Heavy metals in the fine fraction of coastal sediments from Baja California (Mexico) and California (USA)

Villaescusa-Celaya, J.A.; Gutiérrez-Galindo, E.A.; Flores-Muñoz, G.

doi:10.1016/s0269-7491(99)00222-5

Cited by 77 publications

(40 citation statements)

References 34 publications

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“…Comparison of Psyttalia to the Point Loma wastewater treatment plant of San Diego, California, USA, which is also a primary treatment facility processing 704000 m 3 of wastewater daily, showed that both facilities discharge similar quantities of dissolved Zn and Pb into the sea, while Psyttalia discharges higher quantities of Ni and Cr and Point Loma discharges higher quantities of Cu and Cd (RACO-RANDS 1997;VILLAESCUSA-CELAYA 2000).…”

Section: Discussionmentioning

confidence: 99%

The removal of trace metals at the wastewater treatment plant of Psyttalia

Firfilionis

Paraskevopoulou

Vilioti³

et al. 2004

Medit. Mar. Sci.

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The present study investigates the levels of trace metals in the input and output of the Psyttalia wastewater treatment plant, as well as the removal of the various trace metal forms (dissolved, particulate) during primary sedimentation. The trace metals determined were: Pb, Cd, Cu, Zn, Cr, and Ni. The experimental procedure included the collection and analysis of inflow and outflow samples. Dissolved and particulate forms were separated by filtration through 0.45 and 8 Ìm Millipore filters and trace metals were determined using atomic absorption spectrometry. The results indicate that particulate matter consists mainly of large particles (>8 Ìm) and the sedimentation process is more effective in their removal in contrast to smaller particles. The removal of trace metals during primary sedimentation follows the decreasing sequence: Particulate metal in large particles > Particulate metal in small particles > Dissolved metal. Concerning the various metals the removal follows the sequence: Pb = Cu>Zn = Cr>Cd>Ni. The quantities of trace metals that are discharged to the sea through the outflow pipes of the Psyttalia treatment plant follow the decreasing sequence: Zn >> Cr > Cu > Ni > Pb > Cd.

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Section: Discussionmentioning

confidence: 99%

The removal of trace metals at the wastewater treatment plant of Psyttalia

Firfilionis

Paraskevopoulou

Vilioti³

et al. 2004

Medit. Mar. Sci.

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“…Geochemical approaches have also been successfully used to estimate the impact of human activities on sediments (14,30,31). Similarly, the partitioning pattern of metals was important to the potential toxicity and mobility of contaminant metals (32).…”

Section: Discussionmentioning

confidence: 99%

Assessment of Heavy Metal Contamination in Surface Sediment of the Darreh-Morad Beyg River

2016

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Background and Purpose: The heavy metal pollution and its fractionations in the surface sediments of Darreh-Morad Beyg River, Hamedan City were monitored for Cd, Cr, Cu, Fe, Ni, Pb, and Zn in 2014. Materials and Methods: Totally 30 surface sediment samples were taken from 10 stations with three replicates. The samples subjected to bulk digestion and chemical partitioning. The concentrations of heavy metals in sediment were determined by ICP-OES. I-geo, EF, CF, and PLI were also used to assess the sediment contamination. Results:The results of the present study showed that the proportions of residual fraction for Cu, Ni, Pb, Cd and especially Cr (93.61%) were relatively high, which implied their lower pollution risks due to low mobility characterization, while Zn was mainly associated with the anthropogenic portion of the existing pollution which meant an increase in mobility for this element. Also, on the basis of the mean, the I-geo values of metals were found in the following order: Cr>Cu>Zn>Ni>Pb>Fe>Cd. At the same time, the average EF of metals in the sediment samples was in the order of Cr>Cu>Zn>Ni>Pb>Fe>Cd. According to the calculated PLI, the pollution class of heavy metals in sediments from the Darreh-Morad Beyg River was between 1 and 2, indicating a moderately polluted degree. Conclusion: Regarding the high Zn concentrations in sediments, it is likely that this element is a major hazard for the aquatic environment since it is mainly found in the anthropogenic portion. Also, Cu, Ni, Pb, Cd, and Cr are present in the greatest percentages in the residual fraction, which implies that these metals are strongly linked to the sediments.

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“…Clustering can also occur among sites that are geographically separated but have similar metal ratio concentrations or similar levels of pollution (Poulton, 1989;Villaescusa-Celaya et al, 2000;Tranchina et al, 2008). As shown in Figure 7, the dendrogram suggests a separation into five different groups:…”

Section: Correlationmentioning

confidence: 96%

“…The concentrations of trace element are usually controlled by a variety of physical and chemical factors (Villaescusa-Celaya et al, 2000;Angelidis 2005) such as grain particle size distribution, composition, particle transport, mineralogical composition, oxidation/reduction reactions and adsorption/desorption processes. As trace elements and organic carbon are usually associated with fine-grained sediments because of their high surface to volume ratios and adsorption capacities (Burdige, 2006), <63 µm particles are usually selected for control of sediment contamination (Szava-Kovats, 2008).…”

Section: Introductionmentioning

confidence: 99%

Trace elements in different marine sediment fractions of the Gulf of Tunis (Central Mediterranean Sea)

Zaaboub

Oueslati²,

Helali³

et al. 2014

Chemical Speciation & Bioavailability

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Over several decades, the mouth of the Mejerda River (northern Tunisia) has received large amounts of mining tailings mainly containing Pb, Zn and Ba. We have measured the concentrations of major and trace elements (Al, Ti, P, K, Mg, Na, Ca, S, Fe, Cl, V, Cr, Co, Ni, Cu, Zn, Ga, Br, Rb, Sr, Y, Zr, Nb, I, Ba and Pb) in three different fractions of 45 surficial sediments using wavelength dispersive X-ray fluorescence. The size distribution of fine particles (<2 µm, 2-20 µm, 20-63 µm) revealed that clay and silt compounds were predominant (75-95%) in the deeper estuarine region. These condensed clay phases were mainly dioctahedral smectite, illite and kaolinite. The total organic carbon (TOC) concentration varies from 0.08 to 1.37 %. The C:N ratio varies from 1 to 17 indicating that the organic matter has a mixed marine and continental origin principal component analysis was used to determine the associations of trace elements with organic and/or inorganic phases of the sediment fractions. The correlations of Fe 2 O 3 , MnO 2 and P 2 O 5 with trace elements showed that amorphous Fe and Mn were the most active scavengers of dissolved metals from the Mejerda River. Cluster analysis clearly distinguished local trace element accumulations according to grain size fractions (< 2 µm and 2-20 µm) near the Ghar el Melh Lagoon and the Mejerda River.

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Heavy metals in the fine fraction of coastal sediments from Baja California (Mexico) and California (USA)

Cited by 77 publications

References 34 publications

The removal of trace metals at the wastewater treatment plant of Psyttalia

The removal of trace metals at the wastewater treatment plant of Psyttalia

Assessment of Heavy Metal Contamination in Surface Sediment of the Darreh-Morad Beyg River

Trace elements in different marine sediment fractions of the Gulf of Tunis (Central Mediterranean Sea)

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