RT journal article
T1 Assessment of the metal pollution, potential toxicity and speciation of sediment from Algeciras Bay (South of Spain) using chemometric tools
A1 Díaz de Alba, Margarita Isabel
A1 Galindo Riaño, María Dolores
A1 Casanueva Marenco, María José
A1 García Vargas, Manuel
A1 Kosore, C.M.
A2 Química Analítica
K1 available metal
K1 sediment
K1 total metal
K1 speciation
K1 anthropogenic pollution
AB A study to determine total and mobile heavy metals concentrations in sediments from Algeciras Bay was performed and pollution hotspots were identified. The effects on aquatic organisms were established using sediment quality guidelines (SQGs). Ni and Cr exceeded the effect range medium and low levels, respectively, around industrial area. Potential toxicity of metals was determined by diethylenetriaminepenta-acetic acid (DTPA) extractions and low alert levels of Co, Cu, Zn, Cd, Ni and Pb were exceeded at most sampling sites. Three pollution indicators were used showing significant values for As, Ni, Cr, Pb and Cd. Sediment speciation using the sequential extraction BCR procedure was carried out, being Cd, Zn, Pb and As the most available metals. Principal component, cluster and ANOVA analyses were performed in order to assess the sources of metals and the influence of seasonality andanthropogenic activities on the sediment quality. Two principal component analysis (PCA) factors wereobtained identifying the sampling sites affected by anthropogenic activities; Ni–Cr and Zn–Cu–V clusterswere also obtained associated with stainless steel and petrochemical industrial activities.ANOVAshowedthe outstanding sites because of total metal concentration and significant differences among sampling sites by the acid extractable and reducible fractions for all metals except for Ba and V.
SN 0304-3894
YR 2011
FD 2011
LK http://hdl.handle.net/10498/33267
UL http://hdl.handle.net/10498/33267
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-nov-2026