【作者】 权跃； 吴昊； 尹成日；

【Author】 Yue Quan;Hao Wu;Chengri Yin;Deparment of Chemistry,College of Science,Yanbian University;

【机构】 吉林省延吉市延边大学长白山生物资源教育部重点实验室；

【摘要】 粉煤灰（coal fly ashes,CFA）又称飞灰（fly ashes,FA）,是燃煤电厂粉煤燃烧排放的废弃物,粒径在1-500μm之间。我国目前每年排放的粉煤灰超过l亿吨,来源广泛,大部分被堆积废弃,由于粉煤灰质轻粒细,极易随风飞扬,随水漂浮,造成水土流失和环境污染,因此粉煤灰综合利用是当环境科学的重要研究课题。国内外研究表明,粉煤灰中含有较大的比表面积,具有较强的吸附能力,可应用于废水[1]、除草剂[2]和重金属[3]的吸附的处理。但由于粉煤灰吸附容量不高,对其进行改性,使其更适于废水处理就显得非常必要。因此本文以Na OH为改性剂,对粉煤灰进行改性处理,研究了改性后的粉煤灰对含Cu²⁺废水的吸附效果。探讨了投加量、吸附时间、pH值、含Cu²⁺废水初始浓度对去除率的影响。结果表明,吸附最佳条件为:室温25℃、震荡速率150 r/min,处理1 mg·L-1、50.0 m L含Cu²⁺废水,投加改性粉煤灰2.0000 g、pH8.0、吸附时间60.0 min、此时的去除率为98.79%。更多还原

【Abstract】 Fly ash is a relatively cheap and extremely abundant coal combustion by-product（CCB） and consists mostly of the unburned,mineral portion of coal.Fly ash was modifed with suitable modifer results not only in a clean-up of the surface impurities,but also increases the surface area by opening the available sites for biosorption.So in this study,fly ash was modified using sodium hydroxide to remove Cu²⁺ from aqueous,optimize the experimental conditions by static adsorption experiment.The optimal experimental conditions results showed:50.0 m L aqueous solutions of Cu²⁺,25℃,oscillation speed 150 rpm,the adsorbent dosage was 2.0000 g,adsorption time was 60 min,pH 8.0,the initial concentration of Cu²⁺ was 1 mg·L-1.The removal efficiencies（RE） was 98.79%,更多还原