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Nanoparticles in wastewater from a science-based industrial park—Coagulation using polyaluminum chloride
- Source :
-
Journal of Environmental Management . Dec2007, Vol. 85 Issue 4, p1009-1014. 6p. - Publication Year :
- 2007
-
Abstract
- Abstract: The Hsinchu Science-based Industrial Park (HSIP) is the hi-tech manufacturing hub of Taiwan. Wastewater from the HSIP contains numerous nano-sized silicate particles whose size distributions peak at 2 and 90nm. A 3–5mgl−1 as Al dose of polyaluminum chloride (PACl) was used in the field to coagulate these particles, but the removal efficiency was low. Laboratory scale tests indicated that although PACl coagulation removed 52% of the turbidity and 48% of the chemical oxygen demand (COD) from water, its effect on nano-particle removal was minimal. About 58% of the soluble COD was associated with colloidal Si particles. A light scattering test and transmission electron microscopy (TEM) demonstrated that the nano-particles agglomerated in approximately linear aggregates of sizes 100–300nm. Prolonged contact between residual PACl and the nano-particles generated large aggregates with sizes of up to 10μm and a fractal dimension of 2.24–2.63. The results presented herein should be of interest in the processing of “high-tech” wastewater that contains nanosized silica particles. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 03014797
- Volume :
- 85
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of Environmental Management
- Publication Type :
- Academic Journal
- Accession number :
- 27139879
- Full Text :
- https://doi.org/10.1016/j.jenvman.2006.11.013