Temporal changes in thirdhand cigarette smoke film composition and oxidation of co-existing surface film chemicals
Temporal changes in thirdhand cigarette smoke film composition and oxidation of co-existing surface film chemicals
复制标题
DOI：
10.1039/d3ea00142c
复制
发表时间：
2024-03-14
期刊：
影响因子：
--
通讯作者：
Collins，Douglas B.
中科院分区：
文献类型：
--
作者：
Hurlock，April M.;Collins，Douglas B.
暴露在空气中的表面的组成可能对室内环境中的空气质量和化学品暴露产生强烈影响。三手烟（THS），包括表面沉积的香烟烟雾残留物沿着以及从这些残留物中释放的气体的收集，正日益被认为是长期烟草烟雾暴露的重要来源。虽然研究已经描述了气体/表面分配行为和一些涉及THS的多相反应系统，但由于沉积膜的内源性化学反应性而导致化学组成随时间变化的可能性还有待研究。在这项研究中，侧流香烟烟雾被允许存款在玻璃表面上，无论是干净的或预先涂有化学品，可能会被氧化的活性氧物质中发现的烟雾。表面膜包括低挥发性抗氧化剂三（2-羧乙基）膦（TCEP）和两种与建筑物内表面膜相关的化合物，油酸（OA）和角鲨烯（SQ）。沉积后，尼古丁、TCEP、OA和SQ的氧化产物在数小时至数周的时间内形成。因此，沉积为THS膜的香烟烟雾的固有氧化电位可以引发和维持氧化化学，在初始烟雾沉积后的长时间内转化表面膜的化学组成。THS氧化结果的解释提供了在其他类型的沉积颗粒空气污染物的背景下，已知的氧化电位，可能会被引入到室内环境。对室内发现的THS和沉积表面膜的继续研究应考虑这样的概念，即表面上发现的化学储层可能是反应性的，室内表面膜的化学成分可能是时间依赖性的，并且气溶胶颗粒的沉积可以作为引发表面膜氧化的机制。
The composition of air-exposed surfaces can have a strong impact on air quality and chemical exposure in the indoor environment. Third hand smoke (THS), which includes surface-deposited cigarette smoke residue along with the collection of gases evolved from such residues, is becoming increasingly recognized as an important source of long-term tobacco smoke exposure. While studies have described gas/surface partitioning behaviour and some multiphase reaction systems involving THS, the possibility of time-dependent changes in chemical composition due to chemical reactivity that is endogenous to the deposited film has yet to be investigated. In this study, sidestream cigarette smoke was allowed to deposit on glass surfaces that were either clean or pre-coated with chemicals that may be oxidized by reactive oxygen species found in the smoke. Surface films included a low volatility antioxidant, tris(2-carboxyethyl)phosphine (TCEP), and two compounds relevant to surface films found within buildings, oleic acid (OA) and squalene (SQ). Upon deposition, oxidation products of nicotine, TCEP, OA, and SQ were formed over time periods of hours to weeks. The inherent oxidative potential of cigarette smoke deposited as a THS film can therefore initiate and sustain oxidation chemistry, transforming the chemical composition of surface films over long periods of time after initial smoke deposition. An interpretation of the THS oxidation results is provided in the context of other types of deposited particulate air pollutants with known oxidative potential that may be introduced to indoor environments. Continued study of THS and deposited surface films found indoors should consider the concept that chemical reservoirs found on surfaces may be reactive, that the chemical composition of indoor surface films may be time-dependent, and that the deposition of aerosol particles can act as a mechanism to initiate oxidation in surface films.