This paper describes the potential of heterogeneous catalytic ozonization of sulfo-salicylic acid (SSal). It was found that catalytic ozonization in the presence of Mn-Zr-O (a modified manganese dioxide supported on ...This paper describes the potential of heterogeneous catalytic ozonization of sulfo-salicylic acid (SSal). It was found that catalytic ozonization in the presence of Mn-Zr-O (a modified manganese dioxide supported on silica gel) had significantly enhanced the removal rate (72%) of total organic carbon (TOC) compared with that of ozonization alone (19%). The efficient removal rate of TOC was probably due to increasing the adsorption ability of catalyst and accelerating decomposition of ozone to produce more powerful oxidants than ozone. .展开更多
Ⅰ. INTRODUCTIONThe coordination of H3SSA and metal ion in aqueous solution has been studied widely for a long time. S. B. Pirkes et al. prepared RE<sub>2</sub>（HSSA）<sub>3</sub>·nH<s...Ⅰ. INTRODUCTIONThe coordination of H3SSA and metal ion in aqueous solution has been studied widely for a long time. S. B. Pirkes et al. prepared RE<sub>2</sub>（HSSA）<sub>3</sub>·nH<sub>2</sub>O complexes (HSSA<sup>2-</sup>: negative divalent ion n=15—18 ) by reacting rare earth carbonate with H<sub>3</sub>SSA. N. S. Poluektov suggested that the coordination ratio of H<sub>3</sub>SSA to some rare earth in solvent is 1: 1. In this note, a synthetic method different from that in literature is used to prepare com-展开更多
Molecular dynamics simulation was adopted to study the interaction between sulfosalicylic acid and aluminum,lanthanum and yttrium,and adsorption on kaolinite surfaces.A complexation reaction occurs between sulfosalicy...Molecular dynamics simulation was adopted to study the interaction between sulfosalicylic acid and aluminum,lanthanum and yttrium,and adsorption on kaolinite surfaces.A complexation reaction occurs between sulfosalicylic acid and aluminum,with an interaction energy of-10472.05 kJ/mol.O—Al covalent bonds are formed with a peak value of 7.93,while there is only weak adsorption between sulfosalicylic acid and rare earth ions.A hydrogen bonding reaction with 13605.82 kJ/mol energy occurs between sulfosalicylic acid and the surface of kaolinite(100).Thus,sulfosalicylic acid can form a complex with free aluminum ions,and can also be adsorbed on kaolinite by hydrogen bonding with aluminum in kaolinite(100)surfaces.Leaching of ion-adsorbed type rare earth ore was performed with aluminum inhibited,results show that when sulfosalicylic acid dosage increases from 0 to 0.15 wt%,aluminum ion concentration in the leaching solution decreases from 273.23 to 47.19 mg/L.And the effect of leaching pH value on the effect of sulfosalicylic acid on aluminum inhibition was studied,the result shows that,when the leaching pH value is 4.0—5.0,the rare earth leaching rate and the aluminum ion concentration basically remain unchanged.The molecular dynamics simulation results were verified by detection and analysis of XPS and SEM.展开更多
The complex Tb(SSA)·H 2O (1) and Tb 2.5 La (SSA) 3.5 ·7H 2O (2), TbY(SSA) 2·2H 2O (3), Tb 1.5 Gd(SSA) 2.5 ·4H 2O (4), TbGd 1.5 (SSA) 2.5 ·3H 2O (5), TbGd 2.5 ...The complex Tb(SSA)·H 2O (1) and Tb 2.5 La (SSA) 3.5 ·7H 2O (2), TbY(SSA) 2·2H 2O (3), Tb 1.5 Gd(SSA) 2.5 ·4H 2O (4), TbGd 1.5 (SSA) 2.5 ·3H 2O (5), TbGd 2.5 (SSA) 3.5 ·4H 2O (6), TbGd 3(SSA) 4·5H 2O (7), Tb 10.5 Cu 3(SSA) 12.5 ·30H 2O (8), (NH 4) 1.5 TbLa(SSA) 2.5 ·4H 2O (9), and (NH 4)Tb 2Cu(SSA) 3·6H 2O 10 (H 3SSA= sulfosalicylic acid ), were obtained by reacting ammonium sulfosalicylate with terbium chloride; or with the mixed solution of TbCl 3 and RECl 3 (or CuCl 2) (RE=La, Gd or Y). The compositions of these complexes and the fact that complexes 2～10 can be heteronuclear complexes or sosoloid from complexes and not usual mixture was confirmed by element analysis, IR, TGA and fluorescence analysis. Their luminescent properties were studied in a dimethyl sulfoxide(DMSO) solution (concentration: 1×10 -3 and 1×10 -4 mol·dm -3 ), and some infrequent results were obtained as follows: include, discovery of a synergistic effect between Tb 3+ and Cu 2+ in the 8; observation of the fluorescence quenching effect of NH 4 + in the 9 and 10; the fact that the fluorescence of the mixture of Tb(SSA) and Gd(SSA) (molar ratio 1∶1.5) is more intense than that of complex 1; and the influence of the DMSO on fluorescence enhances effect for the solutions of complexes in DMSO.展开更多
The reaction of 5 sulfosalicylic acid (H 3 SSA) with o phenanthroline (Phen), NaOH, and MCl 2 (M=Zn, Cu) affords Zn(H SSA)(Phen)(H 2O) 2 (1) and Cu(H SSA)(Phen)(H 2O) 2 (2), respectively. Compounds 1 an...The reaction of 5 sulfosalicylic acid (H 3 SSA) with o phenanthroline (Phen), NaOH, and MCl 2 (M=Zn, Cu) affords Zn(H SSA)(Phen)(H 2O) 2 (1) and Cu(H SSA)(Phen)(H 2O) 2 (2), respectively. Compounds 1 and 2 are characterized by elemental analysis, IR, fluorescence spectra and single crystal X ray diffraction analysis. The X ray diffraction analyses reveal that compounds 1 and 2 are isostructure. The 5 sulfosalicylic acid ligand loses two protons at the sulfo group and carboxylic group during the reaction. The Zn(II) and Cu(II) ions are six coordinated and adopt distorted octahedral geometry, which are surrounded by two N atoms from Phen, two O atoms from two water molecules, one O atom from —SO 3 group and one oxygen from carboxylic group of the other H SSA. Compounds 1 and 2 have unprecedented one dimensional linear chain formed by a repeating mononuclear structural unit, which is bridged by H SSA. The fluorescence intensity of 1 and 2 is stronger than that of Phen and H 3 SSA at 400 nm. The lowest excited single states of these complexes are assigned as mainly Phen localized 1(π,π *). The antibacterial activity test shows that compounds 1 and 2 strongly inhibit the growth of Streptococcus haemolyticus, Straphylococcus aureus and Escherichia coli .展开更多
基金The project was supported by the National Natural Science Foundation of China(No.29877024)
文摘This paper describes the potential of heterogeneous catalytic ozonization of sulfo-salicylic acid (SSal). It was found that catalytic ozonization in the presence of Mn-Zr-O (a modified manganese dioxide supported on silica gel) had significantly enhanced the removal rate (72%) of total organic carbon (TOC) compared with that of ozonization alone (19%). The efficient removal rate of TOC was probably due to increasing the adsorption ability of catalyst and accelerating decomposition of ozone to produce more powerful oxidants than ozone. .
基金Project supported by the National Natural Science Foundation of China.
文摘Ⅰ. INTRODUCTIONThe coordination of H3SSA and metal ion in aqueous solution has been studied widely for a long time. S. B. Pirkes et al. prepared RE<sub>2</sub>（HSSA）<sub>3</sub>·nH<sub>2</sub>O complexes (HSSA<sup>2-</sup>: negative divalent ion n=15—18 ) by reacting rare earth carbonate with H<sub>3</sub>SSA. N. S. Poluektov suggested that the coordination ratio of H<sub>3</sub>SSA to some rare earth in solvent is 1: 1. In this note, a synthetic method different from that in literature is used to prepare com-
基金Project supported by the National Natural Science Foundation of China,(51674125,51604128)Outstanding Doctoral Dissertation Project Fund of JXUST(YB2016001)
文摘Molecular dynamics simulation was adopted to study the interaction between sulfosalicylic acid and aluminum,lanthanum and yttrium,and adsorption on kaolinite surfaces.A complexation reaction occurs between sulfosalicylic acid and aluminum,with an interaction energy of-10472.05 kJ/mol.O—Al covalent bonds are formed with a peak value of 7.93,while there is only weak adsorption between sulfosalicylic acid and rare earth ions.A hydrogen bonding reaction with 13605.82 kJ/mol energy occurs between sulfosalicylic acid and the surface of kaolinite(100).Thus,sulfosalicylic acid can form a complex with free aluminum ions,and can also be adsorbed on kaolinite by hydrogen bonding with aluminum in kaolinite(100)surfaces.Leaching of ion-adsorbed type rare earth ore was performed with aluminum inhibited,results show that when sulfosalicylic acid dosage increases from 0 to 0.15 wt%,aluminum ion concentration in the leaching solution decreases from 273.23 to 47.19 mg/L.And the effect of leaching pH value on the effect of sulfosalicylic acid on aluminum inhibition was studied,the result shows that,when the leaching pH value is 4.0—5.0,the rare earth leaching rate and the aluminum ion concentration basically remain unchanged.The molecular dynamics simulation results were verified by detection and analysis of XPS and SEM.
文摘The complex Tb(SSA)·H 2O (1) and Tb 2.5 La (SSA) 3.5 ·7H 2O (2), TbY(SSA) 2·2H 2O (3), Tb 1.5 Gd(SSA) 2.5 ·4H 2O (4), TbGd 1.5 (SSA) 2.5 ·3H 2O (5), TbGd 2.5 (SSA) 3.5 ·4H 2O (6), TbGd 3(SSA) 4·5H 2O (7), Tb 10.5 Cu 3(SSA) 12.5 ·30H 2O (8), (NH 4) 1.5 TbLa(SSA) 2.5 ·4H 2O (9), and (NH 4)Tb 2Cu(SSA) 3·6H 2O 10 (H 3SSA= sulfosalicylic acid ), were obtained by reacting ammonium sulfosalicylate with terbium chloride; or with the mixed solution of TbCl 3 and RECl 3 (or CuCl 2) (RE=La, Gd or Y). The compositions of these complexes and the fact that complexes 2～10 can be heteronuclear complexes or sosoloid from complexes and not usual mixture was confirmed by element analysis, IR, TGA and fluorescence analysis. Their luminescent properties were studied in a dimethyl sulfoxide(DMSO) solution (concentration: 1×10 -3 and 1×10 -4 mol·dm -3 ), and some infrequent results were obtained as follows: include, discovery of a synergistic effect between Tb 3+ and Cu 2+ in the 8; observation of the fluorescence quenching effect of NH 4 + in the 9 and 10; the fact that the fluorescence of the mixture of Tb(SSA) and Gd(SSA) (molar ratio 1∶1.5) is more intense than that of complex 1; and the influence of the DMSO on fluorescence enhances effect for the solutions of complexes in DMSO.
文摘The reaction of 5 sulfosalicylic acid (H 3 SSA) with o phenanthroline (Phen), NaOH, and MCl 2 (M=Zn, Cu) affords Zn(H SSA)(Phen)(H 2O) 2 (1) and Cu(H SSA)(Phen)(H 2O) 2 (2), respectively. Compounds 1 and 2 are characterized by elemental analysis, IR, fluorescence spectra and single crystal X ray diffraction analysis. The X ray diffraction analyses reveal that compounds 1 and 2 are isostructure. The 5 sulfosalicylic acid ligand loses two protons at the sulfo group and carboxylic group during the reaction. The Zn(II) and Cu(II) ions are six coordinated and adopt distorted octahedral geometry, which are surrounded by two N atoms from Phen, two O atoms from two water molecules, one O atom from —SO 3 group and one oxygen from carboxylic group of the other H SSA. Compounds 1 and 2 have unprecedented one dimensional linear chain formed by a repeating mononuclear structural unit, which is bridged by H SSA. The fluorescence intensity of 1 and 2 is stronger than that of Phen and H 3 SSA at 400 nm. The lowest excited single states of these complexes are assigned as mainly Phen localized 1(π,π *). The antibacterial activity test shows that compounds 1 and 2 strongly inhibit the growth of Streptococcus haemolyticus, Straphylococcus aureus and Escherichia coli .
