Conversion of extracted titanium tailing and waste glass to value-added porous glass ceramic with improved performances. (1st May 2020)

• Record Type: Journal Article
• Authors: Xi, Cuiping; Zhou, Jianmin; Zheng, Feng; Gao, Jian-ming; Hu, Pengfei; Li, Yang; Zhen, Qiang; Bashir, Sajid; Liu, Jingbo Louise
• Is Part Of: Journal of environmental management. Volume 261(2020)
• Publication Date: 2020-05-01
• Subjects: Porous glass ceramic -- Extracted titanium tailing -- Waste glass -- Compressive strength -- Heat conductivity; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2020.110197
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: One of the major advances of this research is to produce porous glass ceramics (PGCs) via a feasible and cost-effective powder forming chemistry to convert solid wastes, extracted titanium tailing (ETT) and waste glass (WG) into the value-added PGCs. The maximum handling amount of ETT (30%) is determined from systematic experiments, based on the end use of these PGCs, which are manifested as controlled-crystalline porous structures of hybrid matrices. These multiscale porous networks are composed of a tunable pore size, high surface area and accessibility. The synthetic PGCs are found to display enhanced physical properties, as a result, the stewardship of their intrinsic chemical behaviors can be secured. To elucidate, the PGC shows an apparent density of 0.60 ± 0.01 g cm −3, a porosity of 76.0 ± 0.4%, a high compressive strength of 3.8 ± 0.2 MPa, an available water adsorption ratio of 4.4 ± 0.1%, a heat conductivity of 0.103 ± 0.003 W m −1 °C −1 and an applicable coefficient of thermal expansion ((5.43 ± 0.05) × 10 −6 m m −1 °C −1 ). This study indicates that indeed the powder forming chemistry provide a simple method to advance the conversion of industry and municipal solid waste (ETT & WG) into value-added PGCs with improved physical and chemical properties. Graphical abstract: Image 1 Highlights: Porous glass ceramic is synthesized using extracted titanium tailing as the material. The ceramic phase in the porous glass ceramic has been being confirmed by TEM. The porous glass ceramic (PGC) shows a low apparent density and a high porosity. The PGC has a high compressive strength and an available water adsorption rate. The PGC exhibits a low heat conductivity and an applicable thermal expansivity.