Phytostabilization of a Pb-contaminated mine tailing by various tree species in pot and field trial experiments.
The potential of 6 tree species (Leucaena leucocephala, Acacia mangium, Peltophorum pterocarpum, Pterocarpus macrocarpus, Lagerstroemia floribunda, Eucalyptus camaldulensis) for phytoremediation of Pb in sand tailings (total Pb >9850 mg kg(-1)) from KEMCO Pb mine in Kanchanaburi province, Thailand, were investigated employing a pot experiment (3 months) and field trial experiment (12 months). In pot study E. camaldulensis treated with Osmocote fertilizer attained the highest total biomass (15.3 g plant(-1)) followed by P. pterocarpum (12.6 g plant(-1)) and A. mangium (10.8 g plant(-1)) both treated with cow manure. Cow manure application resulted in the highest root Pb accumulation (>10000 mg kg(-1)) in L. floribunda and P. macrocarpus. These two species also exhibited the highest Pb uptake (85-88 mg plant(-1)). Results from field trial also showed that Osmocote promoted the best growth performance in E. camaldulensis (biomass 385.7 g plant(-1), height 141.7 cm) followed by A. mangium (biomass 215.9 g plant(-1), height 102.7 cm), and they also exhibited the highest Pb uptake (600-800 microg plant(-1)). A. mangium with the addition of organic fertilizer was the best option for phytostabilization of Pb-contaminated mine tailing because it retained higher Pb concentration in the roots.
Department of Biology, Faculty of Science, Mahidol University, Bangkok, Thailand.
Weeradej
W
Meeinkuirt
Prayad
P
Pokethitiyook
Maleeya
M
Kruatrachue
Phanwimol
P
Tanhan
Rattanawat
R
Chaiyarat
D007220:Industrial Waste / Q000032:analysis*; D007854:Lead / Q000737:chemistry* / Q000633:toxicity*; D008906:Mining; D012822:Silicon Dioxide; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000737:chemistry / Q000633:toxicity; D013045:Species Specificity; D013997:Time Factors; D014197:Trees / Q000145:classification* / Q000378:metabolism*
D007220:Industrial Waste; D012987:Soil; D012989:Soil Pollutants; D007854:Lead; D012822:Silicon Dioxide