Back to Search
Start Over
Ionic exchange desorption of mercury from contaminated dredging sludge (at 393K and ambient temperature).
- Source :
-
Soil & Sediment Contamination . 2019, Vol. 28 Issue 1, p122-133. 12p. - Publication Year :
- 2019
-
Abstract
- In this work, we reported results obtained during experimental tests to introduce a new approach to the treatment of dredging sludge polluted by mercury. A slurry of dredging sludge was treated by cationic exchange procedures both at ambient temperature and distilled at 393K with the aid of some different exchange salts: three inorganic (NaCl, CaCl2, and CaI2) and two organic Tetrabutylammonium chloride [(C4H9)4NCl] and Ethyl Viologen diiodide (1,1′-Dietil-4,4′-bipyridinium diiodide) [C14H18I2N2], having different cationic exchangeable part and different molecular weights. A similar (15% w/w) solution was used to treat mercury-polluted sludge considering 2, 24, and 48 h of reaction time. The removal efficiencies of the inorganic/low molecular weight monovalent salts were minimal at the tested temperatures, while higher removal was reached when CaI2 and Viol-I2 were used at ambient temperature with maximum treatment efficiencies over 70% in 48 h treatment. A recovery/reuse of the exchanging solutions was also tested finding good recovery potential of the salt slurry. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15320383
- Volume :
- 28
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Soil & Sediment Contamination
- Publication Type :
- Academic Journal
- Accession number :
- 133640914
- Full Text :
- https://doi.org/10.1080/15320383.2018.1551326