标题: Interaction between graphene oxide and acetaminophen in water under simulated sunlight: Implications for environmental photochemistry of PPCPs

作者: Zou, YR (Zou, Yongrong); Wang, WY (Wang, Wenyu); Wang, H (Wang, Hao); Pan, C (Pan, Cong); Xu, J (Xu, Jing); Pozdnyakov, IP (Pozdnyakov, Ivan P.); Wu, F (Wu, Feng); Li, JJ (Li, Jinjun)

来源出版物: WATER RESEARCH 卷: 228 文献号: 119364 DOI: 10.1016/j.watres.2022.119364 子辑: A 出版年: JAN 1 2023

摘要: In recent years, graphene oxide (GO) as a new carbon material has been widely investigated as adsorbent and catalyst. However, effects of GO on the micro-pollutants such as pharmaceuticals and personal care products (PPCPs) under sunlight remains unclear. In this study, the degradation of PPCPs in a simulated sunlight-GO photocatalytic system was systematically investigated. Specifically, GO rapidly degrade 95% of acetaminophen (APAP) within 10 min under simulated sunlight irradiation (lambda >= 350 nm). The influencing factors such as APAP concentration, pH, GO dosage, water matrixes (Cl-, NO3-, HCO3-, SO42-, Ca2+, Fe3+ and fulvic acid) were investigated. At a GO dosage of 100 mg L-1 and an initial pH of 7, the APAP (5 mu M) photodegradation kinetic constant k(obs) was calculated to be 0.4547 min(-1). In practical applications, the GO photocatalysis system still degrade over 90% APAP within 60 min in real surface water. The electron spin resonance and radical scavenging experiments revealed that the dominated active species for degrading APAP was photogenerated holes (h(+)), while other mechanisms (O-1(2) and O-2(center dot-)/HO2 center dot) played a minor role. Furthermore, the photochemical transformation of some other typical PPCPs were comparatively studied to reveal the relationship between degradation kinetics and molecular structure. Based on descriptive variables including molar refractive index parameter, octanol-water partition coefficient, dissociation constant and dipole moment, a quantitative structural-activity relationship (QSAR) model for predicting pseudo-first-order rate constants was established with a high significance (R-2 = 0.996, p < 0.05). This study helps to understand the interaction between GO and PPCPs and its effects on the photochemical transformation of PPCPs in water.

作者关键词: Graphene oxide; Simulated sunlight; Photooxidation of PPCPs; Photochemical transformation; QSAR

地址: [Zou, Yongrong; Wang, Wenyu; Wang, Hao; Pan, Cong; Wu, Feng; Li, Jinjun] Wuhan Univ, Sch Resources & Environm Sci, Hubei Key Lab Biomass Resource Chem & Environm Bio, Wuhan 430079, Peoples R China.

[Xu, Jing] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn Sc, Wuhan 430072, Peoples R China.

[Xu, Jing] Wuhan Univ, Hubei Key Lab Water Syst Sci Sponge City Construct, Wuhan 430072, Peoples R China.

[Pozdnyakov, Ivan P.] VV Voevodsky Inst Chem Kinet & Combust, 3 Ins Skaya Str, Novosibirsk 630090, Russia.

[Pozdnyakov, Ivan P.] Novosibirsk State Univ, 2 Pirogova St, Novosibirsk 630090, Russia.

通讯作者地址: Li, JJ (通讯作者)，Wuhan Univ, Sch Resources & Environm Sci, Hubei Key Lab Biomass Resource Chem & Environm Bio, Wuhan 430079, Peoples R China.

Xu, J (通讯作者)，Wuhan Univ, State Key Lab Water Resources & Hydropower Engn Sc, Wuhan 430072, Peoples R China.

Xu, J (通讯作者)，Wuhan Univ, Hubei Key Lab Water Syst Sci Sponge City Construct, Wuhan 430072, Peoples R China.

电子邮件地址: jingxu0506@whu.edu.cn; lijinjun@whu.edu.cn

影响因子：13.4