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Kavakli, P. A.*; Kavakli, C.*; Seko, Noriaki; Tamada, Masao; G
ven, O.*
Nuclear Instruments and Methods in Physics Research B, 265(1), p.204 - 207, 2007/12
Times Cited Count：29 Percentile：86.52(Instruments & Instrumentation)A novel nonwoven fabric was prepared by radiation-induced graft polymerization of dimethylaminoethylmethacrylate (DMAEMA) onto polypropylene coated polyethylene nonwoven fabric. The trunk polymer was irradiated by electron beam at a voltage of 2 MeV and a current of 3 mA in a nitrogen atmosphere at dry-ice temperature at different doses. The degree of grafting was determined as a function of the total dose, monomer concentration, temperature, and reaction time. It was found that the degree of grafting of grafted polymer was greatly affected by reaction conditions. Grafting conditions were optimized, and about 150 % degree of grafting samples was used for further experiments. DMAEMA grafted polymer was later protonated by using acid solution to prepare adsorbent for the removal of anions. Adsorption experiments were performed in column mode for removal of hosphate. Approximately 2000 bed volumes of phosphate-free water can be produced from 10 ppb phosphate solution at high space velocity.
Kavakli, C.*; Kavakli, P. A.*; Seko, Noriaki; Tamada, Masao; Gven, O.*
no journal, ,
Glycidyl methacrylate (GMA) was grafted onto polypropylene coated polyethylene nonwoven fabrics in emulsion system by using radiation induced graft polymerization. For the preparation of GMA grafted fabric, the trunk PE/PP nonwoven fabric was irradiated by electron beam. After irradiation process, GMA was grafted onto irradiated nonwoven fabric under nitrogen atmosphere. In order to prepare fibrous PLE adsorbent for the removal of arsenic, grafted GMA was first modified with dipicolylamine. Maximum modification was obtained in 15 % (w/w) dipicolylamine solution. Then, PLE adsorbent was loaded with Cu
ions. High copper ion loading was observed for PLE fibers. Column mode adsorption studies were conducted with copper loaded PLE adsorbents at different arsenic concentrations (1-50 ppm) and pH to examine the removal of arsenic (V) in aqueous solutions. The breakthrough point of As (V) was found to be 8000 bed volumes for 1 ppm As (V) solution.
