Abstract
The removal of oil pollutants from water and purifying process of oil-polluted water are studied through catalytic degradation method with nano-MgO. The results indicated that catalytic degradation effect of nano-MgO on the oil pollutants was associated with dosage of nano-MgO, pH and water temperature. When oil content was 1.8 mg/L, 0.17 g nano-MgO was used and the removal rate of oil was 93.92%. Furthermore, nano-Mgo was a non-photosensitive catalyst. GC/MS analysis showed that the amount of petroleum-based pollutants in water was reduced 73.77% from the previous 61 kinds to 16 kinds, and the total peak area was reduced 96.05% after catalytic degradation of nano-MgO. Therefore, nano-MgO has an excellent effect on the catalytic degradation of oil pollutants and can be applied in the treatment of oil wastewaters.
Highlights
Micro-polluted water refers to that water whose physical, chemical and microbial properties can’t meet the demands of water quality as a source of drinking water
The results indicated that catalytic degradation effect of nano-MgO on the oil pollutants was associated with dosage of nano-MgO, pH and water temperature
Oil is comprised of hundreds of organics, mainly including alkanes, aromatic hydrocarbons and cyclones, which account for 50% - 90% of the total oil content, and the rest are non-hydrocarbon oxygenates, sulfur or nitrogenous nitrogenous compounds [2]
Summary
Micro-polluted water refers to that water whose physical, chemical and microbial properties can’t meet the demands of water quality as a source of drinking water. Pollutants in the micro-polluted water are often regarded as trace organics, including natural organic matter (NOM) and synthetic organic compound (SOC). The oil pollutants are considered to have adverse effects on human body and natural environment because of their high mutagenic activity, whereas nanomaterials have excellent properties of adsorption and catalytic degradation of the organic pollutants in the water, due to the small particle size, high specific surface area, high surface activity, a great numbers of surface defects and surface ions, etc [3,4,5,6]. Self-made nano-MgO was used as the catalyst for the treatment of oil pollutants in micro-polluted water to investigate the catalytic degradation and contributing factors off nano-MgO
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