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通过分析太湖水的分子量分布变化以及亲疏组分,考察氯反应生成AOC的效果和机理.结果表明,弱疏组分的AOC生成量最大,其次为强疏,中亲和带负电亲水的生成量最少.氯主要与小分子的疏水性有机物反应,AOC的生成量最多.通过考察深度处理工艺的有机物分子量以及组分的变化,发现疏水性有机物呈逐渐下降而亲水性组分呈上升的趋势,表明氯化产生的AOC呈减少趋势.小分子的疏水性有机物是主要的氯化AOC的前体物.
The effect and mechanism of AOC formation by chlorine reaction were investigated by analyzing the changes of molecular weight distribution and the relatives and densities of water in Taihu Lake.The results showed that the AOC generation of the weak sparse component was the largest, followed by that of the strong sparse, middle and negatively charged hydrophilic species Chlorine mainly reacts with small hydrophobic organic compounds, and AOC is the most produced.With the investigation of the molecular weight of organic matter and the change of its composition, it is found that the hydrophobic organic compounds are gradually decreased and the hydrophilic components are increased The trend indicates a decreasing trend of AOC produced by chlorination. Small molecule hydrophobic organic species are the predominant precursors of chlorinated AOC.