A5102938718- Soil Carbon and Nitrogen Dynamics
- Pesticide and Herbicide Environmental Studies
- Polymer-Based Agricultural Enhancements
- Chemical Synthesis and Reactions
- Adsorption and biosorption for pollutant removal
- Dam Engineering and Safety
- Soil and Water Nutrient Dynamics
- Geomechanics and Mining Engineering
- Plant nutrient uptake and metabolism
- Legume Nitrogen Fixing Symbiosis
- Manufacturing Process and Optimization
- Clay minerals and soil interactions
- Nanomaterials for catalytic reactions
- Phosphorus and nutrient management
- Agriculture, Soil, Plant Science
- Advanced Measurement and Metrology Techniques
- Advanced Numerical Analysis Techniques
- Geotechnical Engineering and Underground Structures
- Mesoporous Materials and Catalysis
- Geotechnical Engineering and Analysis
- Wastewater Treatment and Nitrogen Removal
- Simulation and Modeling Applications
- Concrete Properties and Behavior
- Soil, Finite Element Methods
- Covalent Organic Framework Applications
Jilin Agricultural University
2019-2024
Beijing Institute of Power Machinery (China)
2021
Beijing Institute of Technology
2015
Guangxi University
2003-2015
Sinopec (China)
2013
Duke University
2001
Using corn stover as raw material, the adsorption mechanism of ammonium nitrogen by biochar prepared different modification methods was studied. The characterized Fourier transform infrared spectroscopy, surface-area analysis and scanning electron microscopy. results showed that NH4+-N modified biochars confirmed quasi-second-order kinetic equation (R2 > 0.95, p ≤ 0.05), isotherms Langmuir ≥ 0.96, 0.05). ΔGθ < 0, ΔHθ 0 indicated a spontaneous endothermic reaction. With increase in...
In this study, the preparation of apricot kernel shell biochar by a hydrothermal method and its adsorption mechanism for atrazine was studied scanning electron microscopy (SEM) infrared spectrum (FTIR) analytical techniques. The results show that prepared from has an evenly distributed, nonaggregated carbon microsphere structure contains large number oxygen-containing groups. higher temperature is, more functional groups exist better potential performance is. kinetics on were fitted with...
For precision mechanical systems, different distribution characteristics of geometric form errors usually lead to assembly contact states, and in turn, are formed, due the propagation accumulation errors. Statistically, a batch part machined by same process possesses identical It is great importance improve accuracy productivity if statistic can be understood. To solve problem, two methods modeling for single parts based on linear combination basis shapes principal component analysis...
Experiments were conducted to study the adsorption kinetics and isothermal mechanism of nitrification inhibitor nitrapyrin onto black soil northeastern China. The fitted with a quasi-second-order equation before after organic matter removal (R2 ≥ 0.8320, p < .05). isotherm was obtained by Langmuir 0.9400, Isothermal requires less energy is spontaneous endothermic reaction an L-type curve (n > 1), dominated surface physical adsorption. With decrease content in soil, nitrapyin changed from...
Modern rice production systems need a reliable, easy-to-use, efficient, and environmentally-friendly method to determine plant nitrogen (N) status , predict grain yield, optimize N management. We conducted field experiments the influence of different rates on Soil Plant Analysis Development (SPAD) readings leaves. also performed validations evaluate yield use efficiency under recommended rates. Our results showed that leaf SPAD increased as increased. applied based relationships between at...
The nitrapyrin was easily adsorbed by soil, but most current studies have focused on comparing the effects of application at different soil organic matter levels and in types. adsorption kinetics isotherm nitrification inhibitor black chernozem planosol were studied this paper. fitted quasi-second-order kinetic equation ( R 2 ≥ 0.8907, p < 0.05) with a lower acting energy E 8.0 kJ mol −1 ). Langmuir 0.9400 * , 0.05). mechanism determined to involve spontaneous endothermic reaction...
Nitrification inhibitors (NIs) have been widely applied to inhibit nitrification and reduce N2O emissions in agriculture. However, there are still some shortcomings, e.g. short effective periods, large applying amounts, low effectiveness, easy deactivation different effect. Thus, a nitrapyrin microcapsule suspension (CPCS) was used as new experimental material elaborate its effects on nitrogen transformation microbial response mechanisms black soil by cultivation experiments with six...
Purpose The modern manufacturing industry has put forward higher requirements for the assembly accuracy of components with development industrial technology. For precision assembly, traditional process study based on tolerance had difficulty in meeting these requirements. Hence, distribution form errors must be considered. registration between two mating surfaces determines parts’ position, and is basis prediction control accuracy. This aims to provide a new method which takes into...
The compound nitrapyrin is easily adsorbed by soil organic matter in high-organic soils, and this results its effectiveness reducing significantly. In study, the adsorption characteristics mechanisms of as an adsorptive on humic acid (HA) fulvic (FA) adsorbents were investigated. showed that kinetics both HA FA followed pseudo-second-order kinetic models (R 2 ≥ 0.925, P < 0.05) process included initial fast-adsorption stage a slow-adsorption thereafter. efficiencies + higher than or alone,...
In this study, cornstalk was pyrolysed to obtain hydrochar (HC), which used remove mesotrione from aqueous solutions. HC characterization and batch experiments were conducted investigate adsorption the underlying mechanism. The revealed microspheres on surface. FT-IR spectra showed that contained a large number of –OH groups, C=C bonds aromatic rings, C–H groups in rings phenolic C–O bonds. results ability gradually increased as preparation temperature increased. quasi-second-order kinetic...
Straw return is a common cultivation to improve soil fertility and realize sustainable agricultural development. However, the effect of returning interval on corn straw humification process in northeast China little known. In this study, four-year field trial was conducted investigate characteristics carbon sequestration under annual deep (T1), biennial (T2), non-straw (T3) Jilin Province, China. order precisely evaluate organic density (SOCD), each horizon divided differently according...
This paper presents research on the abutment forces of a double-curvature arch dam during overload based numerical calculation results obtained through finite element method by Ansys. Results show that, with an increase in elevation, and bending moment first then decrease from bottom to top dam. Abutment reach their maximum at middle or middle-down portion The distributions do not change overload. magnitude each layer’s increases linearly result indicates that layer transmits bearing loads...
Ultrasonic imaging for the detection of breast tumors is an important technique to complement existing x-ray mammography. The potential advantages ultrasound stems mainly from relatively high contrast acoustic properties between and normal tissue. However, this also increases difficulty forming accurate image because increased multiple scattering. To address issue, we have developed fast forward methods based on a combination extended Born approximation, conjugate- biconjugate-gradient...