ORCID Profile
0000-0003-3407-5011
Current Organisations
Christian-Albrechts-Universität zu Kiel
,
Universität Duisburg-Essen
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Publisher: IOP Publishing
Date: 08-02-2012
Publisher: Trans Tech Publications, Ltd.
Date: 07-10-2011
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.356-360.537
Abstract: The use of surface oxidized covellite (CuS), namely mixed phase copper sulphide (CuS and CuSO 4 ) was studied for the removal of mercury from aqueous solution under the effect of various reaction parameters (pH, time, Hg(II) concentration). From batch sorption studies, the equilibrium data revealed that the sorption behaviour of Hg(II) onto mixed phase copper sulphide follows well with Langmuir isotherm and the maximum sorption capacity (Q max ) determined ≈ 400mg Hg(II) /g of sorbent. Meanwhile, all the unreacted and reacted mixed phase copper sulphides were also characterized by Powder XRD, SEM and XPS techniques. The results indicated that the sorption of Hg(II) onto mixed phase copper sulphide occurs initially through the dissolution of surface oxidized CuSO 4 layer. After that, the surface complexation product formed and sorbed onto the surface of CuS. These outcomes suggest the potential ability of CuS in removing Hg(II) even if the CuS layer is being surrounded by oxidized layer of CuSO 4 .
Publisher: Wiley
Date: 06-09-2019
DOI: 10.1002/AIC.16748
Publisher: Wiley
Date: 10-04-2013
Publisher: Trans Tech Publications, Ltd.
Date: 10-2011
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.361-363.1445
Abstract: The deactivation and destabilization of copper sulfide when exposed to an oxidizing environment has led to the economical concerns as this sulfidic material can be easily destroyed by a series of oxidation processes. A promising and effective remediation technique in limiting the contact between covellite (CuS) and oxygen has been developed using a simple, hassle-free, non-corrosive, and eco-friendly pre-treatment of nitrogen approach. This remediation technique is remarkably effective as various techniques such as powder XRD, EDX, elemental mapping, and TGA-MS analyses have confirmed that covellite prepared with the pre-treatment of nitrogen does not oxidize to any mixed phase compound. Meanwhile, the study also shows that covellite stored without the pre-treatment of nitrogen has transformed to a mixed phase of pentahydrate copper sulfate and covellite. Hence, this method can be practically exercised not only on covellite, but possibly on other metal sulfides which are prone to be attacked by oxygen and water molecules in oxidizing environment.
Publisher: Elsevier BV
Date: 05-2012
No related grants have been discovered for Malte Behrens.