Use of Nanostructured Layered Double Hydroxides as Nanofilters in the Removal of Fe²⁺ and Ca²⁺ Ions from Oil Wells

Table 2

Results of the adsorption study of Ca²⁺.

LDHs	Actual amount, (ppm)	Eluded amount, (ppm)	Absorbed amount, (ppm)	Degree of surface coverage, θ	Distribution partition coefficient,	Absorption efficiency (%)
1	7.7780	0.7165	7.7064	0.99	1.01	99.08
2	7.7780	0.7563	7.0217	0.90	1.11	90.28
3	7.7780	0.7937	6.9843	0.90	1.11	89.80
4	7.7780	1.2238	6.5542	0.84	1.19	84.27