ABSTRACT

The removal of phenol compounds (such as phenol (Ph), 4-chlorophenol (4-CPh), and 4-phenolsulfonic acid (4-APS)) was studied using catalytic ozonation and cerium oxide (CeO₂) as the catalyst. Conventional ozonation removes 40% and 30% of total organic carbon (TOC) for 4-CPh and 4-APS, respectively. The presence of the catalyst doubled the TOC removal in comparison with ozone alone. Chloride and sulfate ions, detached from the target compounds, did not affect the mineralization degree. The effect of ions was studied by adding NaCl and Na₂SO₄ during the ozonation of Ph with CeO₂ as a catalyst. The O₃-CeO₂ process was responsible for 89% TOC removal, while the presence of NaCl and Na₂SO₄ decreased TOC removal by nearly 50%. Ozonation alone only removed 20% of TOC at 120 min with or without inorganic salts. The presence of salts in the Ph ozonation provoked in detrimental effect in comparison when inorganic ions were produced along with the decomposition of 4-CPh and 4-APS.

摘要

使用催化臭氧化和氧化铈 (CeO ₂ ) 作为催化剂研究了酚类化合物（如苯酚 (Ph)、4-氯苯酚 (4-CPh) 和 4-苯酚磺酸 (4-APS)）的去除。对于 4-CPh 和 4-APS，传统的臭氧化作用分别去除了 40% 和 30% 的总有机碳 (TOC)。与单独的臭氧相比，催化剂的存在使 TOC 去除率翻了一番。与目标化合物分离的氯离子和硫酸根离子不影响矿化程度。在以CeO ₂为催化剂的Ph臭氧化过程中，通过加入NaCl和Na ₂ SO ₄研究了离子的影响。O ₃ -CeO ₂工艺负责 89% 的 TOC 去除，而 NaCl 和 Na 的存在₂ SO ₄使 TOC 去除率降低了近 50%。在 120 分钟内，无论是否使用无机盐，单独的臭氧化仅去除 20% 的 TOC。当无机离子随着 4-CPh 和 4-APS 的分解而产生时，Ph 臭氧化中盐的存在引起了不利影响。