Creek and Glenburn - Limnology - Lecture Slides, Slides of Biology

Download Creek and Glenburn - Limnology - Lecture Slides and more Slides Biology in PDF only on Docsity! Ackerly Creek and Glenburn Pond Chromium Contamination Docsity.com Glenburn and Precision National Plating • Plating until 1999 • Contaminated soil and ground water • Chromium ran down Ackerly Creek to Glenburn pond • Removed contaminated soils • Set up catch system • Several CaS₅ injection Docsity.com Chromium-6  Mobile in neutral or alkaline pH soils (i.e. most)  Carcinogenic to humans and animals  Inhibits growth of plants  Chlorine changes Cr III to Cr VI  No current limit set on permissible levels in drinking water  Canada is 0.05 mg/L Docsity.com Environmental Risk Assessment of 2003  Glenburn Pond/Ackerly Creek elevated Chromium  Believed little to no risk to aquatic, benthic or terrestrial communities  No risk of bioaccumulation  Removal of dam a potential positive Docsity.com Chromium toxicity in Animals  Easily penetrates cell membrane  Some Cr VI naturally changes to Cr III in GI track  Most released in feces and urine  Cause: – Lung, liver and stomach cancer – Liver, spleen, bone, kidney, lung retention – Birth defects – Anemia – Compensatory hematopoietic response Docsity.com