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Handoko, Okta Tri and Hasanudin, Udin and Suroso, Erdi and Dermiyati, - and Yuwono, Suripto D. and Ginting, Simparmin Br and Sugiharto, Ribut and Indraningtyas, Lathifa and Amelia, Julfi Restu and Iryani, Dewi Agustina Economic and environmental analysis of spent bleaching earth reactivation. IOP Conf. Series: Earth and Environmental Science.