茶皂素的提取及对底泥中重金属的去除效果

发布时间：2018-05-25 09:40

  本文选题：茶皂素 + 茶籽粕　； 参考：《环境科学与技术》2016年S2期

【摘要】：以水为溶剂,从茶籽粕中提取茶皂素,采用单因素实验考察了提取时固液比、温度、时间和pH对茶皂素提取率的影响,并进一步采用正交实验对提取条件进行了优化。同时,研究了茶皂素对底泥中重金属的去除作用。结果表明,最佳提取条件为固液比1∶10、提取温度50℃、提取时间2 h、pH 8,该条件下茶皂素提取率最高,达14.1%。当粗茶皂素溶液的质量分数为20%时,Cu、Pb、Mn、Cd和Cr的去除率达到最大值,分别为Cu 18.2%、Pb 60.5%、Mn 38.8%、Cd 72.6%、Cr 10.9%。在自然pH(6.7)条件下,茶皂素对Cd、Pb和Mn都有明显的去除作用,而对Cu和Cr的去除作用不明显。
[Abstract]:Tea saponin was extracted from tea seed meal with water as solvent. The effects of solid-liquid ratio, temperature, time and pH on the extraction rate of tea saponin were investigated by single factor experiment, and the extraction conditions were optimized by orthogonal experiment. At the same time, the removal effect of tea saponin on heavy metals in sediment was studied. The results showed that the optimum extraction conditions were as follows: ratio of solid to liquid 1: 10, extraction temperature 50 鈩，

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