Assessment of heavy metals concentrations in different parts of Diplazium esculentum in selected riverine system of Bunawan, Agusan del Sur, Philippines

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Research Paper 01/12/2021
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Assessment of heavy metals concentrations in different parts of Diplazium esculentum in selected riverine system of Bunawan, Agusan del Sur, Philippines

Vivian C Peligro
J. Bio. Env. Sci.19( 6), 106-114, December 2021.
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Heavy metals are essential for the proper functioning of the biological systems but their deficiency or excess could lead to several disorders. Thus, this study aimed to assess the levels of heavy metals (lead, chromium, cadmium) concentrations of Diplazium esculentum in the selected riverine system of Bunawan, Agusan del Sur. Three (3) sub-stations were established in each area. Selected physicochemical parameters were determined. Two (2) kilograms of plant samples were collected in each site separating the roots, stems, and fronds. Both water and plant samples were subjected to acid digestion and were analyzed using the MP-AES method. Results revealed that all the physicochemical properties were within the desirable limits except for the dissolved oxygen in station 1 (Agsao River). Heavy metals concentrations were compared to the standard value set by USEPA and WHO. Lead and chromium concentrations in water samples were within the standard limit. However, cadmium was below the detectible limit in both water and plant samples in all stations. Moreover, lead and chromium contents of D. esculentum in all parts across all stations were remarkably higher than tolerable limits. The highest accumulation was on its roots because it is responsible for the uptake of nutrients including pollutants. Hence, D. esculentum is a good Pb and Cr accumulator. Furthermore, constant monitoring and evaluation for the heavy metal’s concentrations in the sampling stations both in water and plant samples are necessary. Likewise, the levels of heavy metal pollutants must be checked before consumption to ensure safe use of this plant.


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