Su , Claire Xin-Hui
(2016)
Reactive Cibacron Blue Dye Wastewater Treatment Using Combined Technology Of Thermolysis And Inorganic-Organic Hybrid Polymer Coagulation-Flocculation.
Masters thesis, Universiti Sains Malaysia.
Abstract
Air sisa pewarna reaktif, cibacron biru F3GA (RCB), dirawat menggunakan teknologi gabungan hibrid termolisis dan pengentalan-pemberbukuan menggunakan polimer hibrid magnesium klorida-poliethylene oksida (MgCl2-PEO). Apabila air sisa pewarna sintetik dirawat menggunakan termolisis-pemangkin sahaja, 63.78% pemecatan warna dan 56.33% penurunan COD telah dicapai. Pemangkin yang digunakan ialah kuprum sulfat (CuSO4). Kecekapan maksimum bagi proses termolisis dicapai pada pH 2, dos pemangkin 5000 mg/L, suhu pemanasan 95°C dan tempoh pemanasan 120 minit. Polimer hibrid MgCl2-PEO disediakan dan dicirikan. Kemudian, ia diaplikasikan dalam pengolahan RCB menggunakan teknik pengentalan-pemberbukuan. Polimer hibrid disediakan dalam pelbagai nisbah MgCl2 kepada PEO melalui pengadunan fizikal. Kelikatan larutan akueus polimer hibrid menunjukkan tren menurun apabila komposisi MgCl2 meningkat. Walau bagaimanapun, kekonduksian larutan akueus hibrid polimer menunjukkan tren meningkat. Bagi aplikasi pengolahan air sisa RCB, didapati bahawa nisbah 90% MgCl2: 10% PEO menunjukkan prestasi tertinggi, dengan rekod 98.58% pemecatan warna dan 91.09% penurunan COD pada pH 11 dan dos pengental 1500 mg/L.
A reactive dye, cibacron blue F3GA (RCB), was subjected to a combined and hybrid technology of thermolysis and coagulation-flocculation using the magnesium chloride-polyethylene oxide (MgCl2-PEO) hybrid polymer. When the synthetic dye wastewater was subjected to catalytic thermolysis alone, maximum colour removal and COD reduction achieved were 63.78% and 56.33%, respectively. The catalyst used was copper sulphate (CuSO4). Maximum efficiency of thermolysis was found to be at pH 2, catalyst mass loading of 5000 mg/L, heating temperature of 95°C and heating time 120 minutes. The MgCl2-PEO hybrid polymer was prepared and characterised. It was then applied in the coagulation-flocculation of RCB. Various ratios of MgCl2 to PEO were prepared through physical blending. The viscosities of the hybrid polymer showed a descending trend as the composition of MgCl2 increased. However, the conductivities of the hybrid polymer aqueous solutions showed an ascending trend. For the application in RCB dye wastewater treatment, 90% MgCl2:10% PEO ratio showed the best performance, recording 98.58% colour removal and 91.09% COD reduction at pH 11 and coagulant dosage of 1500 mg/L.
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