Adsorptive Removal of Hexavalent Chromium by Diphenylcarbazide-Grafted Macadamia Nutshell Powder
Macadamia nutshell powder oxidized by hydrogen peroxide solutions (MHP) was functionalized by immobilizing 1,5′-diphenylcarbazide (DPC) on its surface. The effectiveness of grafting was confirmed by the Fourier transform infrared spectrum due to the presence of NH and C=C stretches at 3361, 1591, an...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2018-01-01
|
| Series: | Bioinorganic Chemistry and Applications |
| Online Access: | http://dx.doi.org/10.1155/2018/6171906 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832565591806836736 |
|---|---|
| author | Londolani C. Maremeni Sekomeng J. Modise Fanyana M. Mtunzi Michael J. Klink Vusumzi E. Pakade |
| author_facet | Londolani C. Maremeni Sekomeng J. Modise Fanyana M. Mtunzi Michael J. Klink Vusumzi E. Pakade |
| author_sort | Londolani C. Maremeni |
| collection | DOAJ |
| description | Macadamia nutshell powder oxidized by hydrogen peroxide solutions (MHP) was functionalized by immobilizing 1,5′-diphenylcarbazide (DPC) on its surface. The effectiveness of grafting was confirmed by the Fourier transform infrared spectrum due to the presence of NH and C=C stretches at 3361, 1591, and 1486 cm−1, respectively, on the grafted material which were absent in the nongrafted material. Thermogravimetric analysis revealed that the presence of DPC on the surface of Macadamia shells lowered the thermal stability from 300°C to about 180°C owing to the volatile nature of DPC. Surface roughness as a result of grafting was appreciated on the scanning electron microscopy images. Parameters influencing the adsorptive removal of Cr(VI) were examined and found to be optimal at pH 2, 120 min, 150 mg/L, and 2.5 g/L. Grafting MHP with DPC leads to an increase in the Langmuir monolayer capacity from 37.74 to 72.12 mg/g. Grafting MHP with DPC produced adsorbent with improved removal efficiency for Cr(VI). |
| format | Article |
| id | doaj-art-86dc0a0974f74156a2373bd692d59eae |
| institution | Kabale University |
| issn | 1565-3633 1687-479X |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Bioinorganic Chemistry and Applications |
| spelling | doaj-art-86dc0a0974f74156a2373bd692d59eae2025-02-03T01:07:13ZengWileyBioinorganic Chemistry and Applications1565-36331687-479X2018-01-01201810.1155/2018/61719066171906Adsorptive Removal of Hexavalent Chromium by Diphenylcarbazide-Grafted Macadamia Nutshell PowderLondolani C. Maremeni0Sekomeng J. Modise1Fanyana M. Mtunzi2Michael J. Klink3Vusumzi E. Pakade4Department of Chemistry, Faculty of Applied and Computer Sciences, Vaal University of Technology, Private Bag X021, Vanderbijlpark 1911, South AfricaInstitute of Chemical and Biotechnology, Faculty of Applied and Computer Sciences, Vaal University of Technology, Vanderbijlpark 1911, South AfricaDepartment of Chemistry, Faculty of Applied and Computer Sciences, Vaal University of Technology, Private Bag X021, Vanderbijlpark 1911, South AfricaDepartment of Chemistry, Faculty of Applied and Computer Sciences, Vaal University of Technology, Private Bag X021, Vanderbijlpark 1911, South AfricaDepartment of Chemistry, Faculty of Applied and Computer Sciences, Vaal University of Technology, Private Bag X021, Vanderbijlpark 1911, South AfricaMacadamia nutshell powder oxidized by hydrogen peroxide solutions (MHP) was functionalized by immobilizing 1,5′-diphenylcarbazide (DPC) on its surface. The effectiveness of grafting was confirmed by the Fourier transform infrared spectrum due to the presence of NH and C=C stretches at 3361, 1591, and 1486 cm−1, respectively, on the grafted material which were absent in the nongrafted material. Thermogravimetric analysis revealed that the presence of DPC on the surface of Macadamia shells lowered the thermal stability from 300°C to about 180°C owing to the volatile nature of DPC. Surface roughness as a result of grafting was appreciated on the scanning electron microscopy images. Parameters influencing the adsorptive removal of Cr(VI) were examined and found to be optimal at pH 2, 120 min, 150 mg/L, and 2.5 g/L. Grafting MHP with DPC leads to an increase in the Langmuir monolayer capacity from 37.74 to 72.12 mg/g. Grafting MHP with DPC produced adsorbent with improved removal efficiency for Cr(VI).http://dx.doi.org/10.1155/2018/6171906 |
| spellingShingle | Londolani C. Maremeni Sekomeng J. Modise Fanyana M. Mtunzi Michael J. Klink Vusumzi E. Pakade Adsorptive Removal of Hexavalent Chromium by Diphenylcarbazide-Grafted Macadamia Nutshell Powder Bioinorganic Chemistry and Applications |
| title | Adsorptive Removal of Hexavalent Chromium by Diphenylcarbazide-Grafted Macadamia Nutshell Powder |
| title_full | Adsorptive Removal of Hexavalent Chromium by Diphenylcarbazide-Grafted Macadamia Nutshell Powder |
| title_fullStr | Adsorptive Removal of Hexavalent Chromium by Diphenylcarbazide-Grafted Macadamia Nutshell Powder |
| title_full_unstemmed | Adsorptive Removal of Hexavalent Chromium by Diphenylcarbazide-Grafted Macadamia Nutshell Powder |
| title_short | Adsorptive Removal of Hexavalent Chromium by Diphenylcarbazide-Grafted Macadamia Nutshell Powder |
| title_sort | adsorptive removal of hexavalent chromium by diphenylcarbazide grafted macadamia nutshell powder |
| url | http://dx.doi.org/10.1155/2018/6171906 |
| work_keys_str_mv | AT londolanicmaremeni adsorptiveremovalofhexavalentchromiumbydiphenylcarbazidegraftedmacadamianutshellpowder AT sekomengjmodise adsorptiveremovalofhexavalentchromiumbydiphenylcarbazidegraftedmacadamianutshellpowder AT fanyanammtunzi adsorptiveremovalofhexavalentchromiumbydiphenylcarbazidegraftedmacadamianutshellpowder AT michaeljklink adsorptiveremovalofhexavalentchromiumbydiphenylcarbazidegraftedmacadamianutshellpowder AT vusumziepakade adsorptiveremovalofhexavalentchromiumbydiphenylcarbazidegraftedmacadamianutshellpowder |