8[38]Ramsden D K ,Hughes J & Weir S. Biotech Tech,1998,8:599
9[11]H S Kim, D JJoo, Y D Joung. The use of soluble organic polymers in waste treatment. Environmental Technology, 1999,16 (5): 489 ~494
10[18]A Ndabigengesere, KSNarasiah, BG Talbot. Active agents and mechanism of coagulation of turbid waters using Moringa oleifera.Wat. Res. , 2000, 29(2) :703 ~710