Degradation of polychlorinated biphenyls in aqueous solutions after UV-peroxide treatment: Focus on toxicity of effluent to primary producers

College

Gokongwei College of Engineering

Department/Unit

Chemical Engineering

Document Type

Article

Source Title

Ecotoxicology and Environmental Safety

Volume

74

Issue

6

First Page

1607

Last Page

1614

Publication Date

9-1-2011

Abstract

The combination of UV irradiation and hydrogen peroxide (UV-H2O2) was shown to be effective in treating water spiked with 2,2',4,4',5,5'-hexachlorobipheny (PCB 153), reducing its concentration by as much as 98%. To test the toxicity of the effluent, bioassays involving three species of primary producers were performed. Results showed the effluent exerting an adverse effect on the algae Scenedesmus bijugatus and the duckweed Lemna paucicostata. On the other hand, exposure of the mungbean Vigna radiata to the effluent revealed mostly no statistically significant adverse effect or growth stimulation. This suggested that on an exposure period of 96h, higher forms of chlorophyll-bearing species such as plants are relatively unaffected by trace concentrations of PCBs and degradation products, while less differentiated species like algae and duckweeds are vulnerable. © 2011 Elsevier Inc.

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Digitial Object Identifier (DOI)

10.1016/j.ecoenv.2011.04.018

Disciplines

Chemical Engineering

Keywords

Hydrogen peroxide; Whole effluent toxicity testing; Water—Pollution

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