http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Removal of Pb2+ from the aqueous solution by tartrate intercalated layered double hydroxides
Yanming Shen,Xiaolei Zhao,Xi Zhang,Shifeng Li,Dongbin Liu,Lihui Fan 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.1
Adsorption of Pb2+ ion by a tartrate intercalated MgAl layered double hydroxides (MgAl-TA LDHs) was studied. The adsorption isotherms and kinetics were investigated as a function of various experimental parameters using batch adsorption experiments. The results indicated that the adsorption isotherm was well described by Sips model. The kinetic adsorption data were fitted well to the pseudo-second-order kinetic equation. The adsorption of Pb2+ was controlled mainly by the chemical process combined with intraparticle diffusion. Parameters of adsorption thermodynamic suggested that the interaction of Pb2+ adsorbed by MgAl-TA LDHs adsorbents was thermodynamically spontaneous and endothermic.
A review of the current in-situ fouling control strategies in MBR: Biological versus physicochemical
Qiang Liu,Jiayao Ren,Yongsheng Lu,Xiaolei Zhang,Felicity A. Roddick,Linhua Fan,Yufei Wang,Huarong Yu,Ping Yao 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.98 No.-
Fouling in membrane bioreactors (MBR) is a bottleneck problem limiting their application. In-situfouling control strategies have been continuously developed for decades, and can be mainlycategorized as biological and physicochemical approaches. However, the mechanisms and performanceof these methods as well as their application prospects have not been thoroughly discussed andcompared in a systematic manner. This study was aimed at providing a detailed review on the variousin-situ biological and physicochemical methods in terms of fouling control performance, foulingreduction mechanisms and practicability. This involves a comparison of the popular biological controlstrategies including quorum quenching (QQ)) and physicochemical approaches such as NaClObackflushing, hybrid electrochemical MBR and anti-biofouling membrane development, with theanalysis of their potential, existing issues and practicality in full-scale applications. Future work is alsorecommended for developing more sustainable and more widely applicable MBR fouling controlstrategies.
Wenhui Guo,Shuhu Guo,Xu Zhao,Zhenjun Yuan,Yu Zhao,Xin Chang,Hong Li,Xiong Zhao,Ye Wan,Dazhou Yan,Zhongyuan Ren,Xiaolei Fan,Xin Gao 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-
Ultra-high-purity (UHP) electronic-grade octamethylcyclotetrasiloxane (D4) is the key precursor of lowdielectricconstant (low-k) SiCOH films to manufacture integrated circuits (IC), meeting the stringentrequirements of the rapidly developing semiconductor industry. Commonly, metallic impurities in D4were removed by multiple unit operations of adsorption, filtration, and distillation, which could reducethe concentration of a single metallic impurity below 1 ppb. However, D4 with higher purity is requiredby semiconductor production due to an increase in transistor density. Herein, a novel method based onthe integrated simultaneous distillation–extraction (SDE) was developed for manufacturing UHPelectronic-grade D4. The lab and pilot scale experiments showed that the purity of water and D4 has apositive correlation. Based on the experimental data, a double-column process, consisting of azeotropic/extractive distillation column and precision distillation column with UNIQUAC method, was establishedto access the feasibility of scaling up the SDE process. According to the simulation results, D4with the purity > 99.999 wt.% and total metallic impurities (TMI) content below 1 ppb could be obtainedusing ultra-pure water.