| TANG Yijie,FANG Zhanqiang,YU Shixiao. 2008. Heavy metals,polycyclic aromatic hydrocarbons and organochlorine pesticides in the surface sediments of mangrove swamps from coastal sites along the Leizhou Peninsula, South China. Acta Oceanologica Sinica, (1):42－53 |
| Heavy metals,polycyclic aromatic hydrocarbons and organochlorine pesticides in the surface sediments of mangrove swamps from coastal sites along the Leizhou Peninsula, South China |
| Heavy metals,polycyclic aromatic hydrocarbons and organochlorine pesticides in the surface sediments of mangrove swamps from coastal sites along the Leizhou Peninsula, South China |
| Received:April 25, 2007 Revised:September 12, 2007 |
| DOI： |
| Key words:sediment mangrove swamps heavy metals PAHs DDTs HCHs |
| 中文关键词: sediment mangrove swamps heavy metals PAHs DDTs HCHs |
| 基金项目:Zhang Hongda Science Research Fund of Sun Yat-sen University;the Young and Middle-aged Excellet Reacher's Research Fund of Guangdong Education Institute in China. |
| Author Name | Affiliation | E-mail | | TANG Yijie | State Key Labrabory of Biocontrol, Department of Ecology, School of Life Science, Sun Yat-sen University, Guangzhou 512075, China
Department of Biology, Guangdong Education Institute, Guangzhou 510303, China | | | FANG Zhanqiang | School of Life Science, South China Normal University, Guangzhou 510631, China | | | YU Shixiao | State Key Labrabory of Biocontrol, Department of Ecology, School of Life Science, Sun Yat-sen University, Guangzhou 512075, China | lssysx@mailsysu.edu.cn |
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| Abstract: |
| Contents of heavy metals, polycyclic aromatic hydrocarbons (PAHs), dichlorodiphenyltrichloroethanes (DDTs) and hexachlorcyclohexanes (HCHs) in surface sediments from mangrove areas of the Leizhou Peninsula were analyzed in July and November 2005. Risk assessment criteria applied by Long E R et al. (1995) and Long E D et al. (1998) (effects range low, ERL; effects range mean, ERM) of chemicals in sediments from the gulf or estuary were used to assess the potential ecological risks of heavy metals, PAHs, DDTs and HCHs to aquatic organisms in the studied area. The results indicated that the average contents of zinc, nickel, chromium, lead, copper, arsenic and mercury were (61.97±55.87), (59.99±39.01), (47.93±28.37), (26.64±13.00), (23.45±41.96), (9.32±3.62), (0.14±0.18) mg/kg in dry weight in the sediment samples collected from five studied sites in the Leizhou Peninsula, respectively. Cadmium was not calculated due to its content being below the detection limit (< 0.3 mg/kg). The average levels of Cr, Cu, Ni, Pb, Zn and Hg exceed their background values. The average contents of Ni were higher than ERM. The contents of PAHs in the sediments from the five studied sites were (79.78±43.70) ng/g in dry weight, far lower than ERL(4 022 ng/g). The contents of DDE, DDD and DDTs in the sediments from five studied sites were (2.60±4.68), (17.52±27.25), (27.78±46.64) ng/g in dry weight respectively, clearly higher than ERL, and the average contents of DDT were (7.66±15.93) ng/g in dry weight, much higher than ERM. HCHs could be detected in the sediments only from Gaoqiao sampling site, with the average contents (0.07±0.08) ng/g in dry weight. |
| 中文摘要: |
| Contents of heavy metals, polycyclic aromatic hydrocarbons (PAHs), dichlorodiphenyltrichloroethanes (DDTs) and hexachlorcyclohexanes (HCHs) in surface sediments from mangrove areas of the Leizhou Peninsula were analyzed in July and November 2005. Risk assessment criteria applied by Long E R et al. (1995) and Long E D et al. (1998) (effects range low, ERL; effects range mean, ERM) of chemicals in sediments from the gulf or estuary were used to assess the potential ecological risks of heavy metals, PAHs, DDTs and HCHs to aquatic organisms in the studied area. The results indicated that the average contents of zinc, nickel, chromium, lead, copper, arsenic and mercury were (61.97±55.87), (59.99±39.01), (47.93±28.37), (26.64±13.00), (23.45±41.96), (9.32±3.62), (0.14±0.18) mg/kg in dry weight in the sediment samples collected from five studied sites in the Leizhou Peninsula, respectively. Cadmium was not calculated due to its content being below the detection limit (< 0.3 mg/kg). The average levels of Cr, Cu, Ni, Pb, Zn and Hg exceed their background values. The average contents of Ni were higher than ERM. The contents of PAHs in the sediments from the five studied sites were (79.78±43.70) ng/g in dry weight, far lower than ERL(4 022 ng/g). The contents of DDE, DDD and DDTs in the sediments from five studied sites were (2.60±4.68), (17.52±27.25), (27.78±46.64) ng/g in dry weight respectively, clearly higher than ERL, and the average contents of DDT were (7.66±15.93) ng/g in dry weight, much higher than ERM. HCHs could be detected in the sediments only from Gaoqiao sampling site, with the average contents (0.07±0.08) ng/g in dry weight. |
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