Properties evaluation and fabrication of green clay reformulated from water sludge
| Autor: | Chee-Heong Ooi, Akihiko Matsumoto, Yew Pei Ling, Fei-Yee Yeoh |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Process Chemistry and Technology Expansive clay Metallurgy Compaction Sodium silicate 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound Adsorption chemistry Specific surface area Bentonite Materials Chemistry Ceramics and Composites Kaolinite 0210 nano-technology Clay minerals 0105 earth and related environmental sciences |
| Zdroj: | Ceramics International. 44:1411-1419 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2017.09.214 |
| Popis: | Water sludge from Sungai Dua Penang fresh water processing plant has been successfully converted into functional pottery clay with improved physicochemical behavior and properties. Water sludge was generally made of kaolinite mineral that consisted of silica and alumina. At 7 h of milling duration, water sludge demonstrated a narrow particle size distribution at the size range of 107–150 µm. Water sludge owned a specific surface area of 27 m2/g with 8.8 nm (diameter) pore size and 0.05 cm3/g pore volume. Plasticity of clay body increased when clay formulation involved fine particles, e.g. water sludge or bentonite, which promote water adsorption ability. Fine particles with large surface area and better compaction also explained the enhanced hardness of pottery clay. The incorporation of clay minerals such as bentonite and sodium silicate into the formulation has facilitated metals immobilization within the clay body. Final clay product has a terra cotta color and performed a uniform shrinkage without obvious fracture. The fabrication of pottery wares from water sludge with minimized metals leakage has not only higher reutilize value but also a cost effective green method for handling waste and environmental issues. |
| Databáze: | OpenAIRE |
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