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

Table 1

Specifications of NF-HL-2514 and RO-SG-2514 membranes.

Membrane reference	NF-HL-2514	RO-SG-2514
Membrane type	Polyamide thin film composite	Polyamide thin film composite
Maximum operating temperature	50°C	50°C
Maximum operating pressure	40 bar	41 bar
Continuous operating pH range	4–11	2–11
Membrane area	0.6 m^2	0.6 m^2
Pure water permeability	9 L h^−1 m^−2 bar^−1	3.85 L h^−1 m^−2 bar^−1
MWCO	314 Da	172 Da