中文摘要：

用火法对粉煤灰进行改性处理，改性后粉煤灰的物理化学性质变化较大，新生矿物相有A型沸石和Na—P型沸石．通过正交实验，建立了最佳改性及处理含Cu^2＋废水的工艺条件：原状粉煤灰与Na2CO3质量比为1：2，NaOH浓度为1mol／L，固液比为1：5；2g改性粉煤灰对250mL浓度为20mg／L的Cu^2＋模拟废水的吸附率达97％．处理含Cr^6＋废水的最佳条件为：改性粉煤灰5g置于250mL浓度为3mg／L，pH=7的废水中，搅拌时间30min，对Cr^6＋吸附率达89．6％，处理后的废水Cr^6＋浓度为0．31mg／L，低于国家废水排放标准（0．5mg／L）．

英文摘要：

In the research of the phisico chemical properties and minerals composition, the physical property of modified flying ash changes. New mineral faces--A type and Na -P type zeolites exist there. The best modifying method for flying ash and the combination of treating Cu^2＋ -bearing waste water is carried out by orthogonal experiment to reveal that the ratio of flying ash to Na2 CO3 equals to 1 ： 2 （ mass fraction）, NaOH concentration is 1 mol/L, 2 g modified flying ash adsorption ratio can reach 97% for 250 mL Cu^2＋ concentration 20 mg/L. The best combination for Cr^6＋ concentration 3mg/L and pH =7 is 5 g modified flying ash with 30 min stirring for the waste water , with the adsorption ratio of Cr^6＋ 89.6%. The Cr^6＋ concentration after treating is 0.31 mg/ L, lower than the national standard for discharging （0. 5 mg/L）.