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Clean Technologies and Environmental Policy

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01.12.2014 | Original paper

Surface chemistry modifications of rice husk toward enhancement of Hg(II) adsorption from aqueous solution

verfasst von: Shiow-Tien Song, Norasikin Saman, Khairiraihanna Johari, Hanapi Mat

Erschienen in: Clean Technologies and Environmental Policy | Ausgabe 8/2014

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Abstract

The modified rice husks were characterized in terms of morphology (scanning electron microscopy), functional groups (Fourier transform infrared spectroscopy), surface charge (pH_pzc), and elemental composition which indicate the treatments that led to significant changes to its surface chemistry. Batch adsorption studies showed that the highest adsorption capacity of Hg(II) was 89 and 118 mg/g obtained by sulfur-functionalized rice husk (RH-CS) and organosilane-grafted rice husk (RH-GM), respectively. The reusability of raw rice husk (RH-Raw) and alkali-treated rice husk (RH-NaOH) was superior to RH-CS and RH-GM; even though their adsorption capacities were slightly lower. However, their selectivity was comparable to that of the RH-CS and RH-GM. In addition, the results demonstrated the potential application of rice husk-based adsorbents for treating Hg(II) containing wastewaters such as produced water from oil and gas exploration activities.

Vorheriger Artikel A canonical correlation analysis of the relationship between sustainability and competitiveness

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Titel: Surface chemistry modifications of rice husk toward enhancement of Hg(II) adsorption from aqueous solution
verfasst von: Shiow-Tien Song
Norasikin Saman
Khairiraihanna Johari
Hanapi Mat
Publikationsdatum: 01.12.2014
Verlag: Springer Berlin Heidelberg
Erschienen in: Clean Technologies and Environmental Policy / Ausgabe 8/2014
Print ISSN: 1618-954X
Elektronische ISSN: 1618-9558
DOI: https://doi.org/10.1007/s10098-014-0803-y

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