Limits...
An assessment of the levels of phthalate esters and metals in the Muledane open dump, Thohoyandou, Limpopo Province, South Africa.

Adeniyi A, Dayomi M, Siebe P, Okedeyi O - Chem Cent J (2008)

Bottom Line: The results were compared statistically.Our results revealed that the discarding of wastes into the open dump is a potential source of soil contamination in the immediate vicinity and beyond, via dispersal.Sustained monitoring of these contaminants is recommended, in addition to upgrading the facility to a landfill.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemistry, Lagos State University, Ojo, Lagos, Nigeria. lekeadeniyi@yahoo.com

ABSTRACT

Background: This work reports the determination of the levels of phthalate esters (dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), diethyl hexyl phthalate (DEHP)) and metals (lead, cadmium, manganese, zinc, iron, calcium) in composite soil samples. The soil samples were collected randomly within the Muledane open dump, Thohoyandou, Limpopo province, South Africa. Control samples were collected about 200 m away from the open dump. The phthalate esters were separated and determined by capillary gas chromatography with a flame ionization detector, whilst the metals were determined by atomic absorption spectrophotometry.

Results: Open dump values for the phthalate esters and metals to be generally higher in comparison to control samples for DMP, DEP, DBP and DEHP - the mean values calculated were 0.31 +/- 0.12, 0.21 +/- 0.05, 0.30 +/- 0.07, and 0.03 +/- 0.01 mg/kg, respectively, for the open dump soil samples. Nonetheless, the mean open dump values for lead, cadmium, manganese, zinc, iron and calcium were 0.07 +/- 0.04, 0.003 +/- 0.001, 5.02 +/- 1.92, 0.31 +/- 0.02, 11.62 +/- 9.48 and 0.12 +/- 0.13 mg/kg, respectively. The results were compared statistically.

Conclusion: Our results revealed that the discarding of wastes into the open dump is a potential source of soil contamination in the immediate vicinity and beyond, via dispersal. Increased levels of phthalate esters and metals in the soil pose a risk to public health, plants and animals. Sustained monitoring of these contaminants is recommended, in addition to upgrading the facility to a landfill.

No MeSH data available.


Representative chromatogram of the phthalate esters.
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Figure 2: Representative chromatogram of the phthalate esters.

Mentions: where, Yb = blank value; Sb = standard error of the regression line. The instrument detection limit (IDL) was calculated as described previously [52]. For recovery studies, pre-extracted soil samples were spiked in triplicate with 1 ml, 10 mg/L mixture of the phthalates. A representative chromatogram is shown in Figure 2.


An assessment of the levels of phthalate esters and metals in the Muledane open dump, Thohoyandou, Limpopo Province, South Africa.

Adeniyi A, Dayomi M, Siebe P, Okedeyi O - Chem Cent J (2008)

Representative chromatogram of the phthalate esters.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2397408&req=5

Figure 2: Representative chromatogram of the phthalate esters.
Mentions: where, Yb = blank value; Sb = standard error of the regression line. The instrument detection limit (IDL) was calculated as described previously [52]. For recovery studies, pre-extracted soil samples were spiked in triplicate with 1 ml, 10 mg/L mixture of the phthalates. A representative chromatogram is shown in Figure 2.

Bottom Line: The results were compared statistically.Our results revealed that the discarding of wastes into the open dump is a potential source of soil contamination in the immediate vicinity and beyond, via dispersal.Sustained monitoring of these contaminants is recommended, in addition to upgrading the facility to a landfill.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemistry, Lagos State University, Ojo, Lagos, Nigeria. lekeadeniyi@yahoo.com

ABSTRACT

Background: This work reports the determination of the levels of phthalate esters (dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), diethyl hexyl phthalate (DEHP)) and metals (lead, cadmium, manganese, zinc, iron, calcium) in composite soil samples. The soil samples were collected randomly within the Muledane open dump, Thohoyandou, Limpopo province, South Africa. Control samples were collected about 200 m away from the open dump. The phthalate esters were separated and determined by capillary gas chromatography with a flame ionization detector, whilst the metals were determined by atomic absorption spectrophotometry.

Results: Open dump values for the phthalate esters and metals to be generally higher in comparison to control samples for DMP, DEP, DBP and DEHP - the mean values calculated were 0.31 +/- 0.12, 0.21 +/- 0.05, 0.30 +/- 0.07, and 0.03 +/- 0.01 mg/kg, respectively, for the open dump soil samples. Nonetheless, the mean open dump values for lead, cadmium, manganese, zinc, iron and calcium were 0.07 +/- 0.04, 0.003 +/- 0.001, 5.02 +/- 1.92, 0.31 +/- 0.02, 11.62 +/- 9.48 and 0.12 +/- 0.13 mg/kg, respectively. The results were compared statistically.

Conclusion: Our results revealed that the discarding of wastes into the open dump is a potential source of soil contamination in the immediate vicinity and beyond, via dispersal. Increased levels of phthalate esters and metals in the soil pose a risk to public health, plants and animals. Sustained monitoring of these contaminants is recommended, in addition to upgrading the facility to a landfill.

No MeSH data available.