A5035633946- Nanoparticles: synthesis and applications
- Heavy metals in environment
- Graphene and Nanomaterials Applications
- Toxic Organic Pollutants Impact
- Microplastics and Plastic Pollution
- Adsorption and biosorption for pollutant removal
- Soil Carbon and Nitrogen Dynamics
- Pharmaceutical and Antibiotic Environmental Impacts
- Carbon and Quantum Dots Applications
- Geochemistry and Elemental Analysis
- Clay minerals and soil interactions
- Carbon Nanotubes in Composites
- Analytical chemistry methods development
- Graphene research and applications
- Advanced Photocatalysis Techniques
- Advanced Nanomaterials in Catalysis
- Arsenic contamination and mitigation
- Plant Stress Responses and Tolerance
- Marine and coastal ecosystems
- Pesticide and Herbicide Environmental Studies
- Recycling and Waste Management Techniques
- Environmental remediation with nanomaterials
- Iron oxide chemistry and applications
- Radioactive element chemistry and processing
- Air Quality and Health Impacts
University of Massachusetts Amherst
2016-2025
University of Massachusetts Boston
2009-2025
Amherst College
2007-2021
Ocean University of China
2008-2015
Zhejiang University
2005-2010
Beijing Normal University
2008-2010
Peking University
2006-2010
China University of Geosciences (Beijing)
2010
University of Science and Technology Beijing
2010
China University of Geosciences
2010
The use of equilibrium expressions for sorption to natural particles in fate and transport models is often invalid due slow kinetics. This paper reviews recent research into the causes desorption rates at intraparticle level how this phenomenon relates contaminant transport, bioavailability, remediation. Sorption kinetics are complex poorly predictable present. Diffusion limitations appear play a major role. Contending mechanisms include diffusion through organic matter matrices nanopores....
Increasing application of nanotechnology highlights the need to clarify nanotoxicity. However, few researches have focused on phytotoxicity nanomaterials; it is unknown whether plants can uptake and transport nanoparticles. This study was examine cell internalization upward translocation ZnO nanoparticles by Lolium perenne (ryegrass). The dissolution its contribution toxicity ryegrass were also investigated. Zn2+ ions used compare verify root in a hydroponic culture system. visualized light...
Chars originating from the burning or pyrolysis of vegetation may significantly sorb neutral organic contaminants (NOCs). To evaluate relationship between char composition and NOC sorption, a series samples were generated by pyrolyzing wheat residue (Triticum aestivum L.) for 6 h at temperatures 300 degrees C 700 analyzed their elemental compositions, surface areas, functional groups. The then studied abilities to benzene nitrobenzene water. A commercial activated carbon was used as...
Carbon nanomaterials are novel manufactured materials, having widespread potential applications. Adsorption of hydrophobic organic compounds (HOCs) by carbon may enhance their toxicity and affect the fate, transformation, transport HOCs in environment. In this research, adsorption naphthalene, phenanthrene, pyrene onto six nanomaterials, including fullerenes, single-walled nanotubes , multiwalled was investigated, which is first systematic study on polycyclic aromatic hydrocarbons (PAHs)...
The widely accepted dissolution (partition) model of sorption to soil organic matter (SOM) has been challenged by evidence that SOM a non-uniform potential. This study presents data supporting previously sug gested alternative dual-mode in which and hole-filling mechanisms take place concurrently, as glassy polymers. holes are postulated be nanometer-size voids within the matrix provide complexation sites. main focus was on chlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, but some...
This work reports on the toxicity of CuO nanoparticles (NPs) to maize (Zea mays L.) and their transport redistribution in plant. NPs (100 mg L(-1)) had no effect germination, but inhibited growth seedlings; comparison dissolved Cu(2+) ions bulk particles obvious growth. were present xylem sap as examined by transmission electron microscopy (TEM) energy dispersive spectroscopy (EDS), showing that transported from roots shoots via xylem. Split-root experiments high-resolution TEM observation...
With increasing production and application of carbon nanotubes (CNTs), it becomes necessary to understand the interaction between CNTs aromatic compounds, an important group organic contaminants structural components large molecules in biological systems. However, so far few experimental studies have been conducted systematically investigate sorption mechanism polar aromatics CNTs. Therefore, cyclohexanol, phenol, catechol, pyrogallol, 2-phenylphenol, 1-naphthol, naphthalene were selected...
This is part of a larger study that addresses the question whether site-specific sorption organic compounds takes place in soil matter (SOM). Competitive one indication such interactions may take place. was tested between atrazine (AT) and other co-solutes water suspensions natural model sorbents. The included several s-triazine analogs, substituted benzene analog (5-chloro-1,3-dimethoxybenzene), dissimilar compound, trichloroethene (TCE). sorbents mineral (3% OM), peat (93% humic acid...
Engineered nanoparticles, due to their unique electrical, mechanical, and catalytic properties, are presently found in many commercial products will be intentionally or inadvertently released at increasing concentrations into the natural environment. Metal- metal oxide-based nanomaterials have been shown act as mediators of DNA damage mammalian cells, organisms, even bacteria, but molecular mechanisms through which this occurs poorly understood. For first time, we report that copper oxide...
Adsorption of 17α-ethinyl estradiol (EE2) and bisphenol A (BPA) on carbon nanomaterials (CNMs) was investigated. Single point adsorption coefficients (K) showed significant relationship with specific surface areas CNMs for both chemicals, indicating area is a major factor EDC CNMs. BPA capacity higher than EE2 fullerene single-walled nanotubes (SWCNT). Our molecular conformation simulation indicated that has unique ability to adsorb the curvature because its "butterfly" structure two benzene...
Biochar can benefit human society as a carbon-negative material and soil amendment. However, negative biochar impacts on plant germination growth have been observed, they not fully explained. Therefore, protocols to avoid these risks cannot be proposed. We hypothesized that the free radicals generated during charring may inhibit growth. Significant electron paramagnetic resonance (EPR) signals were observed in biochars derived from several types of common biomass (corn stalk, rice, wheat...
Small (6-10 nm) functionalized gold nanoparticles (AuNPs) featuring different, well-defined surface charges were used to probe the uptake and distribution of nanomaterials in terrestrial plants, including rice, radish, pumpkin, perennial ryegrass. Exposure AuNPs plant seedlings under hydroponic conditions for a 5-day period was investigated. Results from these studies indicate that AuNP depend on both nanoparticle charge species. The experiments show positively charged are most readily taken...
Adsorption of natural organic matter (NOM) on nanoparticles (NPs) is important for evaluating their transport, transfer, and fate in the environment, which will also affect sorption hydrophobic compounds (HOCs) by NPs thereby potentially alter toxicity fate, bioavailability HOCs environment. Therefore, adsorption behavior humic acids (HA) four types nano-oxides (i.e., TiO2, SiO2, Al2O3, ZnO) was examined this study to explore interaction mechanisms using techniques including Fourier...