两种方式再生硅碳素的试验研究

Test study on two ways of ANJ.SiC regeneration

采用水反冲洗再生和 NaOH 再生两种方式对吸附 Mn2＋饱和硅碳素（ANJ. SiC）进行动态再生，对比两种再生方式去除水中 Mn2＋的效果。结果表明：当原水 Mn2＋浓度范围为1.7~2.2mg/ L，流速为7.8m/ h 时，用水反冲洗第1次再生后，饱和硅碳素的再生率仅为49.8％，第2次再生后再生率就低于15％，失去了对 Mn2＋的去除能力；而用 NaOH 再生时，第5次再生后再生率仍大于1，明显优于反冲洗再生，并通过电镜扫描图像进一步研究硅碳素的除锰机理。

Regenerate the saturated ANJ.SiC with the adsorption of Mn2 +dynamically by backwash and NaOH,and compare the Mn2 +removing effect by the two ways.The result shows that on the condition of Mn2 +concentration in 1.7 ~ 2.2 mg /L,flowing speed at 7.8m /h,the regeneration rate of saturated ANJ.SiC is only 49.8% after the first regenerated by backwashing,for the second time,the rate is less than 15%,which has lost the Mn2 +removing ability;but by NaOH,the regeneration rate is more than 100% after the fifth regenerated,which is obviously better than the effect of backwashing.And conduct further study the Mn2 +removing mechanism by ANJ.SiC through SEM figures.