Bursera fagaroides bark as a bioindicator for air particle pollution using magnetic properties
Por:
Castaneda-Miranda, Ana G., Chaparro, Marcos A. E., Bohnel, Harald N., Chaparro, Mauro A. E., Castaneda-Miranda, Rodrigo, Pacheco-Castro, Adolfo, Martinez-Fierro, Margarita L., Solis-Sanchez, Luis O., Ornelas-Vargas, Gerardo
Publicada:
1 jun 2021
Resumen:
Shrub barks can accumulate airborne particles and seem to be suitable
biological monitors for assessing air pollution. We studied the bark of
the species Bursera fagaroides as a biomonitor of air pollution in an
urban area of Mexico. Samples were collected in dry and rainy seasons
during 2011 and 2012, in 28 sites which are exposed to magnetic
pollutants emitted by different human activities (industrial
point-sources and vehicular emissions). Environmental magnetism studies
allow determining mineralogy, concentration and grain size of magnetic
particles accumulated in barks, providing information on the sources and
characteristics of their emitted particles. Magnetic properties of all
samples were determined by environmental magnetism method. The highest
values of magnetic concentration dependent parameters were observed in
industrial and vehicular traffic sites. The mean values of saturation of
isothermal remanent magnetization SIRM for dry seasons are two to
threefold (SIRM = 0.8-1.2 x 10(-3)Am(2)kg(-1)) the mean value for rainy
season (SIRM = 0.4 x 10(-3)Am(2)kg(-1)). The integrated magnetic
analysis indicates the presence of ferrimagnetic minerals, mostly
magnetite-like (remanent coercivity H-cr = 31.6-38.7 mT) particles of
small sizes (1 - < 0.1 mu m). Selected samples were observed by scanning
electron microscopy, revealing the presence of such iron-rich particles
hosted in species' lenticels. These results demonstrate the usefulness
of the species' cortex as a biomonitor of air pollution, with an
affordable and immediate application, and raise new questions about what
type of physiological mechanism is involved for trapping magnetic
particles.
Filiaciones:
Castaneda-Miranda, Ana G.:
UNAM, Ctr Geociencias, Blvd Juriquilla 3001, Juriquilla 76230, Queretaro, Mexico
Univ Autonoma Zacatecas, SEDEAM, Lab Nacl CONACYT, Programa Ingn & Tecnol Aplicada, Av Ramon Lopez Velarde, Zacateca 9800, Mexico
Chaparro, Marcos A. E.:
Consejo Nacl Invest Cient & Tecn, UNCPBA, Ctr Invest Fis & Ingn, Ctr Prov Buenos Aires,CIFICEN, Pinto 399, RA-7000 Tandil, Argentina
Bohnel, Harald N.:
UNAM, Ctr Geociencias, Blvd Juriquilla 3001, Juriquilla 76230, Queretaro, Mexico
Chaparro, Mauro A. E.:
UNMDP, CEMIM, Ctr Marplatense Invest Matemat, Mar Del Plata, Argentina
Castaneda-Miranda, Rodrigo:
Univ Autonoma Zacatecas, SEDEAM, Lab Nacl CONACYT, Programa Ingn & Tecnol Aplicada, Av Ramon Lopez Velarde, Zacateca 9800, Mexico
Pacheco-Castro, Adolfo:
UNAM, Ctr Geociencias, Blvd Juriquilla 3001, Juriquilla 76230, Queretaro, Mexico
Univ Autonoma Queretaro, Licenciatura Biol, Queretaro, Mexico
Martinez-Fierro, Margarita L.:
Univ Autonoma Zacatecas, SEDEAM, Lab Nacl CONACYT, Programa Ingn & Tecnol Aplicada, Av Ramon Lopez Velarde, Zacateca 9800, Mexico
Univ Autonoma Zacatecas, Unidad Acad Med Humana & Ciencias Salud, Mol Med Lab, Carretera Zacatecas Guadalajara Km 6, Zacatecas 98160, Zacatecas, Mexico
Solis-Sanchez, Luis O.:
Univ Autonoma Zacatecas, SEDEAM, Lab Nacl CONACYT, Programa Ingn & Tecnol Aplicada, Av Ramon Lopez Velarde, Zacateca 9800, Mexico
Ornelas-Vargas, Gerardo:
Univ Autonoma Zacatecas, SEDEAM, Lab Nacl CONACYT, Programa Ingn & Tecnol Aplicada, Av Ramon Lopez Velarde, Zacateca 9800, Mexico
|