干法腈纶废水中SO_3^(2-)的空气催化氧化性能研究  

Capability of Air Catalytic Oxidation for Sulfite in Dry-Acrylon Wastewater

作　　者：闫光绪[1] 杨小梅[1] 马学良[1] 

机构地区：[1]抚顺石油学院环境工程系,辽宁抚顺113001

出　　处：《石油化工高等学校学报》2002年第1期35-37,共3页Journal of Petrochemical Universities

摘　　要：对干法腈纶废水中SO2 -3 进行了直接空气氧化和空气催化氧化处理的对比试验 ,并研究了直接空气氧化、加入不同剂量Mn金属离子均相催化剂对腈纶废水中SO2 -3 去除率的影响。研究结果表明 ,当水温 80℃ ,空气流量为 0 .4L/min(压力 0 .2MPa) ,空气催化氧化处理与直接空气氧化处理对比 ,显著提高了对SO2 -3 的去除率 ,缩短了反应时间 ,使腈纶废水中的SO2 -3 浓度得到大幅度的降低。同时 ,催化氧化处理中 ,SO2 -3 去除率与Mn金属均相催化剂投加量、氧化反应时间之间存在着一定的相关性。增加催化剂投加量、延长氧化反应时间都将提高SO2 -3的去除率 ,但催化剂投加量增加到 6 0mg/L以上对进一步缩短反应时间和提高SO2 -3 去除率的效果并不明显。作为干法腈纶生产废水预处理措施 ,在Mn金属离子均相催化剂投加量为 4 0mg/L 。Comparative experiments between treating by direct air oxidation and air catalytic oxidation were made. Influence of direct air oxidation and air catalytic oxidation by adding various dosage of Mn transitional metal catalyst on removal rate of sulfite in acrylon wastewater has been studied. The experimental result shows that the removal ratio of sulfite has a remarkable increase, reaction time is shorter by air catalytic oxidation than that by direct air oxidation at water temperature T =80 ℃ and air flux Q =0.4 L/min(atmospheric pressure p =0.2 MPa). At the same time, there is relationship between removal ratio of sulfite and dosage of Mn transitional metal catalyst, oxidizing reaction time. Increasing dosage of transitional metal catalyst and extending reaction time can increase removal ratio in treating by air catalytic oxidation. But the effect on farther shortening reaction time and increasing removal ratio is not notable when dosage of catalyst is increased to 60 mg/L. As pretreatment step of dry- acrylon wastewater, there is a good result when dosage of catalyst is 40 mg/L and reaction time is 80 min.

关 键 词：干法腈纶 废水处理 SO3^2- 空气催化氧化 预处理 性能 亚硫酸盐 

分 类 号：X783.4[环境科学与工程—环境工程]