水溶液中铁与三氯乙醛的还原脱氯反应试验研究-河北工业科技.PDFVIP

25 1 河 北 工 业 科 技 V ol . 25, No . 1 200 8 1 H ebei J our nal of Indu str ial Science and T echno log y J an . 2008 1008- 1534( 2008) 0 1-00 12- 03 , , ( 河北工程大学理学院, 河北邯郸 056038) 针对零价铁可以有效清除工业废水中低浓度的有 氯化物, 在实验中考察了铁粉对三氯乙 醛的脱氯效果, 重点探讨了反应时间三氯乙醛质量浓度pH 值等因素对脱氯率的影响实验结 果表明, 还原铁粉对三氯乙醛有明显的脱氯作用, 脱氯率随三氯乙醛质量浓度的减小而增大, 随 pH 值的减小而增大, 随反应时间的增加而增大在厌氧条件下, 三氯乙醛质量浓度为51. 5 mg / L 和103 mg / L , 反应前p H = 2. 0 , 反应时间为3 h 时, 脱氯率可以分别达到70% 和6 1% 脱氯 理 主要是基于零价铁的还原作用 水溶液; 三氯乙醛; 零价铁; 还原脱氯 T Q224 . 13; X 786 A Stu dy on redu ctive dechlorinat ion of t richlor oacetadehy de by iron in w ater H E L e- qin, FEN G Ru- bing, CH EN Mei ( College o f Sciences, H ebei U niversity of Eng ineer ing, Handan H ebei 05603 8, China) Abstract: Recently, peo ple h ave realized th at zero- valent ir on can elim inate chlor inat ed org anic co mpo unds w ith low co ncent ra- t ion in the gr oundw ater , so t he dechlo rination o f chlo ral w ith ir on p articles in w at er w as stu died in the ex per im ent . T he eff ect s of the reactio n t im e, the concentr ation of chlo ral and the pH on dechlor inat ion w ere obtained, and the result s show ed th at the dechlo rinate eff ect w as obviou s. T he dechlor ination eff iciency of chlor al increased w ith the decr ease of the chlo ral co ncentration snf y hr pH and the increase of the neaction tim e. It w as f o und th at the dechlo rination eff iciency can go up to 70% and 6 1% , w hen the reactio n w as run under anaerobic conditio n f o r 3 hours ( p H = 2. 0) w ith the co ncentration s o f chloral at 5 1. 5 and 103 mg/ L r espectiv ely. T he m echanism of t he dechlor ination is b as