scholarly journals Evaluation of persistent organochlorine pesticides and polychlorinated biphenyls in Umgeni River bank soil, KwaZulu-Natal, South Africa

Water SA ◽  
2019 ◽  
Vol 45 (4 October) ◽  
Author(s):  
Emmanuel Gakuba ◽  
Brenda Moodley ◽  
Patrick Ndungu ◽  
Grace Birungi
Keyword(s):  
South Africa ◽  
Polychlorinated Biphenyls ◽  
Organochlorine Pesticides ◽  
Treatment Plant ◽  
Dry Weight ◽  
Gas Chromatography Mass Spectrometry ◽  
River Bank ◽  
Persistent Organochlorine ◽  
Kwazulu Natal ◽  
Mean Concentration

This study investigated the presence and distribution of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in soil collected along the banks of the Umgeni River, one of the largest rivers in the province of KwaZulu-Natal, South Africa. The analysis was performed using gas chromatography-mass spectrometry (GC-MS). The results showed that the levels of OCPs ranged from 3.58±0.09 ng/g for hexachlorobenzene (HCB) to 82.65±2.82 ng/g for HCH, with an individual mean concentration of 24.33±2.00 ng/g dry weight (dw). The levels of PCBs ranged from 10.46 ng/g for PCB105 to 89.46 ng/g for PCB180, with an average PCB value of 25.47±1.26 ng/g, dw. The highest levels of OCPs and PCBs were found at Northern Wastewater Treatment Plant (mean OCP: 32.39±3.97 ng/g and PCB: 67.87±1.67 ng/g). The two most abundant contaminants in the river were endrin and PCB180.

scholarly journals Partition distribution of selected organochlorine pesticides in water, sediment pore water and surface sediment from uMngeni River, KwaZulu-Natal, South Africa

Water SA ◽  
2018 ◽  
Vol 44 (2 April) ◽  
Author(s):  
E Gakuba ◽  
B Moodley ◽  
P Ndungu ◽  
G Birungi
Keyword(s):  
South Africa ◽  
Wastewater Treatment ◽  
Surface Water ◽  
Organochlorine Pesticides ◽  
Pore Water ◽  
Surface Sediment ◽  
Gas Chromatography Mass Spectrometry ◽  
Sediment Pore Water ◽  
Sediment Samples ◽  
Kwazulu Natal

Organochlorine pesticides (OCPs) were analysed in surface water, pore water and surface sediment samples collected from the uMngeni River, which is one of the largest rivers in the province of KwaZulu-Natal, South Africa. Liquid-liquid extraction was used to extract the analytes from water and pore water samples and soxhlet extraction was used to extract sediment samples with subsequent florisil clean-up and gas chromatography-mass spectrometry (GC-MS) analysis. Twelve selected OCPs were analysed and their total concentrations were found to range from 8.04–21.06 ng/mL, 36.06–188.43 ng/mL and 148.17–554.73 ng/g in unfiltered surface water, unfiltered pore water and surface sediment (dry weight (dw)), respectively. The results indicated that the concentrations of these selected pesticides were far higher in sediment (72%) than in pore water (25%) and water (3%). The most polluted sites were Northern Wastewater Treatment influent (NWTI) for water (Σ12 OCP = 19.41 ± 1.43 ng/mL) and Northern Wastewater Treatment effluent (NWTE) for pore water (Σ12 OCP = 166.23 ± 7.16 ng/mL) and sediment (Σ12 OCP = 495.21 ± 32.38 ng/g). The most abundant individual OCPs and their average concentrations in general in the river were p,p′-DDE in unfiltered water (1.62 ±0.22 ng/mL) and unfiltered sediment pore water (17.09 ±7.96 ng/mL), and endrin in surface sediment (55.57 ± 19.01 ng/g, dw).

Occurrence of Organochlorine Pesticides and Polychlorinated Biphenyls in Six Fish Species from Baihua Lake, China

2011 ◽  
Vol 347-353 ◽  
pp. 2073-2077 ◽  
Author(s):  
Jin Luo ◽  
Chun Liu ◽  
Ji Wei Hu ◽  
Li Ya Fu ◽  
Xiao Fei Jin
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Polychlorinated Biphenyls ◽  
Organochlorine Pesticides ◽  
Fish Species ◽  
Total Concentration ◽  
Dry Weight ◽  
Gas Chromatography Mass Spectrometry ◽  
Muscle Tissues ◽  
Guiyang City

Baihua Lake, a man-made reservoir located in a typical plateau karstic area, is one of the five drinking water sources for Guiyang city. In the present research, the organochlorine pesticides and polychlorinated biphenyls in the muscle tissues of six fish species collected from Baihua Lake were estimated by gas chromatography/mass spectrometry (GC/MS) . The total concentration of OCPs ranged from 2.83 to 94.25 ng g-1 (dry weight), and that of PCBs ranged from ND to 4.78 ng g-1. p,p’-DDD, p,p’-DDE, γ-HCH and PCB28 were detected in the majority of the samples. However the biomagnifications of OCPs and PCBs were not significant in the selected fish from the lake.

scholarly journals Serum levels of organochlorine pesticides and polychlorinated biphenyls among inhabitants of Greater Metropolitan Rio de Janeiro, Brazil

2002 ◽  
Vol 18 (2) ◽  
pp. 519-524 ◽  
Author(s):  
Isabella Fernandes Delgado ◽  
Heloisa H.C. Barretto ◽  
Teresa A. Kussumi ◽  
Irene Baptista Alleluia ◽  
Cenira de A. Baggio ◽  
...  
Keyword(s):  
Detection Limit ◽  
Polychlorinated Biphenyls ◽  
Organochlorine Pesticides ◽  
Rio De Janeiro ◽  
Serum Lipids ◽  
Serum Levels ◽  
Electron Capture Detection ◽  
Persistent Organochlorine ◽  
Alpha Beta ◽  
Janeiro City

Levels of persistent organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) were determined in the blood serum of people living and working in the urban area of greater Rio de Janeiro city. Blood samples from 33 volunteers (16 males, 17 females, 19-63 years old) were taken in January 1999. OCP residues (op'DDT, pp'DDT, pp'DDD, pp'DDE, Aldrin, Dieldrin, Endrin, Heptachlor, Heptachlor-epoxide, alpha-, beta- and gamma-Hexachlorocyclo-hexane, Hexachlorobenzene) and PCBs (congeners: 28, 52, 101, 138, 153, 180) were extracted with n-hexane and analyzed by gas chromatography with electron capture detection. Except for pp'DDE (detection limit = 1.4µg/L) no other OCP residue was found in the samples. No PCB congener (detection limit = 2.0µg/L) was detected either. pp'DDE was found in 17 out of 33 samples in concentrations that ranged from 1.4 to 8.4 µg/L of serum or, on a fat basis, from 0.200 to 3.452 µg/g of serum lipids. Percentage of positive samples (%) and levels of pp'DDE (range of positive samples) increased from the youngest to the oldest group (<=29 yrs: 10%, 0.278µg/g; 30-39 yrs: 60%, 0.200-0.765µg/g; > or = 40 yrs: 77%, 0.257-3.452µg/g).

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