Selective separation of arsenic species from aqueous solutions with immobilized macrocyclic material containing solid phase extraction columns.
Selective separation of arsenic species from aqueous solutions with immobilized macrocyclic material containing solid phase extraction columns.
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使用含有固相萃取柱的固定大环材料从水溶液中选择性分离砷物质。
DOI：
10.1016/j.chemosphere.2010.10.045
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发表时间：
2011
期刊：
影响因子：
8.8
通讯作者：
H. Hasegawa
中科院分区：
文献类型：
--
作者：
I. Rahman;Z. A. Begum;M. Nakano;Y. Furusho;T. Maki;H. Hasegawa
采用固相萃取(SPE)柱分离水溶态砷：亚砷酸盐、亚砷酸盐、单甲基砷酸(MMA)和二甲基砷酸(DMA)。固相萃取柱，即AnaLig TE-01(TE-01)、AnaLig AN-01 Si(AN-01)和AnaLig AS-01 PA(AS-01)，含有作为吸附剂的固定化大环物质，通常被称为分子识别技术(MRT)凝胶。在pH为4~10的条件下，研究了MRT凝胶固相萃取柱的保留、萃取和回收行为。添加100μM砷的强化去离子水以0.2mLmin-1的流速处理。保留在AS-01柱中的砷物种用硝酸(0.1M)和氢氧化钠(2.0M)洗脱。共存离子(Na~+、K~+、Ca~(2+)、Mg~(2+)、Cl~-、NO_3~-、CH_3COO~-、PO_4~(3-)、SO_4~(2-)、ClO_4~-)(10 MM)的干扰可忽略不计。利用不同pH值的MRT凝胶固相萃取柱对不同形态砷的萃取回收行为的差异，实现了As(III)、As(V)、MMA和DMA的定量分离。砷物种与MRT凝胶之间的络合是所提出技术的核心现象，因为MRT凝胶的络合作用预计比基于树脂的分离过程更强。与其他已报道的固相萃取柱相比，MRT凝胶固相萃取柱在与As(III)的性能方面具有优势。吸附材料在100多次加载和洗脱循环中毫不费力地再生和保持不变的分离性能，是考虑使用MRT凝胶固相萃取柱进行灵敏和选择性砷形态分离的其他坚固特性。
A combination of solid phase extraction (SPE) columns was used for selective separation of water-soluble arsenic species: arsenite, arsenate, monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA). The SPE columns, namely AnaLig TE-01 (TE-01), AnaLig AN-01 Si (AN-01) and AnaLig As-01 PA (As-01), contain immobilized macrocyclic material as the sorbent and commonly known as molecular recognition technology (MRT) gel. The retention, extraction and recovery behavior of the MRT gel SPE columns were studied at pH 4–10. Fortified deionized water spiked with 100μM of arsenic species were treated at the flow rate of 0.2mLmin–1. HNO3(1.0 and 6.0M) was used as eluent to recover the retained arsenic species from TE-01 and AN-01 SPE columns. Arsenic species retained in the As-01 column were eluted with HNO3(0.1M) followed by NaOH (2.0M). Likely interference from the various coexisting ions (Na+, K+, Ca2+, Mg2+, Cl–, NO3-, CH3COO–, PO43-, SO42-, ClO4-) (10mM) were negligible. Quantitative separation of As(III), As(V), MMA and DMA was achieved based on the differences in extraction and recovery behavior of the MRT gel SPE columns with pH for different arsenic species. Complexation between arsenic species and MRT gel is the core phenomenon of the proposed technique as the complexation of MRT gels is expected to be stronger than the resin-based separation processes. MRT gel SPE columns are advantageous as compared with other reported SPE columns in terms of its performance with As(III). Effortless regeneration and unaltered separation performance of the sorbent materials for more than 100 loading and elution cycles are other sturdy characteristics to consider the MRT gel SPE columns for sensitive and selective arsenic species separation.
影响因子：
6.1
作者：
Jitmanee, K;Oshima, M;Motomizu, S
通讯作者：
Motomizu, S