次氯酸钠法处理难降解有机印染废水的研究

【作者】 王凌峰；

【导师】 岳钦艳； 谷惠民；

【作者基本信息】 山东大学 ， 环境工程， 2011， 硕士

【摘要】 高效、低成本处理难降解有机物的技术是目前环境治理研究的热点与难点。次氯酸钠法广泛用于处理环境中的污染物质,以其处理效果好、设备简单、投资经济等优点而受到人们的重视。本文采用次氯酸钠法处理三芳甲烷染料、偶氮染料以及葸醌染料,并分析处理效果与物质分子结构之间的关系。通过正交试验和单因素影响实验,确定各目标物质采用次氯酸钠法进行处理的合理运行条件,包括次氯酸钠投加量、反应时间、染料的初始浓度。以葸醌染料为例,通过单因素影响实验确定次氯酸钠法处理葸醌染料的最佳运行条件。弱酸艳兰RAW(浓度为40mg/L)：次氯酸钠投加量为0.3mL,反应时间为2.5h,在此条件下弱酸艳兰RAW的脱色率可达94.28%,COD去除率可达63.82%。弱酸艳绿GS(浓度为40mg/L)：次氯酸钠投加量为1.0mL,反应时间为3h,在此条件下弱酸艳绿GS的脱色率可达92.52%,COD去除率可达69.45%。对反应动力学的研究发现,次氯酸钠法处理目标物质的反应都近似呈现一级反应动力学特征。本研究选择适当的染料分子结构描述符,通过线性哪里有归分析法对几种目标三芳甲烷染料和偶氮染料进行了分子结构与次氯酸钠法对其去除效果之间的定量关系研究。研究发现目标三芳甲烷染料的去除率与磺酸基数目、I/O值、芳香环数目和乙烷基数目之间存在着较好的线性相关性,其中I/O值对目标三芳甲烷染料去除率的影响贡献最显著；目标偶氮染料的去除率与磺酸基数目、I/O值、芳香环数目和偶氮基数目之间存在着较好的线性相关性,其中I/O值对目标偶氮染料去除率的影响贡献最显著。更多还原

【Abstract】 High efficiency, low cost treatment for refractory organic technology is the hotspot and difficulty in the study of environmental management. Sodium hypochlorite method widely used in treatment of pollutants, with its good treatment effect, simple equipment, investment and other economic advantages and attention. In this paper, using sodium hypochlorite treatment of three aryl methane dyes, azo and anthraquinone dyes, and the analysis of treatment effect and the relationship between the molecular structure of the material.By orthogonal test and single factor experiment, determine the target substance using sodium hypochlorite method for processing the reasonable operation conditions, including sodium hypochlorite dosage, reaction time, the initial dye concentration. In order to anthraquinone dyes as an example, through the single factor experiment to determine the effect of sodium hypochlorite treatment of anthraquinone dyes and the best operating conditions. Weak acid brilliant blue RAW (concentration is 40mg/L):sodium hypochlorite dosage is 0.3mL, reaction time 2.5h, under the conditions of weak acid brilliant blue RAW removal rate was 94.28%, COD removal rate can reach to 63.82%. Weak acid brilliant green GS (concentration is 40mg/L):sodium hypochlorite dosage is 1.0mL, reaction time 3h, under the conditions of weak acid brilliant green GS removal rate was 92.52%, COD removal rate can reach to 69.45%.On the reaction kinetics study found, sodium hypochlorite treatment target material response are approximately shows a first-order kinetics characteristics.This study selects the appropriate dye molecular structure descriptor, by means of linear regression, several target three aryl methane dyes and azo dyes were investigated by molecular structure with sodium hypochlorite method in the study of the quantitative relationship between the removal effect. Study found that target three aryl methane dye removal rate and sulfonic acid number, I/O, aromatic ring number and ethylene alkyl number existed good linear correlation between the I/O value, to target three aryl methane dye removal rate influence the most significant contribution; target azo dye removal rate and sulfonic acid number, I/O, aromatic ring number and azo number existed good linear correlation between the I/O value, the target of azo dye removal is affected the most significant contribution.更多还原