PAMAM dendrimer modified silica particles has great application value in water purification. 
Silica particles modified by pamam can effectively adsorb anionic dyes and surfactant in the water, in particular C18G1S showed the highest binding affinity to the anionic surfactant. The adsorption isothermal studies indicated that adsorption of surfactants on C18GnS was due to the assistance of hydrophobic interaction between the aliphatic peripherals on the dendron and the

alkyl tail on the surfactant. The anionic targets adsorbed on the surface modified silica particles can be released at alkaline condition because of the deprotonation of PAMAM dendron, which suggests the convenient recovery and reuse process. Counting in the cost efficiency and environmental low load, as-prepared amphiphilic dendron-modified silica is a promising solid phase adsorbent for water purification. Weihai CY Dendrimer Technology Co. Ltd forwards from “Solid-Phase Synthesis of Amphiphilic Dendron-Surface-Modified Silica Particles and Their Application Toward Water Purification”Chih-Chien Chu,† Norio Ueno,‡ and Toyoko Imae*,† Graduate School of Science and Technology, Keio UniVersity, Hiyoshi, Kohuku-ku, Yokohama 223-8522, Japan, and Material Science Research Center, Shiseido Co. Ltd., Hayabuchi, Tsuzuki-Ku, Yokohama 224-8558, Japan ReceiVed August 24, 2007. ReVised Manuscript ReceiVed December 7, 2007