Natural organic matter(NOM) removal from surface water by coagulation
  • 【DOI】

    10.3321/j.issn:1001-0742.2005.01.025

  • 【摘要】

    Poly-aluminum-chloride-sulfate(PACS) with different SO42-/Al3+ mole ratios and bacicity(γ) of 2.0 was synthesized using AlCl3· 6H2O, Al2 (SO4)3· 18H2O and Na2CO3 as raw materials. The effect of SO24-/... 展开>>Poly-aluminum-chloride-sulfate(PACS) with different SO42-/Al3+ mole ratios and bacicity(γ) of 2.0 was synthesized using AlCl3· 6H2O, Al2 (SO4)3· 18H2O and Na2CO3 as raw materials. The effect of SO24-/Al3+ ratio on the performance of PACS for removal of natural organic matter(NOM) with humic-rich actual water was examined. It was found that PACS with SO42-/Al3+ mole ratio of 0.0664achieved the best NOM removal results and was selected to investigate its performance in comparison with PAC, FeCl3 and alum (Al2(SO4)3 ·18H2 O). The experimental results showed that the optimum NOM removals were achieved at pH 5.0-8.2 and the dose of about5.0 mg/L as Al both for the selected PACS and PAC, at pH 5.0-6.0 and the dose of about 7.0 mg/L as Fe for FeCl3, and at pH 5.0-7.0 and the dose of about 7.0 mg/L as Al for alum, respectively. At the optimum conditions, the selected PACS achieved the best NOM removal result, followed by PAC, FeCl3, and then alum. The concentration of residual aluminum in treated water by the selected PACS and PAC under the optimum coagulant conditions was approximately 115 μg/L, which can completely comply with the regulated limits. 收起<<

  • 【作者】

  • 【作者单位】

    School of Environmental Science and Engineering

  • 【刊期】

    环境科学学报(英文版) ISTIC SCI 2005年1期

  • 【关键词】

    coagulation  humic-rich water  NOM removal  residual aluminum 

  • 【基金项目】

    The authors are very grateful to the funding of this study by the Deutscher Akademischer Austauschdients acknwledge the laboratory space and working facilities support from Englar-Bunte-Institute