The adsorptive potential of multiwalled carbon nanotubes (MWNTs) for solid-phase extraction bisphenol A, 4-n-nonylphenol, and 4-tert-octylphenol was investigated the first time. three analytes are quantitatively adsorbed on a MWNTs-packed cartridge, then retained cartridge desorbed with suitable amounts methanol. Finally, in methanol eluate determined by high performance liquid chromatography-fluorometric detection. Parameters influencing efficiency, such as volume sample solutions, pH...

We here first proposed a yolk-shell Co3O4@metal-organic frameworks (MOFs) nanoreactor via facile method to accommodate sulfate radical-based advanced oxidation processes (SR-AOPs) into its interior cavity. The mesoporous and adsorptive MOFs shells allow the rapid diffusion of reactant molecules encapsulated Co3O4 active sites, confined high instantaneous concentration reactants in local void space is anticipated facilitate SR-AOPs. As proof concept, was fully characterized applied for...

This paper demonstrates, for the first time, that ionic liquids (IL) such as 1-octyl-3-methylimidazolium hexafluorophosphate ([C(8)MIM][PF(6)]) are excellent extraction solvents in liquid-phase microextraction (LPME). The unique properties of nonvolatility and adequate viscosity allow IL to be conveniently adopted both direct-immersion headspace LPME. Model compounds, polycyclic aromatic hydrocarbons (PAHs), rapidly enriched a 3-microL drop [C(8)MIM][PF(6)] suspended on tip microsyringe...

ADVERTISEMENT RETURN TO ISSUEPREVViewpointNEXTPerspectives on the Inclusion of Perfluorooctane Sulfonate into Stockholm Convention Persistent Organic Pollutants1Reflections inclusion perfluorooctane sulfonate Pollutants.Thanh Wang, Yawei Chunyang Liao, Yaqi Cai, and Guibin JiangView Author Information State Key Laboratory Environmental Chemistry Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy Beijing1Editor’s Note: This manuscript was accepted publication April...

Short-chain perfluoroalkyl acids (PFAAs), which have less than seven fluorinated carbons, been introduced as substitutes for eight-carbon homologue products. In this study, water, sediment, and biological samples (fish plant) were collected from Tangxun Lake, is located near a production base of the fluorochemical industry in Wuhan, China. Perfluorobutane sulfonate (PFBS) perfluorobutanoic acid (PFBA) predominant PFAAs surface with average concentrations 3660 ng/L 4770 ng/L, respectively....

Abstract A novel, simple and efficient strategy for fabricating a magnetic metal-organic framework (MOF) as sorbent to remove organic compounds from simulated water samples is presented tested removal of methylene blue (MB) an example. The novel adsorbents combine advantages MOFs nanoparticles possess large capacity, low cost, rapid easy separation the solid phase, which makes it excellent treatment wastewaters. resulting composites (also known MFCs) have surface areas (79.52 m 2 g −1 ),...

The incomplete mass-balance of organic fluorine in human serum indicates the existence unknown per- and polyfluoroalkyl substances (PFASs) with persistent bioaccumulative properties. Here we characterized exposure elimination kinetics chlorinated ether sulfonic acids (Cl-PFESAs) metal plating workers (n = 19), high fish consumers 45), background controls 8). Cl-PFESAs were detected >98% sampled individuals concentrations ranging <0.019–5040 ng/mL. Statistically higher median levels observed...

A facile strategy for the fabrication of novel bouquet-shaped magnetic porous nanocomposite via grafting a covalent organic framework (COF, TpPa-1) onto surface-modified Fe3O4 nanoparticles (Fe3O4 NPs) was reported. The TpPa-1 (a COF synthesized from 1,3,5-triformylphloroglucinol (Tp) and p-phenylenediamine (Pa-1)) contains clusters core–shell interconnected nanofibers. Thus, it possesses larger specific surface area, higher porosity, supermagnetism, making an ideal sorbent enrichment trace...

Following the global actions to phase out perfluoroctanesulfonic acid (PFOS) a large number of alternative per- and polyfluoroalkyl substances, with poorly defined hazard properties, are being used in increasing quantities. Here, we report on first detection chlorinated ether sulfonic F-53B biological samples determine tissue distribution whole body bioaccumulation factors (BAFwhole body) crucian carp (Carassius carassius). Analysis fish from Xiaoqing River (XR) Tangxun Lake (TL)...

Understanding the bioaccumulation mechanisms of per- and polyfluoroalkyl substances (PFASs) across different chain-lengths, isomers functional groups represents a monumental scientific challenge with implications for chemical regulation. Here, we investigate how differential tissue distribution behavior 25 PFASs in crucian carp from two field sites impacted by point sources can provide information about processes governing uptake, elimination PFASs. Median tissue/blood ratios (TBRs) were...

Although organophosphate diester (di-OPE) metabolites in urine are usually used to assess human exposure esters (OPEs), whether they can reflect all OPEs with great differences chemical structures and properties is still currently unclear. In this study, we detected sixteen ten di-OPEs 52 paired whole blood, serum, samples collected Beijing, China investigate the correlations between different compounds matrices, thus providing proper biomarkers of OPEs. The order median concentrations ∑OPEs...

Covalent linkages are the key component of covalent organic frameworks (COFs). The development stable and functional is essential to expand COFs family broaden their application prospects. In this work, we report synthesis crystalline chemical 4-carboxyl-quinoline linked (QL-COFs) via Doebner reactions in both one-pot (OP) post-synthetic modification (PSM) methods. Both methods can be universally applied most reported imine bottom-up construction or linkage conversion. Owing contractive pore...

The occurrence, distribution and bioaccumulation of 22 antibiotics, including eight fluoroquinolones (FQs), nine sulfonamides (SAs) five macrolides (MLs), in the Haihe River were investigated. Surface water, sediment fish samples analyzed by HPLC-MS/MS. Ofloxacin, sulfamethoxazole, sulfadiazine, erythromycin roxithromycin found all surface water samples. SAs predominant antibiotics mainstream River, with maximum concentration 201 ng L−1 for sulfamethoxazole. Compared higher concentrations...

In the present study, chitosan-coated octadecyl-functionalized magnetite nanoparticles (Fe3O4−C18−chitosan MNPs) are synthesized and used as an adsorbent to extract trace analytes from environmental water samples. The magnetic nanoparticles, 20 nm in diameter, of uniform size have a high saturation value 52 emu g−1, which endue with large surface area convenience isolation. anionic pollutants, perfluorinated compounds (PFCs), trapped by octadecyl group interior hydrophobic layer. positively...