Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China.
Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China; Key Lab of Marine Environmental Science and Ecology (Ocean University of China), Ministry of Education, Qingdao, 266100, China.
Environ Res. 2024 Apr 15;247:118260. doi: 10.1016/j.envres.2024.118260. Epub 2024 Jan 23.
Tetracycline (TC) was widely used and frequently detected in various water bodies, where the presence of TC posed a significant threat to the health of aquatic organisms. Furthermore, antibiotics were hardly degraded by biological treatment. Thus, in order to enhance the removal of TC, we proposed the use of a novel ultraviolet/sodium percarbonate (UV/SPC) advanced oxidation process and initiated an in-depth study. The study investigated the influence of oxidant dosage, initial pH, UV intensity, and TC concentration on the removal of TC. The results demonstrated that the UV/SPC system efficiently removed TC, with removal efficiency increasing as the SPC concentration increased. Within the pH range of 3-11, TC degradation exhibited minimal variation, indicating the UV/SPC system's strong adaptability to pH variations. The research on the impact of the water matrix on TC removal revealed that HCO had an inhibitory effect on TC degradation, while NO promoted TC degradation. Additionally, the presence of free radical species (·OH, ·CO, ·O) were detected and rate constants for the secondary reactions (k = 6.3 × 10 L mol·s, k = 3.4 × 10 L mol·s) were calculated, indicating that ·OH exhibited a stronger oxidative performance compared to ·CO. This study did not only present a novel strategy via UV/SPC to remove TC but also uncovered the unique role of ·CO for contaminant removal.
四环素（TC）被广泛应用，且频繁出现在各种水体中，其存在对水生生物的健康构成了重大威胁。此外，抗生素很难通过生物处理进行降解。因此，为了提高 TC 的去除率，我们提出了一种新颖的紫外线/过碳酸钠（UV/SPC）高级氧化工艺，并对此进行了深入研究。该研究考察了氧化剂剂量、初始 pH 值、UV 强度和 TC 浓度对 TC 去除的影响。结果表明，UV/SPC 体系能有效去除 TC，且随着 SPC 浓度的增加，去除效率也随之提高。在 pH 值为 3-11 的范围内，TC 的降解变化不大，表明 UV/SPC 体系对 pH 值变化具有较强的适应性。关于水基质对 TC 去除影响的研究表明，HCO 对 TC 降解有抑制作用，而 NO 则促进了 TC 的降解。此外，还检测到了自由基（·OH、·CO、·O）的存在，并计算了二级反应的速率常数（k=6.3×10 L mol·s，k=3.4×10 L mol·s），表明·OH 比·CO 具有更强的氧化性能。本研究不仅提出了一种通过 UV/SPC 去除 TC 的新策略，还揭示了·CO 在污染物去除中的独特作用。
