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高小龙 《煤炭加工与综合利用》2018,(6)
介绍了高密度沉淀池的沉降原理、装置的组成和工艺流程;指出了高密池在运行中存在的7个常见问题,并提出了解决办法;总结了对高密池运行的10点心得体会。 相似文献
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Ceria spheres with different sizes and sulfurized products with corresponding morphology were prepared by hydrothermal and gas-solid reaction method at 600–800 °C under CS2 atmosphere for a short time, respectively. Dimensional effect in preparation of γ-Ce2S3 was firstly investigated by means of techniques such as scanning electron microscopy(SEM), X-ray diffraction(XRD), thermal gravimetric analysis(TGA) and spectrophotometer. The results showed that when ceria nanoparticles with small size were used as precursors, the γ-Ce2S3 could be prepared at the lower temperature and the badly sintered products were obtained; when ceria nanoparticles with large size were employed as precursors, pure γ-Ce2S3 was difficultly obtained even if the temperature was up to 800 °C and the products tended to keep their original size. The heat-resistance property of the γ-Ce2S3 with large size was better than the smaller one, and the pure γ-Ce2S3 prepared from precursor with small size had a good pigmentary performance. 相似文献
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为了实现染料废水得有效处理,以环己二胺、水杨醛和NiCl_2为原料合成了催化剂Ni_2L_2.H_2O(C_(40)H_(44)N_4Ni_2O_5)。采用单晶衍射、红外光谱、紫外光谱、核磁共振波谱、电导率、元素分析对其进行了表征。利用分光光度计考察了其活化H_2O_2氧化降解甲基橙的性能,利用高锰酸钾法测定了降解过程的COD值,利用高效液相色谱(HPLC)测定了降解产物,利用自由基捕获进行了机理探讨。发现Ni_2L_2.H_2O是由两分子单核Ni配合物(Ni L)与一分子H_2O组成,水中的氧原子不参与配位。发现当甲基橙浓度为30 mg/L,催化剂用量为4 mg/L,pH=9,T=40℃,双氧水用量为10 mmol/L时,250 min后甲基橙的脱色率为100%。发现降解产物有草酸、顺丁烯二酸和二氧化碳;发现降解过程中甲基橙降解液的COD下降;水杨酸捕捉羟基自由基生成2,5-二羟基苯甲酸。说明Ni_2L_2.H_2O可以活化H_2O_2产生羟基自由基,羟基自由基进攻甲基橙实现甲基橙染料的氧化开环降解,直至矿化。给出了可能的活化降解机制。 相似文献