壳聚糖/羟基磷灰石微球对水中Cr6+的吸附研究Adsorption of Cr6+ from Aqueous Solution by Chitosan/Hydroxyapatite Microspheres
张婵,高晓红,邓钏,张志鹏,韩振峰
摘要(Abstract)：
以壳聚糖和羟基磷灰石为原料,采用反相乳化法制备了壳聚糖/羟基磷灰石微球作为吸附剂,并对其结构进行表征。考察了pH、Cr~(6+)初始浓度以及吸附时间对该微球吸附性能的影响。结果表明:壳聚糖/羟基磷灰石微球为圆球形,分散度好,平均粒径为30μm,具有较好的吸附性能。温度30℃,体系p H4.0,吸附时间240 min的条件下,25 mg微球对10 mg/L Cr~(6+)的吸附率高于73%.Lagergren一级吸附速率方程能更好的描述微球对Cr~(6+)的吸附行为。30℃下,微球对Cr~(6+)的吸附平衡符合Langmuir等温吸附方程。
关键词(KeyWords)： 壳聚糖/羟基磷灰石微球;Cr6+;吸附;热力学;动力学
基金项目(Foundation): 山西省青年科技研究基金(2013021011-7);; 山西省高校大学生创新创业训练项目(2015274)
作者(Author): 张婵,高晓红,邓钏,张志鹏,韩振峰
参考文献(References)：
- [1]KUMAR M P,PHANIKUMAR B R.Response surface modelling of Cr6+adsorption from aqueous solution by neem bark powder:Box-Behnken experimental approach[J].Environmental Science and Pollution Research,2013,20(3):1327-1343.
- [2]LIU S C,ZHOU J X,XUE G F.The study of organic bentonite competitive adsorption model for phenol and Cr6+based on MATLAB[C]//Applied Mechanics and Materials.Trans Tech Publications,2014,675:466-470.
- [3]SHI H,LI J,SHI D,et al.Combined Reduction/Precipitation,Chemical Oxidation,and Biological Aerated Filter Processes for Treatment of Electroplating Wastewater[J].Separation Science and Technology,2015,50(15):2303-2310.
- [4]ADEDIRAN G O,ADEDIJI J F,ADEBAYO M A,et al.Removal of Pb2+and Cr6+ions from aqueous solution by earthworm cast soil[J].International Journal of Physical Sciences,2009,4(11):691-697.
- [5]SWAMINATHAN E,NAGAPPAN S,RAJANGAM P,et al.Separation of Ni2+,Cu2+and Cr6+Metal Ions from Water by Complexation Micro Filtration Technique Using Synthetic Polymer Membranes[J].2013,2(2):47-54.
- [6]THAKUR R S,CHAUDHARY R,SINGH C.Influence of p H on photocatalytic reduction,adsorption,and deposition of metal ions:speciation modeling[J].Desalination and Water Treatment,2015,56(5):1335-1363.
- [7]HALDORAI Y,SHIM J J.An efficient removal of methyl orange dye from aqueous solution by adsorption onto chitosan/Mg O composite:A novel reusable adsorbent[J].Applied Surface Science,2014,292:447-453.
- [8]MOURABET M,EL RHILASSI A,EL BOUJAADY H,et al.Removal of fluoride from aqueous solution by adsorption on hydroxyapatite(HAp)using response surface methodology[J].Journal of Saudi Chemical Society,2015,19(6):603-615.
- [9]李湘南,陈晓明,彭志明,等.纳米羟基磷灰石/壳聚糖载药微球的制备及性能[J].中南大学学报:自然科学版,2011,42(5):1232-1237.
- [10]张越,师宪宪,于奕峰.壳聚糖微球的制备方法研究进展[J].河北科技大学学报,2013,34(5):58-63.
- [11]冯帆.交联壳聚糖球的制备及其对Cr(VI)吸附性能的研究[D].北京:北京化工大学,2013.
- [12]张艳.壳聚糖复合吸附剂吸附刚果红和Cr(VI)的研究[D].天津:天津工业大学,2013.