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1338680 
Journal Article 
Arsenic, chromium and mercury removal using mussel shell ash or a sludge/ashes waste mixture 
Seco-Reigosa, N; Peña-Rodríguez, S; Nóvoa-Muñoz, JC; Arias-Estévez, M; Fernández-Sanjurjo, MJ; Álvarez-Rodríguez, E; Núñez-Delgado, A 
In Press 
Yes 
Environmental Science and Pollution Research
ISSN: 0944-1344
EISSN: 1614-7499 
20 
2670-2678 
English 
Different batches of valued mussel shell and waste mussel shell ash are characterised. Shell ash has pH > 12 and high electrical conductivities (between 16.01 and 27.27 dS m(-1)), while calcined shell shows pH values up to 10.7 and electrical conductivities between 1.19 and 3.55 dS m(-1). X-ray fluorescence, nitric acid digestion and water extractions show higher concentrations in shell ash for most parameters. Calcite is the dominant crystalline compound in this ash (95.6 %), followed by aragonite. Adsorption/desorption trials were performed for mussel shell ash and for a waste mixture including shell ash, sewage sludge and wood ash, showing the following percentage adsorptions: Hg(II) >94 %, As(V) >96 % and Cr(VI) between 11 and 30 % for shell ash; Hg(II) >98 %, As(V) >88 % and Cr(VI) between 30 and 88 % for the waste mixture. Hg and As desorption was <5 % for both shell ash and the waste mixture, while Cr desorption was between 92 and 45 % for shell ash, and between 19 and 0 % for the mixture. In view of that, mussel shell ash and the mixture including shell ash, sewage sludge and wood ash could be useful for Hg(II) and As(V) removal. 
Ash from shell calcination; Calcined mussel shell; Heavy metals adsorption; Sewage sludge; Waste recycling; Waste mixture; Wood ash 
IRIS
• Arsenic Hazard ID
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     2. Lit Search Updates through Oct 2015
          PubMed
          WOS
          ToxNet
          Considered
     4. Considered through Oct 2015
     6. Cluster Filter through Oct 2015
     7. Other Studies through Oct 2015
          Other
• Arsenic (Inorganic)
     1. Literature
          PubMed
          Lit search updates through Oct 2015
     3. Hazard ID Screening
          Other potentially supporting studies
• Chromium VI
     Considered Studies
          Electronic Search
     Excluded
          Other Not Pertinent
     Lit Search Updates
          Jan to June 2013