山药提取物絮凝处理直接黑G特性研究
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摘要
以山药为原料,开发环境友好型高分子絮凝剂。采用有机溶剂沉淀法提取山药天然有机物。通过FTIR和元素分析对山药提取物(YE)进行表征。考察山药提取物絮凝剂投加量、温度、pH、无机盐和悬浮物含量对絮凝去除直接黑G的影响。结果表明:山药提取物主要为多糖。投加YE能强化PAC去除直接黑G效果,随着YE投加量的提高,直接黑G去除率也不断提高。pH和温度对YE的絮凝活性有明显影响。在pH=8.0~9.0时,YE则表现出良好的助凝效果。在5~25℃范围内有利于YE发挥絮凝作用。溶液中无机盐与悬浮物对YE絮凝处理水中直接黑G影响不显著。YE是一种去除水中直接黑G较理想的天然絮凝剂。
Chinese yam was used as raw material to develop environmental friendly macromolecular flocculant. Natural organic matters were extracted from Chinese yam by organic solvent precipitation method. Yam extract( YE) was characterized by FTIR and elemental analysis. The effects of flocculant dosage,temperature,pH,inorganic salt and suspended solid on coagulation removal of direct black G were investigated. Results showed that the yam extract was mainly composed of polysaccharide. The coagulation removal of direct black G by PAC could be enhanced by addition of YE. The removal of direct black G increased with the increase of dosages of YE. Both of p H and temperature had significant influences on flocculation activity of YE. YE showed good coagulation aid effect at pH= 8. 0-9. 0. The optimal temperature range for YE flocculant was 5-25 ℃. The presence of inorganic salt and suspended solid did not affect direct black G removal significantly. YE is an ideal natural flocculant for removing direct black G from water.
Chinese yam was used as raw material to develop environmental friendly macromolecular flocculant. Natural organic matters were extracted from Chinese yam by organic solvent precipitation method. Yam extract( YE) was characterized by FTIR and elemental analysis. The effects of flocculant dosage,temperature,pH,inorganic salt and suspended solid on coagulation removal of direct black G were investigated. Results showed that the yam extract was mainly composed of polysaccharide. The coagulation removal of direct black G by PAC could be enhanced by addition of YE. The removal of direct black G increased with the increase of dosages of YE. Both of p H and temperature had significant influences on flocculation activity of YE. YE showed good coagulation aid effect at pH= 8. 0-9. 0. The optimal temperature range for YE flocculant was 5-25 ℃. The presence of inorganic salt and suspended solid did not affect direct black G removal significantly. YE is an ideal natural flocculant for removing direct black G from water.
引文
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[4]吴思启,汪恂,朱雷,等.Ti O2对染料废水吸附强化及选择性去除研究[J].工业水处理,2018,38(11):73-77.WU S Q,WANG X,ZHU L,et al.Research on the adsorption enhancement and selectivity removal of dye wastewater by titanium dioxide[J].Industrial Water Treatment,2018,38(11):73-77.
[5]LIN J J,SUN M Q,LIU X W,et al.Functional kaolin supported nanoscale zero-valent iron as a fenton-like catalyst for the degradation of direct black G[J].Chemosphere,2017,184:664-672.
[6]孙立伟.壳聚糖/轻烧氧化镁/粉煤灰/复合材料的制备及其对直接染料的吸附研究[D].呼和浩特:内蒙古师范大学,2018.SUN L W.Preparation of CTS/LCM/FA composite and its adsorption for direct dyes from aqueous solution[D].Hohhot:Inner Monglia Normal University,2018.
[7]JIN X Y,CHEN Z X,ZHOU R B,et al.Synthesis of kaolin supported nanoscale zero-valent iron and its degradation mechanism of direct fast black G in aqueous solution[J].Materials Research Bulletin,2015,61:433-438.
[8]LIU X W,CHEN Z X,CHEN Z L,et al.Remediation of direct black G in wastewater using kaolin-supported bimetallic Fe/Ni nanoparticles[J].Chemical Engineering Journal,2013,223:764-771.
[9]SALEHIZADEH H,YAN N,FARNOOD R.Recent advances in polysaccharide bio-based flocculants[J].Biotechnology Advances,2018,36(1):92-119.
[10]李彬.山药淀粉品质特性的研究与应用[D].天津:天津科技大学,2015.LI B.Research and application of yam starch qualify characteristics[D].Tianjin:Tianjin University of Science and Technology,2015.
[11]SAKEER K,ISPASSZABO P,BENYERBAH N,et al.Ampholytic starch excipients for high loaded drug formulations:mechanistic insights[J].International Journal of Pharmaceutics,2018,535:201-216.
[12]YANG Z,WU H,YUAN B,et al.Synthesis of amphoteric starch-based grafting flocculants for flocculation of both positively and negatively charged colloidal contaminants from water[J].Chemical Engineering Journal,2014,244:209-217.
[13]TIE J X,JIANG M B,LI H C,et al.A comparison between Moringa oleifera seed presscake extract and polyaluminum chloride in the removal of direct black 19 from synthetic wastewater[J].Industrial Crops and Products,2015,74:530-534.
[14]ZHAO S,GAO B Y,WANG Y,et al.Influence of a new coagulant aid-enteromorpha extract on coagulation performance and floc characteristics of aluminum sulfate coagulant in kaolin-humic acid solution treatment[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2013,417:161-169.
[15]栾兆坤,冯利,汤鸿宵.水解聚合铝溶液中形态分布的定量模拟研究[J].环境科学学报,1995,15(1):39-42.LUAN Z K,FENG L,TANG H X.Studies on quantitative model for species distribution of hydroxy polyaluminum chloride[J].Acta Scientiae Circumstantiae,1995,15(1):39-42.
[16]ZHAO S,GAO B,YUE Q Y,et al.Study of enteromorpha polysaccharides as a new-style coagulant aid in dye wastewater treatment[J].Carbohydrate Polymers,2014,103:179-186.
[17]刘俊吉,周亚平,李松林,等.物理化学[M].北京:高等教育出版社,2017.LIU J J,ZHOU Y P,LI S L,et al.Physical chemistry[M].Beijing:Higher Education Press,2017.
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