Leaching and uptake of heavy metals from soils amended with sewage sludge under rainfed sugarcane in Mauritius

Code (CO)	MSI03P3920
Author (AU)	Toory, V. Bholah, M. A. Ng Kee Kwong, K. F.
Title - English (ET)	Leaching and uptake of heavy metals from soils amended with sewage sludge under rainfed sugarcane in Mauritius
Thesis-Parent title (TH)	Lalouette, J. A., Bachraz, D. Y., Bheenick, K. J.(eds), Proceedings Sixth Meeting of Agricultural Scientists, Boname Hall, MSIRI, Réduit, Mauritius, 8-9 May 2003. Réduit: Food and Agricultural Research Council. 340 p.
Document Type(DT)	book chapter
Date of publication (DP)	2004
Source (SO)	p. 233-238
Notes (NO)	Also published in Revue agric. sucr. Ile Maurice 83(2&3), 2004: 71-76
Language of text (LT)	En
Language of summaries (LS)	En
Abstract (AB)	Sewage sludge when added to arable land can substitute for mineral fertilizers and improve soil physical properties. However, the presence of heavy metals in sewage sludge and their accumulation in soils would raise concern about possible toxicity to the sugar cane and potential contamination of groundwater sources. Lysimeter studies at Réduit (annual rainfall less than 1500 mm) and at Belle Rive (annual rainfall greater than 3500 mm) initiated to investigate the leaching of heavy metals: cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), lead (Pb), nickel (Ni) and zinc (Zn); from soils receiving sewage sludge at the rate of 0, 20 and 60 t ha-1 provided evidence to show that the heavy metals would not be a hazard to the environment and would not affect the quality of the sugar cane. Thus data obtained during the 2000-2001 and 2001-2002 crop seasons showed that the concentrations of Cd, Cr, Cu, Hg, Ni, Pb and Zn in the leachates and in the cane at harvest were hardly influenced despite the application of 60 t ha-1 of sludge.
Descriptors - English (DE)	Sugarcane organic contaminants sewage sludge agricultural re-use environment Wastes organic pollutants groundwater pollution toxicity heavy metals Leaching plant nutrition
Descriptors - Geographic (DG)	Mauritius
Sort Key 1(K1)	Sugarcane: Soils and plant nutrition
Sort Key 2 (K2)	Fertilization: Sewage sludge
Date record entered (DA)	2003-05-09
Language of analysis (LA)	En
Affiliation (AF)	MSIRI
Location (LO)	LIB
Processing status (PS)	cat
MSIRI Staff (MS)	CHEM