Tartrazine Removal from Aqueous Solution by HDTMA-Br-Modified Colombian Bentonite
The effect of pH, ionic strength (NaCl added), agitation speed, adsorbent mass, and contact time on the removal of tartrazine from an aqueous solution, using an organobentonite, has been studied. A complete factorial design 32 with two replicates was used to evaluate the influence of the dye concent...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2019/2042563 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832565798055444480 |
|---|---|
| author | Ronald A. Otavo-Loaiza Nancy R. Sanabria-González Gloria I. Giraldo-Gómez |
| author_facet | Ronald A. Otavo-Loaiza Nancy R. Sanabria-González Gloria I. Giraldo-Gómez |
| author_sort | Ronald A. Otavo-Loaiza |
| collection | DOAJ |
| description | The effect of pH, ionic strength (NaCl added), agitation speed, adsorbent mass, and contact time on the removal of tartrazine from an aqueous solution, using an organobentonite, has been studied. A complete factorial design 32 with two replicates was used to evaluate the influence of the dye concentration (30, 40, and 50 mg/L) and amount of adsorbent (25, 35, and 45 mg) on decolorization of the solution. Experimental data were evaluated with Design Expert® software using a response surface methodology (RSM) in order to obtain the interaction between the processed variables and the response. pH values between 2 and 9, stirring speed above 200 rpm, and contact time of 60 min did not have a significant effect on decolorization. The optimum conditions for maximum removal of tartrazine from an aqueous solution of 30 mg/L were follows: pH = 6.0, NaCl concentration = 0.1 M, stirring speed = 230 rpm, temperature = 20°C, contact time = 60 min, and the organobentonite amount = 38.04 mg. The equilibrium isotherm at 20°C was analyzed by means of the Langmuir and Freundlich models, and the maximum adsorption capacity obtained was 40.79 ± 0.71 mg/g. This adsorption process was applied in a sample of industrial wastewater containing tartrazine and sunset yellow, having obtained a decolorization rate higher than 98% for both dyes. These results suggest that organobentonite is an effective adsorbent for the removal of anionic dyes from an aqueous solution. |
| format | Article |
| id | doaj-art-897b1993121a4343adf6abf29ae5881a |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-897b1993121a4343adf6abf29ae5881a2025-02-03T01:06:41ZengWileyThe Scientific World Journal2356-61401537-744X2019-01-01201910.1155/2019/20425632042563Tartrazine Removal from Aqueous Solution by HDTMA-Br-Modified Colombian BentoniteRonald A. Otavo-Loaiza0Nancy R. Sanabria-González1Gloria I. Giraldo-Gómez2Departamento de Ingeniería Química, Facultad de Ingeniería y Arquitectura, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 Vía al Aeropuerto, AA 127 Manizales, ColombiaDepartamento de Ingeniería Química, Facultad de Ingeniería y Arquitectura, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 Vía al Aeropuerto, AA 127 Manizales, ColombiaDepartamento de Física y Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 Vía al Aeropuerto, AA 127 Manizales, ColombiaThe effect of pH, ionic strength (NaCl added), agitation speed, adsorbent mass, and contact time on the removal of tartrazine from an aqueous solution, using an organobentonite, has been studied. A complete factorial design 32 with two replicates was used to evaluate the influence of the dye concentration (30, 40, and 50 mg/L) and amount of adsorbent (25, 35, and 45 mg) on decolorization of the solution. Experimental data were evaluated with Design Expert® software using a response surface methodology (RSM) in order to obtain the interaction between the processed variables and the response. pH values between 2 and 9, stirring speed above 200 rpm, and contact time of 60 min did not have a significant effect on decolorization. The optimum conditions for maximum removal of tartrazine from an aqueous solution of 30 mg/L were follows: pH = 6.0, NaCl concentration = 0.1 M, stirring speed = 230 rpm, temperature = 20°C, contact time = 60 min, and the organobentonite amount = 38.04 mg. The equilibrium isotherm at 20°C was analyzed by means of the Langmuir and Freundlich models, and the maximum adsorption capacity obtained was 40.79 ± 0.71 mg/g. This adsorption process was applied in a sample of industrial wastewater containing tartrazine and sunset yellow, having obtained a decolorization rate higher than 98% for both dyes. These results suggest that organobentonite is an effective adsorbent for the removal of anionic dyes from an aqueous solution.http://dx.doi.org/10.1155/2019/2042563 |
| spellingShingle | Ronald A. Otavo-Loaiza Nancy R. Sanabria-González Gloria I. Giraldo-Gómez Tartrazine Removal from Aqueous Solution by HDTMA-Br-Modified Colombian Bentonite The Scientific World Journal |
| title | Tartrazine Removal from Aqueous Solution by HDTMA-Br-Modified Colombian Bentonite |
| title_full | Tartrazine Removal from Aqueous Solution by HDTMA-Br-Modified Colombian Bentonite |
| title_fullStr | Tartrazine Removal from Aqueous Solution by HDTMA-Br-Modified Colombian Bentonite |
| title_full_unstemmed | Tartrazine Removal from Aqueous Solution by HDTMA-Br-Modified Colombian Bentonite |
| title_short | Tartrazine Removal from Aqueous Solution by HDTMA-Br-Modified Colombian Bentonite |
| title_sort | tartrazine removal from aqueous solution by hdtma br modified colombian bentonite |
| url | http://dx.doi.org/10.1155/2019/2042563 |
| work_keys_str_mv | AT ronaldaotavoloaiza tartrazineremovalfromaqueoussolutionbyhdtmabrmodifiedcolombianbentonite AT nancyrsanabriagonzalez tartrazineremovalfromaqueoussolutionbyhdtmabrmodifiedcolombianbentonite AT gloriaigiraldogomez tartrazineremovalfromaqueoussolutionbyhdtmabrmodifiedcolombianbentonite |