Coastal Dump Sites in the Lagos lagoon and toxicity of their leachate on brackish water shrimp ( Palaemonetes africanus )

Journal of Applied Sciences and Environmental Management

AMAEZE, NNAMDI HENRY¹  ABEL-OBI, CHIBUEZE JACKSON¹ 

关键词: Aquatic Pollution;    Waste Management;    Environmental Policy;    Solid Waste;    Waste Recycling;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

An assessment of the coastal dumpsites and their impacts on shrimp mortality inthe Lagos lagoon was investigated. The study involved a census of dumpsites in the majorsections of the coastline associated with anthropogenic activities, followed by specific bioassayto determine the acute toxicity of leachates from one of the dump sites. Our investigationsrevealed that there were 8 major dumping localities with approximately 28 dumpsitesgenerated mostly by deliberate efforts and in some cases by tidal activities which litter thecoastline. The major dumping localities were Abule Eledu, Ebute Ilaje, Oworonshoki, Ibese,Offin, Off Ozumba Mbadiwe Road, Iddo and Okobaba. The largest number of dumpsites wasrecorded at Owonronshoki and Ibeshe, each with 19% of the total dumps while the leastnumber was recorded at Off Ozumba Mbadiwe Road (4%). The major waste categoriesinclude fabrics (worn clothes), plastics, wood and wood shavings, glass, metallic objects aswell as paper and packaging materials. The acute toxicity assessment of leachates from adumpsite at Abule Eledu indicated moderate toxicity to brackish water shrimps (Palaemonetes africanus) with 96 hr LC50 value of 93.59% (935.9ml/L). The leachate was found to be highon biological and chemical oxygen demand, conductivity, total dissolved solids, nitrate andsulphate. The findings from this study indicate widespread and unregulated practice of coastalsolid waste dumping with potential effects on water quality and biota. The need for improvedwaste management system in the City of Lagos was discussed.

【 授权许可】

Unknown