Graphitic carbon nitride was investigated as an efficient and cheap catalyst for the degradation of a mixture of parabens through photo-aided processes. The ozone and g-C₃N₄ system was explored to obtain lacking necessary information regarding this combination for the proposed contaminants. The influence of key parameters was investigated to better understand the behavior of system and optimize it. Ultraviolet-A radiation promoted a more efficient activation of g-C₃N₄ compared to visible light. The photocatalytic ozonation process achieved higher parabens degradation rates and lower ozone consumption than the single technologies, reducing its overall cost. Basic and neutral conditions (pH = 7–11) promoted a better interaction between catalysts and contaminants, and radicals' formation. A catalyst concentration of 500 mg L⁻¹ and parabens concentration of 1 mg L⁻¹ resulted in >95 % removal of the three parabens within 15 min and with a lower transferred ozone dose required. Toxicity towards Allivibrio fischeri bacteria demonstrated a significant decrease in its luminescence inhibition after photocatalytic ozonation treatment, resulting in a non-toxic solution.

研究了石墨氮化碳作为通过光辅助过程降解对羟基苯甲酸酯混合物的有效且廉价的催化剂。对臭氧和 gC ₃ N ₄系统进行了探索，以获得有关拟议污染物的这种组合的必要信息。研究了关键参数的影响，以更好地了解系统的行为并对其进行优化。紫外-A辐射促进更有效的gC ₃ N _4活化与可见光相比。与单一技术相比，光催化臭氧化过程实现了更高的对羟基苯甲酸酯降解率和更低的臭氧消耗，从而降低了总体成本。碱性和中性条件（pH = 7–11）促进了催化剂和污染物之间更好的相互作用以及自由基的形成。500 mg L ^{-1的催化剂浓度和 1 mg L -1}的对羟基苯甲酸酯浓度导致在 15 分钟内三种对羟基苯甲酸酯的去除率 > 95%，并且所需的转移臭氧剂量更低。对Allivibrio fischeri细菌的毒性表明，光催化臭氧化处理后其发光抑制显着降低，从而产生无毒溶液。