硫酸改性粉煤灰对废水中直接大红4B染料的吸附研究

研究了用硫酸对粉煤灰进行改性及改性后的产品对废水中直接大红4B染料的吸附因素.结果表明,影响硫酸改性粉煤灰的因素主次顺序为:硫酸用量,活化温度,硫酸浓度,活化时间等.改性的最佳条件为:20℃时,用4 mol/L的硫酸对粉煤灰进行活化,硫酸与粉煤灰的液固比为1,活化时间为1 h;改性粉煤灰对废水中的直接大红4B染料在pH为6~7、吸附剂与染料废水的固液比为30:1000时,吸附率可达98%,其吸附机理为化学吸附.研究结果还表明改性粉煤灰可用作含直接大红4B染料废水的吸附剂.

Study on the Adsorpotion of the Directly Deep Red 4B Dyestuff on Powder Ash Changed by Sulfuric Acid

The some factor was studied that the powder ash was changed by the sulfuric acid and the directly deep red 4 B dyestuff in waste water was adsorbed by changed power ash.The result indicated that the influencing factors of changed powder ash by sulfuric acid from a primary and secondary order were Sulfuric acid dosage,activate temperature,concentration of sulfuric acid,Activate time.The better condition of changing power ash was 20℃,4 mol/L concentration of sulfuric acid,activate time 1h,a sulfuric acid(mL) and powder ash dosage(g) ratio 1.The suit condition of adsorption of the directly deep red 4 B dyestuff in waste water by changed powder ash was the pH 6～7,powder ash dosage(g) and waste water ratio 30 g:1000 mL,rate of adsorbing 98%.Its absorbing mechanism was adsorption of the chemistry.The powder ash changed could de used to the sorbent of directly deep red 4B dyestuff in waste water.