TY - JOUR
T1 - Assessment of in situ and ex situ phytorestoration with grass mixtures in soils polluted with nickel, copper, and arsenic
AU - Zacarías Salinas, Montserrat
AU - Beltrán Villavicencio, Margarita
AU - Bustillos, Luis Gilberto Torres
AU - González Aragón, Abelardo
PY - 2012
Y1 - 2012
N2 - This work shows a study of in situ and ex situ phytoextraction as a polishing step in the treatment of an industrial urban soil polluted with nickel, arsenic and copper. The soil was previously washed, and phytoextraction was performed by application of a mixture of grass (Festuca rubra, Cynodon dactylon, Lolium multiforum, Pennisetum). The soil had initial heavy metals concentrations of 131. ppm for Ni, 717 for As and 2734 for Cu (mg of metal/kg of dry soil). After seeding and emerging of grass, vegetal and soil samples were taken monthly during 4. months. Biomass generation, and concentration of Ni, As and Cu in vegetal tissue and soil were determined for every sample. Plants biomass growth in ex situ process was inhibited by 37% when compared with blank soil. Grass showed remarkable phytoextraction capability in situ, it produced 38. g of biomass every 15. days (wet weight) during a period of 3. months, but then declined in the fourth month. Concentrations of metals in grass biomass were up to 83. mg Ni/kg, 649. mg As/kg and 305. mg Cu/kg dry weight. Metal reduction of 49% for Ni, and 35% for Cu and As was observed at rhizospheric soil.
AB - This work shows a study of in situ and ex situ phytoextraction as a polishing step in the treatment of an industrial urban soil polluted with nickel, arsenic and copper. The soil was previously washed, and phytoextraction was performed by application of a mixture of grass (Festuca rubra, Cynodon dactylon, Lolium multiforum, Pennisetum). The soil had initial heavy metals concentrations of 131. ppm for Ni, 717 for As and 2734 for Cu (mg of metal/kg of dry soil). After seeding and emerging of grass, vegetal and soil samples were taken monthly during 4. months. Biomass generation, and concentration of Ni, As and Cu in vegetal tissue and soil were determined for every sample. Plants biomass growth in ex situ process was inhibited by 37% when compared with blank soil. Grass showed remarkable phytoextraction capability in situ, it produced 38. g of biomass every 15. days (wet weight) during a period of 3. months, but then declined in the fourth month. Concentrations of metals in grass biomass were up to 83. mg Ni/kg, 649. mg As/kg and 305. mg Cu/kg dry weight. Metal reduction of 49% for Ni, and 35% for Cu and As was observed at rhizospheric soil.
KW - Grass
KW - Metals
KW - Phytoextraction
KW - Phytorestoration
KW - Soil
UR - http://www.scopus.com/inward/record.url?scp=84857685571&partnerID=8YFLogxK
U2 - 10.1016/j.pce.2010.11.006
DO - 10.1016/j.pce.2010.11.006
M3 - Artículo
SN - 1474-7065
VL - 37-39
SP - 52
EP - 57
JO - Physics and Chemistry of the Earth
JF - Physics and Chemistry of the Earth
ER -