Chromium (VI) Adsorption on Modified Activated Carbons
The paper presents the research of adsorptive properties of activated carbons to chromium (VI) removal from the water solution. Different types of carbon were investigated: WD-ekstra (WDA), WD-ekstra modified by salt acid WD(HCl) and nitrogen acid WD(HNO<sub>3</sub>). The adsorption kine...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/17/3549 |
| _version_ | 1818451390149689344 |
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| author | Alicja Puszkarewicz Jadwiga Kaleta |
| author_facet | Alicja Puszkarewicz Jadwiga Kaleta |
| author_sort | Alicja Puszkarewicz |
| collection | DOAJ |
| description | The paper presents the research of adsorptive properties of activated carbons to chromium (VI) removal from the water solution. Different types of carbon were investigated: WD-ekstra (WDA), WD-ekstra modified by salt acid WD(HCl) and nitrogen acid WD(HNO<sub>3</sub>). The adsorption kinetics, influence reaction, temperature and kind of carbon were determined using static methods. The adsorption of chromium (VI) onto all activated carbons was most efficient at pH 2. The time of adsorption balance for carbon WD(HCl) was 2.5 h and for carbon WDA 4.5 h. The influence of carbon modification and temperature on the effectiveness of adsorption of hexavalent chromium was determined on the basis of the Freundlich adsorption isotherm. The research showed that the adsorption capacity of Cr(VI) increased with the increasing temperature of the solution. The most efficient adsorbent in static conditions was found on WD-ekstra modified by HCl. The adsorbent applied in dynamic conditions as the filtration bed (v = 2 m/h, time of retention T<sub>R</sub> = 420 s, initial concentration <i>C</i><sub>0</sub> = 1 mg/dm<sup>3</sup>), it removed chromium (VI) from water very effectively. Adsorption capacities after exhaustion of the bed were obtained at P<sub>eWD</sub> <sub>(HCl)</sub> = 4.35 mg/g. On the basis of executed research, chromium ions were successfully eliminated onto modified carbon WD(HCl) that makes its employment capabilities in the systems purification of water. |
| first_indexed | 2024-12-14T21:06:26Z |
| format | Article |
| id | doaj.art-5accbf45908e4683ac51ad323cd68000 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-14T21:06:26Z |
| publishDate | 2019-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-5accbf45908e4683ac51ad323cd680002022-12-21T22:47:25ZengMDPI AGApplied Sciences2076-34172019-08-01917354910.3390/app9173549app9173549Chromium (VI) Adsorption on Modified Activated CarbonsAlicja Puszkarewicz0Jadwiga Kaleta1Department of Water Purification and Protection, Faculty of Civil and Environmental Engineering and Architecture, Rzeszow University of Technology, 35-959 Rzeszów, PolandDepartment of Water Purification and Protection, Faculty of Civil and Environmental Engineering and Architecture, Rzeszow University of Technology, 35-959 Rzeszów, PolandThe paper presents the research of adsorptive properties of activated carbons to chromium (VI) removal from the water solution. Different types of carbon were investigated: WD-ekstra (WDA), WD-ekstra modified by salt acid WD(HCl) and nitrogen acid WD(HNO<sub>3</sub>). The adsorption kinetics, influence reaction, temperature and kind of carbon were determined using static methods. The adsorption of chromium (VI) onto all activated carbons was most efficient at pH 2. The time of adsorption balance for carbon WD(HCl) was 2.5 h and for carbon WDA 4.5 h. The influence of carbon modification and temperature on the effectiveness of adsorption of hexavalent chromium was determined on the basis of the Freundlich adsorption isotherm. The research showed that the adsorption capacity of Cr(VI) increased with the increasing temperature of the solution. The most efficient adsorbent in static conditions was found on WD-ekstra modified by HCl. The adsorbent applied in dynamic conditions as the filtration bed (v = 2 m/h, time of retention T<sub>R</sub> = 420 s, initial concentration <i>C</i><sub>0</sub> = 1 mg/dm<sup>3</sup>), it removed chromium (VI) from water very effectively. Adsorption capacities after exhaustion of the bed were obtained at P<sub>eWD</sub> <sub>(HCl)</sub> = 4.35 mg/g. On the basis of executed research, chromium ions were successfully eliminated onto modified carbon WD(HCl) that makes its employment capabilities in the systems purification of water.https://www.mdpi.com/2076-3417/9/17/3549adsorptionmodified activated carbonremoval of chromium(VI)Freundlich isothermsfiltration |
| spellingShingle | Alicja Puszkarewicz Jadwiga Kaleta Chromium (VI) Adsorption on Modified Activated Carbons Applied Sciences adsorption modified activated carbon removal of chromium(VI) Freundlich isotherms filtration |
| title | Chromium (VI) Adsorption on Modified Activated Carbons |
| title_full | Chromium (VI) Adsorption on Modified Activated Carbons |
| title_fullStr | Chromium (VI) Adsorption on Modified Activated Carbons |
| title_full_unstemmed | Chromium (VI) Adsorption on Modified Activated Carbons |
| title_short | Chromium (VI) Adsorption on Modified Activated Carbons |
| title_sort | chromium vi adsorption on modified activated carbons |
| topic | adsorption modified activated carbon removal of chromium(VI) Freundlich isotherms filtration |
| url | https://www.mdpi.com/2076-3417/9/17/3549 |
| work_keys_str_mv | AT alicjapuszkarewicz chromiumviadsorptiononmodifiedactivatedcarbons AT jadwigakaleta chromiumviadsorptiononmodifiedactivatedcarbons |