摘要：
Batch experiments were conducted under static and dynamic conditions respectively to explore the mechanism and kinetics of U(VI) immobilization by zerovalent iron (ZVI) and the impact of pyrite. The dynamic results suggest that the U(VI) immobilization reaction by ZVI shows pseudo-first order with respect to U(VI) concentration. When the initial U(VI) concentration increased from 50 to 300mg/L at a fixed ZVI loading (2%), the rate constantly decreased from 0.1776 h(-1) to 0.0177 h(-1). The static results show that ZVI system removed U(VI) very quickly whereas the FeS(2) system did the most slowly. As for the ZVI+ FeS(2) system, the U(VI) immobilization process was significantly inhibited in the presence of pyrite. The fixation of U(VI) may chiefly rely on the chemical reduction under dynamic conditions, but on the coprecipitation with iron corrosion products under static conditions. The latter process was also associated with pyrite lowering the system pH and controlling the amount of iron oxide.
通讯机构：
Key Laboratory of Functional Organometallic Materials of Hunan Province College, Department of Chemistry and Material Science, Hengyang Normal University, China
作者机构：
[Deng, Yi-Fang; Kuang, Dai-Zhi; Zhang, Chun-Hua; Chen, Man-Sheng] Hengyang Normal Univ, Key Lab Funct Organometall Mat, Dept Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.
通讯机构：
[Chen, Man-Sheng] H;Hengyang Normal Univ, Key Lab Funct Organometall Mat, Dept Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.
摘要：
Article Crystal structure of diaqua(bis(3,5-bis(isonicotinamido))- benzoato)nickle(II) tetrahydrate, Ni(H2O)2(C19H13N4O4)2 · 4H2O was published on June 1, 2010 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 225, issue 2).
作者机构：
[Deng, Yi-Fang; Kuang, Dai-Zhi; Tan, Xiong-Wen; Chen, Man-Sheng] Hengyang Normal Univ, Key Lab Funct Organometall Mat, Dept Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.
通讯机构：
[Kuang, Dai-Zhi] H;Hengyang Normal Univ, Key Lab Funct Organometall Mat, Dept Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.
摘要：
Article Crystal structure of diaqua-bis(3,5-bis(isonicotinamido)benzoato)- cobalt(II) tetrahydrate, Co(H2O)2(C19H13N4O4)2 · 4H2O was published on June 1, 2010 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 225, issue 2).
作者机构：
[Deng, Yi-Fang; Kuang, Dai-Zhi; Chen, Man-Sheng; Zhang, Chun-Hua] Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Funct Organometall Mat, Hengyang 421008, Hunan, Peoples R China.
通讯机构：
[Chen, Man-Sheng] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Key Lab Funct Organometall Mat, Hengyang 421008, Hunan, Peoples R China.
摘要：
Article Crystal structure of (bis(4-((1H-imidazol-1-yl)-methyl)benzoato)zinc(II), Zn(C11H14N2O2)2 was published on March 1, 2010 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 225, issue 1).
摘要：
Batch experiments were conducted to investigate the kinetics of uranyl removal by zerovalent iron (ZVI) as well as the impact of environmental factors on this process. The result suggests that the aqueous uranyl cations can be reductively removed by ZVI. The uranyl immobilization was little affected by reaction temperature, indicating that this process was a chemical-controlled reaction mediated by the iron surface. The uranyl removal rate increased with decreasing pH at acidic pH. The uranyl fixation by ZVI followed first-order kinetics with regard to ZVI at low iron amendments and zero-order kinetics with regard to ZVI at high iron amendments.
作者机构：
[Kuang, Yun-Fei; Yang, Ying-Qun; Li, Wei] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Li, Chang-Hong] Hunan Inst Technol, Dept Mat & Chem Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Yang, Ying-Qun] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
摘要：
Article Crystal structure of aqua(2,2′-bipyridine-κ2N,N′)-bis((2,4-dichlorophenoxyacetato- κO)copper(II), Cu(H2O)(C10H8N2)(C8H5Cl2O3)2 was published on June 1, 2010 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 225, issue 2).
作者机构：
[Deng, Yi-Fang] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[Deng, Yi-Fang] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
摘要：
Article Crystal structure of catena-aqua(bis(1,3,5-tris(1-imidazolyl)- benzene))zinc(II) perchlorate, [Zn(C15H12N6)2(H2O)](ClO4)2 was published on June 1, 2010 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 225, issue 2).
摘要：
One new complex Cd2(2,4-DAA)4(2,2′-bipy) 2 with 2,4-dichlorophenoxy acetic acid (2,4-DAA) and 2,2′ - bipyridine (2,2′-bipy) as ligands has been synthesized and characterized. Crystal data for this complex are as follows: monoclinic, space group P1̄, α= 1.049 9(2) nm, 6 = 1.094 2(2) nm, c = 1.185 7(2) nm, α=96.70(3)°, β=105.20(3)°, γ= 91.75(3)°, V=1.303 0(5) nm3, Dc= 1.806 g · cm-3, Z=2, μ(Mo K α)=1.295 mm-1, F(000)=704, final discrepancy factors R1 =0.042 1, wR2 = 0.102 1. In the crystal, two neighboring Cd(II) ions are bridged by four 2,4-dichlorophenoxy acetic radicals, and their end positions are coordinated with two 2,2′-bipyridine molecules, forming a binuclear cage structure. The coordination environment of each cadmium (II) ion is CdO4 N2, giving a distorted triprism coordination geometry. Luminescent property and the cyclic voltammetric behavior of the complex were investigated.
摘要：
Two Cu(II) complexes [Cu(INAIP)(bbi)]·5H2O (1) and [Cu(INAIP)(phen)(H2O)]·H2O (2) were obtained by hydrothermal reactions of CuCl2·2H2O with 5-(isonicotinamido) isophthalic acid (H2INAIP) and N-donor ligands of 1,1′-(1,4-butanediyl)-bis(imidazole) (bbi) and 1,10-phenanthroline (phen), respectively. Both compounds crystallize in monoclinic space group C2/c. Single crystal X-ray diffraction analysis revealed that the bbi ligands connect [Cu(INAIP)] ID chains to form 2D bi-layers in complex 1, while complex 2 displays a ID chain structure, extending to 2D net through the π-π interactions. Complexes 1 and 2 are finally extended to 3D supramolecular structures by hydrogen bonding interactions. In addition, the magnetic property of complexes 1 and 2 has been investigated in the temperature range of 1.8~300 K, and the results show the weak antiferromagnetic interactions between the two Cu(II) ions bridged by carboxylate groups in 1, and the paramagnetic behavior of 2. CCDC: 781788,1; 781789, 2.
摘要：
Four new inorganic-organic hybrid frameworks [Mn(L)(H2O)(2)](n) (1), {[Co(L)(H2O)(3)]center dot 2H(2)O-CH3OH}(n) (2), {[Zn(L)(H2O)]center dot H2O) (3) and [Cd(HL)(2)](n) (4) [H2L = 4-(isonicotinamido)phthalic acid] have been synthesized and characterized by single-crystal X-ray diffraction analysis. Complex 1 has three-dimensional (3D) structure and topology related to SrAl2 (sra) with Schlafli symbol of (4(.)(2)6(3).8). And 2 displays (3,3)-connected two-dimensional (2D) network with (4.8(2)) topology, while 3 exhibits a uninodal (3,3)-connected (6,3) 2D network, which is further linked by N-H center dot center dot center dot O hydrogen bonding interactions to give 3D structure with hms topology and Schlafli symbol of (6(3))(6(9).8). Complex 4 with partial deprotonated HL- ligands also has a 2D network structure. In addition, the magnetic property of 1, nonlinear optical property of 3 and photoluminescence of 3 and 4 were investigated. (C) 2010 Elsevier Ltd. All rights reserved.
摘要：
Microbiological reduction of uranyl by sulfate reducing bacteria (SRB) has been proposed as a promising method for removal of radionuclide from groundwater. In this study, we examined the effect of two naturally occurring Fe(III) (hydr)oxides, hematite and goethite, on the bioreduction of U(VI) by a mixed culture of SRB via laboratory batch experiments. The biogenic precipitate from U(VI) bioreduction was determined using X-ray absorption near edge structure (XANES) analysis, showing a typical feature of uraninite (UO(2)). In the presence of either hematite or goethite-containing Fe(III) ranging from 10 to 30 mM, the reduction of U(VI) was retarded by both minerals and the retardatory effect was enhanced with increasing amount of Fe(III) (hydr)oxide. When exposed to a mixture of hematite and goethite with the total Fe(III) kept constant at 20 mM, the retardatory effect on U(VI) reduction by the minerals were directly correlated with the fraction of hematite present. A slow increase in U(VI) concentration was also found in all Fe(III) (hydr)oxide treatments after 10-13 days, accompanied by the release of Fe(II) into the solution. The presence of Fe(III) (hydr)oxide can cause the eventual incomplete bioreduction of U(VI). However, it was not the case for the control without minerals. When mixing biogenic uraninite with hematite or goethite without SRB, Fe(II) was also detected in the solution. These findings suggest that the U(VI) remobilization after 10-13 days may be due to reoxidation of the uraninite by the solid-phase Fe (III) (hydr)oxide. (C) 2010 Elsevier Ltd. All rights reserved.
