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Syntheses,Crystal Structures and Characterization of Two Zeotype Crystals of K_4Cr_3O(H_2O)_3(OOCH)_6]_2[P_2W_(18)O_(62)]·9.5H_2O and K_4[Cr_3O(H_2O)_3(OOCH)_6]· [H_3P_2W_(17) Co(H_2O)O_(61)·20H_2O

引用

Chemical Research in Chinese Universities 2007年第1期23卷 8-13页

作者： ZHANG Xin YOU Wan-sheng ZHU Zai-ming DANG Li-qin SUN Zhen-gang ZHENG Xue-fang Institute of Chemistry for Functionalized Materials Faculty of Chemistry and Chemical Engineering Liaoning Normal University Dalian 116029 P. R. China Liaoning Key Laboratory of Bio-organic Chemistry Dalian University Dalian 116622 P. R. China

Two novel zeotype crystals, K4[Cr30（H2O） 3（OOCH） 6] 2[ P2W18O62]· 9.5H2 O and K4[ Cr3O（ H2O）3（ OOCH）6 ]2[ H3 P2 W17Co（H2O） O61]· 20H2O（2） , were synthesized and their structures were determined using X-ray single crystal diffraction. Crystal data： C12H43O103.5K4Cr6P2W18（1）, hexagonal P6（3）/m, α= 1. 5895（2） nm, b=1.5895（2） nm, c =2.1620（4） nm, α=90°, β=90°, γ= 120°, V=4.7305（13） nm^3, Z=2, R1 =0,0726, ωR2 =0. 1542; C6H57O98K4Cr3CoP2W17 （2）, hexagonal P6（3）/mmc, α = 1.61328（3） nm, b = 1.61328（3） nm, c=2.06613（9） nm, α=90°, β=90°, γ=120°, V=4.6570（2） nm^3, Z=2, R1 =0.0377, ωR2 =0. 1070. These crystals were characterized using elemental analysis, IR, TG-DTA, and XRD. It was found that the polyoxometalate anions maintained Wells-Dawson structure for crystal I and laeunary Wens-Dawson structure for crystal 2. Thermal analysis showed that crystal 1 lost the water of crystallization at 132 ℃, whereas crystal 2 lost the water of crystallization at 100 ℃. Crystal 1 could reversibly desorb and adsorb water molecules and its crystal structure could be restored after re-adsorbing the water molecules. It was also found from the XRD patterns that the void size of crystal 2 is smaller compared with that of crystal 1, which is attributed to the higher anion charges.

关键词： Zeotype reversible adsorption Dawson structure Tungstophosphate

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Effect of Granular Activated Carbon on the Enhancement of Cometabolic Biodegradation of Phenol and 4-Chlorophenol

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Tsinghua Science and Technology 2010年第5期15卷 580-585页

作者：李轶饶婷刘志刚 Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education College of Environmental Science and Engineering Hohai University State Key Laboratory of Pollution Control and Resources Reuse Nanjing University

Enhancement of the cometabolic biotransformation of 4-chlorophenol（4-cp） and phenol were studied using chemically and thermally granular activated carbons（GACs）.It was found that both chemically activated and thermally activated GAC effectively adsorb phenol and *** than 80% adsorped substrates were later desorpted,showing a reversible sorption behaviour in the *** each activated carbon type,4-cp was preferentially adsorbed over phenol and the desorption efficiencies of both phenol and 4-cp were found to increase linearly with the initial mass of adsorbate in the *** biodegradation of 500 mg/L phenol by Pseudomonas putida took 24 h while the biodegradation of 4-cp took 32 *** during the cometabolic biodegradation of 4-cp and phenol were alleviated by the addition of the *** system with chemically-activated coconut type GAC had better system stability over thermally-activated peat type *** results show that GAC can be regenerated by the cells enhancement of the cometabolic biotransformation of 4-cp and phenol can be accomplished using chemically-activated coconut type GAC.

关键词： activated carbon activation method cometabolism 4-chlorophenol reversible adsorption phenol

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