还原剂硫酸盐处理锰废水的研究.pdfVIP

学兔兔 《自动化与仪器仪表}2014年4期(总第174期) 还原剂硫酸盐处理锰废水的研究 史可忠 (兰州石4gg~,,_Ik技术学院 兰州，730300) 摘 要：通过静态吸附试验研究了还原剂硫酸盐对废水中Mri+的吸附性能，对还原剂在溶液不同投加量、pH值、初始 浓度及不同反应时间下进行Fe2 、Mn2+去除特性研究，得出最佳反应条件为：当pH值为9—11时，去除率达96．59％；加投含 量为300mg·L一1时，当聚合硫酸铝投加量为600mg-L-1时处理效果最好，去除率达97．22％；当废水中锰初始浓度为 O．2298mg·L-1时，处理后其浓度降至0．0424mg·L一1，去除率为81．55％；当初始浓度为2．2978mg-L一1时，水中剩余锰浓度 为0．145lmg-L一1，去除率为93．68％；随着吸附时间延长，Mn2 去除率提高，超过80min后提高幅度变缓，吸附过程符合二级动 力学模型。还原剂 (PAS)具有较好的铁锰去除能力，该研究成果可为采用生物法处理AMD提供一定的参考依据。 关键词：硫酸盐还原菌 (PAS)；铁锰废水；铁锰去除率；影响因素 Abstract：We have study the adsorption property of isolation ofpoly alumirlillm sulfate Mn2+in wastewater by the static exper— iment，And investigate the influence of initial concentration、pH value、dosage、oscillation intensity and carbon sulfur．The results show that PAS have excellent effect on disposing manganese，the removing rate is up to 96．59％；The dosage of lime milk is 300mg／ L have the best result when the dosage ofPAS is 600 mg·L一1，the removing rate is 97．22％；the initial concentration ofmanganese is 0．2298 mg‘L-1，the concentration is 0．0424mg／L after disposing，the removing rate is 81．55％；the initial concentration is 2．2978 mg-L一1，the residual concentration is 0．1451 mg·L一1，the removing rate is 93．68％；With the extension ofadsorption time，the re— moval rate of Mn2+is enhanced．and it becomes slow after 80 rain．The adsorption process complied with the secondary adsorption kinetics mode 1 00 r／min of shock strength 2／1 of COD／so3o一 So the PAS has the be~er removal performance to Fe moval perfor- ． mance to Fe 、M ．This result can provide a certain reference for AMD treated by biological method． Key words