ENVIRONMENTAL POLLUTION
·
2019
·
IF 5.714
Rui Hou,Xiaoshan Luo,Chuangchuang Liu,Lihua Zhou,Junlin Wen,Yong Yuan
Triphenyl phosphate (TPHP) is one of the major organophosphate esters (OPEs) with increasing consumption. Considering its largely distribution and high toxicity in aquatic environment, it is important to explore an efficient treatment for TPHP. This study aimed to investigate the accelerated degradation of TPHP in a three-electrode single chamber bioelectrochemical system (BES). Significant increase of degradation efficiency of TPHP in the BES was observed compared with open circuit and abiotic controls. The one-order degradation rates of TPHP (1.5 mg L −1 ) were increased with elevating sodium acetate concentrations and showed the highest value (0.054 ± 0.010 h −1 ) in 1.0 g L −1 of sodium acetate. This result indicated bacterial metabolism of TPHP was enhanced by the application of micro-electrical field and addition acetate as co-substrates. TPHP could be degraded into diphenyl phosphate (DPHP), hydroxyl triphenyl phosphate (OH-TPHP) and three byproducts. DPHP was the most accumulated degradation product in BES, which accounted more than 35.5% of the initial TPHP. The composition of bacterial community in BES electrode was affected by the acclimation by TPHP, with the most dominant bacteria of Azospirillum , Petrimonas , Pseudomonas and Geobacter at the genera level. Moreover, it was found that the acute toxic effect of TPHP to Vibrio fischeri was largely removed after the treatment, which revealed that BES is a promising technology to remove TPHP threaten in aquatic environment.
研究领域:
环境工程
·
生物技术
·
微生物学
·
水处理
✓ 已验证
DOI
PubMed
高影响因子
3 Biotech
·
2021
·Vol. 11
·期 4
·1-9
·
IF 2.406
Ren Runxian,Zhai Lixin,Tian Qiaopeng,Meng Di,Guan Zhengbin,Cai Yujie,Liao Xiangru
Diphenyl phosphate (DPHP) has been increasingly detected in environmental samples, posing a potential hazard to humans and other organisms and arousing concern regarding its adverse effects. Biological degradation of DPHP is considered a promising and environmentally friendly method for its removal. In this study, the bagdpd gene was mined from the Bacillus altitudinis W3 genome and identified as a glycerophosphodiester phosphodiesterase by bioinformatics analysis. The enzyme was expressed and its biochemical properties were studied. When using bis(4-nitrophenyl) phosphate as substrate, enzyme activity was optimal at 55 °C and a pH of 8.5. The enzyme remained stable in the pH range of 8.0 − 10.0. The rBaGDPD enzyme degraded DPHP and the reaction product was identified as phenyl phosphate by LC–MS. This is the first report of a glycerophosphodiester phosphodiesterase exhibiting hydrolytic activity against DPHP. This study demonstrated that rBaGDPD could have the potential for bioremediation and industrial applications.
研究领域:
环境科学
·
微生物学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Su-chun Wang,Zhi-yin Gao,Fei-fei Liu,Shi-qiang Chen,Guang-zhou Liu
The toxicity of microplastics to marine organisms has attracted much attention; however, studies of their effects on marine microalgae remain limited. Here, the effects of the single and combined toxicity of polystyrene (PS) and triphenyl phosphate (TPhP) on the cell growth, photosynthesis, and oxidative stress of Chaetoceros meülleri were investigated. PS inhibited growth of the algae cells and caused a dose-dependent effect on oxidative stress. The significantly high production of reactive oxygen species (ROS) induced severe cell membrane damage, as confirmed by high fluorescence polarization. However, there was no obvious decrease in chlorophyll a content, and 80 mg/L of PS significantly promoted chlorophyll a synthesis. The TPhP also inhibited cell growth, except at low concentrations (0.2–0.8 mg/L), which stimulated algae growth over 48 h. Moreover, no obvious decrease in chlorophyll a and maximal photochemical efficiency of PSII was found in the TPhP experimental groups except for 3.2 mg/L TPhP, where the rapid light curves showed a significantly reduced photosynthetic capacity of algae. In addition, TPhP caused high ROS levels at 96 h, resulting in cell membrane damage. Using the additive index and independent action methods, the combined toxic effects of PS and TPhP on the algae were evaluated as antagonistic; however, cell membrane damage caused by high ROS levels was still noticeable. This study has shown the potential toxicity of PS and TPhP to marine microalgae, and provided insights into the combined risk assessment of TPhP and microplastics in the marine environment.
研究领域:
海洋生物学
·
环境毒理学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Wei Wang,Shubo Deng,Lu Ren,Danyang Li,Wenjing Wang,Mohammadtaghi Vakili,Bin Wang,Jun Huang,Yujue Wang,Gang Yu
A critical challenge in environmental remediation is the design of adsorbents with proper pore size for the removal of organic pollutants. Three covalent organic frameworks (COFs) with different pore sizes were successfully prepared by a room-temperature solution–suspension method and used to remove a typical aryl-organophosphorus flame retardant [triphenyl phosphate (TPhP)] from aqueous solution. The prepared COFs showed strong acid resistance and thermal stability. The 1,3,5-triformylphloroglucinol (TFP) reacted with benzidine (BD) (COF2) and exhibited the highest sorption capacity for TPhP, followed by the reaction of TFP and 4,4″-diamino-p-terphenyl (DT) (COF3), and the reaction of TFP and p-phenylenediamine (COF1). Their adsorption equilibriums were achieved within 12 h, and COFs with a larger pore size have higher initial sorption rate but longer time to reach sorption equilibrium. According to the Langmuir fitting, the maximum sorption capacities of three COFs for TPhP were 86.1, 387.2, and 371.2 mg/g, respectively. The density functional theory calculation verified that COF1 with a small pore size prevents TPhP molecules from entering the pores, resulting in extremely low sorption capacity, whereas a relatively too large pore size (COF3) will decrease the sorption energy, which is also not conducive to the adsorption of TPhP. Moreover, the prepared COFs can selectively adsorb TPhP in the presence of coexisting compounds and had high removal of TPhP from actual municipal wastewater, showing a promising application potential for selective removal of micropollutants from water by precisely controlling the COF structure.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2020
·
IF 6.793
Mengjie Hao,Pan Gao,Dian Yang,Xuanjin Chen,Feng Xiao,Shaoxia Yang
The emergence of organophosphorus flame retardants and the efficient removal from aquatic environments have aroused increasing concerns. The Urea functionalized Fe 3 O 4 @LDH (Urea-Fe 3 O 4 @LDH) was prepared and used to adsorb triphenyl phosphate (tphp) for the first time. The tphp adsorption capacity was up to 589 mg g −1 , and the adsorption rate reached 49.9 mg g −1 min −1 . Moreover, the influences of various environmental factors (pH, ionic strength and organic matter) on the tphp adsorption on the Urea-Fe 3 O 4 @LDH were investigated. The initial pH of the solution significantly affected the tphp adsorption, whereas the ionic strength and HA slightly affected the adsorption. The main adsorption mechanism was attributed to electrostatic interaction and π-π interaction. We believe that urea is one of excellent functional groups for the tphp adsorption removal and the materials with urea groups as the adsorbents exhibit good prospects in the future.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2022
·
IF 7.926
Xiaona Dong,Ruonan Feng,Yuanming Jiang,Tianming Cai,Canlan Jiang
Soil contamination by triphenyl phosphate (TPHP) has posed a potential threat to human health. In this study, the degradation of TPHP by different chemical oxidation methods, including H 2 O 2 , persulfate (PS), peroxymonosulfate (PMS), ferrous ions (Fe 2+ ) activated H 2 O 2 , Fe 2+ activated PS, heat activated PS (heat-PS), and heat activated PMS, was compared. Heat input could promote the activation of PS to generate highly reactive species (HRS) and the aqueous availability of TPHP for more efficient degradation of TPHP in soil than other methods. As reaction temperature rose to melting point of TPHP (50 o C), the degradation rate sharply increased. The activation energy ( Ea ) of TPHP degradation in soil was caculated to be 115.57 kJ mol -1 . The oxidation capacity per unit PS was about 22.0 M -1 . Sulfate radicals (SO 4 •− ) and hydroxyl radicals (•OH) were the major HRS for TPHP degradation in heat-PS system. With increasing of soil-water ratio, the inhibitory effect of soil organic matter (SOM) on TPHP degradation was significantly enhanced. The degradation efficiency was highest under weakly acidic conditions (pH ≈ 4.8). Cl − significantly inhibited the degradation of TPHP in heat-PS system, while HCO 3 − and H 2 PO 4 − had little effects on the degradation of TPHP. After reaction, TPHP in soil could be degraded to be less toxic para -hydroxy triphenyl phosphate ( p -OH-TPHP), diphenyl phosphate (DPHP), and phosphate ions (PO 4 3− ). This study discloses a sustainable strategy for the remediation of OPFRs-contaminated soil by utilizing heat-PS method.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Yajing Jian,Linfeng Chen,Jing Cheng,Xiaolan Huang,Ling Yan,Haibing Li
Triphenyl phosphate (TPhP), a typical model of organophosphorus flame retardants (OPFRs), has been regarded as emerging environmental contaminants of health concern. In this study, TPhP molecularly imprinted polymers immobilized on graphene oxide (GO) film (TPhP-MIPs/GO) monolithic fiber for direct immersion solid phase microextraction (DI-SPME) was fabricated and evaluated. Compared with TPhP molecularly imprinted polymers (TPhP-MIPs) monolithic fiber, TPhP-MIPs/GO fiber had bigger extraction capacity, stronger hydrophilicity and faster mass transfer rate. Furthermore, TPhP-MIPs/GO fiber displayed excellent selectivity for TPhP among its structure analogues. It was thermally stable up to 320 °C so that it can withstand the high temperature of gas chromatography (GC) injection port for desorption and detection by flame photometric detector (FPD). Under optimal conditions, TPhP-MIPs/GO-SPME-GC/FPD method was developed by yielding satisfactory ultralow limit of quantification (0.4 ng L −1 ); linearity (≥0.99), good intra- and inter-day precision for a single fiber and fiber-to-fiber reproducibility. The method was applied for the determination of TPhP in environmental water and the relative recoveries were found to be in the range from 70 to 110%. TPhP was detected in three out of four environmental water samples at concentration levels from 0.04 to 0.12 ng mL −1 , illustrating light pollution of TPhP in most environmental water.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Jing Cheng,Xiaolan Huang,Linfeng Chen,Ling Yan,Fei Zhu,Haibing Li
Driven by the urgent need for the determination of trace level triphenyl phosphate (TPhP) present in environment, a simple, rapid and ultrasensitive sensor has been fabricated for detection of TPhP by directly measuring transmembrane current. The transmembrane containing artificial nanochannel named polyethylene terephthalate (PET) nanochannel membrane is designed to be grafted by TPhP molecularly imprinted polymers (TPhP-MIPs) on its outer surface and inner surface of nanochannel. After the fabricated membrane banded TPhP, the transmembrane current decreased. The rate of current change is linearly proportional to the logarithm value of TPhP concentrations in the range of 0.001 ng mL −1 -800 ng mL −1 . Meanwhile, the limit of detection (LOD) was 0.0003 ng mL −1 . This LOD value is much lower than most results acquired by using chromatography-mass spectrometry and electrochemistry (EC) sensor based on the functionalization of electrode, whereas the cost of our fabricated EC sensor is much lower. The newly developed sensor is suitable for real-time or field detection of TPhP. The interference of analogs and non-analogs with similar structure of TPhP can be effectively avoided. The sensor not only exhibits high selectivity for TPhP, but also shows ultrasensitive assay for measuring TPhP in real environmental water.
研究领域:
环境科学
·
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 4
·2198-2208
·
IF 3.119
Hui Su,Jiaxin Lv,Liansheng Yang,Li Feng,Yongze Liu,Ziwen Du,Liqiu Zhang
The pollution of aromatic organophosphorus flame retardants (aromatic OPFRs) in aquatic environments has drawn great attention over the last few years. Two MIL-101-based metal–organic frameworks (Cr-MIL-101 and Fe-MIL-101-NH2) which possess ordered mesoporous cavities (2.9 and 3.4 nm) and aromatic structures were chosen and prepared to selectively adsorb a typical aromatic OPFR [triphenyl phosphate (TPhP)] from aqueous solution. Pore distribution analysis showed that Cr-MIL-101 and Fe-MIL-101-NH2 had both a mesoporous structure (2–3.5 nm) and microporous structure (1–2 nm), conducive to diffusion and adsorption of TPhP molecules. Compared with Fe-MIL-101-NH2 as well as commercial activated carbon, Cr-MIL-101 showed rapid and efficient adsorption for TPhP, and its initial sorption velocity (v0) calculated from the pseudo-second-order model was up to 568.18 μmol g−1 h−1. The adsorption equilibrium of TPhP on the Cr-MIL-101 was almost achieved within 12 h, while the equilibrium time of other adsorbents required more than 48 h. The study of selective adsorption found that Cr-MIL-101 had a higher sorption amount for aromatic OPFRs than alkyl-OPFRs and other aromatic compounds with different chemical structures. Cr-MIL-101 was able to keep a steady selective adsorption for TPhP in the presence of co-existing aromatic compounds. Based on the analysis of Kow, molecular structure and further density functional theory calculations, hydrophobic interactions may play a dominant role in the selective adsorption process of TPhP, and π–π interactions may be also involved. Cr-MIL-101 exhibits reusability and promising potential to rapidly and selectively remove aromatic OPFR in environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Honghuai Sun,Bo Niu,Jie Guo,Rui Wang,Qingming Song,Ruitong Gao,Zhenming Xu
Waste printed circuit boards (WPCBs) are hazardous wastes but also valuable resources. Mechanical crushing is widely used to recycle WPCBs. Some pollutants are released during the crushing, but the release mechanisms have been rarely reported. Herein, the experimentation results with the theoretical analysis can well explain the release mechanism of pollutants during the crushing of WPCBs. According to the size distribution of material in different crushing conditions, the collision analysis can describe the crushing process and illustrate the energy changes during the crushing. The energy changes in crack extension indicate that the reduced energy transferred to WPCBs results in a decrease in concentration and size of airborne particles with the crushing proceeding. Besides, the energy changes during the crushing illustrate the release mechanism of organic substances. In the early period of crushing, all branched chains on benzenes are broken to form phenol at the high energy. In the late period of crushing, phenol homologs are largely generated at the low energy. Moreover, the release behavior of triphenyl phosphate is relative to the accumulated energy during the crushing. This study provides a theoretical basis for the release of pollutants during the crushing process of WPCBs.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Lingfei Zhu,Xiaohan Huang,Zhenhua Li,Gang Cao,Xuanjin Zhu,Shaohua She,Tenghao Huang,Gang Lu
Increasing use of organophosphorus flame retardants (OPFRs) has aroused great concern to their uncertain environment risk, especially to human health risk. In our study, hepatotoxicity screening of six aryl-OPFRs, potential hepatotoxicity mechanism of 2-ethylhexyldiphenyl phosphate (EHDPP) using RNA-sequencing and its metabolites were investigated in human hepatocytes (L02). The toxicity results demonstrated that EHDPP should be prioritized for further research with the highest toxicity. Further RNA-seq results through GO and KEGG enrichment analysis indicated that exposure to 10 mg/L of EHDPP significantly affected energy homeostasis , endoplasmic reticulum (ER) stress, apoptosis, cell cycle, and inflammation response in cells. The top 12 hub genes were validated by RT-qPCR and conformed to be mainly related to glycolysis and ER stress, followed by cell cycle and inflammation response. Western blot, apoptosis detection, glycolysis stress test, and cell cycle analysis were further performed to verify the above main pathways. Additionally, it was found in the metabolism experiment that detoxification of EHDPP by phase I and phase II metabolism in cells wasn’t significant until 48 h with a metabolic rate of 6.12%. EHDPP was stable and still dominated the induction of toxicity. Overall, this study provided valuable information regarding the toxicity and potential metabolism pathway of EHDPP.
研究领域:
毒理学
·
分子生物学
·
基因组学
✓ 已验证
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Xiaomin Yang,Xin Li,Lizhi Zhang,Jingming Gong
Triphenyl Phosphate (TPhP), as a typical model of organophosphorus flame retardants (OPFRs), has been regarded as emerging environmental contaminants of health concern. In this study, a rapid and highly sensitive visible-light-response PEC sensor has been developed for the detection of Triphenyl Phosphate (TPhP) using electrospun template directed molecularly imprinted nanofibers modified BiOI nanoflake arrays (BiOINFs) as a photoactive electrode. The molecularly imprinted electrospun nanofibers (labeled as MI-ESNFs) were carefully characterized by scanning electron microscopy (SEM), UV spectra , FTIR spectra measurements and various electrochemical techniques . Under the optimized experimental conditions, the photoelectrochemical response was linearly proportional to the logarithm value of TPhP concentrations in the range of 0.01 ng mL −1 to 500 ng mL −1 . Meanwhile, the sensor exhibited high selectivity and stability.
研究领域:
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）