Direct and indirect photodegradation in aquatic systems mitigates photosensitized toxicity in screening-level substance risk assessments of selected petrochemical structures.

光降解 石油化工 环境化学 环境科学 化学 环境卫生 环境工程 光催化 有机化学 医学 催化作用
作者
Davide Vione,J. Samuel Arey,Thomas F. Parkerton,Aaron D. Redman
出处
期刊:Water Research [Elsevier BV]
卷期号:: 121677-121677
标识
DOI:10.1016/j.watres.2024.121677
摘要

Photochemical processes are typically not incorporated in screening-level substance risk assessments due to the complexity of modeling sunlight co-exposures and resulting interactions on environmental fate and effects. However, for many substances, sunlight exerts a profound influence on environmental degradation rates and ecotoxicities. Recent modeling advances provide an improved technical basis for estimating the effect of sunlight in modulating both substance exposure and toxicity in the aquatic environment. Screening model simulations were performed for 25 petrochemical structures with varied uses and environmental fate properties. Model predictions were evaluated by comparing the ratios of predicted exposure concentrations with and without light to the corresponding ratios of toxicity thresholds under the same conditions. The relative ratios of exposure and hazard in light vs. dark were then used to evaluate how inclusion of light modulates substance risk analysis. Results indicated that inclusion of light reduced PECs by factors ranging from 1.1- to 63-fold as a result of photodegradation, while reducing PNECs by factors ranging from 1- to 49-fold due to photoenhanced toxicity caused by photosensitization. Consequently, the presence of light altered risk quotients by factors that ranged from 0.1- to 17-fold, since the predicted increase in substance hazard was mitigated by the reduction in exposure. For many structures, indirect photodegradation decreases environmental exposures independently of the direct photolysis pathway which is associated with enhanced phototoxicity. For most of the scenarios and chemicals in the present work, photosensitization appears to be mitigated by direct and indirect degradation from sunlight exposure.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
科研通AI2S应助感动黄豆采纳,获得10
4秒前
8秒前
9秒前
12秒前
Fengliguantou发布了新的文献求助10
12秒前
猪猪hero发布了新的文献求助10
14秒前
Winner发布了新的文献求助10
16秒前
隐形曼青应助科研通管家采纳,获得10
16秒前
领导范儿应助科研通管家采纳,获得10
16秒前
Lucas应助科研通管家采纳,获得30
17秒前
17秒前
圆锥香蕉应助科研通管家采纳,获得20
17秒前
科研通AI2S应助科研通管家采纳,获得10
17秒前
科研通AI2S应助科研通管家采纳,获得10
17秒前
科目三应助科研通管家采纳,获得10
17秒前
充电宝应助科研通管家采纳,获得10
17秒前
脑洞疼应助科研通管家采纳,获得10
17秒前
科研通AI5应助科研通管家采纳,获得10
17秒前
852应助科研通管家采纳,获得10
17秒前
科研通AI2S应助科研通管家采纳,获得10
17秒前
科研通AI2S应助科研通管家采纳,获得10
17秒前
情怀应助科研通管家采纳,获得10
18秒前
18秒前
感动黄豆发布了新的文献求助10
18秒前
21秒前
搞怪冷风完成签到,获得积分10
22秒前
lucky完成签到,获得积分10
22秒前
量子星尘发布了新的文献求助10
23秒前
25秒前
科目三应助战斗暴龙兽采纳,获得10
29秒前
29秒前
29秒前
30秒前
30秒前
33秒前
故意的靳发布了新的文献求助50
34秒前
111111完成签到,获得积分10
34秒前
郭小宝发布了新的文献求助20
36秒前
youwenjing11发布了新的文献求助10
37秒前
hello发布了新的文献求助10
37秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989115
求助须知:如何正确求助?哪些是违规求助? 3531367
关于积分的说明 11253688
捐赠科研通 3269986
什么是DOI,文献DOI怎么找? 1804868
邀请新用户注册赠送积分活动 882078
科研通“疑难数据库(出版商)”最低求助积分说明 809105