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Mn1Ce1 and Mn0.9Co0.1Ce1 complex oxides were prepared by co-precipitation in hydrothermal conditions and their physicochemical properties were characterized with N2 adsorption, XRD, Raman, and SEM. The complex oxides show enough stability and catalytic activity for oxidative degradation of 4,4'-Dibromobiphenyl in sub-critical water. Mn0.9Co0.1Ce1 has higher activity than Mn1Ce1, indicating doping...
Abundant of estrogens is excreted via human urine, bringing the risk of micro-pollution during nutrients recovery from urine. This study investigated the characteristics of estrogens during the ammonification of urine, and then experiments were conducted to study the adsorption of estrogens on struvite, a potential product to recover nutrients from urine. The results showed that no 17a ethinylestradiol...
The adsorption of thiophene from thiophene-octane mixture has been investigated using organic-montmorillonite under proper conditions. The adsorbents were prepared by a xerogel process, followed by thermo - treatment. The adsorptive experiments show that C-P-MMT adsorbent has the higher capacity, 3.8mg/g (mg of sulfur per g of adsorbent). BET, XRD, NMR were used to characterize the adsorbents. It...
A study of the adsorption kinetics of 1-octanethiol and 1,8-octanedithiol has been carried out on gold electrode by cyclic voltammetry with different concentrations. Analysis of the kinetic data show that the adsorption kinetics of 1-octanethiol and 1,8-octanedithiol can be satisfactorily described by Diffusion controlled Langmuir(DCL) model, irrespective of concentration. The rate constants of 1-octanethiol...
Organic matter (OM) is important for ammonium sorption in lake sediments, but as a matter of fact, there is no general consensus about the effects of OM on ammonium adsorption behavior. In this study, the sediment samples of different OM contents and the different components of organic matter were gained from Wuli Lake sediment through pretreatment, then the ammonium adsorption kinetics and thermodynamics...
Adsorption of 2, 4, 6-trichlorophenol onto octyl-modified ordered mesoporous silica material from aqueous solution has been investigated systematically using batch experiments in this study. Results indicate that 2, 4, 6-trichlorophenol adsorption is initially rapid and the adsorption process reaches a steady state after 1 min. The adsorption isotherms are well described by the Langmuir and the Freundlich...
Isotherms and kinetics of adsorption of phenol on microwave organic modified montmorillonite were investigated. The results show that the adsorption capacity of M-OMt was determined as 58.14 mg/g at the conditions of pH7.2 contact time of 1 hour and temperature of 20 C. The adsorption data is a good fit with Freundlich isotherm, and the adsorption kinetics is in better agreement with pseudo-second...
This study investigated the effects of dissolved organic matter (DOM) extracted form maize straw on the mobility of Cr6+ in sandy soil and losses widespread in northwest region through simulated dynamic soil column system. The results indicated that the mobility of Cr6+ was influenced significantly by DOM in saturated water-soil system. Cr6+ had strong mobility because of weak adsorption and easily...
Influence of soil organic matter (SOM) on the adsorption, desorption and transport of polycyclic aromatic hydrocarbons (PAHs) has already been given full investigation in soils. In this paper, High Performance Liquid Chromatography (HPLC) was used to detected and elucidate aqueous leaching of PAHs in different types of soil with soil columns, which enhanced understanding on transport of PAHs appreciably...
Adsorption of humic acid (HA) and Cu(II) onto cetyl pyridinium bromide (CPB) modified zeolite was investigated in single- and binary-adsorbate systems. The equilibrium adsorption data of HA and Cu(II) onto CPB modified zeolite in the single-adsorbate system were analyzed by the Langmuir and Freundlich isotherm models. The equilibrium adsorption data were well described by the Langmuir isotherm model,...
This paper reports on the design and experimental verification of the first prototype of a resonant sensing platform based on nanoscaled aluminum nitride Contour-Mode Resonant Sensors (CMR-S) for selective detection of sub-ppb levels of volatile organic chemicals (VOCs). For the first time arrays of 8 nano-CMR-S were fabricated on the same chip and functionalized with two different thiol-terminated...
Glyphosate is the herbicide widely used in China. However, little is known on the processes governing the environmental fate of glyphosate in soils and its environmental risk for groundwater. Laboratory experiments were performed to evaluate the degradation, adsorption, and leaching behavior of glyphosate in three agricultural soils with high sand content and different soil organic carbon content...
Sensing applications in the petroleum industry pose unique challenges due to high viscosity and high refractive index of hydrocarbon fluids, which render many fluid-based techniques impractical. Real-time observation of adsorption, desorption, and competitive adsorption processes of long chain functionalized hydrocarbons onto activated cantilevers in static mode are shown. In addition, microcantilevers...
Treatment of the wastewater containing amantadine hydrochloride with adsorption in order to achieve lower the effluent COD of amantadine hydrochloride. A comparison of the adsorbents (activated carbon, diatomite, zeolite, slag and steel slag, etc.) on amantadine hydrochloride water the maximum saturation capacity and adsorption isotherms, and the factor of economic, to finalize a kind of the adsorbents...
The bench-scale test of toluene decomposition is carried out using adsorption and surface discharge with gas circulation. The liquid toluene is vaporized in the circulation line, and the toluene gas is adsorbed by the adsorbent. The hydrophobic zeolite pellet is used as an adsorbent. After the toluene adsorption, ozone generated by surface discharge is supplied to the adsorbent and adsorbed toluene...
TiO2 is the most frequently employed photocatalyst in realising complete mineralization of organic pollutants in water treatment. Its large bandgap energy necessitates though UV excitation to induce charge separation within the particle. Nitrogen doped into substitutional sites of TiO2 has shown bandgap narrowing and photocatalytic activity in the visible light. N-doped and non-doped mesoporous titania...
Self assembled monolayer (SAM) of alkane-thiol of 6-carbon (1-hexanethiol, C6) chain length is applied on Cu surface (deposited on Si substrate) and examined carefully. Firstly, the ability of SAM adsorption onto Cu surface is confirmed by the sharp rise of water contact angle (CA) on the surface. Next, the thermal stability of SAM when it is stored in different environments is studied. The CA decreases...
Study on the adsorption properties of an organic volatile contaminant on residual soil mixed with multi-walled carbon nanotube (MWNT) is presented. The soil samples were thoroughly characterized for their physical chemical properties and composition, particularly organic matter. The adsorption isotherms are well described by both Langmuir and Freundlich models. The result shows that MWNT can be good...
Factors affecting the use of cheap and ecofriendly pretreated bagasse for potential removal of methylene blue (basic dye) and orange II (acid dye) from wastewater were studied. Sugarcane bagasse was pretreated with propionic acid with the aim to effectively adsorb the above mentioned two dyes at varying dye concentrations, adsorbent dosage, pH and contact time. The kinetics of dye sorption processes...
The catalytic hydrolysis of dimethyl ether (DME) over H-ZSM-5 was studied by experimental and theoretical studies. We observed from the pack-bed reactor that this reaction yields methanol as product at low temperature (<;300°C), but produces other carbon-containing species at higher temperature (>;300°C). However, these observations cannot give the details of the reaction mechanisms. To clarify...
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