Gemini Surfactant-Modified Activated Carbon for Remediation of Hexavalent Chromium from Water
Gemini surfactants, with double hydrophilic and hydrophobic groups, offer potentially orders of magnitude greater surface activity compared to similar single unit molecules. A cationic Gemini surfactant (Propyl didodecyldimethylammonium Bromide, PDDDAB) and a conventional cationic surfactant (Dodecy...
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doaj-52d7feaf0bd4464aa3a6a7577097804b2020-11-24T22:12:45ZengMDPI AGWater2073-44412018-01-011019110.3390/w10010091w10010091Gemini Surfactant-Modified Activated Carbon for Remediation of Hexavalent Chromium from WaterYingying Zhou0Zhenghua Wang1Andrew Hursthouse2Bozhi Ren3Hunan Provincial Key Laboratory of Shale Gas Resource Exploitation, Xiangtan 411201, ChinaHunan Provincial Key Laboratory of Shale Gas Resource Exploitation, Xiangtan 411201, ChinaHunan Provincial Key Laboratory of Shale Gas Resource Exploitation, Xiangtan 411201, ChinaHunan Provincial Key Laboratory of Shale Gas Resource Exploitation, Xiangtan 411201, ChinaGemini surfactants, with double hydrophilic and hydrophobic groups, offer potentially orders of magnitude greater surface activity compared to similar single unit molecules. A cationic Gemini surfactant (Propyl didodecyldimethylammonium Bromide, PDDDAB) and a conventional cationic surfactant (Dodecyltrimethylammonium Bromide, DTAB) were used to pre-treat and generate activated carbon. The removal efficiency of the surfactant-modified activated carbon through adsorption of chromium(VI) was investigated under controlled laboratory conditions. Fourier-transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) were used to investigate the surface changes of surfactant-modified activated carbon. The effect of important parameters such as adsorbent dosage, pH, ionic strength and contact time were also investigated. The chromium(VI) was adsorbed more significantly on the Gemini surfactant-modified activated carbon than on the conventional surfactant-modified activated carbon. The correlation coefficients show the data best fit the Freundlich model, which confirms the monolayer adsorption of chromium(VI) onto Gemini surfactant-modified activated carbon. From this assessment, the surfactant-modified (especially Gemini surfactant-modified) activated carbon in this study showed promise for practical applications to treat water pollution.http://www.mdpi.com/2073-4441/10/1/91Gemini surfactantmodificationchromium(VI)adsorptionactivated carbon |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yingying Zhou Zhenghua Wang Andrew Hursthouse Bozhi Ren |
spellingShingle |
Yingying Zhou Zhenghua Wang Andrew Hursthouse Bozhi Ren Gemini Surfactant-Modified Activated Carbon for Remediation of Hexavalent Chromium from Water Water Gemini surfactant modification chromium(VI) adsorption activated carbon |
author_facet |
Yingying Zhou Zhenghua Wang Andrew Hursthouse Bozhi Ren |
author_sort |
Yingying Zhou |
title |
Gemini Surfactant-Modified Activated Carbon for Remediation of Hexavalent Chromium from Water |
title_short |
Gemini Surfactant-Modified Activated Carbon for Remediation of Hexavalent Chromium from Water |
title_full |
Gemini Surfactant-Modified Activated Carbon for Remediation of Hexavalent Chromium from Water |
title_fullStr |
Gemini Surfactant-Modified Activated Carbon for Remediation of Hexavalent Chromium from Water |
title_full_unstemmed |
Gemini Surfactant-Modified Activated Carbon for Remediation of Hexavalent Chromium from Water |
title_sort |
gemini surfactant-modified activated carbon for remediation of hexavalent chromium from water |
publisher |
MDPI AG |
series |
Water |
issn |
2073-4441 |
publishDate |
2018-01-01 |
description |
Gemini surfactants, with double hydrophilic and hydrophobic groups, offer potentially orders of magnitude greater surface activity compared to similar single unit molecules. A cationic Gemini surfactant (Propyl didodecyldimethylammonium Bromide, PDDDAB) and a conventional cationic surfactant (Dodecyltrimethylammonium Bromide, DTAB) were used to pre-treat and generate activated carbon. The removal efficiency of the surfactant-modified activated carbon through adsorption of chromium(VI) was investigated under controlled laboratory conditions. Fourier-transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) were used to investigate the surface changes of surfactant-modified activated carbon. The effect of important parameters such as adsorbent dosage, pH, ionic strength and contact time were also investigated. The chromium(VI) was adsorbed more significantly on the Gemini surfactant-modified activated carbon than on the conventional surfactant-modified activated carbon. The correlation coefficients show the data best fit the Freundlich model, which confirms the monolayer adsorption of chromium(VI) onto Gemini surfactant-modified activated carbon. From this assessment, the surfactant-modified (especially Gemini surfactant-modified) activated carbon in this study showed promise for practical applications to treat water pollution. |
topic |
Gemini surfactant modification chromium(VI) adsorption activated carbon |
url |
http://www.mdpi.com/2073-4441/10/1/91 |
work_keys_str_mv |
AT yingyingzhou geminisurfactantmodifiedactivatedcarbonforremediationofhexavalentchromiumfromwater AT zhenghuawang geminisurfactantmodifiedactivatedcarbonforremediationofhexavalentchromiumfromwater AT andrewhursthouse geminisurfactantmodifiedactivatedcarbonforremediationofhexavalentchromiumfromwater AT bozhiren geminisurfactantmodifiedactivatedcarbonforremediationofhexavalentchromiumfromwater |
_version_ |
1725802512021192704 |