活性炭负载铈催化臭氧处理桉木制浆废水  

Catalytic Ozonation of Eucalyptus Pulping Effluent by Cerium Loaded on Activated Carbon

作　　者：何帅明 莫立焕[1] 徐峻[1] 李军[1] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《中国造纸》2016年第3期1-6,共6页China Pulp & Paper

基　　金：国家水体污染治理与控制科技重大专项(2014ZX-07213001);制浆造纸工程国家重点实验室开放基金(201356)

摘　　要：通过浸渍法在活性炭(AC)上负载铈(Ce)制备了催化剂(Ce-AC),并用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和比表面积分析仪(BET)对制备的催化剂进行表征,研究了该催化剂催化臭氧处理桉木制浆废水对CODCr和色度的去除效果。结果表明,Ce以CeO_2晶型的形式负载在AC上;Ce负载量为1.0%时,Ce-AC催化臭氧处理桉木制浆废水效果最好;当反应30 min时,废水的色度和CODCr去除率达到95%和55%,分别比单独臭氧氧化过程提高10个和18个百分点,比AC催化臭氧氧化过程提高5个和12个百分点;Ce-AC催化臭氧处理桉木制浆废水极大地提高了对废水CODCr的去除率。动力学分析表明,单独臭氧氧化及AC、Ce-AC催化臭氧处理制浆废水的过程中,CODCr降解的反应符合表观二级动力学方程,负载的Ce提高了反应的动力学速率常数。In this work,Ce-loaded activated carbon（ Ce-AC） was prepared and used as catalyst to promote COD and color removal rates of eucalyptus pulping effluent by ozone. The prepared Ce-AC was characterized by XRD,SEM and BET. Results indicated that cerium of CeAC existed in the form of CeO_2. The best catalytic ozonation effect was found when cerium loading content was 1. 0%,color and CODCrremoval rates were up to 95% and 55% respectively when reaction time 30 minutes,compared with ozonation treatment alone,color and CODCrremoval rates increased by 10 and 18 percentage points respectively using 1. 0% Ce-AC catalytic ozonation; under the same reaction conditions; compared with using AC,using 1. 0% Ce-AC as catalyst color and CODCrremoval rates increased by 5 and 12 percentage points respectively. The CODCrremoval rate of eucalyptus pulping effluent was greatly increased by Ce-AC catalytic ozonation. Kinetics analyses showed that CODCrdegradation followed apparent second-order kinetic equation,and Ce loading on AC increased the reaction rate constant.

关 键 词：制浆废水 臭氧 催化 活性炭 铈 

分 类 号：X793[环境科学与工程—环境工程]