Alginate-Polymer-Caged, C18-Functionalized Magnetic Titanate Nanotubes for Fast and Efficient Extraction of Phthalate Esters from Water Samples with Complex Matrix
Alginate-Polymer-Caged, C18-Functionalized Magnetic Titanate Nanotubes for Fast and Efficient Extraction of Phthalate Esters from Water Samples with Complex Matrix
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海藻酸盐聚合物笼状 C18 功能化磁性钛酸盐纳米管，用于从复杂基质的水样中快速高效地提取邻苯二甲酸酯
DOI：
10.1021/am100010x
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发表时间：
2010-04-01
影响因子：
9.5
通讯作者：
Cai, Yaqi
中科院分区：
文献类型：
--
作者：
Niu, Hongyun;Zhang, Shengxiao;Cai, Yaqi
制备了磁性钛酸盐纳米管(Fe3O4-TN复合材料)，并用C-18基团对其进行官能化，然后用亲水性海藻酸盐聚合物笼包覆在纳米管上。该材料(ALG@C-18-Fe3O4-TN)具有较大的比表面积、超顺磁性、高吸附能力和良好的水分散性。Alg@C-18-Fe3O4-TNS对邻苯二甲酸二丙酯(DPP)、邻苯二甲酸二丁酯(DBP)、邻苯二甲酸二环己酯(DCP)和邻苯二甲酸二辛酯(DOP)具有较高的萃取效率。溶液中分散的吸附剂在外加磁场作用下可在10min内被捕集。在不降低萃取效率的情况下，可以在高盐度、酸碱溶液或富含腐植酸的样品等极端条件下进行萃取。在10 0 mg L-1腐植酸(11 As)存在下，pH和Gt；6不影响被分析物的回收率，只有在酸性溶液中才能观察到DPP和DCP的回收率下降。电势分析和与富含邻苯二甲酸或正庚酸的基质的对比研究表明，吸附剂对HAS的干扰能力主要是由于海藻酸笼对HAS的排斥作用和尺寸排斥作用所致。在优化的条件下，采用ALG@C-18-Fe3O4-TNS对几种环境水样进行分析，邻苯二甲酸酯类化合物的浓度系数为1000，检出限为11-46 ng L-1，加标回收率为84-109%。
The magnetic titanate nanotube (Fe3O4-TN composite) was prepared and functionalized with C-18 groups and then coated by a hydrophilic alginate polymer cage. This material (ALG@C-18-Fe3O4-TN) exhibited the properties of large surface area, superparamagnetism, high adsorption ability, and good dispersibility in water. ALG@C-18-Fe3O4-TNs possessed high extraction efficiency to phthalate esters di-n-propyl-phthalate (DPP), di-n-butyl-phthalate (DBP), dicyclohexyl-phthalate (DCP), and di-n-octyl-phthalate (DOP). The dispersed adsorbents in solution could be collected with an external magnetic field within 10 min. The extraction could be conducted under some extreme conditions such as high salinity, acid or alkali solution or humic acid-rich samples without the decrease in extraction efficiency. In the presence of 100 mg L-1 humic acid (11 As), the recoveries of analytes were not affected at pH >6, and decreased recoveries of DPP and DCP were observed only in acid solution. Potential analysis and comparison study with the biphthalate acid or n-decanoic acid-rich matrix indicated that the anti-interference ability of adsorbents to HAs mainly resulted from the repulsion interaction and size exclusion provided by alginate cage to HAS. Under the optimized conditions, ALG@C-18-Fe3O4-TNs were used to analyze several environmental water samples, a concentration factor of 1000 and detection limits of phthalate esters ranging in 11-46 ng L-1 were achieved, and the recoveries of analytes were in the range of 84-109% for all samples.