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ACADEMICIA: An International Multidisciplinary Research Journal
Year : 2019, Volume : 9, Issue : 4
First page : ( 77) Last page : ( 92)
Online ISSN : 2249-7137.
Article DOI : 10.5958/2249-7137.2019.00056.9

Evaluating ecological risks of pollutants on sefidrood river

Mohebbi Nahid1, Jafarnouri2, Khorasani Nematollah3, Riazi Borhan3, Jafari Nasim4

1Student, Department of Environmental Management, Science and research Branch, Islamic Azad University, Tehran, Iran, Email id: nsamohebbi@yahoo.com

2Department of Environmental Health engineering, School of Public Health, Tehran University of Medical Science, Tehran, Iran

3Department of Biodiversity, Science and research Branch, Islamic Azad University, Tehran, Iran

4HSEQ Advisor, Select Solutions, Sydney, Australi

Online published on 10 May, 2019.

Abstract

Ecological risk assessment was performed on phosphor and nitrogen concentration of Sefidrood River and its tributaries to respond to concerns that swages entrances may be damaging aquatic ecosystems. Tier model were used to evaluate hazard quotient and risk classification to aquatic biota from pollutants and toxicity values were compiled for LC50 of 5 indicators. Results have shown while distance has increased from the discharge of untreated wastewater into the river, phosphorous concentration and risk factor also decreased. The amount of dissolved oxygen is inversely proportional to the concentration of phosphorus. Nitrogen has less linear relationship and it would be declined in distance, and then remain constant and then it gives ascending trend.

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Keywords

Screening Level, TIER, Discharge, Relationship, Risk Classification.

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