摘要
采用溶解-相转化法制备榴莲壳粉-聚偏氟乙烯(PVDF)复合膜吸附剂,通过扫描电镜(SEM)和红外光谱(FTIR)对吸附剂进行表征,同时考察了榴莲壳粉/PVDF质量比、溶液pH值、吸附剂用量和吸附时间的影响。结果表明:复合膜对次甲基蓝的吸附的最佳条件为:榴莲壳粉/PVDF质量比为0.75∶1,溶液pH值为7,吸附剂用量为0.4 g,吸附时间为90 min。吸附遵循准二级动力学方程和Langmuir方程,吸附剂经5次重复使用,对次甲基蓝去除率为81.25%。
The composite membranes of durian shell powder-polyvinylidene fluoride(PVDF) were prepared through dissolutionphase transformation method and characterized by scanning electron microscopy(SEM) and Fourier transform infrared(FTIR). The effect factors such as mass ratios of durian shell powder and PVDF,pH of solution,adsorbent dosage and adsorption time were studied. The results showed that optimal adsorption conditions of the composite membranes for methylene blue could be achieved when mass ratios of durian shell powder/PVDF was 0. 75∶ 1,the solution pH was 7,adsorbent dosage was 0. 4 g,and adsorption time was 90 min. The adsorption followed pseudo second order kinetics equation and Langmuir equation. After be recycled five times,the removal rate of methylene blue was still up to 81. 25%.
引文
[1]Hu M X,Li J N,Zhang S L,et al.Hydrophilic modification of PVDF microfiltration membranes by adsorption of facial amphiphile cholic acid[J].Colloids and Surfaces B:Biointerfaces,2014,123:809-813.
[2]Rahimi Z,Zinatizadeh A A,Zinadini S.Milk processing wastewater treatment in a bioreactor followed by an antifouling Ocarboxymethyl chitosan modified Fe3O4/PVDF ultrafiltration membrane[J].Journal of Industrial and Engineering Chemistry,2016,38:103-112.
[3]Ekambaram K,Doraisamy M.Study on the fabrication,characterization and performance of PVDF/calcium stearate composite nanofiltration membranes[J].Desalination,2016,385:24-38.
[4]Zuo X T,Wang L L,He J J,et al.SEM-EDX studies of Si O2/PVDF membranes fouling in electrodialysis of polymer-flooding produced wastewater:Diatomite,APAM and crude oil[J].Desalination,2014,347(17):43-51.
[5]Ding S Y,Yang Y,Li C,et al.The effects of organic fouling on the removal of radionuclides by reverse osmosis membranes[J].Water Research,2016,95:174-184.
[6]贾倩,相波,李义久.纳米壳聚糖改性PVDF微滤膜抗污染性能的研究[J].膜科学与技术,2012,32(5):63-67.
[7]张裕卿,张红柳,曲云.填充纳米Si O2对聚偏氟乙烯膜性能的影响[J].膜科学与技术,2007,27(6):47-51.
[8]Ngang H P,Ooi B S,Ahmad A L,et al.Preparation of PVDFTi O2mixed-matrix membrane and its evaluation on dye adsorption and UV-cleaning properties[J].Chemical Engineering Journal,2012,197(29):359-367.
[9]由钰婷,汪阳,张霞.纳米Ti O2共混改性PVDF复合膜的制备和性能[J].材料研究学报,2012,26(3):247-253.
[10]Zhang X,Wang Y,Liu Y F,et al.Preparation,performances of PVDF/Zn O hybrid membranes and their applications in the removal of copper ions[J].Applied Surface Science,2014,316(1):333-340.
[11]刘兴甜,张桂芳,赵义平,等.FVDF/改性凹凸棒土复合膜及其Ni(Ⅱ)吸附性能研究[J].功能材料,2013,44(24):3546-3549.
[12]魏汉辉,刘红斌,吕晓龙,等.纳米氢氧化铝镁改性PVDF膜性能的研究[J].膜科学与技术,2009,29(6):20-25.
[13]吴超超,刘根,徐君莉,等.PVDF/Zr O2杂化膜的制备及吸附牛血红蛋白的性能[J].高等学校化学学报,2014,35(4):784-790.
[14]吴文炳,李晓,张卫英,等.羧基功能化榴莲壳对水中Pb(Ⅱ)和Cr(Ⅲ)的生物吸附研究[J].功能材料,2015,46(22):22037-22044.
[15]黄晓东,娄本勇.硫脲改性榴莲壳对水溶液中Pb2+、Cd2+的吸附研究[J].西南农业学报,2012,25(1):266-270.
[16]黄晓东,林祥潮.三乙烯四胺改性榴莲壳吸附水溶液中的Cd2+、Pb2+[J].广州化学,2012,37(1):7-12.
[17]谢雄,鲍建国,朱小燕,等.m-Zr O2/PVDF共混膜的制备及性能研究[J].水处理技术,2014,40(12):61-65.
