TRACE METALS BINDING TO HUMIC AND FULVIC ACIDS FROM SURFACIAL SEDIMENTS OF LAKE MANZALAH, EGYPT. | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 1, Volume 10, Issue 2, April 2006, Page 1-17 PDF (873.53 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.2006.1844 | ||||
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| Authors | ||||
| Mohamed Okbah1; Mohamed Hatned2 | ||||
| 1National Institute of Oceanography and Fisheries, kayet bay, Alexandria, Egypt | ||||
| 2National Institute of Oceanography and Fisheries, Suez, Egypt | ||||
| Abstract | ||||
| Twelve sediment samples were collected from Lake Manzalah during summer, 2004 to examine the influence of dissolved humic and fulvic acids on the distribution of trace metals in surficial sediments of the Lake. Trace metal concentrations in the humic acid extracted from the Lake sediments showed considerably high contents of iron (1046-3069 ng/g); copper (234-1498 jig/g) and zinc (110-394 jig/g) . The other trace metals (Co, Cd, Cr, Ni and Mn) revealed low concentrations, ranging from 11.3 to 156 ixgJg. The metal concentrations in fulvic acid were in the following order; Fe (465-2767 ^Lg/g); Cu (49.6-250.6 jag/g); Zn (49.3-186.6 ng/g); Cd (39.6-80.8 pg/g); Ni (20.4-153.4 jxg/g); Co (12.5-78.0 jxg/g); Mn (11.8-55.9 ^ig/g) and Cr (9.1-39.6 ng/g). The values of Cu and Cd percentage associated with the humic acid were high comparing with that reported in the other metals. This relative percentage was decreased for the same metals in association with fiilvic acid. In general, the results indicated that the amounts of trace metals in humic acids decreased as follows: Fe > Cu >Zn > Ni > Co > Cd > Mn > Cr. While in fulvic acid the order was: Fe > Cu >Zn > Cd > Ni > Co > Mn > Cr. | ||||
| Keywords | ||||
| trace metals; Humic acid; Fulvic acid; Lake Manzalah; sediments | ||||
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