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Title: Development of an accelerated leaching method for incineration bottom ash correlated to toxicity characteristic leaching protocol
Authors: Lin, Shengxuan
Zhou, Xuedong
Ge, Liya
Ng, Sum Huan
Zhou, Xiaodong
Chang, Victor Wei-Chung
Keywords: Accelerated leaching method
Heavy metal
Incineration bottom ash
Toxicity characteristic leaching protocol
Issue Date: 2016
Source: Lin, S., Zhou, X., Ge, L., Ng, S. H., Zhou, X., & Chang, V. W.-C. (2016). Development of an accelerated leaching method for incineration bottom ash correlated to toxicity characteristic leaching protocol. Electrophoresis, in press.
Series/Report no.: Electrophoresis
Abstract: Heavy metals and some metalloids are the most significant inorganic contaminants specified in toxicity characteristic leaching procedure (TCLP) in determining the safety of landfills or further utilization. As a consequence, a great deal of efforts had been made on the development of miniaturized analytical devices, such as Microchip Electrophoresis (ME) and μTAS for on-site testing of heavy metals and metalloids to prevent spreading of those pollutants or decrease the reutilization period of waste materials such as incineration bottom ash. However, the bottleneck lied in the long and tedious conventional TCLP that requires 18 h of leaching. Without accelerating the TCLP process, the on-site testing of the waste material leachates was impossible. In this study, therefore, a new accelerated leaching method (ALM) combining ultrasonic assisted leaching with tumbling was developed to reduce the total leaching time from 18 h to 30 min. After leaching, the concentrations of heavy metals and metalloids were determined with ICP-MS or ICP-optical emission spectroscopy. No statistical significance between ALM and TCLP was observed for most heavy metals (i.e., cobalt, manganese, mercury, molybdenum, nickel, silver, strontium, and tin) and metalloids (i.e., arsenic and selenium). For the heavy metals with statistical significance, correlation factors derived between ALM and TCLP were 0.56, 0.20, 0.037, and 0.019 for barium, cadmium, chromium, and lead, respectively. Combined with appropriate analytical techniques (e.g., ME), the ALM can be applied to rapidly prepare the incineration bottom ash samples as well as other environmental samples for on-site determination of heavy metals and metalloids.
ISSN: 0173-0835
DOI: 10.1002/elps.201600129
Schools: School of Civil and Environmental Engineering 
Organisations: A*STAR SIMTech
Research Centres: Nanyang Environment and Water Research Institute 
Rights: © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the author created version of a work that has been peer reviewed and accepted for publication by Electrophoresis, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles
NEWRI Journal Articles
SIMTech Journal Articles

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