摘要
利用皇竹草制备成生物炭,运用扫描电镜、傅立叶红外光谱仪、元素分析仪、X射线衍射分析对生物炭理化性质进行表征,同时探讨其对水中磺胺类抗生素的吸附特性。结果表明,生物炭对磺胺类抗生素的去除效果受生物炭添加量、吸附时间、磺胺类抗生素初始浓度和溶液pH的影响较显著,而受温度的影响不显著。在25℃、pH=5、皇竹草炭用量分别为8 g/L和5 g/L、磺胺类抗生素的质量浓度为10 mg/L条件下吸附4 h,磺胺嘧啶(SDZ)和磺胺氯哒嗪(SCP)的去除率分别能够达到93.6%和92.7%。皇竹草炭对磺胺类抗生素的吸附动力学更符合拟2级动力学方程,吸附等温线符合Freundlich方程。吸附过程主要受快速反应控制。
Natural silk fibroin is insoluble in water, soluble in strong acid, strong alkali and some neutral salt solution. In order to obtain high purity of soluble silk fibroin, desalination is the key link. After passing through dissolved silk fibroin in calcium chloride ethanol-water ternary system alter degummed for making soluble silk fibroin solution, using diffusion dialysis and electrodialysis integrated membrane to desalinate. This process compared with the traditional dialysis bag method, has advantages of a short time-consuming, high desalination rate could reach above 99.98% and recovery could reach 90.1%.
出处
《水处理技术》
CAS
CSCD
北大核心
2017年第4期56-61,65,共7页
Technology of Water Treatment
基金
国家水体污染控制与治理科技重大专项(2014ZX07206001)
广东省自然科学基金(PM-zx018-201509-043)
关键词
皇竹草
生物炭
磺胺类抗生素
吸附
silk fibroin
desalination
diffusion dialysis
electrodialysis
