Bioaccumulation of some of the heavy metals in the total soft-tissue of polymesoda expansa collected from the mangrove area of kondopi, Kudat, Sabah

Sollyantianna Edward, (2014) Bioaccumulation of some of the heavy metals in the total soft-tissue of polymesoda expansa collected from the mangrove area of kondopi, Kudat, Sabah. Universiti Malaysia Sabah. (Unpublished)


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The purpose of this study is to investigate the bioaccumulation of the heavy metal (Cu, Fe, Cd, Zn and Pb) in the total soft-tissue of P. expansa and surface sediment. The result of this study is compared with the standard for fish and fishery products in the Food Act 1983 for the P. expansa and the EPA guidelines for the sediment. The total of P. expansa collected were 60 individuals and a total of 16 samples of sediments for the 2 samplings made in January and February 2014 located at the mangrove area near Kondopi village, Kudat. The total soft-tissue is digested using nitric acid and the sediment is digested using aqua regia. The mean concentration in the P. expansa for January’s sampling for the heavy metals Cu, Fe, Cd, Zn and Pb are 12.00 ± 3.98 mg/kg, 92.77 ± 91.49 mg/kg, 4.12 ± 0.76 mg/kg, 99.22 ± 51.92 mg/kg, 7.16 ± 3.89 mg/kg respectively while the mean concentration in the sediment are 42.41 ± 6.07 mg/kg in Cu, 2150.45 ± 1075.76 mg/kg in Fe, 11.27 ± 2.56 mg/kg in Cd, 78.25 ± 50.42 mg/kg in Zn, and 25.36 ± 11.56 mg/kg in Pb. Meanwhile in February, the concentration of Cu, Fe, Cd, Zn and Pb in the P. expansa are 3.36 ± 1.39 mg/kg, 65.20 ± 22.29 mg/kg, 2.01 ± 0.38 mg/kg, 62.01 ± 55.23 mg/kg and 2.87 ± 1.50 mg/kg respectively while the heavy metal concentrations in the sediment are 52.15 ± 5.01 mg/kg for Cu, 1610.23 ± 433.70 mg/kg for Fe, 12.10 ± 1.45 mg/kg for Cd, 169.57 ± 54.72 mg/kg for Fe and 27.64 ± 12.38 for Pb. For P. expansa, the highest mean concentration for January is Zn while Fe is the highest heavy metals mean concentration in February. In the sediment, Fe is the highest heavy metal mean concentration in both months. The bioaccumulation factor shows the highest value for Zn which is 1.80. According to the Pearson’s correlation tested, there are statistically significant correlations among some the heavy metals in the P. expansa and sediment. One-Way ANOVA test showed no statistically significant mean difference in the sediment sampling between January and February. However, for P. expansa, all of the heavy metals studied showed a statistically significant mean difference between the months January and February except for Fe, which has a p>0.05.

Item Type: Academic Exercise
Uncontrolled Keywords: Heavy Metals, Mollusks , Metallothionein , P. expansa’s Soft-Tissue
Subjects: Q Science > QD Chemistry
T Technology > TD Environmental technology. Sanitary engineering
Divisions: FACULTY > Faculty of Science and Natural Resources
Depositing User: Unnamed user with email
Date Deposited: 26 Oct 2016 06:06
Last Modified: 10 Oct 2017 08:32

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