摘要
为了探究废水中锰离子的去除效率,采集电解锰废渣,对其性质进行表征,并用去离子水连续淋洗电解锰废渣,研究改性沸石和改性活性炭的投加量、p H和反应时间等对淋洗液中锰离子的去除。结果表明,电解锰渣中的主要元素是O,占62.98%,其次是Si和S,分别占9.80%和9.42%,Mn仅占2.35%,其形状是长条柱状结构、其间夹杂着大量形态不规则的团聚状物质。连续淋洗液中锰离子浓度为189.68 mg/L,当改性沸石投加量为62.5 g/L、p H为4和时间30 min时,锰离子浓度降低到1.97 mg/L,且符合Langmuir和Freundlich吸附模型;当改性活性炭的投加量为237.5 g/L,p H为6和时间30 min时,锰离子的去除率为20.1%。尽管2种改性材料都能有效的去除淋洗液中锰离子,但改性沸石的去除效果明显比改性活性炭的好。
In order to research the manganese ion removal rate in wastewater, the electrolytic manganese residue was collected and its properties were characterized, and deionized water was used to leaching electrolytic manganese residue continuously. Meanwhile, the effects of modified activated carbon and zeolites dosage, pH and reaction time on manganese ion removal in leacheate. The results showed that, the main elements ofelectrolytic manganese residue was O with 62.98% content, followed by Si and S, accounting for 9.80% and 9.42%, respectively, Mn only accounted for 2.35%. The structure of them was long columnar, interspersed with a large number of irregular agglomerated materials. The concentration of manganese ion in leacheate was up to 189.68 mg/L, when modified zeolites dosage was 62.5 g/L, pH was 4 and reaction time was 30 rain, the concentration of manganese ion in leacheate decreased to 1.97 mg/L, and the adsorption process met the Langmuir and Freundlich adsorption model. When modified activated carbon was 162.5 g/L, pH was 6 and reaction time was 30 rain, the manganese ion removal rate was 20.1%. Although two modified materials could remove manganese ion in leacheate effectively, modified zeolite was significantly better than modified activated carbon.
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第7期76-80,88,共6页
Technology of Water Treatment
基金
国家自然科学基金项目(21007014)
关键词
改性沸石
改性活性炭
电解锰废渣
淋洗液
锰离子
吸附法
modified zeolites
modified activated carbon
electrolytic manganese residue
leacheate
manganese ions
adsorption
