The effective removal of humic acid is an important factor influencing the quality of treated waters. Adsorption is one of major techniques used for the removal of humic acid. This study demonstrated that modified cla...The effective removal of humic acid is an important factor influencing the quality of treated waters. Adsorption is one of major techniques used for the removal of humic acid. This study demonstrated that modified clays could be used as alternatives to activated carbons for adsorbing humic acid. Both Al-Fe modified and Fe modified clays had high affinity to humic acid and then high removal efficiency. Al-modified clay had less removal capacity for adsorbing humic acid. Mathematics formulas were developed to predict the adsorption performance of modified clays for the humic acid removal via the parameters of UV254 absorbance and DOC concentrations. The optimal clay dose could be predicted using the developed model. The F test was used to validate the model developed by examining if it fells into the reject field. The reject field varied according to each F test. The results showed that the model developed was 99% confident and can be used to perform the simulation.展开更多
We propose a monomer adsorption model, in which only the monomers are allowed to diffuse and adsorb onto other clusters. By means of the generalized rate equation we investigate the kinetic behavior of the system with...We propose a monomer adsorption model, in which only the monomers are allowed to diffuse and adsorb onto other clusters. By means of the generalized rate equation we investigate the kinetic behavior of the system with a special rate kernel. For the system without monomer input, the concentration aj（t） of the Aj clusters （j 〉 1） asymptotically retains a nonzero quantity, while for the system with monomer input, it decays with time and vanishes finally. We also investigate the kinetics of an interesting model with fixed-rate monomer adsorption. For the ease without monomer source, the evolution of the system will halt at a finite time; while the system evolves infinitely in time in the case with monomer source. Finally, we also suggest a connection between the fixed-rate monomer adsorption systems and growing networks.展开更多
The discrete three-dimensional model of the adsorption-diffusion process was developed with three states using the comers of blocks within the framework of the theory of CA （cellular automata）. The construction of a...The discrete three-dimensional model of the adsorption-diffusion process was developed with three states using the comers of blocks within the framework of the theory of CA （cellular automata）. The construction of an asynchronous cellular automaton was used for the modeling, The implementation of the algorithm leads to a huge variety of dynamical regimes some of which are moving from the general chaos into a state of local and then global synchronization （within the framework of the model）.展开更多
以某采用吸附法模拟移动床技术新建的单系列1.5 Mt a对二甲苯芳烃联合装置(其公用工程依托企业原有设施)为举例装置,针对全厂事故停电时,原有火炬系统的接收能力仅有500 t h,不能满足需求的问题,分别对装置中二甲苯塔、抽出液塔、重整...以某采用吸附法模拟移动床技术新建的单系列1.5 Mt a对二甲苯芳烃联合装置(其公用工程依托企业原有设施)为举例装置,针对全厂事故停电时,原有火炬系统的接收能力仅有500 t h,不能满足需求的问题,分别对装置中二甲苯塔、抽出液塔、重整油分馏塔实施高完整性保护系统(HIPS)措施,并对抽余液塔采用夹点设计优化,从而大幅度降低装置的火炬排放量。结果表明,应用HIPS和夹点技术后,装置火炬排放量从常规时的3790 t h降低到438 t h,满足了项目全厂事故停电时的火炬排放要求。展开更多
The adsorptive precipitation between eosin Y （EY） and AgCl colloids at pH 3.73 caused the sensitive color change of the solution. The reaction mechanism between EY and AgCl was analyzed and this reaction was used fo...The adsorptive precipitation between eosin Y （EY） and AgCl colloids at pH 3.73 caused the sensitive color change of the solution. The reaction mechanism between EY and AgCl was analyzed and this reaction was used for determination of Cl^- in trace level by the light-absorption radio variation approach.展开更多
文摘The effective removal of humic acid is an important factor influencing the quality of treated waters. Adsorption is one of major techniques used for the removal of humic acid. This study demonstrated that modified clays could be used as alternatives to activated carbons for adsorbing humic acid. Both Al-Fe modified and Fe modified clays had high affinity to humic acid and then high removal efficiency. Al-modified clay had less removal capacity for adsorbing humic acid. Mathematics formulas were developed to predict the adsorption performance of modified clays for the humic acid removal via the parameters of UV254 absorbance and DOC concentrations. The optimal clay dose could be predicted using the developed model. The F test was used to validate the model developed by examining if it fells into the reject field. The reject field varied according to each F test. The results showed that the model developed was 99% confident and can be used to perform the simulation.
基金Supported by the National Natural Science Foundation of China under Grant Nos. 10775104 and 10305009
文摘We propose a monomer adsorption model, in which only the monomers are allowed to diffuse and adsorb onto other clusters. By means of the generalized rate equation we investigate the kinetic behavior of the system with a special rate kernel. For the system without monomer input, the concentration aj（t） of the Aj clusters （j 〉 1） asymptotically retains a nonzero quantity, while for the system with monomer input, it decays with time and vanishes finally. We also investigate the kinetics of an interesting model with fixed-rate monomer adsorption. For the ease without monomer source, the evolution of the system will halt at a finite time; while the system evolves infinitely in time in the case with monomer source. Finally, we also suggest a connection between the fixed-rate monomer adsorption systems and growing networks.
文摘The discrete three-dimensional model of the adsorption-diffusion process was developed with three states using the comers of blocks within the framework of the theory of CA （cellular automata）. The construction of an asynchronous cellular automaton was used for the modeling, The implementation of the algorithm leads to a huge variety of dynamical regimes some of which are moving from the general chaos into a state of local and then global synchronization （within the framework of the model）.
文摘以某采用吸附法模拟移动床技术新建的单系列1.5 Mt a对二甲苯芳烃联合装置(其公用工程依托企业原有设施)为举例装置,针对全厂事故停电时,原有火炬系统的接收能力仅有500 t h,不能满足需求的问题,分别对装置中二甲苯塔、抽出液塔、重整油分馏塔实施高完整性保护系统(HIPS)措施,并对抽余液塔采用夹点设计优化,从而大幅度降低装置的火炬排放量。结果表明,应用HIPS和夹点技术后,装置火炬排放量从常规时的3790 t h降低到438 t h,满足了项目全厂事故停电时的火炬排放要求。
基金National Natural Science Foundation of China(No.20477030).
文摘The adsorptive precipitation between eosin Y （EY） and AgCl colloids at pH 3.73 caused the sensitive color change of the solution. The reaction mechanism between EY and AgCl was analyzed and this reaction was used for determination of Cl^- in trace level by the light-absorption radio variation approach.
