Pyridine and its derivatives are widely consumed and detected in the environment persistently, which can cause potential adverse impacts on environment and human health. Considering the fact that pyridine could absorb UV light at 254 nm to generate excited one, which could react with reductive radicals, promoting its structural changes, we proposed that one typical efficient advanced reduction process (ARP) which combines UV irradiation with sulfite could be used to eliminate pyridine quickly. Sulfite/UV process showed a higher pyridine removal rate with a pseudo-first-order reaction rate constant of 0.1439 min⁻¹, which was 3 times of that in UV irradiation and 1.3 times in UV/H₂O₂ process. This was primarily due to reductive radicals (e_aq^–, H^• and SO₃^•–) produced by UV irradiation. The removal rate of pyridine was highest in slightly alkaline environment. And the presence of oxygen, as well as certain concentration of humid acid just showed slight inhibition, indicating the possibility of application in practical environment. A positive impact was observed with increasing sulfite dosage, but it was gradually inhabited when the dosage was over 5 mM. The present study may provide an alternative efficient technology for the degradation of pyridine ring-containing substances.

吡啶及其衍生物在环境中被广泛消耗和持续检测，可能对环境和人类健康造成潜在的不利影响。考虑到吡啶可以吸收 254 nm 的紫外光产生激发态的物质，可以与还原性自由基反应，促进其结构变化，我们提出可以使用一种典型的将紫外线照射与亚硫酸盐相结合的高效高级还原工艺（ARP）快速消除吡啶。亚硫酸盐/UV工艺表现出更高的吡啶去除率，准一级反应速率常数为0.1439 min ^-1，是UV照射的3倍和UV/H ₂ O ₂工艺的1.3倍。这主要是由于还原自由基（e _aq^– , H ^•和 SO ₃ ^•– ) 由紫外线照射产生。吡啶的去除率在弱碱性环境中最高。而氧气的存在，以及一定浓度的湿酸，只是表现出轻微的抑制作用，表明在实际环境中应用的可能性。随着亚硫酸盐剂量的增加，观察到了积极的影响，但当剂量超过 5 mM 时，它会逐渐有人居住。本研究可为含吡啶环物质的降解提供一种替代的高效技术。