2 research outputs found
The effect of silane treatment on nanosized carica papaya seed modified pullulan as biocoagulant in wastewater treatment
Currently, conventional wastewater treatment process used chemical coagulant such as Aluminium
sulphate. However, the residual aluminium in treated wastewater causes toxicity and serious health issues such as
Alzheimer’ disease. Thus, in this study the potential of nanosized Carica Papaya (CP) seeds treated by silane coupling
agent incorporated to pullulan on wastewater treatment was investigated. The biocoagulant produce prepared at a
different composition of CP range from 1% to 9% was used to treat sewage wastewater. The biocoagulant was
characterized by particle size analyser, FTIR and FESEM. The treated wastewater was analyzed by jar test in term of
turbidity, pH, dissolved oxygen and Total Suspended Solid with biocoagulant dosage at 0.6 g/L. The size of nanosized
biocoagulant was obtained at 608.9 nm. Silane treatment provides well dispersion of nanosized Carica Papaya seed
powder in the pullulan matrix phase. FTIR analysis shows the presence of O-H, C=O and Si-O-CH3 bond. The highest
turbidity reduction observed at the composition of nanosized CP5/P and silane treated nanosized CP5/P up to 93.89%
and 93.98% respectively. However, no significant changes observed on turbidity reduction with increasing CP seeds
content for both biocoagulant. Further, at these compositions, the TSS reduced up to 20% and 60% respectively. The
DO value of wastewater decreased from the initial value and the increased the pH from 6.58 to 6.69 lead to the neutral
condition. Therefore, the effectiveness of both untreated and silane treated biocoagulant were further confirmed upon
textile wastewater with turbidity reduction achieved up to 7.84% and 14.54 % respectively. Overall, silane treatment
enhanced the effectiveness of nanosized CP modified pullulan as biocoagulant
Comparative study on micronsized and nanosized carica papaya seed modified pullulan as biocoagulant in wastewater treatment
Plant-based coagulants have been used as an alternative material to replace chemical
coagulant in wastewater treatment. So far, limited information was found on the incorporation of
plant-based biocoagulant to natural polymers and the effect of particle size upon wastewater
treatment application. Thus, this study was conducted to explore the effectiveness of micronsized and
nanosized Carica Papaya (CP) seed modified pullulan as biocoagulant. Biocoagulant were prepared
at different composition of CP to pullulan, with the CP content range from 1% to 9%. The
biocoagulant were characterized via Particle Size Analyzer (PSA), Fourier Transform Infrared
Spectroscopy (FTIR) and morphological analysis via Field Emission Scanning Electron Microscopy
(FESEM). It was used to treat municipal wastewater. The treated wastewater quality was analyzed
by jar test method with dosage of biocoagulant used was 0.6g/L. Result showed that the 10% (D10),
50% (D50) and 90% (D90) distribution of micronsized CP had particle size of 0.3675 μm,
0.8433 μm and 1.9537 μm respectively. The nanosized CP was 0.4473nm (D10), 2.3758nm (D50)
and 2.9938nm (D90). Characterization of biocoagulant via FTIR revealed the appearance of O-H,
C=O, C-H and C-O-C bond which contribute to particle interaction for turbidity reduction of
wastewater. Jar test analysis found that at 3% micronsized CP and 7% nanosized CP were able to
reduce turbidity up to 59.65% and 65.27% respectively. Both size of biocoagulant slightly changed
the pH of treated wastewater to neutral, increased in dissolved oxygen (DO) and reduced in total
suspended solid (TSS). Overall, nanosized CP was found more effective as compared to micronsized
CP