Abstract
This paper analyses the treatment effect of the “coagulation-sedimentation-O3-biological sand filtration-GAC” combined process on phthalic acid esters in secondary effluent of municipal wastewater treatment plant and meanwhile evaluate its health risk. The results indicated that when the concentrations of DBP and DiOP in secondary effluent were at range of 0.41 mg/L–0.814 mg/L and 0.23 mg/L–0.36 mg/L, the average total removal rates of DBP and DiOP were 85.10% and 68.11%, and the average concentration of DBP and DiOP in effluent were 0.089 mg/L and 0.091 mg/L, respectively. The quality of the effluent met the requirement of the ornamental scenic environment water in The Quality of Urban Wastewater Recycling and Scenic Environment Water (GB/T 18921-2002), and the health risks of DBP and DiOP in effluent were at range of 1.99 × 10−12 –2.15 × 10−12/a and 1.48 × 10−11 –1.85 × 10−11/a, respectively, which is lower than the acceptable maximum risk level: 1.0 × 10−6.
Highlights
With the development of reclaimed water returning to agricultural irrigation, industrial cooling, urban landscape, and so forth, people increasingly are concerned about PAEs’ impact on human health [1]
This paper studies adsorption and removal effect of the “coagulation-sedimentation-O3-biological sand filtration-GAC” combined process on phthalic acid esters in secondary effluent from municipal wastewater treatment plant and evaluates the risk of effluent returning to landscape water on human health
The recycling of municipal wastewater treatment plant’s secondary effluent is a better way to alleviate the shortage of water resources
Summary
With the development of reclaimed water returning to agricultural irrigation, industrial cooling, urban landscape, and so forth, people increasingly are concerned about PAEs’ impact on human health [1]. PAEs are a kind of endocrine disrupting chemicals which exists in environment; it is toxic and can enter into human body, strengthen the possibility of damaging the human chromosome, and block the normal growth of human and animal and regeneration of white blood cells of human [5, 6]. It can cause cancer, teratogenesis, and mutagenicity [7, 8]. For this reason, it is vital to research on the removal of phthalic acid esters in reclaimed water and analyse its health risk. This paper studies adsorption and removal effect of the “coagulation-sedimentation-O3-biological sand filtration-GAC” combined process on phthalic acid esters in secondary effluent from municipal wastewater treatment plant and evaluates the risk of effluent returning to landscape water on human health
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