Evaluation of the efficiency of ceramic filters for water treatment in Kambata Tabaro zone, southern Ethiopia

Environmental Systems Research

Table 6 Iron removal efficiency and nitrite removal efficiency of the ceramic filters

Filter code	Concentration before filtration Fe⁺ and No₂⁻ (ppm)		Concentration after filtration Fe⁺ and No₂⁻ (ppm)		Percent removal efficiency (%)
Filter code	Fe⁺	No₂⁻	Fe⁺	No₂⁻	Fe⁺	No₂⁻
1	1.5	0.068	1.2	0.06	20	11.8
2	1.5	0.068	0.9	0.04	40	41.2
3	1.5	0.068	0.32	0.039	78.7	42.6
4	1.5	0.068	1.15	0.052	23.3	23.5
5	1.5	0.068	0.82	0.031	45.3	54.4
6	1.5	0.068	0.82	0.025	45.3	63.2
7	1.5	0.068	0.29	0.041	80.7	39.7
8	1.5	0.068	0.61	0.021	59.3	69.1
9	1.5	0.068	0.25	0.02	83.3	70.6