尝试以纺织边角料对位芳纶纤维(PPTA)为吸附材料,研究其对水中亚甲基蓝(阳离子染料)和刚果红(阴离子染料)的吸附,并对吸附前后的PPTA进行表征。结果表明,在PPTA为优化投加量0.1 g下,对100 m L质量浓度均为30 mg/L的亚甲基蓝、刚果红的...尝试以纺织边角料对位芳纶纤维(PPTA)为吸附材料,研究其对水中亚甲基蓝(阳离子染料)和刚果红(阴离子染料)的吸附,并对吸附前后的PPTA进行表征。结果表明,在PPTA为优化投加量0.1 g下,对100 m L质量浓度均为30 mg/L的亚甲基蓝、刚果红的去除率最高分别可达89.5%和88.3%(适宜的p H分别为9和6)。PPTA对亚甲基蓝和刚果红的吸附动力学模型更符合准2级反应模型,吸附等温线更符合Freundlich吸附等温方程。经过一次再生后的PPTA仍具有较强吸附能力。其对染料吸附性能与传统活性炭相近,是具有发展前景的新型可分离回收的吸附功能材料。展开更多
A new ternary coagulant polysilicate ferromanganese(PSFM),composed of Fe,Mn and Si,was designed.Its coagulation performance for dye removal was investigated systematically together with the impact of several key opera...A new ternary coagulant polysilicate ferromanganese(PSFM),composed of Fe,Mn and Si,was designed.Its coagulation performance for dye removal was investigated systematically together with the impact of several key operational parameters.The experimental results indicate that an excellent coagulation efficiency with higher than 95%color removal and higher than 94%total organic carbon(TOC)removal can be obtained at an optimized molar ratio of Si∶Fe∶Mn(5∶5∶1).The coagulation performance of PSFM coagulant was studied comparatively with other conventional coagulants,e.g.poly aluminium chloride(PAC),Al_(2)(SO_(4))_(3)and FeCl_(3).Additionally,various characterization techniques were applied to get detailed morphological and compositional information of PSFM coagulants.Furthermore,the underlying mechanism for improved coagulant performance was proposed based on these results.These results have exemplified quantitatively that PSFM coagulant exhibits a great potential as a promising material for application in various environmental fields.展开更多
基金National Natural Science Foundation of China(No.21876025)National Key Research and Development Program of China(No.2019YFC0408304)。
文摘A new ternary coagulant polysilicate ferromanganese(PSFM),composed of Fe,Mn and Si,was designed.Its coagulation performance for dye removal was investigated systematically together with the impact of several key operational parameters.The experimental results indicate that an excellent coagulation efficiency with higher than 95%color removal and higher than 94%total organic carbon(TOC)removal can be obtained at an optimized molar ratio of Si∶Fe∶Mn(5∶5∶1).The coagulation performance of PSFM coagulant was studied comparatively with other conventional coagulants,e.g.poly aluminium chloride(PAC),Al_(2)(SO_(4))_(3)and FeCl_(3).Additionally,various characterization techniques were applied to get detailed morphological and compositional information of PSFM coagulants.Furthermore,the underlying mechanism for improved coagulant performance was proposed based on these results.These results have exemplified quantitatively that PSFM coagulant exhibits a great potential as a promising material for application in various environmental fields.
