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利用混凝烧杯试验法,考察聚硫酸铁(PFS)强化混凝去除五价锑(Sb(V))过程中不同混凝条件对絮体形态(包括粒度和结构)以及出水水质的影响。结果表明,絮体平均粒径和分形维数的变化主要取决于主导混凝机理,且能通过作用于混凝效果而影响沉后水中悬浮态Sb(V)含量,但对最终除Sb(V)效果(主要为溶解态)的影响极为有限;原水p H和PFS投量对Sb(V)的去除有重要影响,而温度和混凝搅拌强度的作用却较小,并且助凝剂PAM的投加会在一定程度上削弱去除效果。在实际运行中,还需尽量避免沉后水因微小絮体过多影响后续工艺的运行工况及出水水质等。
The effect of different coagulation conditions on floc morphology (including particle size and structure) and effluent quality was investigated by coagulation beaker test in the process of stripping coagulation of pentavalent antimony (Sb (V)) by polyferric sulfate (PFS). The results show that the change of floc size and fractal dimension mainly depend on the dominant coagulation mechanism, and can influence the content of suspended state Sb (V) ) Effect (mainly dissolved) has a very limited impact on the removal of Sb (V) from raw water p H and PFS, while the effect of temperature and coagulation agitation intensity is small, and the coagulant PAM Dosing will weaken the removal effect to a certain extent. In the actual operation, but also need to avoid after-sinking water due to too little impact on the follow-up process of floc excessive working conditions and effluent quality.