The effectiveness of a magnetic ion exchange resin(MIEX) for the treatment of Hongze Lake water in China was evaluated.The kinetics of natural organic matter(NOM) removal at various MIEX doses and contact time,multipl...The effectiveness of a magnetic ion exchange resin(MIEX) for the treatment of Hongze Lake water in China was evaluated.The kinetics of natural organic matter(NOM) removal at various MIEX doses and contact time,multiple-loading experiments,impacts of MIEX prior to coagulation on coagulant demands and the effectiveness of combination of MIEX,pre-chlorination and coagulation were investigated.Kinetic experimental results show that more than 80%UV254 and 67%dissolved organic carbon(DOC) from raw water can be removed by the use of MIEX alone.94%sulfate,69%nitrate and 98%bromide removals are obtained after the first use of MIEX in multiple-loading experiments.It is suggested that MIEX can be loaded up to 1 250 bed volume(BV,volume ratio of tested water to resin) or more without saturation when regarding organics removal as a target. MIEX can remove organics to a greater extend than coagulation and lower the coagulant demand when combining with coagulation. Chlorination experimental results show that MIEX can remove 57%chlorine demand and 77%trihalomethane formation potential(THMFP) for raw water.Pre-chlorination followed by MIEX and coagulation can give additional organic and THMFP removals.The results suggest that MIEX provides a new method to solve the problem algae reproduction.展开更多
对水培花卉中易产生绿藻问题的研究结果表明,1%C uSO 4抑藻效果最好,其次是0.1%C uSO 4、0.5%C uSO 4、活性炭2 g;活性炭3个处理的新根生长情况明显优于磁铁3个处理,而C uSO 4 3个处理几乎无水培根产生,叶片甚至出现枯死现象;C uSO 4 3...对水培花卉中易产生绿藻问题的研究结果表明,1%C uSO 4抑藻效果最好,其次是0.1%C uSO 4、0.5%C uSO 4、活性炭2 g;活性炭3个处理的新根生长情况明显优于磁铁3个处理,而C uSO 4 3个处理几乎无水培根产生,叶片甚至出现枯死现象;C uSO 4 3个处理营养液pH相对稳定,活性炭3个处理、磁铁3个处理pH值随时间经历了一个升高—降低—升高的过程。展开更多
基金Project(2008ZX07421-002) supported by the Key National Science and Technology Project of ChinaProject(50638020) supported by the National Natural Science Foundation of China
文摘The effectiveness of a magnetic ion exchange resin(MIEX) for the treatment of Hongze Lake water in China was evaluated.The kinetics of natural organic matter(NOM) removal at various MIEX doses and contact time,multiple-loading experiments,impacts of MIEX prior to coagulation on coagulant demands and the effectiveness of combination of MIEX,pre-chlorination and coagulation were investigated.Kinetic experimental results show that more than 80%UV254 and 67%dissolved organic carbon(DOC) from raw water can be removed by the use of MIEX alone.94%sulfate,69%nitrate and 98%bromide removals are obtained after the first use of MIEX in multiple-loading experiments.It is suggested that MIEX can be loaded up to 1 250 bed volume(BV,volume ratio of tested water to resin) or more without saturation when regarding organics removal as a target. MIEX can remove organics to a greater extend than coagulation and lower the coagulant demand when combining with coagulation. Chlorination experimental results show that MIEX can remove 57%chlorine demand and 77%trihalomethane formation potential(THMFP) for raw water.Pre-chlorination followed by MIEX and coagulation can give additional organic and THMFP removals.The results suggest that MIEX provides a new method to solve the problem algae reproduction.
文摘对水培花卉中易产生绿藻问题的研究结果表明,1%C uSO 4抑藻效果最好,其次是0.1%C uSO 4、0.5%C uSO 4、活性炭2 g;活性炭3个处理的新根生长情况明显优于磁铁3个处理,而C uSO 4 3个处理几乎无水培根产生,叶片甚至出现枯死现象;C uSO 4 3个处理营养液pH相对稳定,活性炭3个处理、磁铁3个处理pH值随时间经历了一个升高—降低—升高的过程。