The behavior and removal of silicon dioxide nanoparticles in synthetic aqueous systems
| dc.contributor.author | Noradila Binti Abdul Raof | |
| dc.date.accessioned | 2021-01-25T03:59:17Z | |
| dc.date.available | 2021-01-25T03:59:17Z | |
| dc.date.issued | 2019-06 | |
| dc.description.abstract | A study was conducted using both chemical (polyaluminium chloride (PACl) and polymer) and natural (pectin) coagulants for the removal of silicon dioxide nanoparticles in synthetic aqueous systems to stimulate the pollution concentrations found in semiconductor wastewater. The average of zeta potential and particle size as a function of pH 2 to 12 were carried out separately for the synthetic silicon dioxide and selected coagulants in determining the optimum pH. The optimum pH for silicon dioxide was at pH 4 with a zeta potential of -21 mV and average particle size of 258.2 d.nm. Furthermore, the optimum pH for polyaluminium chloride was at pH 7 with a zeta potential of +62.0 mV and average particle size of 182.4 d.nm. The optimum pH values for both polymer and pectin were at pH 5 with a zeta potential of -30.7 mV and -52.9 mV and average particle size at 760.5 d.nm and 1152 d.nm respectively. The interaction between the silicon dioxide and selected coagulants were carried out in order to determine the optimum coagulant dosage range by applying mixing speeds of 300 rpm (rapid) and 25 rpm (slow) with a settling time of 30 minutes. From the results, the optimum dosage of polyaluminium chloride, polymer, and pectin were at 15 mg/L, 11 mg/L and 3 mg/L respectively. The coagulation process between the interaction of silicon dioxide NPs and selected coagulants were further validated using the jar test method. The results of the jar tests showed that polyaluminium chloride, polymer, and pectin can remove 97.8%, 97.8%, 97.6% of silicon dioxide concentration in the aqueous system. The removal percentage of pectin recorded similar performance to the commercial coagulants. Therefore, it can be concluded that natural biopolymer coagulant such as pectin has properties to perform equally good as polyaluminium chloride and polymer in the removal of silicon dioxide nanoparticles in aqueous systems. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/11029 | |
| dc.language.iso | en | en_US |
| dc.title | The behavior and removal of silicon dioxide nanoparticles in synthetic aqueous systems | en_US |
| dc.type | Other | en_US |
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