Synthesis of eco-friendly ZnO-based heterophotocatalysts with enhanced properties under visible light in the degradation of organic pollutants

Environmental Systems Research

Table 8 Removal efficiency of PAHs in contact time

Water sources	Removal efficiency (%) MO/GS/A/ZnO/Ag						Removal efficiency (%) ZnO/Ag
Water sources	20 min Dark	40 min Dark	60 min Dark	20 min Solar	40 min Solar	60 min Solar	20 min Dark	40 min Dark	60 min Dark	20 min Solar	40 min Solar	60 min Solar
Acidic mine drainage	9.86	10.43	11.78	68.91	69.05	69.59	1.99	2.06	2.11	52.05	52.06	52.62
Alkaline mine drainage	3.19	4.61	5.66	51.14	52.84	61.07	2.17	2.36	3.74	23.25	36.38	37.96
Sewage wastewater	4.20	4.60	15.55	52.84	54.11	61.68	2.85	3.33	3.75	25.71	39.50	44.30