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Frank-Dieter Kopinke
Helmholtz Centre for Environmental Research - UFZ
170Publications
35H-index
3,725Citations
Publications 170
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#1Navid Saeidi (Helmholtz Centre for Environmental Research - UFZ)
#2Frank-Dieter Kopinke (Helmholtz Centre for Environmental Research - UFZ)H-Index: 35
Last.Anett Georgi (Helmholtz Centre for Environmental Research - UFZ)H-Index: 17
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Abstract The adsorption of perfluorooctanoic acid (PFOA) and perfluorooctylsulfonic acid (PFOS) on various activated carbon felts (ACFs) was studied and related to their surface characteristics. The adsorption isotherms of the ACFs studied differ widely in terms of adsorption affinities as well as maximum loadings. Cation and anion exchange capacities (CEC and AEC) at pH 7, as well as point of zero net proton charge (PZC), were identified as good indicators for understanding of each adsorbent’s ...
#1Frank Holzer (Helmholtz Centre for Environmental Research - UFZ)H-Index: 12
#2Frank-Dieter Kopinke (Helmholtz Centre for Environmental Research - UFZ)H-Index: 35
Last.Ulf Roland (Helmholtz Centre for Environmental Research - UFZ)H-Index: 12
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#1Maria Vogel (Helmholtz Centre for Environmental Research - UFZ)
#2Anett Georgi (Helmholtz Centre for Environmental Research - UFZ)H-Index: 17
Last.Katrin Mackenzie (Helmholtz Centre for Environmental Research - UFZ)H-Index: 19
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Abstract Nanoscale zero-valent iron (nZVI) is a powerful reductant for many water pollutants. The lifetime of nZVI in aqueous environments is one of its limitations. Sulfidation of the nZVI surface by reduced sulfur species is known to significantly modify the particle properties. In the present study we examined various post-synthesis sulfidation methods applied on Carbo-Iron, a composite material where iron nanostructures are embedded in colloidal activated carbon (AC) particles. In such cases...
#1Maria Vogel (Helmholtz Centre for Environmental Research - UFZ)
#2Frank-Dieter Kopinke (Helmholtz Centre for Environmental Research - UFZ)H-Index: 35
Last.Katrin Mackenzie (Helmholtz Centre for Environmental Research - UFZ)H-Index: 19
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Abstract Zero-valent iron (ZVI) is widely applied for reduction of chlorohydrocarbons in water. Since the dechlorination occurs at the iron surface, marked differences in rate constants are commonly found for nanoscale and microscale ZVI. It has already been shown for trichloroethene (TCE) adsorbed to activated carbon (AC) that the dechlorination reaction is shifted to the carbon surface simply by contacting the AC with highly reactive nanoscale ZVI particles. Transfer of reactive species to the...
Abstract Hydrothermal treatment (HT) at 200 °C and 240 °C for 4 and 16 h was studied for the regeneration of granular activated carbon (AC) loaded with a range of organic micropollutants having a broad range of physico-chemical properties. Carbamazepine, diazinon, diclofenac, estrone, iohexol, metoprolol and sulfamethoxazole were fully converted. Limits were seen for the conversion of caffeine, ibuprofen and perfluorooctanesulfonate (PFOS). However, the degree of degradation was enhanced for the...
#1Markus Kraus (Helmholtz Centre for Environmental Research - UFZ)H-Index: 5
#2Ulf Trommler (Helmholtz Centre for Environmental Research - UFZ)H-Index: 10
Last.Ulf Roland (Helmholtz Centre for Environmental Research - UFZ)H-Index: 12
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Abstract Decontamination of air or other gas streams loaded with low VOC concentrations is a prevalent task for adsorption using zeolites. Emphasizing the importance of adsorber selection, several zeolites varying in type, Si/Al ratio and provider were tested for toluene as representative organic target compound and water as adsorbate both in single and competing adsorption studies. In some cases, the toluene breakthrough is mainly caused by water-driven desorption. It was shown that for adsorpt...
#1Patrizia Stutzenstein (Helmholtz Centre for Environmental Research - UFZ)H-Index: 1
#2Barbara Weiner (Helmholtz Centre for Environmental Research - UFZ)H-Index: 10
Last.Frank-Dieter Kopinke (Helmholtz Centre for Environmental Research - UFZ)H-Index: 35
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Abstract Wet oxidation of a wastewater highly contaminated with biogenic organic compounds was investigated with nitrates as oxidant. Iron(III) nitrate proved to be a powerful oxidant at a relatively low treatment temperature of 120 °C. 50% of the chemical oxygen demand (COD) and 30% of the dissolved organic carbon (DOC) could be eliminated within the first hour of reaction. Iron(III) ions significantly support the nitrate based wet oxidation under mild reaction conditions. It may function as ca...
Abstract Surface functionality of nanodiamonds is of crucial importance for their desired chemical, optical and electromagnetic properties. Chlorinated surfaces are expected to enable an easy further modification of diamond surfaces via various substitution reactions for targeted molecule grafting, particularly interesting for biochemical applications. Previously reported chlorination approaches of diamonds required troublesome handling of hazardous chemicals, such as chlorine gas, and long chlo...
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