[1] Diponegoro Univ, Chem Engn Dept, Fac Engn, Semarang, Indonesia
[2] Diponegoro Univ, Ctr Res & Serv, Membrane Res Ctr Mer C, Semarang, Indonesia
[3] Diponegoro Univ, Environm Engn Dept, Fac Engn, Jl Prof Soedharto, Tembalang 50275, Semarang, Indonesia