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StudyonthewaterqualityoftheTaihuLakeusinggenotoxicologicalmethodsWuQinglong,ChenKainingNanjingInstituteofGeographyandLimnol... 相似文献
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酸性红3B的杂多酸光催化降解动力学 总被引:10,自引:0,他引:10
以杂多酸Pw12O3-40为催化剂,研究了酸性红3B的光催化降解动力学.光强、催化剂浓度、酸性红3B初始浓度对光催化的速率均有正效应其中,光解速率与光强、酸性红3B初始浓度成正比;在催化剂浓度不大(吸光值<2)时,光解速率与催化剂投加量成正比体系中的溶解氧对催化剂起到氧化再生作用;驱氧条件下,由于催化剂再生受到抑制,光解速率减慢Pw12O3-40光催化降解酸性红3B的动力学符合Langmuir-Hinshelwood模型,溶液中催化剂和酸性红3B之间存在预络合作用,达到平衡后发生光氧化.与UV/TiO2法相比,uV/PW12O3-40法降解有机物的速率更快. 相似文献
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Gao Baoyu Chu Yongbao Yue Qinyan Kong Chunyan Wang Xiaona 《Frontiers of Environmental Science & Engineering in China》2007,1(3):368-373
In order to investigate the characteristics of pure Nano-Al13, Nano-Al13 was separated and purified from a series of poly-aluminum chloride (PAC) solutions which had the same Al13 percentage but different total Al concentrations, by using column chromatography, ethanol-acetone resolving and SO2−
4/Ba2+ displacement. The Al13 species yield was characterized by Al-ferron timed complexation spectrophotometry and 27Al-NMR (nuclear magnetic resonance). The coagulation efficiency of Nano-Al13, PAC and AlCl3 in synthetic water was also investigated by Jar tests. The dynamic process and aggregation state of kaolin suspensions coagulating
with Nano-Al13, PAC and AlCl3 were similarly investigated using a photometric dispersion analyzer 2000 (PDA2000). The experimental results indicated that
the ethanol-acetone resolving method was simple and could separate the PAC solution at different concentrations, while column
chromatography could separate PAC solutions at low concentrations. The SO4
2−/Ba2+ displacement method could separate PAC solutions at high concentrations. However, extra inorganic cation and anion could
be added in the solution during separation. The coagulation efficiency and dynamic experimental results showed that Nano-Al13 with high positive-charged species was effective in removing turbidity and color. The dynamic process results showed that
Nano-Al13 also had the best recovery capability after shearing compared with PAC and AlCl3 because the Nano-Al13 conformation is more effective in charge neutralization.
Translated from Acta Scientiae Circumstantiae, 2005, 25(6): 767–772 [译自: 环境科学学报] 相似文献
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In order to provide further references for studing on the causes of Kaschin-Beck discase (KBD) and measuring for its prevention and treatment from a macroscopic view, we analyzed the natural growth and declineof KBD and the effects of selenium and humic acid on its occurrence from an epidemiologic angle. In this article through a retrospective survey on the spots of disease areas by comparison between a change in water sources and that without. It was proved that a change in water sources was an effective measure for the prevention of KBD occurrence, and the pathogenic factor of KBD was one (or several kinds) of organic compounds or active radicals related to water. 相似文献
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