摘要
以抗生素原料中间体（7-ACA）废水为研究对象，天然沸石及改性沸石为吸附材料，考察了废水初始pH值、沸石粒径、沸石投加量、吸附时间及沸石酸、碱、盐改性对废水中CODcr和NH3-N去除效果的影响。单因素实验结果表明，天然沸石处理废水的适宜条件为：废水初始pn值7．5，沸石投加量20g/L，沸石粒径1--2mm，吸附时间150min。此条件下天然沸石对废水中CODc，和NI-13-N去除率分别为35．3％和23．O％。盐酸改性沸石对废水中CODc，和NH3-N去除效果明显优于氢氧化钠改性沸石和氯化钠改性沸石。1mol／L盐酸改性沸石投加量为15g／C，对废水中CODcr和NH3-N去除率均大于改性前，分别为48．4％和40％。
Natural zeolite and modified zeolite were used to treat 7-Aminocephalosporanic acid （7-ACA） wastewater. The effects of adsorption were investigated in different pH values, particle size, dosage, adsorption time, and acid, alkali and salt modification. The single factor result showed that the optimum conditions of natural zeolite were： particle size 1-2 mm, pH value 7.5, a dosage of 20 g/L, reaction time 150 min. The CODcr and NH3-N removal efficiencies were 35.3% and 23.0%. Natural zeolite modified by acid removing CODcr and NH3-N was better than that modified by alkali or salt. When the dosage of natural zeolite modified by 1 mol/L HCI was 15 g/L, the CODcr and NH3-N removal efficiencies were 48.4% and 40%, which was better than that of natural zeolite.
出处
《非金属矿》
CAS
CSCD
北大核心
2012年第5期69-71,78,共4页
Non-Metallic Mines
