Open AccessHeavy-Metals as Environmental Health Indicator of the Lagos Lagoon Complex, Nigeria
Publication year - 2020
Publication title -
journal of marine science research and oceanography
Language(s) - English
Resource type - Journals
ISSN - 2642-9020
DOI - 10.33140/jmsro.03.01.02
Subject(s) - heavy metals , atomic absorption spectroscopy , environmental chemistry , potassium , sediment , fish <actinopterygii> , pollution , chemistry , cadmium , nickel , environmental science , ecology , fishery , biology , paleontology , physics , organic chemistry , quantum mechanics
The study was conducted on heavy metals contents of water, fish tissues and sediment from Lagos lagoon complex, Nigeria.The aim was to assess the current environmental health/pollution status of the lagoon from three sample stations: Ologelagoon [1], Badagry creek [2] and Lagos island [3]; each having three (3) hotspots. In all, twelve (11) heavy metals weredetermined between June and November, 2018. Heavy metals: Zn, Fe, Pb, Cu, Na, Potassium, Ca, Mn, Cd, Hg and Nickelwere determined using Atomic absorption spectrophotometer (AAS). Results of mean Heavy metals in fish tissues were: Zn(0.741±0.38), Fe (5.59±8.32), Pb (0.12±0.17mg/l), Cu (0.16±0.25), Na (9.38±0.25), Ca (116.68±41.53), Mn (0.76±0.96), Pb(0.01±0.0), Cd (0.02±0.0), Potassium (12.09±2.34), Ni (0.02±0.02) and Hg (0.01±0.0). Statistical analysis showed variationsin the distribution of Heavy metals which are mostly within recommended limits of WHO, FME, & LASEPA. Except for iron(Fe), which was found in excess in fish tissues, and other metals (lead), found in higher conc. in sediments than in waterand fish tissues combined. This is indicative of heavy metals bio-accumulation in the study area.