Hexavalent Chromium Removal from Model Water and Car Shock Absorber Factory Effluent by Nanofiltration and Reverse Osmosis Membrane

Table 4

Water quality of car shock absorber factory before and after neutralization and comparison with Tunisian standards liquid discharges into the network “National Office for Sanitation” (ONAS) (NT 106-02).

	Wastewater; before neutralization	Wastewater; after neutralization	Tunisian standards; (NT 106-02)
T (°C)	24	24	<35
pH	13.45	8	—
Conductivité (µS cm^−1)	3023	3027	—
TDS (mg L^−1)	2293	2296	—
Turbidité (NTU)	2.08	0	—
Cr(VI) (mg L^−1)	11.06	11.06	0.5