混凝气浮处理酸性大红3R的实验研究
Experimental study on treatment of acid red 3R by coagulation and air-floatation
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摘要: 实验研究了pH值、七水硫酸镁用量、十二烷基硫酸钠用量和气浮时间对酸性大红3R混凝气浮处理的影响。对比了混凝气浮和混凝沉淀处理酸性大红3R的效果。结果表明，pH值的调节和混凝剂的投加对酸性大红3R混凝气浮的处理效果影响较大，浮选剂对气浮效率有一定提高，杂质可在较短时间内浮出，混凝气浮起到一定深度处理效果。当混凝剂用量为647 mg/L，浮选剂用量为2 mg/L，pH值为11，气浮时间为3 min时，吸光度和色度去除率分别达到87.7％和84.9%。紫外-可见光谱图显示在pH为13时苯环、萘环或杂环不饱和体系会吸收—OH助色基团。Abstract: The influences of pH,dosage of heptahydrate magnesium sulfate,dosage of sodium dodecyl sulfate and time of airfloatation on the treatment of acid red 3R by coagulation and airfloatation were studied.The effects of the treatment of acid red 3R by coagulationair floatation and coagulationsedimentation were compared.The results show that the adjustment of pH and the use of flocculant have more influence on the treatment of acid red 3R by coagulation and airfloatation,and the use of floatation agent can improve the removal efficiency, impurities can be floated in few airfloatation time,coagulation and airfloatation can be advanced treatment, when dosage of flocculant was 647 mg/L,dosage of floatation agent was 2 mg/L,pH was 11, air-floatation time was 3 min,the removal rates of chromaticity and absorbance can attain 87.7% and 84.9% respectively.UVVis spectrogram showed —OH can be adsorpted by the unsaturated systems of the benzene ring and naphthalene ring or heterocycle when pH is 13.
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Key words:
- acid red 3R /
- coagulation and air-floatation /
- removal rate
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