摘要： 采取H₃PO₄活化制备玉米芯活性炭（CCAC）及玉米秸秆活性炭（CSAC），并对水中Cr（Ⅵ）进行去除。CCAC的最佳制备条件：取玉米芯10 g，按玉米芯与H₃PO₄质量比为1：2投加H₃PO₄，同时投加5% H₃BO₃ 10 mL，浸渍45 min，焙烧温度500℃，焙烧时间1 h。用CCAC和CSAC处理10 mg/L的Cr（Ⅵ）溶液，出水符合《生活饮用水卫生标准》（GB 5749-2006）和《城镇污水处理厂污染物排放标准》（GB 18918-2002）。BET和SEM分析表明CCAC表面有较多孔洞结构，CCAC的孔隙最发达，CSAC次之，CAC最少。

关键词: H₃PO₄活化, 玉米芯活性炭, Cr (Ⅵ)

Abstract: Corncob activated carbon(CCAC) and corn straw activated carbon(CSAC) have been prepared by H₃PO₄ activation method,and the removal of Cr(Ⅵ) in water has been implemented. The results show that the optimum con-ditions for CCAC preparation are as follows:the mass of corncob is 10 g,adding H₃PO₄ under conditions of m(corncob):m(H₃PO₄) 1:2,dipping time 45 min in 10 mL 5%H₃BO₃,sintering temperature 500℃,sintering time 1 h. 10 mg/L of Cr(Ⅵ) solution is to be treated with CCAC and CSAC. Thus,the effluent complies with the Standard for Drinking Water Quality(GB 5749-2006) and Discharge Standards of Pollutants for Municipal Wastewater Treatment Plants (GB 18918-2002). BET and SEM results indicate that CCAC surfaces have comparatively more porous structures, CCAC holes are the most developed,CSAC surfaces have less and CAC surfaces have the least.

Key words: H₃PO₄ activation method, corncob activated carbon, hexavalent chromium

中图分类号: 

• X703