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Chao Bao,Lincheng Zhou,Yanming Shao,Qiong Wu,Hao Zhu,Ke Li 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.38 No.-
In the present study, Au-loaded magnetic metal organic frameworks (MOFs)/graphene multifunctionalcomposite were prepared. The well-dispersed nanoparticles were stabilized with 2D reduced grapheneoxide and MOFs, which acts as effective substitutes for more conventional polymer ligands that are usedto stabilize nanoparticles in a sol-immobilization procedure. The result shows the multifunctionalcomposite could overcome the drawbacks of MOFs catalysts (chemical instability). This study indicatedthat the as-prepared Au-loaded magnetic MOFs/graphene multifunctional composite has great potentialfor using in a wide range of applications.
Xiaoli Li,Yaolong Wang,Yanfeng Li,Lincheng Zhou,Xiaoning Jia 한국생물공학회 2011 Biotechnology and Bioprocess Engineering Vol.16 No.4
Multiple microorganisms directly or treated with NaOH were immobilized by using Ca-alginate embedding to form biosorbents I and II, successively. The biosorption behaviors of biosorbents I and II for Pb(II)from aqueous solution were investigated in a batch system. Effects of solution pH, initial metal concentration, biosorbent dosage, contact time, temperature, and ionic strength on the adsorption process were considered to study the biosorption equilibrium, kinetics, thermodynamics, and mechanism of Pb(II) ion adsorption on the 2 types of biosorbents. The results showed that the adsorption capacity of biosorbent II for Pb(II) was higher than that of biosorbent I, and biosorbent II had a faster adsorption rate for Pb(II) ions. According to FTIR spectra, the carboxyl,amine, and hydroxyl groups on the biomass surface were involved in the biosorption of Pb(II). EDX analysis showed that ion exchange may be involved in the biosorption process, and the morphology observed by SEM micrograph of biosorbent I was completely different from that of biosorbent II. Desorption and regeneration experiments showed that the 2 types of biosorbents could be reused for 3 biosorption-desorption cycles without significant loss of their initial biosorption capacities.
Qiong Wu,Minna Li,Zheng Huang,Yanming Shao,Lei Bai,Lincheng Zhou 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.60 No.-
Magnetic molecular imprinted polymers (MIPs) with well-defined core–shell nanostructure for extracting tetrabromobisphenol A (TBBPA) have been fabricated by surface molecular imprinting method. Fe3O4@SiO2@MIPs exhibit the good adsorption capacity, high recognition ability and fast kinetics to TBBPA. The maximum adsorption capacity of Fe3O4@SiO2@MIPs towards TBBPA is 88.3 mg g−1, which is 2.3 times as high as that of Fe3O4@SiO2@NIPs. Besides, the material has the short equilibrium time (40 min), the rapid magnetic separation (15.6 emu g−1, 20 s) and the high stability (the adsorption efficiency is at least 85% after seven cycles).
Zhengfang Ye,Lili Cui,Qingqiang Meng,Haitao Bi,Lincheng Zhou 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.9
We studied the simultaneous removal of Pb(II) and chemical oxygen demand (COD) from synthetic solutions using immobilized microorganism. The immobilized microorganisms on polyurethane foam (IPUF) were successfully prepared by cultivating the microbe B350 in a mixture of culture medium and polyurethane foam (PUF). The adsorption of Pb(II) ion from aqueous solutions onto PUF and IPUF was studied by batch adsorption. IPUF exhibited high Pb(II) removal efficiency. When 0.12 g of IPUF was used to treat 50mL of 20mg/L P(II) solution at pH 7.0 and 25 oC for 120 mins, the removal ratio was 80%. The biosorption kinetics could be described by the pseudo-secondorder model, and the adsorption isotherms could be described by Langmuir and Freundlich equations. In addition, for synthetic wastewater containing Pb(II) and C6H12O6, the removal ratios of Pb(II) and COD after being treated by IPUF for 8 hours were 92.0% and 84.2%, respectively. The removal ratio of COD clearly decreased with the increase of Pb(II)concentration, meaning that Pb(II) was toxic to the mobilized microorganisms and lower Pb(II) concentration was preferred.