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Microbe produced rhamnolipids are often mixtures containing multicomponent homologues. To understanding the rhamnolipid sorption affected by its homologue compositions is of considerable importance to its application for environmental restorations, including rhamnolipids pump-and-treat for polluted groundwater, rhamnolipids flushing to mobilize hydrophobic contaminants, as well as effects of contaminants...
SCR converters have been used in ships for several years and various types of SCR are available. Although an SCR is very effective for NOx emission, due to progressively stricter emission regulations, the catalytic converter design and performance need to be continuously improved. The design improvement efforts require broadening of fundamental understanding of various physiochemical processes that...
The natural zeolite was investigated as an inexpensive and effective adsorbent for the adsorption of Amido Black 10B, Acid Red and Safranine T from its queous solution respectively. The effect of parameters such as the solution of pH, contact time, the doze of the natural zeolite and the initial concentration of dye was examined. The adsorption isotherm was well fitted to both the Langmuir and Freundlich...
A preparative method of furfural from bagasse catalyzed by the ionic liquid [Hmim] HSO4 (1-Methylimidazolium hydrogen sulfate) was developed in the paper and response surface methodology (RSM) was successfully applied to optimize the process. Central Composite Rotatable Design (CCRD) was employed to search for the optimal furfural yield. By the comparison of hydrolysis results of [Hmim] HSO4 and concentrated...
In this study, Shinnar-Le Roux algorithm is introduced to optimize the selective excitation pulses to meet the needs of slice selection in magnetic resonance imaging technique. Moreover, the SLR pulse can be customized attributes for its good slice profile with no sidelobes and very small rejection ripples. Finally, simulation results of SLR pulses with different flip angles are compared with the...
Analysed the research of groundwater vulnerability assessment worldwide actuality, considered the groundwater system vulnerability should be included in groundwater systems anti-fouling and groundwater system vulnerability.Based on the coupled technique of ANN-GIS, a "Three Chart" method was proposed, the maps of distribution of antipollution and the facility-pollution are compounded, and...
Rapid urbanization has posed a considerable impact on the earth such as environment deterioration and resources degradation. Effectively predicting and evaluating the development trend of urban coordinated degree are key issues for urban sustainable development. In the paper, Important impact factors of coordinated development degree are obtained from grey relational analysis (GRA), and a Radial Basis...
Water quality maintenance is always a focus in a fishpond in order to achieve a high harvest and good scenery. A wetland fishpond in Yingdong Village on Chongming Island, Shanghai has been studied. Through a 2D modeling analysis it is found that the water diversion from the neighboring Yangtze River is feasible and effective. The diversion can be conducted once every 2 months to achieve the desirable...
Non-point source pollution is one of the major problems caused by agricultural activities especially from planting cultivation. This paper describes the application of the Soil and Water Assessment Tool (SWAT) model in agricultural non-point source pollution of the Laohahe River watershed, located in northeast China. This initial hydrologic modeling analysis will facilitate future applications of...
Considered pore pressure of the injection/production around the refracturing well under coupling liquid/solid, Mathematical models were established, which were the maximum principal stress and orientation angle of maximum principal stress induced by pore pressure around refracturing wells. Considered that the initial artificial fracture was full of incompetent and compressible fluid, affection efficient...
Research on cardiopulmonary resuscitation (CPR) has always been important and thus focused on by the medical community. The hemodynamic effects of CPR have a direct impact on the survival rate of and prognosis for patients. Research shows that performing Enhanced External Counter-Pulsation (EECP) on lower limbs during the recoil phase of chest compression improves hemodynamic effects. AEI-CPR is an...
The effects of salinity and humic acid (HA) on di-n-butyl phthalate (DBP) adsorption by nutshell-based activated carbon were studied by batch experiments in this paper. Adsorption kinetics was evaluated. The kinetic curves were almost the same both in the presence and absence of NaCl, and second time adsorption occurred in the presence of HA. Three kinetic models, pseudo-first-order, pseudo-second-order...
This study focused on the characteristics of the removal of Cr(VI)(Cr6+) from wastewater with fly ashes (FAs), a by-product from coal-fired electric power plants. The influences of NaCl dose, pH, agitated time and fly ash (FA) dose (the temperature is 50°Cin the test) were investigated in batch experiments, and the removal of Cr6+ and sorption capacity with modified fly ashes (MFAs) were compared...
Field observations of water and soil loss were carried out at micro-plot scale, USLE (Universal Soil Loss Equation) plot scale and the sub-catchment scale 2000 in the sub-catchment of pine forest. Analysis of these field observation data shows that litter in forest has important hydrological function. In the pine forest, the micro-plot without litter and grass produced 123 times soil loss of that...
A previous study using the batch method showed that sorption behavior of Perchloroethylene (PCE) in low organic content (0.080~0.090 % foc) aquifer sand was nonlinear and fitted the amended dual-mode model (DMM). This study aimed to investigate the transport of PCE in same media using finite duration and continuous input of solute in laboratory column tests. The experiments showed that the transport...
To minimize the damage resulting from oil spill accidents, it is necessary to respond quickly with an appropriate strategy. Accurately forecasting the behavior of the spilled oil is crucial for a successful recovery operation and protection of marine resources. Therefore, the numerical modeling and simulation of the spilled oil at sea plays an important role in the oil spill response and contingency...
Marine water quality model is complicated because of its multi-parameter and multi-response characteristic. In this paper, a new method based on data-driven model (DDM) is developed to retrieve the value of model parameters for model calibration. All training data are calculated by numerical water quality model from results of multi-parameter matching design cases. The basic idea is to find out the...
The total hardness in aquifer often increased rapidly in urban area, and it may caused by the hydrogeochemistry. However it is not clear where the hydrogeochemistry happened in aquifer or in vadose zone. In this paper, mineral dissolution and cation exchange relevant to total hardness were simulated by the hydrogeochemical transport model in order to research the influences of the mineral dissolution...
Poyang Lake collects the water of five rivers (Ganjiang River, Fuhe River, Xinjiang River, Raohe River and Xiushui River) in Jiangxi Province. Therefore, the rainfall of each area of Jiangxi Province has large influence on the water level of Poyang Lake. In order to facilitate the prediction of flooding in the basin and the warning of it beforehand, this paper aims to build a model on the relation...
The river system of Pearl River Delta in China is a typical tidal network and is affected by both the surface runoff and the tide of South Sea. In the 80s of last century, with the speed-up of economy development and urbanization, sand excavation in this district was started. This has led to the great changes of the hydrological conditions and the river fluvial process. According to its hydrodynamics...
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