印花废水中海藻酸钠的回收  

Recovery of Sodium Alginate From Printing Wastewater

作　　者：陶宇庆 巩继贤[1,2] 任燕飞[1,2] 李政[1,2] 李秋瑾[1,2] 张健飞[1,2] Tao Yuqing;Gong Jixian;Ren Yanfei;Li Zheng;Li Qiujin;Zhang Jianfei(School of Textiles Science and Engineering,Tianjin Polytechnic University,Tianjin 300387,China;Key Laboratory for Advanced Textile Composites of Ministry of Education,Tianjin Polytechnic University,Tianjin 300387,China)

机构地区：[1]天津工业大学纺织科学与工程学院,天津300387 [2]天津工业大学先进纺织复合材料教育部重点实验室,天津300387

出　　处：《针织工业》2019年第7期34-37,共4页Knitting Industries

基　　金：国家重点研发计划(2016YFC0400503-02);新疆自治区重大专项(2016A03006-3);天津自然科学基金项目(2016A03006-3);中国纺织工业联合会科技指导性项目(2017011)

摘　　要：文中采用钙凝-酸化法从模拟印花废水中回收海藻酸钠,研究了氧化剂用量和氧化条件对海藻酸钠的漂白效果,探讨了酸洗对海藻酸钙脱钙效果影响,并对回收海藻酸钠的结构和性能进行了分析。结果表明,次氯酸钠漂白(有效氯含量2%)最佳工艺条件为溶液pH值9.5,时间30min,次氯酸钠用量0.01g/mL,通过脱色纯化制得海藻酸钠色差4E为9.8,黏度为135mPa·s;酸处理海藻酸钙最适脱钙条件为:酸溶液pH值1.6,酸洗次数两次,处理后海藻酸钠的RV值降低至20%,有较好的脱钙效果;对海藻酸钠性质进行定性分析和红外光谱分析可以判断印花废水中的提取物为海藻酸钠,其黏度为135mPa·s,提取率约为30%。In this paper,the sodium alginate was recovered from the simulated printing wastewater by calcium coagulation-acidification method.The bleaching effect of oxidant dosage and oxidation conditions on sodium alginate was studied.The effect of pickling on the decalcification of calcium alginate was discussed,and the structure and properties of recovered sodium alginate was analyzed.The results show that the optimum process conditions for sodium hypochlorite bleaching with sodium hypochlorite(2%)were:the solution with pH 9.5,time of 30 minutes and sodium hypochlorite dosage of 0.01 g/mL,the obtained sodium alginate color difference AE was 9.8 and viscosity was 135 mPa·s by decolorization and purification.In addition,the optimal decalcification conditions for acid treatment were:hydrochloric acid solution with pH 1.6,acid washing twice in 90 minutes with constant stirring speed,RV value was reduced to 20%after treatment.The extract was qualitative and FTIR spectrally determined as sodium alginate with a viscosity of 135 mPa·s and an extraction rate of approximate 30%.

关 键 词：印花废水 海藻酸钠 漂白 脱钙 回收 

分 类 号：X791[环境科学与工程—环境工程]