Modification of Spent Bleaching Earth with WO3 and the Application for Photocatalytic Degradation of Waste Dyestuff under Solar Light

Degradation of blue dye waste in Sarong Samarinda production using WO 3 -bleaching earth (BE) has been conducted. Structural and morphological characterization has conducted using X-ray diffraction (XRD), and Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDX). The X-ray diffraction results show the mineral on bleaching earth is rectorite dioctahedral mica layer and dioctahedral smectite with a ratio 2:1. The WO 3 pattern is appeared after the calcination. After calcination at 500°C, the WO 3 is deposited homogeneously on the BE surface. The catalytic performance of WO 3 -BE for photodegradation of the blue dye waste under the solar light is 99.85 % within 1 h.