Variations in the chemical properties of landfill leachate

L. M. Chu*, K. C. Cheung, Ming Hung WONG

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

168 Citations (Scopus)


Landfill leachates were collected and their chemical properties analyzed once every two months over a ten-month period from the Gin Drinkers' Bay (GDB) and Junk Bay (JB) landfills. The contents of solids, and inorganic and organic components fluctuated considerably with time. In general, the chemical properties of the two leachates correlated negatively (P<0.05) with the amounts of rainfall prior to the sampling periods. However, magnesium and pH of the leachates remained relatively constant with respect to sampling time. The JB leachate contained higher average contents of solids and inorganic and organic matter than those of GDB with the exception of trace metals. Trace metals were present in the two leachates in trace quantities (<1.0 mg/liter). The concentrations of average ammoniacal nitrogen were 1040 and 549 mg/liter, while chemical oxygen demand (COD) values were 767 and 695 mg/liter for JB and GDB leachates, respectively. These results suggest that the leachates need further treatment before they can be discharged to the coastal waters.

Original languageEnglish
Pages (from-to)105-117
Number of pages13
JournalEnvironmental Management
Issue number1
Publication statusPublished - Jan 1994

Scopus Subject Areas

  • Global and Planetary Change
  • Ecology
  • Pollution

User-Defined Keywords

  • Ammoniacal nitrogen
  • Chemical properties
  • Hong Kong
  • Landfill leachate
  • Spatial variation
  • temporal variation


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