Bentonit Alam Tapanuli diinterkalasi surfaktan kationik benziltrimetilammonium klorida (BTMA-Cl) sebagai adsorben p-klorofenol dan fenol = Raw Bentonite Tapanuli intercalated by cationic surfactants benzyltrimethylammonium chloride (BTMA-Cl) as adsorbent p chlorofenol and fenol (Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2013)