Industrial effluents, particularly from dye industry, is one of the major causes of serious concern as it contaminates the environmental water resources and affect human health. Treatment of such contaminants is a challenging area of interest to researchers. In this context, here, we have explored degradation and mineralization of Direct Blue (DB71) dye in aqueous solution by means of ultrasound irradiation at a frequency of 25 kHz and its combination with a novel homogenous sonocatalyst is investigated. The following experiments have been conducted to achieve complete degradation of the dye molecule. In-situ generation of the radicals under ultrasonic irradiation is measured by EPR technique. The effects of various operational parameters such as the effects of pH, dye concentration, catalyst dosage, electrolytes, energy input and kinetics of oxidation processes on the degradation efficiency are studied. COD measurements are also carried out in order to evaluate the mineralization efficiency of DB71. The effect of electrolytes on dye degradation is studied with different inorganic electrolytes. The rate constant decreases with increasing dye concentration. The degradation increases with increasing catalyst concentration and decreases with increasing dye concentration. Sonocatalytic degradation of the dye molecules are observed by UV-visible absorption and TOC measurements. The by-products formation of the sonocalytically degraded dye samples are analyzed by ESI-MS+ analysis. The catalyst is also tested for its efficiency in the degradation of real dye house effluents.

中文翻译：

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新型均相催化剂辅助的声催化降解染料直接蓝71

工业废水，特别是染料工业废水，是严重受到关注的主要原因之一，因为它污染了环境水资源并影响人类健康。这些污染物的处理是研究人员感兴趣的挑战领域。在这种情况下，在这里，我们已经探索了通过频率为25 kHz的超声辐照在水溶液中直接蓝（DB71）染料的降解和矿化作用，并研究了其与新型均相声催化剂的组合。已进行以下实验以实现染料分子的完全降解。通过EPR技术测量在超声辐射下自由基的原位产生。各种操作参数的影响，例如pH，染料浓度，催化剂用量，电解质，研究了能量输入和氧化过程动力学对降解效率的影响。为了评估DB71的矿化效率，还进行了COD测量。用不同的无机电解质研究了电解质对染料降解的影响。速率常数随着染料浓度的增加而降低。降解随着催化剂浓度的增加而增加，而随着染料浓度的增加而减少。通过紫外可见吸收和TOC测量观察到染料分子的声催化降解。通过ESI-MS +分析来分析经超声催化降解的染料样品的副产物形成。还测试了催化剂在降解实际染房废水中的效率。为了评估DB71的矿化效率，还进行了COD测量。用不同的无机电解质研究了电解质对染料降解的影响。速率常数随着染料浓度的增加而降低。降解随着催化剂浓度的增加而增加，而随着染料浓度的增加而减少。通过紫外可见吸收和TOC测量观察到染料分子的声催化降解。通过ESI-MS +分析来分析经超声催化降解的染料样品的副产物形成。还测试了催化剂在降解实际染房废水中的效率。为了评估DB71的矿化效率，还进行了COD测量。用不同的无机电解质研究了电解质对染料降解的影响。速率常数随着染料浓度的增加而降低。降解随着催化剂浓度的增加而增加，而随着染料浓度的增加而减少。通过紫外可见吸收和TOC测量观察到染料分子的声催化降解。通过ESI-MS +分析来分析经超声催化降解的染料样品的副产物形成。还测试了催化剂在降解实际染房废水中的效率。速率常数随着染料浓度的增加而降低。降解随着催化剂浓度的增加而增加，而随着染料浓度的增加而减少。通过紫外可见吸收和TOC测量观察到染料分子的声催化降解。通过ESI-MS +分析来分析经超声催化降解的染料样品的副产物形成。还测试了催化剂在降解实际染房废水中的效率。速率常数随着染料浓度的增加而降低。降解随着催化剂浓度的增加而增加，而随着染料浓度的增加而减少。通过紫外可见吸收和TOC测量观察到染料分子的声催化降解。通过ESI-MS +分析来分析经超声催化降解的染料样品的副产物形成。还测试了催化剂在降解实际染房废水中的效率。