辣木籽去除水中余氯研究

研究辣木籽(Moringaseed)去除水中余氯效果,为水净化处理实际应用提供科技支撑。用超纯水溶解含氯消毒片(有效氯含量为800～900 mg/片)制备含氯水,总余氯起始浓度分别为1、2、4 mg/L,其中游离余氯为0.94、1.94、3.91mg/L,化合余氯为0.06、0.06、0.09mg/L。每一总余氯浓度设3试验组和1对照组。其中试验组分别加入0.16、0.80、4.00g/L的辣木籽水提液50mL,对照组加入纯水50mL。计算反应时间0.5、2、4、24h各水样中游离余氯、总余氯和化合余氯的浓度。结果表明:辣木籽水提液对游离余氯去除效果明显,0.80g/L辣木籽水提液对总余氯浓度4mg/L的水有良好的净化效果,且游离余氯去除率达90%;在处理过程中,化合余氯浓度先升高后降低,升高程度与余氯浓度呈正相关性;4.00g/L水提液对较低余氯浓度水体的化合余氯去除率达99%,但处理余氯浓度高的水体时会使化合余氯含量升高。需要进一步研究的问题是在去除过程中化合余氯浓度在一段时间内增高、辣木籽净水活性成分的提取工艺和与其他净水方法协同处理废水技术等。

Study on Moringa oleifera Seed Removal of Residual Chlorine from Water

The removal efficiency of residual chlorine from water by Moringa oleifera seeds was investigated to provide technological support for practical applications. Chlorine-containing water was prepared by dissolving chlorine disinfection tablets (effective chlorine content, 800-900 mg/tablet) in ultra-pure water to give initial residual chlorine concentrations of 1, 2 and 4 mg/L, with free chlorine of 0.94, 1.94 and 3.91 mg/L and combined chlorine of 0.06, 0.06 and 0.09 mg/L. Each chlorine concentration was prepared in triplicate, along with a control. M. oleifera seed extract was prepared at three strengths, 0.16, 0.80 and 4.00g/L, and 50 mL of each strength was added to one the three replicates of each chlorine group, with 50 mL pure water was added to the control group. After reacting for 0.5, 2, 4 and 24 hours, the concentrations of free, total and combined residual chlorine were determined. Free residual chlorine was almost completely removed by M. oleifera seed extract and the removal rate in the residual chlorine concentration group of 4 mg/L was 90% with the 0.80 g/L extract. After adding the extract, the concentration of combined residual chlorine initially increased and then decreased and the increase was positively correlated with residual chlorine concentration. The removal extent of combined residual chlorine in the low residual chlorine concentration group (1 mg/L) was 99% by 4.00 g/L seed extract, while the concentration of combined residual chlorine increased for the higher residual chlorine concentration group. Future research should focus on solving the problem of initial increase in combined residual chlorine concentration, improving the extraction process of M. oleifera seeds and developing synergistic technologies for wastewater treatment and water purification.