کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4422134 1308532 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Relationships between physicochemical parameters and the toxicity of leachates from a municipal solid waste landfill
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Relationships between physicochemical parameters and the toxicity of leachates from a municipal solid waste landfill
چکیده انگلیسی

Landfills are used to dispose municipal solid wastes, and although on-site recycling in these places is an extensive practice in Latin America, diverse pollutants are incorporated into the leachates. The objective of this work was to establish relationships between composition and toxicity of leachates from the landfill of the city of Cartagena, Colombia. Leachates were characterized measuring Cd, Ni, Hg, Mn, Cu, and Pb concentrations, and physicochemical parameters including pH, conductivity, chemical oxygen demand (COD), and hardness. Bioassays were conducted diluting with synthetic sea water, recording toxicity against Artemia franciscana as median lethal concentrations (LC50 values) after 24 and 48 h exposure. Average LC50 values oscillated between 3.20% and 39.33% (v/v). Multivariate analysis showed that toxicity was dependent on Cd and COD. The slope of the concentration–response curve correlated with Ni concentration independently from toxicity. Results suggest toxicity of these leachates depends on Cd concentrations associated with organic matter, this effect being modulated by Ni.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 70, Issue 2, June 2008, Pages 294–299
نویسندگان
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