Cadmium, chromium and zinc contents of water hyacinth (Eichhornia crassipes (Mart.) Solms) from six sampling sites in Laguna de Bay

Date

11-1991

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Lilia S. P. Madamba

Abstract

Water hyacinth , Eichhornia crassipes (Mart.) Solos. were collected from six tributaries of Laguna de Bay (Lumban, Sta. Cruz, San Juan, San Cristobal, Biaan and San Pedro rivers) at approximately four week intervals from June to September, 1989. The samples were analyzed for cadmium, chromium and zinc by atomic absorption spectrophotometry.

The highest mean concentrations for cadmium and chromium were found in roots, less in stems and least in leaves with mean values of 0.915, 0.473 and 0.405 ppm for cadmium, respectively, and 13.334, 1.638 and 1.178 ppm for chromium, respectively. For zinc, roots had the highest mean value of 179.549 ppm , followed by leaves with mean value of 44.916 ppm. Stems had the lowest mean value of 39.15.2 ppm. Spatial and seasonal variations in plant tissue concentrations for the three metals are highly significant at 5% level .

The accumulation potential of water hyacinth or concentration factor (CF) (dry basis), for cadmium ranged from 70 to 570 in leaves, 67 to 670 in stems and 190 to 1060 in roots; for chromium, the concentration factors ranged from 26 to 743 in leaves, 62 to 747 in stems and 180 to 6018 in roots while for zinc , it ranged from 568 to 5288 in leaves, 656 to 4396 in stems and 3574 to 31293 in roots.

It has been shown that water hyacinth has high tolerance for cadmium, chromium and zinc and can be used to lessen the heavy metal burden in water bodies.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1991 C4 R48

Document Type

Thesis

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