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研究了金属离子对聚硅酸絮凝效果的影响。试验结果表明,少量金属离子的加人,将使絮体体积明显增大,低温絮凝效果也得到改善。而且Fe3+还能使聚硅酸的稳定性大大提高。 相似文献
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金属离子对聚硅酸絮凝效果的影响 总被引:16,自引:4,他引:16
研究了金属离子对聚硅酸絮凝效果的影响,试验结果表明,不昨金属离子的加入,将使絮体体积明显增大,低温絮凝效果也得到改善,而且Fe^2+还能使聚硅酸的稳定性大大提高。 相似文献
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比色法连续测定磷矿石中铁,铝的含量 总被引:2,自引:0,他引:2
介绍用比色法连续测定磷矿石中铁、铝含量。试样经浓硫酸分解后,在一定酸度条件下,试液中的Fe3+ 和Al3+ 与7 碘 8 羟基喹啉 5 磺酸反应,生成金属—有机配位体络合物。分别在365 nm 和590 nm 的波长下进行比色,测定磷矿中铁、铝的含量。本方法有较高的准确度,具有简便、快速、连续测定的优点。 相似文献
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应用荧光光谱、红外振动光谱和差热分析等研究了Eu^3+离子在不同氧化物玻璃基质中的发光行为。结果表明:不同氧化物玻璃基质对Eu^3+离子的激发谱和发光谱的峰化影响很小,发光强度按硅酸盐、硼酸盐、钡磷酸盐、铝磷酸盐玻璃顺序递增。玻璃中Eu^3+激活离子与最邻近配位体之间共价键因素引起的近距离作用对无辐射跃迁过程影响比多声子驰豫更强烈,讨论了氧化物玻璃配位体对Eu^3+离子的极化作用与发光强度的关系。 相似文献
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糖蜜酒精废液的中和-絮凝处理研究 总被引:7,自引:0,他引:7
采用石灰乳中和糖蜜酒精废液,对中和后的废液的絮凝处理进行了研究。结果表明,在所考察的有机高分子絮凝剂中,相对分子质量为600—900万的阴离子型聚丙烯酰胺(PHP—2)的絮凝沉降效果最好,较适宜的操作参数:pH=8.00,投药量=0.9mg/L废水,搅拌速度=200r/min,搅拌时间为6min。在该操作条件下将PHP—2与PAC(聚合氯化铝)进行复配,结果显示复配后的矾花颗粒增大,沉降速度明显加快,当PAC投加量为30mg/L废水时,5—7min能将悬浮物基本沉降完全。 相似文献
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Zhiqiao He Lili Lin Shuang Song Min Xia Lejin Xu Haiping Ying Jianmeng Chen 《Separation and Purification Technology》2008,62(2):376-381
Mineralization of an anthraquinone dye, C.I. Reactive Blue 19 (RB19), by single ozonation, single sonolysis, and ozonation combined with sonolysis (O3/US) was carried out in a laboratory-scale experiment. O3/US treatment rendered a more effective result than the other two methods. The effect of several operational parameters, including initial dye concentration, pH, ozone dose, and ultrasonic energy density, on the reduction of total organic carbon (TOC) was also investigated. The concentrations of related anions (maleic acid, oxalic acid, acetic acid, formic acid, nitrite ion, nitrate ion and sulfate ion) and the ammonium ion during mineralization were detected by ion chromatography (IC) and the ammonia–Nessler's reagent colormetric method, respectively. Other carbon based intermediates (3,6-dinitrosocyclohexa-1,4-diene, aniline, phenol, benzo-1,4-quinoe, phthalic acid, butene diacid, oxalic acid, and acetic acid) were detected by gas chromatography/mass spectrometry (GC/MS). Based on the results of these analyses, we propose a possible degradation pathway of RB19 during the O3/US process. 相似文献
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Toshihiko Maekawa Hiroyuki Nishide Eishun Tsuchida Hideki Ohmichi Jiro Okamoto 《应用聚合物科学杂志》1984,29(12):3795-3801
Acrylic acid was graft-polymerized onto polyethylene powder by preirradiation method. The grafted powder (PE-g-AA) rapidaly adsorbed Sm3? ion in high efficiency. The poly(acrylic acid) grafted to the surface region of PE acted as an effective chelating site for the relatively large Sm ion. The complex formation constant of Sm ion with PE-g-AA was much larger than those of Sm ion with poly(acrylic acid) and propionic acid and of Cu2+ ion with PE-g-AA. 相似文献
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研究了大孔膦酸树脂对 Co2 +的吸附性能和吸附机理 ;在 p H=3的 HAc- Na Ac缓冲溶液中 ,膦酸树脂对 Co2 + 有一吸附最大值 ;树脂对 Co2 + 的静态饱和吸附容量为 0 .95mmol/g树脂 ;用 2 mol/L的盐酸溶液进行洗脱 ,洗脱效率较高 ;树脂的再生能力较强 ;用化学分析法及红外光谱测定了有关基本参数 ,探讨了磷酸树脂吸附 Co2 + 的机理。 相似文献
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评述了对甲苯磺酸,对甲苯磺酸铜,氨基磺酸,强酸性阳离子交换树脂,六水三氯化铁,固载三氯化铝,五水四氯化锡,硫酸铜,七水硫酸锌,氧化钐,一水硫酸氢钠,硫酸氢钾,固体超强酸,杂多酸和维生素C等催化剂催化合成草酸二丁酯的合成方法。认为固载对甲苯磺酸,对甲苯磺酸铜,氨基磺酸,强酸性阳离子交换树脂,活性碳固载四氯化锡,氧化钐,一水硫酸氢钠,硫酸氢钾,固体超强酸,杂多酸和维生素C是合成草酸二丁酯的良好催化剂。微波辐射是有机合成的良好方法。 相似文献
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The effect of UV radiation on the removal of formic, oxalic and maleic acids from water by metallic ion (Fe2+ or Cu2+)/H2O2 and metallic ion/O3 was studied and compared. The results showed that metallic ion/O3/UV has higher efficiency than metallic ion/H2O2/UV for oxalic acid removal. UV radiation significantly increases the efficiency of metallic ion/H2O2 for formic and maleic acids removal while its effect on the efficiency of metallic ion/O3 for formic acid removal is minor. However, at pH 2, O3 alone showed higher efficiency than metallic ion/H2O2/UV for formic acid removal. Contrary to the relative efficiency of metallic ions in the previous systems, Cu2+ exhibited higher rate than Fe2+ for the removal of the degradation products of maleic acid by O3. UV radiation exhibited a minor effect on the efficiency of Cu2+/O3, while it exhibited a large effect on the efficiency of Fe2+/O3 for the removal of the degradation products of maleic acid. 相似文献
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研究采用磷钼黄分光光度法测定过氧化氢中磷含量。在硝酸介质中,磷酸根离子可以和钒酸根离子以及钼酸根离子作用生成可溶性的黄色配合物(P2O5·V2O5·22MoO3·nH2O),在460nm波长处测量吸光度,结果表明磷含量在0.50~30μg/mL范围内时,磷含量与吸光度呈线性关系,线性回归方程是y=44.037x-0.0084,相关系数为0.9999,检出限为0.50μg/mL。 相似文献