Determination of Lead, Cadmium, Copper and Iron Contents in Water by Multi-walled Carbon Nanotubes-solid Phase Extraction
The traditional solid phase extraction sorbent contains certain deficiencies in the progress of processing heavy metals in environmental samples, such as pH instability and co-extraction difficulty. Therefore, it is particularly important to find more efficient sorbents. A solid-phase extraction met...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Science Press, PR China
2014-07-01
|
| Series: | Yankuang ceshi |
| Subjects: | |
| Online Access: | http://www.ykcs.ac.cn/en/article/id/9195bf17-91d2-4a4b-80ec-99eeff96b0c9 |
| _version_ | 1811167514078478336 |
|---|---|
| author | SUN Na CHI Xiao-feng HU Feng-zu YANG Yue-qin |
| author_facet | SUN Na CHI Xiao-feng HU Feng-zu YANG Yue-qin |
| author_sort | SUN Na |
| collection | DOAJ |
| description | The traditional solid phase extraction sorbent contains certain deficiencies in the progress of processing heavy metals in environmental samples, such as pH instability and co-extraction difficulty. Therefore, it is particularly important to find more efficient sorbents. A solid-phase extraction method using multi-walled carbon nanotube as absorbent materials for Pb, Cd, Cu and Fe in water has been determined. The effects of solution pH, elution solution, sample volume and matrix effects were investigated. Pb and Cd were determined by Graphite Furnace Atomic Absorption Spectrometry; alternatively, Cu and Fe were determined by inductively coupled plasma atomic emission spectrometry. Experimental results show that the extraction of the metal elements is most efficient when the pH value is 9.0 and flow rate is 2 mL/min with 1 mol/L HNO3 as the elution solution by using the unmodified multi-walled carbon nanotube (outer diameter <8 nm). The maximum adsorption capacities of multi-walled carbon nanotube for Pb, Cd, Cu and Fe are 44.91, 42.31, 54.68 and 49.07 mg/g, respectively. K+, Na+, Ca2+, Mg2+, benzene and toluene have little effect on Pb, Cd, Cu and Fe extraction. The recoveries of Pb, Cd, Cu and Fe were 95.3%-99.5%, and RSD values (n=7) were 1.2%-3.2%, respectively. Compared with the traditional extraction method, this new method not only has high recovery and enrichment effect, but also is simple and accurate, which can be used in the detection of Cd, Cu, Fe and Pb in environmental water samples. |
| first_indexed | 2024-04-10T16:10:39Z |
| format | Article |
| id | doaj.art-9d9d5eb509de4633b70755493b11e314 |
| institution | Directory Open Access Journal |
| issn | 0254-5357 |
| language | English |
| last_indexed | 2024-04-10T16:10:39Z |
| publishDate | 2014-07-01 |
| publisher | Science Press, PR China |
| record_format | Article |
| series | Yankuang ceshi |
| spelling | doaj.art-9d9d5eb509de4633b70755493b11e3142023-02-10T01:00:32ZengScience Press, PR ChinaYankuang ceshi0254-53572014-07-01334545550ykcs-33-4-545Determination of Lead, Cadmium, Copper and Iron Contents in Water by Multi-walled Carbon Nanotubes-solid Phase ExtractionSUN Na0CHI Xiao-feng1HU Feng-zu2YANG Yue-qin3Institute of Qinghai Province Product Quality Supervision and Inspection, Xining 810008, ChinaNorthwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, ChinaNorthwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, ChinaNorthwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, ChinaThe traditional solid phase extraction sorbent contains certain deficiencies in the progress of processing heavy metals in environmental samples, such as pH instability and co-extraction difficulty. Therefore, it is particularly important to find more efficient sorbents. A solid-phase extraction method using multi-walled carbon nanotube as absorbent materials for Pb, Cd, Cu and Fe in water has been determined. The effects of solution pH, elution solution, sample volume and matrix effects were investigated. Pb and Cd were determined by Graphite Furnace Atomic Absorption Spectrometry; alternatively, Cu and Fe were determined by inductively coupled plasma atomic emission spectrometry. Experimental results show that the extraction of the metal elements is most efficient when the pH value is 9.0 and flow rate is 2 mL/min with 1 mol/L HNO3 as the elution solution by using the unmodified multi-walled carbon nanotube (outer diameter <8 nm). The maximum adsorption capacities of multi-walled carbon nanotube for Pb, Cd, Cu and Fe are 44.91, 42.31, 54.68 and 49.07 mg/g, respectively. K+, Na+, Ca2+, Mg2+, benzene and toluene have little effect on Pb, Cd, Cu and Fe extraction. The recoveries of Pb, Cd, Cu and Fe were 95.3%-99.5%, and RSD values (n=7) were 1.2%-3.2%, respectively. Compared with the traditional extraction method, this new method not only has high recovery and enrichment effect, but also is simple and accurate, which can be used in the detection of Cd, Cu, Fe and Pb in environmental water samples.http://www.ykcs.ac.cn/en/article/id/9195bf17-91d2-4a4b-80ec-99eeff96b0c9water samplespbcdcufesolid phase extractionmulti-walled carbon nanotubes |
| spellingShingle | SUN Na CHI Xiao-feng HU Feng-zu YANG Yue-qin Determination of Lead, Cadmium, Copper and Iron Contents in Water by Multi-walled Carbon Nanotubes-solid Phase Extraction Yankuang ceshi water samples pb cd cu fe solid phase extraction multi-walled carbon nanotubes |
| title | Determination of Lead, Cadmium, Copper and Iron Contents in Water by Multi-walled Carbon Nanotubes-solid Phase Extraction |
| title_full | Determination of Lead, Cadmium, Copper and Iron Contents in Water by Multi-walled Carbon Nanotubes-solid Phase Extraction |
| title_fullStr | Determination of Lead, Cadmium, Copper and Iron Contents in Water by Multi-walled Carbon Nanotubes-solid Phase Extraction |
| title_full_unstemmed | Determination of Lead, Cadmium, Copper and Iron Contents in Water by Multi-walled Carbon Nanotubes-solid Phase Extraction |
| title_short | Determination of Lead, Cadmium, Copper and Iron Contents in Water by Multi-walled Carbon Nanotubes-solid Phase Extraction |
| title_sort | determination of lead cadmium copper and iron contents in water by multi walled carbon nanotubes solid phase extraction |
| topic | water samples pb cd cu fe solid phase extraction multi-walled carbon nanotubes |
| url | http://www.ykcs.ac.cn/en/article/id/9195bf17-91d2-4a4b-80ec-99eeff96b0c9 |
| work_keys_str_mv | AT sunna determinationofleadcadmiumcopperandironcontentsinwaterbymultiwalledcarbonnanotubessolidphaseextraction AT chixiaofeng determinationofleadcadmiumcopperandironcontentsinwaterbymultiwalledcarbonnanotubessolidphaseextraction AT hufengzu determinationofleadcadmiumcopperandironcontentsinwaterbymultiwalledcarbonnanotubessolidphaseextraction AT yangyueqin determinationofleadcadmiumcopperandironcontentsinwaterbymultiwalledcarbonnanotubessolidphaseextraction |