Metal content in mosses from the Metropolitan Area of the Toluca Valley: a comparative study between inductively coupled plasma optical emission spectrometry (ICP-OES) and total reflection X-ray fluorescence spectrometry (TXRF)

Caballero-Segura, Barbra; Ávila-Pérez, Pedro; Dı́az, Carlos; Ramírez-García, J. J.; Zarazua, G.; Soria, Ricardo Ortega; Ortiz-Oliveros, Huemantzin Balan

doi:10.1080/03067319.2014.940343

Cited by 18 publications

(5 citation statements)

References 27 publications

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“…Also it was observed that, in general, the sites located in TR contained the lowest concentrations compared with values obtained in UR, an exception of Co that presented high concentrations in Ciervita (PA). With some variation in the concentrations measured, this observation is consistent with similar results reported by Zarazúa-Ortega et al, 2013 [21], and Caballero-Segura et al, 2014 [22], who found the highest chemical concentrations in sampled mosses located in UR regions. The elemental chemical concentration variation in the samples could be largely attributed to the combustion processes from different socioeconomic activities and the number of vehicles in use locally.…”

Section: Journal Of Chemistrysupporting

confidence: 91%

Application of Neutron Activation Analysis for Determination of As, Cr, Hg, and Se in Mosses in the Metropolitan Area of the Valley of Toluca, Mexico

Mejía-Cuero¹,

García-Rosales²,

Longoria-Gándara³

et al. 2015

Journal of Chemistry

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This research presents a study of environmental monitoring at different sampling sites from the Metropolitan Area of the Valley of Toluca (MAVT), Mexico, using mosses (Leskea angustata(Tayl.) andFabronia ciliaris(Brid.)) and soil samples. The epiphytic mosses and soils were sampled in two campaigns within two periods of the year, a rainy and dry-cold season. The selected sampling sites included urban regions (UR), transitional regions (TR), and protected natural areas (PA). The samples were analyzed by the Instrumental Neutron Activation Analysis (INAA) to determine As, Cr, Hg, and Se principally. However, due to the versatility of the analytic technique used, other elements including Cs, Co, Sc, Sb, Rb, Ce, La, Eu, and Yb were also detected. Statistical analysis (As, Cr, Hg, and Se) was carried out with principal components and cluster analysis methods; this revealed that a good correlation exists between metal content in mosses and the degree of pollution in the areas sampled. The obtained results in mosses showed that the concentrations of As, Cr, Co, Cs, Rb, Ce, La, and Yb increased with respect to the concentrations obtained during the first sampling, whereas Se, Sc, Sb and Eu, concentrations were decreased. For As and Hg, the concentrations were similar in both sampling periods. The soil samples present the most significant concentration.

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Section: Journal Of Chemistrysupporting

confidence: 91%

Application of Neutron Activation Analysis for Determination of As, Cr, Hg, and Se in Mosses in the Metropolitan Area of the Valley of Toluca, Mexico

Mejía-Cuero¹,

García-Rosales²,

Longoria-Gándara³

et al. 2015

Journal of Chemistry

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“…Respecto a los sitios Alameda y Reforma, el tráfico vehicular se presenta sobre vialidades primarias; sin embargo, es importante mencionar que están rodeadas por edificios, lo cual puede contribuir a la existencia de una obstrucción a la dispersión de partículas de Pb, Cu y Zn asociados al MP, incluyendo las provenientes de industrias metalmecánicas y cromadoras ubicadas en la zona industrial de Toluca. Lo anterior concuerda con lo reportado por Zarazúa-Ortega et al (2013), Caballero-Segura et al (2014 y Macedo-Miranda et al (2016), quienes en estudios previos encontraron briofitas altamente enriquecidas por estos metales (FE ≥ 10) en dichos sitios, aplicando monitoreo pasivo.…”

Section: Resultados Y Discusiónunclassified

BIOMONITOREO ACTIVO CON Leskea angustata EN LA ZONA METROPOLITANA DEL VALLE DE TOLUCA

Lara-Almazán

Zarazúa-Ortega

García-Chávez

et al. 2021

RICA

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El objetivo de este trabajo fue evaluar los niveles de Cu, Zn y Pb en la zona metropolitana del valle de Toluca (ZMVT) empleando la técnica de biomonitoreo activo con bolsas con musgo (moss bags) con Leskea angustata como bioindicador, así como determinar si se producen fitoquelatinas (PC) y si hay correlación entre la concentración de éstas y de glutatión (GHS) con los metales presentes en el musgo. Se seleccionaron 10 sitios de monitoreo y en cada uno se colocaron dos bolsas con musgo para ser expuestas al ambiente de la ZMVT durante seis meses. Las concentraciones de metales se determinaron mediante la técnica de fluorescencia de rayos x en reflexión total (TXRF), mientras que el GHS y las PC se cuantificaron empleando la técnica de cromatografía de líquidos de ultra alta resolución acoplada a espectrometría de masas (UPLC-MS). Se evaluó la concentración de metales, PC y GHS antes y después de la exposición y se calculó la tasa de enriquecimiento. Los resultados muestran enriquecimientos de 2 a 30 para metales y de 116 a 569 para GHS. La concentración de PC siempre fue menor al límite de detección. El orden de la concentración total de metales en los sitios de monitoreo fue: Tollocan > Reforma > San Mateo Atenco > Alameda > Aeropuerto > San Cristóbal > Metepec > Ceboruco > Toluca Centro > Oxtotitlán. En general Tollocan, San Mateo Atenco, Alameda y Reforma fueros significativamente diferentes a los demás sitios. El GHS presentó un rango de concentración de 164 a 808 nM/g y presentó correlaciones positivas (r = 0.8) con el Cu, Zn y Pb, por lo que se infiere que la concentración de los metales en estudio tiene relación directa con su inducción. Con los resultados obtenidos en este trabajo se pude concluir que el GHS desempeña un papel fundamental en la bioacumulación de metales divalentes en Leskea angustata de la ZMVT e incrementa su potencial de acumulación, ya que es un mecanismo importante de destoxificación en estos organismos.

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“…The Tollocan site is a good example, where increases in heavy metals concentration were observed. This site is located close to industrial area and it presents high vehicular traffic (Wannaz et al 2006 ; Machado et al 2007 and 2008 ; Caballero et al 2014 ; Mejía-Cuero et al 2015 ). The emissions inventory shows that 2 % of PM 10 in the MATV corresponds to toxic heavy metals (Cr, Pb, Ni and Mn), which are produced by unsealed roads and soils without vegetation (SMA-GEM 2007b , 2012 ).…”

Section: Resultsmentioning

confidence: 99%

Accumulation of heavy metals in mosses: a biomonitoring study

Macedo-Miranda

Ávila-Pérez²,

Gil-Vargas

et al. 2016

SpringerPlus

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The metropolitan area of the Toluca Valley (MATV) extends over an area of 1208.55 km2 and has 1,361,500 inhabitants making it the fifth highest populated area in the country and the second highest in the state. The MATV has several environmental problems, with regards to the air quality. Particles PM10 and PM2.5 are considered to be the main pollutant due to these particles frequently exceeding the limit laid down in the standards of the air quality in the country. For this reason, samples of the mosses Fabriona ciliaris and Leskea angustata were collected at different sites in MATV, Mexico in order to establish the atmospheric deposition of heavy metals by means of the analysis of the mosses tissues. Results show the average metal concentrations in the mosses in the order of: Zn > Pb > Cr > Cd. The concentration capacities of heavy metals were higher in Fabriona ciliaris than Leskea angustata. Enrichment factors for Cr, Zn, Pb and Cd were obtained using the soils from the same sampling area. Enrichment factors results show that Cr is conservative in both sampling seasons with a terrigenous origin; Zn is moderately enriched in both sampling seasons and mainly associated to pedological-soil or substrate contribution and anthropogenic activities and Cd is highly enriched in the rainy season and Pb is highly enriched in both sampling seasons, with a predominantly anthropogenic origin. This study provides information to be considered in the strategies for similar environmental problems in the world.

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Metal content in mosses from the Metropolitan Area of the Toluca Valley: a comparative study between inductively coupled plasma optical emission spectrometry (ICP-OES) and total reflection X-ray fluorescence spectrometry (TXRF)

Cited by 18 publications

References 27 publications

Application of Neutron Activation Analysis for Determination of As, Cr, Hg, and Se in Mosses in the Metropolitan Area of the Valley of Toluca, Mexico

Application of Neutron Activation Analysis for Determination of As, Cr, Hg, and Se in Mosses in the Metropolitan Area of the Valley of Toluca, Mexico

BIOMONITOREO ACTIVO CON Leskea angustata EN LA ZONA METROPOLITANA DEL VALLE DE TOLUCA

Accumulation of heavy metals in mosses: a biomonitoring study

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