Research Article
Hexavalent Chromium Removal from Model Water and Car Shock Absorber Factory Effluent by Nanofiltration and Reverse Osmosis Membrane
Table 2
Transport parameters (
and
), diffusive flux
and
of hexavalent chromium in presence of different salts (
= 50 mg
,
= 50%, pH = 8, and
θ = 25°C).
| | | C (mol L−1) | (L h−1 m−2) | SD (%) | (mg L−1) | SD (%) | | SD (%) | | SD (%) |
| KCl | NF-HL | 0 | 5.09 | 0.17 | 4.195 | 0.095 | 0.916 | 0.04 | 0.7102 | 1.06 | 0.001 | 24 | 0.30 | 4.889 | 0.094 | 0.903 | 0.017 | 1.4879 | 3.68 | 0.01 | 28.17 | 0.06 | 5.088 | 0.01 | 0.901 | 6 10−5 | 1.6384 | 2.65 | 0.1 | 27.14 | 0.21 | 6.884 | 0.1 | 0.865 | 5 10−6 | 1.7517 | 4.75 |
| KCl | RO-SG | 0 | 5.33 | 0.07 | 0.398 | 0.092 | 0.993 | 0.0095 | 0.168 | 0.06 | 0.001 | 7.82 | 0.15 | 0.716 | 0.035 | 0.987 | 0.049 | 0.269 | 0.04 | 0.01 | 7.80 | 0.01 | 0.801 | 0.01 | 0.985 | 0.1 | 0.267 | 1.09 | 0.1 | 20.40 | 0.04 | 1.543 | 10−4 | 0.976 | 0.152 | 0.545 | 0.09 |
| KNO3 | NF-HL | 0 | 5.09 | 0.09 | 4.195 | 0.004 | 0.916 | 0.38 | 0.7102 | 0.003 | 0.001 | 11.97 | 0.02 | 5.715 | 0.0014 | 0.886 | 0.01 | 1.0366 | 0.09 | 0.01 | 24.91 | 0.18 | 5.963 | 0.098 | 0.885 | 0.03 | 1.5274 | 1.63 | 0.1 | 47.17 | 0.08 | 8.081 | 0.02 | 0.848 | 0.1 | 2.5262 | 0.08 |
| KNO3 | RO-SG | 0 | 5.33 | 0.07 | 0.398 | 0.0003 | 0.993 | 0.03 | 0.168 | 0.007 | 0.001 | 6.43 | 0.09 | 0.402 | 0.0007 | 0.992 | 0.04 | 0.184 | 0.0034 | 0.01 | 8.43 | 0.04 | 0.509 | 0.0004 | 0.990 | 0.08 | 0.249 | 0.002 | 0.1 | 12.52 | 0.03 | 1.739 | 0.0013 | 0.968 | 0.01 | 0.388 | 0.09 |
| K2SO4 | NF-HL | 0 | 5.09 | 0.08 | 4.195 | 0.015 | 0.916 | 4 10−3 | 0.7102 | 0.008 | 0.001 | 12.80 | 0.10 | 6.971 | 0.1 | 0.869 | 0.25 | 1.2333 | 0.001 | 0.01 | 32.157 | 0.01 | 6.801 | 0.001 | 0.871 | 0.145 | 1.8242 | 0.001 | 0.1 | 116.83 | 0.18 | 7.780 | 0.005 | nd | nd | nd | nd |
| K2SO4 | RO-SG | 0 | 5.33 | 0.11 | 0.398 | 0.00023 | 0.993 | 0.049 | 0.168 | 1.78 | 0.001 | 9.82 | 0.1 | 0.700 | 10−4 | 0.986 | 0.01 | 0.314 | 1.02 | 0.01 | 8.24 | 0.2 | 0.884 | 0.0005 | 0.982 | 0.07 | 0.293 | 0.008 | 0.1 | 21.77 | 0.2 | 2.746 | 1.14 10−5 | 0.957 | 0.23 | 0.652 | 0.09 |
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