to 34.9min.