Center for Environment and Energy Research and Studies (CEERS)
Abstract
The present study was undertaken to evaluate the growth response of
Vetiveria zizanioides amended with organic amendments to arsenic (As)
in contaminated soils and its ability to sequester As. The test results
indicate that the plants exhibited high tolerance to As in the soils
and their normal growth continued even though As concentration reached
500 mg/kg. However, when As concentrations in soils were in the range
of 1000~2000 mg/kg the plants could not survive no matter whether the
soils were amended. The accumulation of As in roots (185.4 mg/kg) was
higher than that in shoots (100.6 mg/kg). The As level in the
contaminated soil was reduced from 500 mg/kg to 214 mg/kg after six
months of As phytoextraction. Microbial population was not affected in
the As contaminated soil amended with dairy sludge, mycorrhizae and
Azotobacter