A Study on the Ecological Risk of Polluted River Sediments in Rural Area

Lei Chao; Su Chen; Xian Ming Lang; Cheng Hu

doi:10.4028/www.scientific.net/AMR.610-613.634

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 610-613A Study on the Ecological Risk of Polluted River...

A Study on the Ecological Risk of Polluted River Sediments in Rural Area

Abstract:

In order to fully understand the heavy metal and mineral oil in sediments of Tiaozi River and their potential ecological hazard levels, sediment samples at upper reaches, middle reaches and lower reaches of Tiaozi River are collected. Various heavy metals, such as Cu, Pb, Cd, Cr, and mineral oil are tested, and the toxicological analysis of sediments at various sampling points is conducted. Results show that all sediments have pollutants accumulated. Content of mineral oil is 2400-4900mg•kg-1, content of Cu is 16.84-56.06 mg•kg-1, content of Pb is 9.72-19.93mg•kg-1, content of Cd is 0.32-1.05 mg•kg-1, and content of Cr is 27.35-57.95 mg•kg-1. Sediments have varying growth inhibitions or stimulatory effects on higher plants, and acute lethal effect on earthworms. Root elongation inhibition ratio of seed germination is -9.52 %～19.05 %, 14 d maximum mortality of earthworms is 55 %. In general, the long term water pollution has led to accumulation of river sediments and strong eco-toxicity, and farm-oriented channel dredging sediments have toxic hazards on soil – plant ecosystem.

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Periodical:

Advanced Materials Research (Volumes 610-613)

Pages:

634-641

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.610-613.634

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Online since:

December 2012

Authors:

Lei Chao, Su Chen, Xian Ming Lang, Cheng Hu

Keywords:

Earthworm, Eco-Toxicity, Higher Plants, Polluted River, Sediment

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