Phosphonates are an important group of phosphorus-containing compounds due to their increasing industrial use and possible eutrophication potential. This study involves investigations into the methods UV/FeII, Fenton and UV/Fenton for their removal from a pure water matrix and industrial wastewaters. It could be shown that the degradability of phosphonates by UV/FeII (6 kWh/m3) in pure water crucially depended on the pH and was higher the less phosphonate groups a phosphonate contains. The UV/FeII method is recommended in particular for the treatment of concentrates with nitrogen-free phosphonates, only little turbidity and a low content of organic compounds. Using Fenton reagent, the degradation of polyphosphonates was relatively weak in a pure water matrix (<20% transformation to o-PO43-). By means of the Photo-Fenton method (6 kWh/m3), those phosphonates with the smallest numbers of phosphonate groups were easier degraded as well at pH 3.5 in a pure water matrix (o-PO43- formation rates of up to 80%). Despite an incomplete transformation of organically bound phosphorus to o-PO43- with Fenton reagent in an organically highly polluted wastewater (max. 15%), an almost total removal of the total P occurred. The most efficient total P elimination rates were achieved in accordance with the following Fenton implementation: reaction → sludge separation (acidic) → neutralization of the supernatant → sludge separation (neutral). Accordingly, a neutralization directly after the reaction phase led to a lower total P removal extent.
%0 Journal Article
%1 rott2017removal
%A Rott, Eduard
%A Minke, Ralf
%A Bali, Ulusoy
%A Steinmetz, Heidrun
%D 2017
%I Elsevier
%J Water research
%K sent ubs_10002 ubs_20002 ubs_30026 ubs_40034 unibibliografie
%P 345-354
%R 10.1016/j.watres.2017.06.009
%T Removal of phosphonates from industrial wastewater with UV/feII, fenton and UV/fenton treatment
%V 122
%X Phosphonates are an important group of phosphorus-containing compounds due to their increasing industrial use and possible eutrophication potential. This study involves investigations into the methods UV/FeII, Fenton and UV/Fenton for their removal from a pure water matrix and industrial wastewaters. It could be shown that the degradability of phosphonates by UV/FeII (6 kWh/m3) in pure water crucially depended on the pH and was higher the less phosphonate groups a phosphonate contains. The UV/FeII method is recommended in particular for the treatment of concentrates with nitrogen-free phosphonates, only little turbidity and a low content of organic compounds. Using Fenton reagent, the degradation of polyphosphonates was relatively weak in a pure water matrix (<20% transformation to o-PO43-). By means of the Photo-Fenton method (6 kWh/m3), those phosphonates with the smallest numbers of phosphonate groups were easier degraded as well at pH 3.5 in a pure water matrix (o-PO43- formation rates of up to 80%). Despite an incomplete transformation of organically bound phosphorus to o-PO43- with Fenton reagent in an organically highly polluted wastewater (max. 15%), an almost total removal of the total P occurred. The most efficient total P elimination rates were achieved in accordance with the following Fenton implementation: reaction → sludge separation (acidic) → neutralization of the supernatant → sludge separation (neutral). Accordingly, a neutralization directly after the reaction phase led to a lower total P removal extent.
@article{rott2017removal,
abstract = {Phosphonates are an important group of phosphorus-containing compounds due to their increasing industrial use and possible eutrophication potential. This study involves investigations into the methods UV/FeII, Fenton and UV/Fenton for their removal from a pure water matrix and industrial wastewaters. It could be shown that the degradability of phosphonates by UV/FeII (6 kWh/m3) in pure water crucially depended on the pH and was higher the less phosphonate groups a phosphonate contains. The UV/FeII method is recommended in particular for the treatment of concentrates with nitrogen-free phosphonates, only little turbidity and a low content of organic compounds. Using Fenton reagent, the degradation of polyphosphonates was relatively weak in a pure water matrix (<20% transformation to o-PO43-). By means of the Photo-Fenton method (6 kWh/m3), those phosphonates with the smallest numbers of phosphonate groups were easier degraded as well at pH 3.5 in a pure water matrix (o-PO43- formation rates of up to 80%). Despite an incomplete transformation of organically bound phosphorus to o-PO43- with Fenton reagent in an organically highly polluted wastewater (max. 15%), an almost total removal of the total P occurred. The most efficient total P elimination rates were achieved in accordance with the following Fenton implementation: reaction → sludge separation (acidic) → neutralization of the supernatant → sludge separation (neutral). Accordingly, a neutralization directly after the reaction phase led to a lower total P removal extent.},
added-at = {2020-08-11T11:18:54.000+0200},
author = {Rott, Eduard and Minke, Ralf and Bali, Ulusoy and Steinmetz, Heidrun},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2da9925808b291586031c50ebaa63a413/unibiblio},
doi = {10.1016/j.watres.2017.06.009},
interhash = {183d8322f81979dcd8ba404348905174},
intrahash = {da9925808b291586031c50ebaa63a413},
issn = {{0043-1354} and {1879-2448}},
journal = {Water research},
keywords = {sent ubs_10002 ubs_20002 ubs_30026 ubs_40034 unibibliografie},
language = {eng},
pages = {345-354},
publisher = {Elsevier},
timestamp = {2020-08-11T09:18:54.000+0200},
title = {Removal of phosphonates from industrial wastewater with UV/feII, fenton and UV/fenton treatment},
volume = 122,
year = 2017
}