A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Encapsulation of lead from hazardous CRT glass wastes using biopolymer cross-linked concrete systems
Discarded computer monitors and television sets are identified as hazardous materials due to the high content of lead in their CRTs (cathode ray tubes). Over 98% of lead is found in CRT glass. More than 75% of obsolete electronics including TV and CRT monitors are in storage because appropriate e-waste management and remediation technologies are insufficient. Already an e-waste tsunami is starting to roll across the US and the whole world. Thus, a new technology was developed as an alternative to current disposal methods; this method uses a concrete composite crosslinked with minute amounts of biopolymers and a crosslinking agent. Commercially available microbial biopolymers of xanthan gum and guar gum were used to encapsulate CRT wastes, reducing Pb leachability as measured by standard USEPA methods. In this investigation, the synergistic effect of the crosslinking reaction was observed through blending two different biopolymers or adding a crosslinking agent in biopolymer solution. This CRT-CBC (biopolymer- concrete) composite showed higher compressive strength than the standard concrete and a considerable decrease in lead leachability.
Encapsulation of lead from hazardous CRT glass wastes using biopolymer cross-linked concrete systems
Discarded computer monitors and television sets are identified as hazardous materials due to the high content of lead in their CRTs (cathode ray tubes). Over 98% of lead is found in CRT glass. More than 75% of obsolete electronics including TV and CRT monitors are in storage because appropriate e-waste management and remediation technologies are insufficient. Already an e-waste tsunami is starting to roll across the US and the whole world. Thus, a new technology was developed as an alternative to current disposal methods; this method uses a concrete composite crosslinked with minute amounts of biopolymers and a crosslinking agent. Commercially available microbial biopolymers of xanthan gum and guar gum were used to encapsulate CRT wastes, reducing Pb leachability as measured by standard USEPA methods. In this investigation, the synergistic effect of the crosslinking reaction was observed through blending two different biopolymers or adding a crosslinking agent in biopolymer solution. This CRT-CBC (biopolymer- concrete) composite showed higher compressive strength than the standard concrete and a considerable decrease in lead leachability.
Encapsulation of lead from hazardous CRT glass wastes using biopolymer cross-linked concrete systems
Kim, Daeik (author) / Quinlan, Michael (author) / Yen, Teh Fu (author)
Waste Management ; 29 ; 321-328
2009
8 Seiten, 4 Bilder, 5 Tabellen, 20 Quellen
Article (Journal)
English
Feasibility study on cross-linked biopolymeric concrete encapsulating selenium glass wastes
| Taylor & Francis Verlag | 2012
Glass matrix/pyrochlore phase composites for nuclear wastes encapsulation
| British Library Online Contents | 2003
| European Patent Office | 2020
Hazardous Wastes Treatment Technologies
| Wiley | 2018