Heavy metals mobility in full-scale bioreactor landfill : Initial stage

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)769-777
Journal / PublicationChemosphere
Volume70
Issue number5
Publication statusPublished - Jan 2008
Externally publishedYes

Abstract

Selected heavy metals (HMs) including Cd, Cr, Cu, Ni, Pb and Zn initially released from a full-scale bioreactor landfill were monitored over the first 20 months of operation. At the initial landfill stage, the leachate exhibited high HMs release, high organic matter content (27 000-43 000 g l-1 of TOC) and low pH (5-6). By the fifth month of landfilling, the methanogenic stage had been established, and HMs release was reduced below the Chinese National Standards. Total released HMs accounted for less than 1% of landfill deposited during the investigated period. Most landfill HMs were inorganic. Fourier-transform infrared (FT-IR) spectra data and model calculations using Visual MINTEQ indicated that humic substances strongly affected the mobility of organic fractions of HMs in the methanogenic landfill. The initial rates of HMs release could be enhanced by recycling the leachate back to bioreactor landfill, but the total quantity released may be reduced by early establishment of methanogenic stage in bioreactor landfill. © 2007 Elsevier Ltd. All rights reserved.

Research Area(s)

  • Bioreactor landfill, Heavy metals, Humic substances, Solid-phase fractionation, Visual MINTEQ

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Heavy metals mobility in full-scale bioreactor landfill: Initial stage. / Qu, Xian; He, Pin-Jing; Shao, Li-Ming et al.
In: Chemosphere, Vol. 70, No. 5, 01.2008, p. 769-777.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review