Table 6. The treatment efficiency of colorants present in rush mat dyeing wastewater by the 5-CuH500 material^a.

Time (min)	The treatment efficiency of dyes in wastewater by the 5-CuH500 material (%)
	pH = 2.5		pH = 3.0		pH = 3.5		pH = 4.07 (initial)
	Abs	H%	Abs	H%	Abs	H%	Abs	H%
0	1.715	0.0	1.715	0.0	1.715	0.0	1.715	0.0
150 ad	1.707	0.5	1.676	2.3	1.318	23.1	0.851	50.4
180	0.614	64.2	0.724	57.8	0.682	60.2	0.503	70.7
210	0.577	66.4	0.66	61.5	0.614	64.2	0.438	74.5
270	0.504	70.6	0.608	64.5	0.492	71.3	0.099	94.2
330	0.164	90.4	0.346	79.8	0.079	95.4	0.055	96.8
390	0.0321	98.1	0.0301	98.2	0.0166	99.0	0.0279	98.4
450	0.0207	98.8	0.0453	97.4	0.0232	98.6	0.0492	97.1
510	0.0076	99.6	0.0111	99.4	0.0126	99.3	0.0197	98.9

^aad: adsorption; pH (initial): pH value of the original (untreated) dye wastewater.