粉末活性炭对内吸磷的吸附性能研究

Adsorption of demeton from water by powdered activated carbon

研究了粉末活性炭对内吸磷的吸附去除效果以及吸附时间、活性炭投加量和水质条件对吸附效果的影响。结果表明,当内吸磷质量浓度为0.30 mg/L,活性炭投加量为20 mg/L时,在去离子水中吸附60 m in后,出水内吸磷为0.02 mg/L;在去离子水中的吸附效果优于原水,在实际应用中需根据原水水质适当调整活性炭投加量或吸附时间;吸附过程符合Freundlich方程,在实际应用中应先进行吸附容量试验,再估算活性炭的投加量。

The adsorption removal efficiency of demeton which was affected by adsorption time, powdered activated carbon （PAC） dosage and water quality conditions by PAC was investigated. The results indicated that the effluent demeton was 0.02 mg/L when the demeton concentration was 0.30 mg/L, the PAC dosage was 20 mg/L with an adsorption time of 60 rain in the deionized water. The adsorption effect in deionized water was superior to the raw water, and the PAC dosage and adsorption time should be suitably adjusted according to the raw water quality in practical application. The adsorption process fitted the Freundlich equation, and the adsorption capacity test should be conducted in the practical application, then the PAC dosage was estimated.