酿酒废弃葡萄皮渣对Cr(VI)的吸附能力研究

Adsorption of Cr(VI) in Solution by Abandoned Wine Grape Pomace

摘要:

利用酿酒后废弃葡萄皮渣（WGP）作为吸附剂，对溶液中六价铬离子Cr(VI)进行吸附试验，研究了吸附时间、粒径、用量、溶液pH、Cr离子浓度对吸附率的影响。结果如下：WGP对Cr(VI)的吸附4 h就基本达到平衡，吸附率为87.97%；粒径小于60目的WGP表现出更强的吸附能力；吸附率与WGP用量正相关，用量1 g以上吸附率趋于稳定在88%左右；WGP对Cr(VI)的吸附率随着pH值增加而下降，直至pH为3时，吸附率趋于平衡；溶液中Cr 浓度越高，葡萄皮渣对Cr(VI)的吸附率越高。研究表明：酿酒后葡萄皮渣具有较强吸附铬Cr(VI)的能力，可作为铬吸附剂，用于废水治理。

Abstract:

The abandoned wine grape pomace (WGP) was used as adsorbent to remove Cr(VI) in solution. The effects of adsorption time，particle size，WGP dosage, solution pH and Cr(VI) concentration on the adsorption were discussed. It was found that adsorption balance reached at 4 h and adsorption rate of Cr(VI) by WGP was 87.97%.WGP with particle size lager than 60 mesh showed the highest adsorption capability. Positive correlation was observed between adsorption rate and WGP dosage. The adsorption rate tended to peak (above 88%) when WGP dosage was above 1 g. Asorption rate of Cr(VI) by WGP decreased with the increase of solution pH till the pH value reached 3. The higher Cr(VI) concentration, the higher adsorption rate was found. It can be concluded that WGP was a kind of effective adsorbent with strong adsorption ability to Cr(VI).