Experimental Study on Lead-Containing Waste Water Treatment by Modified Fly Ash
Abstract: According to the phenomenon of lead exceeds the standard in the environmental water body, acid modified fly ash was used as adsorbent material for purifying waste water containing lead. Effect factors such as particle size, adsorption time, adsorption temperature and pH value on the removal rate of lead were investigated by using a single factor method and orthogonal test method. The magnitude order of the effect of various factors on the removal of lead by fly ash was particle size of fly ash > adsorption temperature = pH value > adsorption time. Under the condition that the fly ash particle size is 200 meshes, the adsorption temperature is 30˚C, the adsorption time is 2 hours, and the pH value is 6, the removal rate of lead in waste water was 98.40%. The concentration of Pb2+ after treatment was lower than that of 0.80 mg/L, and reached the requirement of GB 8978-2002 “waste water comprehensive discharge standard”. The adsorption model of Pb2+ with modified fly ash was in accordance with the Langmuir adsorption model.
文章引用: 秦樊鑫 , 杨 昱 (2016) 改性粉煤灰处理含铅废水的试验研究。 环境保护前沿， 6， 47-53. doi: 10.12677/AEP.2016.64007
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