A5028139667- Adsorption and biosorption for pollutant removal
- Toxic Organic Pollutants Impact
- Pharmaceutical and Antibiotic Environmental Impacts
- Atmospheric chemistry and aerosols
- Graphene research and applications
- Environmental remediation with nanomaterials
- Hydraulic Fracturing and Reservoir Analysis
- Graphene and Nanomaterials Applications
- Carbon Nanotubes in Composites
- Marine and coastal ecosystems
- Catalytic Processes in Materials Science
- Nanomaterials for catalytic reactions
- Reservoir Engineering and Simulation Methods
- Electrochemical Analysis and Applications
- Advanced Photocatalysis Techniques
- Crystallization and Solubility Studies
- Nanoparticles: synthesis and applications
- X-ray Diffraction in Crystallography
- Drilling and Well Engineering
- Water Treatment and Disinfection
- Analytical chemistry methods development
- Air Quality and Health Impacts
- Nanopore and Nanochannel Transport Studies
- Groundwater flow and contamination studies
- Radioactive element chemistry and processing
Peking University
2015-2024
Texas A&M University
2003-2024
Changzhi Medical College
2024
State Key Laboratory of Pollution Control and Resource Reuse
2011-2021
Nanjing University
2012-2021
Chengdu Fifth People's Hospital
2020
State Key Laboratory of Vehicle NVH and Safety Technology
2015
Mitchell Institute
2005-2014
Nankai University
1998-2009
Connecticut Agricultural Experiment Station
2003-2006
Significant concerns have been raised over the presence of antibiotics including tetracyclines in aquatic environments. We herein studied single-walled carbon nanotubes (SWNT) and multi-walled (MWNT) as potential effective adsorbents for removal tetracycline from aqueous solution. In comparison, a nonpolar adsorbate, naphthalene, two other carbonaceous adsorbents, pulverized activated (AC) nonporous graphite, were used. The observed adsorbent-to-solution distribution coefficient (Kd, L/kg)...
Understanding adsorptive interactions between organic contaminants and carbon nanotubes is critical to both the environmental application of as special adsorbents assessment potential impact on fate transport in environment. The adsorption compounds with varied physical-chemical properties (hydrophobicity, polarity, electron polarizability, size) one single-walled nanotube (SWNT) two multiwalled (MWNTs) was evaluated. For a given nanotube, affinity correlated poorly hydrophobicity but...
Molecular interactions controlling the sorption of pollutants to environmental black carbons (soot, charcoal) are not well-resolved. Sorption a series aromatic compounds was studied wood charcoal and nonporous graphite powder as model adsorbent. Issues concern were possible involvement π−π electron donor−acceptor (EDA) electron-poor electron-rich solutes with graphene (polycyclic aromatic) surface size exclusion effects. π-acceptors, benzonitrile (BNTL), 4-nitrotoluene (MNT),...
The combined effects of hydroxyl/amino functional groups aromatics and surface O-containing carbon nanotubes on adsorption were evaluated. When normalized for hydrophobicity, 2,4-dichlorophenol 2-naphthol exhibited a greater adsorptive affinity to graphite (a model adsorbent without the O functionality) than structurally similar 1,3-dichlorobenzene naphthalene, respectively, 1-naphthylamine much all other compounds. Results pH-dependency experiments further indicated that adsorbates...
The presence of sulfonamide antibiotics in aquatic environments has been recognized as an issue warranting consideration. In this study, we evaluated multiwalled carbon nanotubes (MWNT) a potential effective adsorbent for removal two antibiotics, sulfapyridine and sulfamethoxazole, from aqueous solutions. Nonporous, functionality-free graphite was included comparative adsorbent. Despite the very low hydrophobicity, sulfonamides adsorbed strongly to MWNT graphite, fact attributed pi-pi...
Dissolved black carbon (BC) released from biochar can be one of the more photoactive components in dissolved organic matter (DOM) pool. BC was mainly composed aliphatics and aromatics substituted by aromatic C-O carboxyl/ester/quinone moieties as determined solid-state nuclear magnetic resonance. It underwent 56% loss absorbance at 254 nm, almost complete fluorescence, 30% mineralization during a 169 h simulated sunlight exposure. Photoreactions preferentially targeted methyl moieties,...
The main objective of this study was to investigate the key factors and mechanisms antibiotic adsorption on crop residue-derived black carbon, as well relative importance carbon overall sorption soil. Batch experiments were performed for two reference antibiotics (sulfamethoxazole tetracycline) wheat- maize-residue-derived carbon. After removal mineral fraction from raw by acidification, tetracycline exhibited less enhanced than sulfamethoxazole, implying stronger complexation components....
The presence of pharmaceutical antibiotics in aquatic environments poses potential human health and ecological risks. We synthesized ordered micro- mesoporous carbons, further conducted batch experiments to systematically examine their adsorption properties toward three antibiotics, sulfamethoxazole, tetracycline, tylosin, aqueous solution. In comparison, nonporous graphite, single-walled carbon nanotubes, two commercial microporous activated carbons were included as additional adsorbents....
Whereas the antimicrobial mechanisms of silver have been extensively studied and exploited for numerous applications, little is known about associated bacterial adaptation defense that could hinder disinfection efficacy or mitigate unintended impacts to microbial ecosystem services with release environment. Here, we demonstrate extracellular polymeric substances (EPS) produced by bacteria constitute a permeability barrier reducing constituents antibacterial activity ions (Ag+). Specifically,...
Nanoplastics (NPs) are becoming an emerging pollutant of global concern. A potential risk is that NPs may serve as carriers to increase the spreading coexisting contaminants. In this study, we examined effects polystyrene nanoplastics (PSNPs, 100 nm), used a model NP, on transport five organic contaminants different polarity in saturated soil. The presence low concentrations PSNPs significantly enhanced nonpolar (pyrene) and weakly polar (2,2′,4,4′-tetrabromodiphenyl ether) compounds, but...
Biomineralization is a critical process controlling the biogeochemical cycling, fate, and potential environmental impacts of heavy metals. Despite indispensability extracellular polymeric substances (EPS) to microbial life their ubiquity in soil aquatic environments, role played by EPS transformation biomineralization metals not well understood. Here, we used gold ion (Au3+) as model metal quantitatively assess discern responsible functional groups. Integrated spectroscopic analyses showed...
Here, we systematically compared the photoactivity and photobleaching behavior between dissolved black carbon (DBC) from rice straw biochar leached organic (LDOC) compost using complementary techniques. The Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS) analysis showed that DBC was dominated by polycyclic aromatic (55.1%) tannin-like molecules (24.1%), while LDOC lignin-like (58.9%) (19.7%). Under simulated sunlight conditions, had much higher apparent quantum yields...
We systematically studied effects of pH, ionic strength, and presence Cu2+ (50 mg/L) or a dissolved humic acid (HA, Fluka) on adsorption three nonionic aromatic compounds, naphthalene, 1,3-dinitrobenzene, 1,3,5-trinitrobenzene to single-walled carbon nanotubes. Presence variance in the strength between 0.02 0.1 M (NaNO3) only slightly affected affinities. HA reduced compounds by 29−57% for CNTs, as measured change distribution coefficient (Kd), 80−95% graphite. In contrast nonporous...
Environmental black carbon (BC) is believed to be an important adsorbent of organic pollutants. In this study, we examined the effects changes in surface properties and adsorbate structure. A series apolar compounds (cyclohexane, 1,2-dichlorobenzene, 1,4-xylene, 1,2,3,5-tetramethylbenzene, 1,3,5-triethylbenzene) a polar (o-cresol, 4-nitrotoluene, 2,4-dinitrotoluene, 2,4,6-trinitrotoluene) were sorbed from aqueous solution maple wood char prepared under five thermochemical conditions. Two...
Elucidation of molecular-level interactions controlling the sorption organic compounds in soils is major theoretical and practical interest. Sorption π-electron donor compounds, pentamethylbenzene (PMB), naphthalene (NAPH), phenanthrene (PHEN), a number was found to increase with decreasing pH range approximately 2.5−7. This behavior could not be attributed pH-dependent alteration hydrophobic character humic substances, π-H-bonding, interaction mineral surfaces, black carbons, solute...
Carbon nanotubes have shown great potential as effective adsorbents for hydrophobic organic contaminants in water treatment. The present study investigated the influence of aqueous solution chemistry on adsorption tetracycline to carbon nanotubes. Specifically, effects ionic strength (NaCl and CaCl(2) ) presence Cu(2+) ion (7.5 mg/L) or dissolved soil coal humic acids (50 single-walled (SWNT), multi-walled (MWNT), nonporous pure graphite a model surface were systematically estimated....
The relatively low surface area and micropore volume of carbon nanotubes limit their potential application as effective adsorbents for hydrophobic organic contaminants. In this study, KOH dry etching was explored to prepare activated single-walled (SWNT) multiwalled (MWNT) adsorption model monoaromatic compounds (phenol nitrobenzene) pharmaceutical antibiotics (sulfamethoxazole, tetracycline, tylosin) in aqueous solutions. With activation, the specific increased from 410.7 m2/g 652.8 SWNT...
Black carbon (BC) is believed to be an important adsorbent of organic pollutants. A complex suite heavy metals and pollutants commonly present in many situations. An issue that has received little direct attention the effect on sorption compounds BC. We found coadsorption Cu2+ at environmentally relevant, comparable concentration (50 mg L-1) decreases both polar compound, 2,4-dichlorophenol (DCP), nonpolar compounds, 1,2-dichlorobenzene (DCB) naphthalene (NAP), by 30-60%, as measured bythe...
The main objective of this study was to test the possibility that graphene-based nanomaterials can mediate environmentally relevant abiotic redox reactions organic contaminants. We investigated effect graphene oxide (GO) on reduction nitrobenzene by Na2S in aqueous solutions. With presence GO (typically 5 mg/L), observed pseudofirst-order rate constant (kobs) for raised nearly 2 orders magnitude (from 7.83 × 10(-5) h(-1) 7.77 10(-3) h(-1)), strongly suggesting reaction mediation GO. As...