Heavy metal adsorption on iron oxide and iron oxide-coated silica ...
Heavy metal adsorption on iron oxide and iron oxide-coated silica ...
Heavy metal adsorption on iron oxide and iron oxide-coated silica ...
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APPENDIX FGOETHITE COATING RESULTSResults for the goethite coating processes are presented below. Abrasi<strong>on</strong> was c<strong>on</strong>ductedby shaking <strong>coated</strong> <strong>silica</strong> (Re > 104) in DI for 4 hours. Samples 1 through 9 are based <strong>on</strong>the <str<strong>on</strong>g>adsorpti<strong>on</strong></str<strong>on</strong>g> coating method <strong>and</strong> 10 through 18 the precipitati<strong>on</strong> method.Table F.1 Ir<strong>on</strong> C<strong>on</strong>centrati<strong>on</strong> of the Coated Silica Before <strong>and</strong> After Abrasi<strong>on</strong>SampleFe c<strong>on</strong>centrati<strong>on</strong> beforeabrasi<strong>on</strong> (mg Fe g -1 )Fe c<strong>on</strong>centrati<strong>on</strong> afterabrasi<strong>on</strong> (mg Fe g -1 )Fetot Feam Fecry Fetot Feam Fecry1 6.58 0.56 6.03 5.46 0.14 5.322 2.43 0.30 2.13 1.83 0.05 1.783 1.42 0.31 1.11 0.87 0.03 0.844 25.75 1.82 23.93 21.36 0.25 21.125 2.17 0.57 1.60 1.17 0.05 1.126 2.56 0.52 2.04 1.09 0.03 1.067 4.46 1.06 3.40 1.99 0.10 1.908 4.62 0.78 3.84 2.84 0.06 2.779 1.77 0.55 1.22 0.59 0.03 0.5610 7.41 7.27 0.14 4.13 4.17 0.0011 3.93 0.72 3.21 1.47 0.17 1.3012 3.84 0.49 3.35 0.67 0.10 0.5713 20.39 10.06 10.33 8.50 5.85 2.6514 5.71 1.13 4.58 1.64 0.48 1.1615 2.30 0.81 1.49 0.88 0.19 0.6916 7.79 3.94 3.85 6.23 3.69 2.5417 2.39 0.99 1.40 1.14 0.19 0.9518 4.70 0.72 3.98 1.58 0.18 1.40177
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