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- Title
Accumulation of Cu, Cd, Cr, Mn and Pb from artificially contaminatedsoil by Bacopa monnieri
- Authors
Sinha, Sarita
- Abstract
The metal accumulation potential of Bacopa monnieri L. was assessed under simulated laboratory conditions. This study was carried out in mixed metals (Cu, Cd, Pb, Cr, Mn) condition and repeated exposures inartificial contaminated soil. The growing shoots were planted in garden subsoil containing 3, 16, 32, 64, 160 microM each of the above metals. After 8 weeks, plants were refeeded to three times higher concentrations of each metal than initially used to assess the maximum accumulating potential of the metals. The accumulation of the metals by the root and shoot was concentration and duration dependent. The metal accumulation was considerably higher in the fine root than in the shoot and showed the following order: Mn > Cr> Cu > Cd> Pb. The plantsshowed high tolerance to the metals as no visible phytotoxic symptomwas produced after 8 weeks. However, as a result of combined metal toxicity, chlorophyll content was reduced by 62% after 12 weeks. The highest metal concentration was lethal to the plant at 16 weeks. In view of their high tolerance, the plants of B. monnieri may be considered for the amelioration of industrially-polluted wetlands experiencing regular flushing of wastewaters.
- Subjects
INDIA; MANGANESE; WASTEWATER treatment; TOXICITY testing; SOIL pollution; LEAD; HEAVY metals; COPPER; CHROMIUM; CADMIUM; BIOACCUMULATION; STATISTICS
- Publication
Environmental Monitoring & Assessment, 1999, Vol 57, Issue 1, p253
- ISSN
0167-6369
- Publication type
Article
- DOI
10.1023/A:1006091215529