ORIGINAL PAPER
Desalination of Groundwater and Impoundments using Nano-Zero Valent Iron, n-Fe0
1 1 | DCA Consultants Ltd. |
CORRESPONDING AUTHOR
David Dorab Jamshed Antia
DCA Consultants Ltd., Haughend Farm, Bridge of Earn Road, PH2 9BX Dunning, United Kingdom
DCA Consultants Ltd., Haughend Farm, Bridge of Earn Road, PH2 9BX Dunning, United Kingdom
Publication date: 2015-06-29
Meteorology Hydrology and Water Management, 3(1),21–38
KEYWORDS
TOPICS
ABSTRACT
Salinization of groundwater is a major problem, particularly in areas with limited infrastructure. 14 diffusion reactors are operated diabatically at -8°C to 20°C to determine the amount of NaCl removed by n-Fe0. The reactors establish NaCl removal by Fe0: (i) 44,000-77,000 nm particle size (PS) = 0.0675-0.1925 g L-1 [feed water (FW) = 0.89 g L-1]; (ii) 50 nm PS = 0.953-1.14 g L-1 [FW = 1.095-1.19 g L-1]; (iii) 50 nm PS under nitrogen saturation (0.1- 0.2 MPa) = 9.693 g L-1 [FW = 10 g L-1]; (iv) <0.01 g 50 nm PS L-1 under nitrogen saturation (0.1-0.2 MPa) = 1.564 g L-1 [FW = 4 g L-1]; (v) 50 nm PS modified by nitrogen saturation (PSN) = 5.52 g L-1 [FW = 6.89 g L-1]. Desalination commences at a time, t, after the n-Fe0 is added to the water, and continues with an exponential decline until a base
(equilibrium) salinity is reached. The effectiveness of n-Fe0 as a desalination agent appears to increase with increased water salinity. Placement of PSN in an existing impoundment, or aquifer, may provide a cost effective, zero energy,