Table 1.

Pseudo second-order kinetic parameters for Cr(VI) removal from two wastewaters by BFe⁰NPs (4%) at different pH values.

pH	Simulated Wastewater				Leachate Wastewater
	qe,exp/mg·g−1	qe,cal/mg·g−1	k/g (mg·min)−1	R 2	qe,exp/mg·g−1	qe,cal/mg·g−1	k/g (mg·min)−1	R 2
2.0	6.65	6.65	1.45	1	5.80	5.79	0.30	1
2.5	6.45	6.60	0.01	0.9907	4.68	4.48	0.06	0.9961
3.0	2.14	2.51	0.04	0.9416	2.55	2.45	−0.07	0.9664