The degradation of phenol in water in Al-O2-acid system was investigated.The experiments showed that under the conditions of ρ(A1)=4 g/L,ρ(dissolved oxygen)=9.08 mg/L and pH=2,20 mg/L phenol was degraded for 5 h,and the removal rate could reach 99.71％.Methylene blue was used as the trapping agent for·OH,and the production process of OH was indirectly determined by spectrophotometry,and the concentration of H2O2 was determined by DMP(2,9-dimethyl-1,10-phenanthroline)spectrophotometer.Al-O2-acid system is an Al-mediated process,wherein the Al0(zero-valent aluminum)induces·OH,and then oxidizes phenol.The increase and decrease trends of H2O2 are consistent with the determined concentration of·OH and the degradation trend of phenol.The degradation of phenol in the Al-O2-acid system was clearly pH-dependent and followed pseudo-first-order kinetics.Under the test conditions,the apparent activation energy of phenol degradation was 74.49 kJ/mol.The Al-O2-acid system is efficient and cost-effective,and has a promising application prospect in the degradation of phenol-containing wastewater.
NETL
NSTL
万方数据
