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PCDD/Fs profile and risk assessment in water and sediments around a non-wood pulp and paper mill when a chlorine bleaching treatment is applied

Desalination and Water Treatment, ISSN: 1944-3986, Vol: 129, Page: 319-324
2018
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Article Description

Non-wood pulp and paper mills (PMs) with chlorine bleaching, which was identified as a primary pollution source of polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) in water environment, are still widely distributed around important rivers and lakes. The composition profiles and risk assessment of PCDD/Fs in water and sediments around a non-wood PM, in which a chlorine bleaching treatment is applied, were evaluated. PCDD/Fs concentrations in downstream water and sediments were 0.44 and 1.10 × 10 3 pg TEQ kg –1, respectively, which were noticeably higher than these in upstream water and sediments. It is, therefore, important to take into account the cumulative effect of pollution by these effluent emissions from non-wood PMs. PCDD/Fs analysis provided further information about PCDD/Fs contamination from non-wood PMs. The environmental risk for fish in water and sediment was low, while for mammalian wildlife in water environment was high, with the risk quotient values higher than 7.00.

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