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| Catalytic Ozonation of Eucalyptus Pulping Effluent by Cerium Loaded on Activated Carbon |
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| DOI：10.11980/j.issn.0254-508X.2016.03.001 |
| Key Words:pulping effluent ozone catalysis activated carbon cerium |
| Fund Project: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)。 |
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| Abstract: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 Ce-AC existed in the form of CeO2. The best catalytic ozonation effect was found when cerium loading content was 1.0%, color and CODCr removal rates were up to 95% and 55% respectively when reaction time 30 minutes, compared with ozonation treatment alone, color and CODCr removal 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 CODCr removal rates increased by 5 and 12 percentage points respectively. The CODCr removal 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. |
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