CAJ | 학술논문

采用正硅酸乙酯(TEOS)代替传统的硅酸钠制备活性硅酸,将活性硅酸与聚合硫酸铁反应合成聚硅硫酸铁混凝剂,并研究了相关机理.由于正硅酸乙酯水解很缓慢,容易控制,可以得到重现性好的产物,有利于进行除藻性能的研究.通过正交实验等研究获得了聚硅硫酸铁的优化合成条件,即铁硅摩尔比为1.0,反应温度为50℃和反应时间为60 min.论文还研究了优化条件下合成的聚硅硫酸铁混凝剂除藻性能,得到除藻优化条件,即原水的pH值为11.0、预氧化剂的投加量为0.70 mg/L、聚硅硫酸铁的投加量为24.1 mg/L.
채용정규산을지(TEOS)대체전통적규산납제비활성규산,장활성규산여취합류산철반응합성취규류산철혼응제,병연구료상관궤리.유우정규산을지수해흔완만,용역공제,가이득도중현성호적산물,유리우진행제조성능적연구.통과정교실험등연구획득료취규류산철적우화합성조건,즉철규마이비위1.0,반응온도위50℃화반응시간위60 min.논문환연구료우화조건하합성적취규류산철혼응제제조성능,득도제조우화조건,즉원수적pH치위11.0、예양화제적투가량위0.70 mg/L、취규류산철적투가량위24.1 mg/L.
Poly-ferric silicate sulfate flocculants were prepared by using tetraethylorthosilicate and poly-ferric sulfate as raw materials. The relevant mechanism was studied. And it was found that since tetraethylorthosilicate had the characteristics of slow hydrolyzation, the reaction was easy to control. Thus, the products had a good repeatability, which was better for the study of algae removal. The optimum preparation conditions of poly-ferric silicate sulfate were determined by using orthogonal design, in which Fe/SiO_2 mole ratio was 1, polymeric temperature was 50℃ and polymeric time was 60 minutes. Furthermore, the optimum conditions of removals algae were determined as well, in which when the pH of raw waste water was 11.0, the dosage of PFSS prepared in the optimum condition was 24.1mg/L and the dosage of pre-oxidation was 0.7mg/L.