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Black-dyed artefacts are found in museums worldwide, many produced using an iron-tannate compound. Deterioration of iron-tannate dyed artefacts is an international preservation issue: in New Zealand the deterioration of paru (iron-tannate) dyed Māori textiles is widespread. This article reports experimental work testing the efficacy of sodium alginate, a consolidant developed for deteriorated paru-dyed muka (fibre from harakeke; Phormium tenax). The colour stability, strength retention, and acidity of paru-dyed muka consolidated with sodium alginate (0.25, 0.5, and 1% w/v in water) was tested pre- and post-artificial light ageing. This study found that sodium alginate had no negative effect on paru-dyed muka and in some cases provided benefit. Interestingly, the colour of paru-dyed muka is substantially more stable in UV-filtered light than previously recognised. Also microfading results were in agreement with visual assessments of colour change at 1 Mlux hour exposure, providing confidence in this relatively new technique to assess colour change. 相似文献
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采用了BOD5/CODCr和静置烧瓶筛选实验两种较简单易行且数据重复性强的方法对6大类19种常用阳离子染料的生物降解性能进行测试,并对两方法的实验结果和原理进行了分析比较,为进一步研究染料的降解性能提供参考,结果表明大多数阳离子染料是容易被生物所降解的。 相似文献
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研究了以(PPQ)2Ir(acac)为客体,分别以PFO、PVK、PFB和PFG四种不同聚合物为主体掺杂体系的光谱性质.各种材料的紫外-可见吸收光谱和光致发光光谱的性质表明PVK和PFO与客体之间可以发生有效的能量转移.此外,与光致发光谱不同,发光器件电致发光光谱有较纯的红光发射,表明除了能量转移之外,电荷捕获也是实现器件红色发光的主要原因之一. 相似文献
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采用循环伏安法,对某品牌染发剂中对苯二胺的含量进行了测定。结果表明,对苯二胺在碳糊电极上产生良好的氧化还原峰,其氧化峰和还原峰峰电位分别为+0.32V和+0.24V;反应过程受吸附控制;将该方法用于测定市售染发剂中对苯二胺的含量取得较好的结果。 相似文献
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任百祥 《河北职业技术学院学报》2014,(2):55-58
采用纳米TiO2为催化剂,超声辐照为主要手段对实际印染工业废水进行了降解实验研究,考察了各种反应参数对印染废水降解效果的影响。结果表明,纳米TiO2对印染工业废水的超声降解效果具有明显的辅助和提高。当超声波频率为45kHz,功率为200W,溶液初始pH值为2.63,超声反应时间为150min的条件下,印染工业废水的COD去除率为73%,而同样条件下,投加750mg/L纳米TiO2,其超声降解废水COD去除率可达90.2%。 相似文献
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研究了甲基橙等有机染料在太阳光和Fenton试剂联合作用下的降解动力学。采用单因子法考察了硫酸亚铁用量、氧化剂双氧水用量和辐射光源等因素对降解效果的影响。结果表明:在优选实验条件下甲基橙的降解效果较好,有机染料的降解过程符合一级动力学。辐射光源对甲基橙的降解速率影响非常大,降解速率随紫外光强度的增强而加快。太阳光下甲基橙的降解速率常数是室内3~4倍,该反应体系在太阳光利用方面具有一定的应用价值。 相似文献
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用超声波和芬顿试剂联合处理模拟印染废水亚甲基蓝溶液,分析了反应时间、芬顿试剂配比用量、溶液pH值以及超声波处理时间等因素对处理效果的影响,最终确定了最佳实验条件:1mmol/L的亚甲基蓝溶液50mL,加入20mmol/L的FeS04溶液2.5mL,加入6%0的H202溶液22.5mL,调节pH一2.80,超声波处理1h,亚甲基蓝溶液的脱色率可达96%以上,COD的去除率达85%以上。实验结果表明,用超声波和芬顿试剂协同处理亚甲蓝溶液的效果优于芬顿试剂单独处理的效果。 相似文献
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叶凡 《赣南师范学院学报》2007,28(6):22-23
氟化高聚物具备了许多奇特的性质,用氟化高聚物作基材,在其中加入激光染料,把它作为激光器的激光工作物质,可以获得集固体激光器和染料激光器特点于一身的新型激光器:固体染料激光器. 相似文献
10.
Experimental Study on Decolorization and Degradation of Reactive Brilliant Red X—3B in a White Rot Fungal Biofilm Reacor 总被引:1,自引:0,他引:1
Experimental results of an azo dye(reactive brilliant red X-3B,RBR X-3B) decolorization and degradation in a white rot fungal biofilm reactor were introduced and discussed.The fungal biofilm reactor is highly potential for dye decolorization and degradation with the highest decoloring rate of 95% within 96 hours reaction time at initial pH 4.5 under high nirogen level (HN) (24mmol/L ammonium tartrate)condition.Experimental conditions.such as nutrient nitrogen levels in reaction mixture and initial pH,significantly affected dye decolorization and degradation.Effluents from this bioilm reactor can be well treated to meet the discharging requirements by use of chemical flocculation.RBR X-3B was first absorbed onto fungal biomass and then degraded gradually,The SH-13 fungus monopolized the biofilm throughout the experiments,though the reactor was exposed to open air for 4 months. 相似文献