Dalam kajian ini, penjerapan pewarna Brilian Hijau (BH) menggunakan tanah liat semulajadi diubah suai dengan memperkenalkan fotokatalis untuk penyingkirkan dan penyerosotan pewarna. Campuran titanium dioksida, bentonit dan polimer akrilik telah disediakan dengan kaedah salutan untuk berfungsi sebagai lapisan penjerap nipis. Formulasi bahan campuran ini telah dikaji selidik untuk mendapatkan nisbah yang optimum untuk proses penjerapan. Didapati nisbah yang terbaik ialah 0.2 g titanium dioksida, 0.3 g bentonit dan 1.5 g polimer akrilik yang mana 97% penyingkiran pewarna telah dicapai dalam masa 5 jam. Salutan penjerap dengan formulasi optimum ini dinilai dengan pencirian dan pencapaiannya. Pencirian salutan penjerap ini diuji dengan SEM, FTIR, DRS dan Zeta Berpotensi. Tambahan pula, pencapaian penjerap ini juga dikaji dengan menvariasikan kepekatan awal (50-200 mg/L) pewarna, kadar pH (3-11) dan suhu larutan (30 oC-70 oC). Data keseimbangan pewarna BH yang diperolehi sesuai dengan model Freundlich. Sementara itu, data kinetik terbaik diwakili oleh model pseudo second-order. Hasil kajian membongkarkan salutan penjerap ini berpotensi untuk teknologi rawatan air sisa masa depan.
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In this study, adsorption of Brilliant Green (BG) dye using natural clay as adsorbent was being modified by inserting photocatalyst for colour removal and degradation. A coating formulation of titanium oxide, bentonite and acrylic polymer was prepared using a coating method which will act as thin adsorbent layer. The adsorbent layer was investigated to obtain the optimum ratio for adsorption process. It was found that the best ratio was 0.2 g of titanium oxide, 0.3 g of bentonite and 1.5 g of acrylic polymer where 97% of dye removal had been achieved in 5 hours. This adsorbent coating with the optimum ratio was further characterized and the performance evaluation was performed. Characterization of the adsorbent evaluated by SEM, FTIR, DRS and Zeta Potential. Furthermore, performance of the adsorbent was tested by varying the initial concentration (50-200 mg/L) of dye, solution pH (3-11) and temperature (30 oC-70 oC). The obtained equilibrium data for BG dye was best fitted by Freundlich model. Meanwhile, the kinetics data was best represented by the pseudo second-order model. The result revealed that this adsorbent coating has the potential for future wastewater technology.
Photocatalyst assisted acrylic based adsorbent for cationic dye removal / Muammar Haqimi Mohd Jasin