Development of amino-functionalized silica nanoparticles for efficient and rapid removal of COD from pre-treated palm oil effluent - Syed Salman, Shafqat; Amir Azam, Khan; Muhammad Nadeem, Zafar; Mohammed Haji, Alhaji; Khairuddin, Sanaullah; Syed Rizwan, Shafqat; Shahzad, Murtaza; Suh, Cem Pang (Elsevier Editora Ltda., 2019)