Considering that Fe,Al elements in bauxite residue are active components for water purification,an effective polyaluminum ferric chloride(PAFC)coagulant derived from bauxite residue,with Fe2O3 content>5.1%,Al2O3%&g...Considering that Fe,Al elements in bauxite residue are active components for water purification,an effective polyaluminum ferric chloride(PAFC)coagulant derived from bauxite residue,with Fe2O3 content>5.1%,Al2O3%>6.5%,basicity>65%,was successfully prepared.The effect of as-prepared PAFC on the zeta potential for printing and dyeing wastewater was investigated.Comparing with polyferric chloride(PFC)and polyferric sulfate(PFS)for printing and dyeing wastewater treatment,prepared bauxite residue-based PAFC exhibited the optimal performance in the aspects of chromaticity and chemical oxygen demand(COD)removal rate.Furthermore,the combination of bauxite residue-based PAFC and PFS for synergy coagulation of such wastewater demonstrated an obvious positive effect.With the proportion between as-prepared PAFC and PFS to be 2.5:1,the COD of treated wastewater could be further reduced to meet the national level A standard of China,providing a promising route to solve the problem of substandard printing and dyeing sewage outfall by a simple coagulation strategy.展开更多
研究了以煤矸石和硫酸烧渣为主要原料研制的聚硅酸铁铝 ( PSFA)混凝剂对炼油厂废水的絮凝作用及混凝剂种类、用量和体系 p H对混凝效果的影响。试验结果表明 ,在较宽 p H范围内 ,PSFA对炼油废水具有良好的混凝处理效果。与传统混凝剂相...研究了以煤矸石和硫酸烧渣为主要原料研制的聚硅酸铁铝 ( PSFA)混凝剂对炼油厂废水的絮凝作用及混凝剂种类、用量和体系 p H对混凝效果的影响。试验结果表明 ,在较宽 p H范围内 ,PSFA对炼油废水具有良好的混凝处理效果。与传统混凝剂相比 ,它具有破乳性能好、投量少、滤饼含水率低、上清液透光性好的特点。展开更多
基金Project(BE2015628)supported by Jiangsu Province Science and Technology Support Program,China
文摘Considering that Fe,Al elements in bauxite residue are active components for water purification,an effective polyaluminum ferric chloride(PAFC)coagulant derived from bauxite residue,with Fe2O3 content>5.1%,Al2O3%>6.5%,basicity>65%,was successfully prepared.The effect of as-prepared PAFC on the zeta potential for printing and dyeing wastewater was investigated.Comparing with polyferric chloride(PFC)and polyferric sulfate(PFS)for printing and dyeing wastewater treatment,prepared bauxite residue-based PAFC exhibited the optimal performance in the aspects of chromaticity and chemical oxygen demand(COD)removal rate.Furthermore,the combination of bauxite residue-based PAFC and PFS for synergy coagulation of such wastewater demonstrated an obvious positive effect.With the proportion between as-prepared PAFC and PFS to be 2.5:1,the COD of treated wastewater could be further reduced to meet the national level A standard of China,providing a promising route to solve the problem of substandard printing and dyeing sewage outfall by a simple coagulation strategy.
文摘研究了以煤矸石和硫酸烧渣为主要原料研制的聚硅酸铁铝 ( PSFA)混凝剂对炼油厂废水的絮凝作用及混凝剂种类、用量和体系 p H对混凝效果的影响。试验结果表明 ,在较宽 p H范围内 ,PSFA对炼油废水具有良好的混凝处理效果。与传统混凝剂相比 ,它具有破乳性能好、投量少、滤饼含水率低、上清液透光性好的特点。
