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Frank-Dieter Kopinke
Helmholtz Centre for Environmental Research - UFZ
CatalysisOrganic chemistryInorganic chemistryChemistryChromatography
171Publications
37H-index
3,985Citations
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Publications 174
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#1Maria Balda (Helmholtz Centre for Environmental Research - UFZ)H-Index: 1
#2Frank-Dieter Kopinke (Helmholtz Centre for Environmental Research - UFZ)H-Index: 37
Abstract Two different types of nanoscale zero-valent iron (nZVI) were synthesized according to the same standard procedure: reduction of dissolved Fe(II) with sodium borohydride – one starting from a commercial iron salt having pro analysi (p.a.) purity, and another from microscale iron with an extraordinary degree of purity, derived from the decomposition of iron pentacarbonyl. The ZVI samples exhibited similar hydrodechlorination activities towards hexachlorobenzene as an example for higher c...
1 CitationsSource
#1Sarah SühnholzH-Index: 2
#1Sarah SühnholzH-Index: 2
Last. Katrin MackenzieH-Index: 20
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Abstract FeS was evaluated as heterogeneous activator for peroxydisulfate (PS) with trichloroethene (TCE) chosen as model substance representing organic water pollutants prone to fast oxidation by sulfate radicals. The TCE degradation followed in most cases pseudo-first-order kinetics with a FeS-normalized maximum rate constant of k’TCE = 140 M-1min–1 (with cFeS,0 = 0.28mM and cPS,0 = 5mM). Sulfate radicals were determined as predominant radical species formed during PS activation by FeS by eval...
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#2Sarah SühnholzH-Index: 2
Last. Katrin MackenzieH-Index: 20
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Abstract Dechlorination of dichlorodiphenyltrichloroethane (DDT) as a model compound was performed with zero-valent iron (micro-ZVI and nano-ZVI) as reductant and carbonaceous adsorbents as sink and catalyst in water. DDT is rapidly converted to dichlorodiphenyldichloroethane (DDD) in direct contact with ZVI. However, up to 90% of the DDD is transformed into non-identified, most likely oligomeric products. There is no indication of dechlorination at the aromatic rings. DDT is still rapidly dechl...
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#1Frank-Dieter Kopinke (Helmholtz Centre for Environmental Research - UFZ)H-Index: 37
#2Hauke Harms (Helmholtz Centre for Environmental Research - UFZ)H-Index: 54
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#1Navid Saeidi (Helmholtz Centre for Environmental Research - UFZ)
#2Frank-Dieter Kopinke (Helmholtz Centre for Environmental Research - UFZ)H-Index: 37
Last. Anett Georgi (Helmholtz Centre for Environmental Research - UFZ)H-Index: 18
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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 ...
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#1Maria Vogel (Helmholtz Centre for Environmental Research - UFZ)H-Index: 1
#2Anett Georgi (Helmholtz Centre for Environmental Research - UFZ)H-Index: 18
Last. Katrin Mackenzie (Helmholtz Centre for Environmental Research - UFZ)H-Index: 20
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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...
1 CitationsSource
#1Frank Holzer (Helmholtz Centre for Environmental Research - UFZ)H-Index: 12
#2Frank-Dieter Kopinke (Helmholtz Centre for Environmental Research - UFZ)H-Index: 37
Last. Ulf Roland (Helmholtz Centre for Environmental Research - UFZ)H-Index: 13
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#1Maria Vogel (Helmholtz Centre for Environmental Research - UFZ)H-Index: 1
#2Frank-Dieter Kopinke (Helmholtz Centre for Environmental Research - UFZ)H-Index: 37
Last. Katrin Mackenzie (Helmholtz Centre for Environmental Research - UFZ)H-Index: 20
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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...
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#2Anett GeorgiH-Index: 18
Last. Kai-Uwe GossH-Index: 42
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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...
3 CitationsSource
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