南京工业大学学报（自然科学版）2024，Vol.46Issue(3)：338-344,7.DOI:10.3969/j.issn.1671-7627.2024.03.011
化学-混凝沉淀法处理酸性高浓度含氟光伏废水
Treatment of acidic and highly concentrated fluorine-containing photovoltaic wastewater by chemical coagulation-precipitation method
石智如 1武海霞 1吴德勇 2方明龙1
作者信息
- 1. 南京工业大学城市建设学院,江苏 南京 211800
- 2. 信息产业电子第十一设计研究院科技工程股份有限公司南京分公司,江苏 南京 210012
- 折叠
摘要
Abstract
The effects of common calcium source precipitants on effluent pH and total dissolved solids(TDS)were investigated,and the optimal precipitant was identified.Based on this,the effect of chemical coagulation-precipitation method on the removal of high concentrations of F-from photovoltaic wastewater was studied.The results showed that the CaCO3 precipitant could not only effectively remove F-and reduce TDS,but also bring the pH of the treated wastewater close to neutral.FeCl3 required a lower coagulant dosage compared with polymerized aluminum chloride(PAC)and polymerized aluminum ferric chloride(PAFC).The addition of polyacrylamide(PAM)as a coagulant aid strengthened the coagulation effect and shortened the precipitation time.When the CaCO3 dosage was at 0.8 calcium-fluorine molar ratio,the mass concentration of F-reduced from 6 000 mg/L to 83 mg/L,and TDS from 9930 mg/L to 3 400 mg/L.The effluent pH of the chemically treated water after sedimentation reached 5.9.After adding 1.0 g/L FeCl3 coagulant,the F-concentration further reduced to 6.2 mg/L.Finally,with the addition of 14 mg/L PAM coagulant aid,the coagulation and precipitation time was shortened to 2 min.The F-concentration in the acidic high-concentration fluorine-containing photovoltaic wastewater treated by chemical coagulation and precipitation method met the direct discharge standards of Discharge Standard for Water Pollutants of Electronic Industry.The study provides a technical reference for the treatment of acidic high-concentration fluorine-containing photovoltaic wastewater and proposes a feasible treatment scheme for engineering applications.关键词
氟离子/光伏废水/化学沉淀/混凝沉淀/工艺参数/废水处理Key words
fluoride/photovoltaic wastewater/chemical precipitation/coagulation and precipitation/process parameters/wastewater treatment分类
资源环境引用本文复制引用
石智如,武海霞,吴德勇,方明龙..化学-混凝沉淀法处理酸性高浓度含氟光伏废水[J].南京工业大学学报（自然科学版）,2024,46(3):338-344,7.
