Journal
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
Volume 14, Issue 9, Pages 894-907Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15226514.2011.636401
Keywords
metal contaminated soil; phytoremediation; phytoextraction; immobilization; chitosan; soil amendment
Categories
Funding
- Ministry of Higher Education Malaysia
- Universiti Pendidikan Sultan Idris Malaysia
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The effects of chitosan, a fishery waste-based material, and its derivative glutaraldehyde cross-linked chitosan (chitosan-GLA) on metal uptake by Lolium perenne (perennial ryegrass) and Brassica napus (rapeseed) were studied in a greenhouse pot experiment. Metal uptake by perennial ryegrass was highly dependent on the rate of addition of the chitosans. Low application rate (1% w/w) enhanced metal uptake, whereas 10% (w/w) addition decreased metal uptake. It was estimated that chitosan 1% (w/w) treatment could assist perennial ryegrass to remove approximately 3.2 kg Zn/ha and 0.29 kg Pb/ha. For rapeseed, metal uptake was decreased at all rates of application of chitosans. The ammonium acetate extractable metals in soil decreased following application of chitosans and plant growth.
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