Influence of micelle properties on micellar-enhanced ultrafiltration for chromium recovery
An investigation of micelle properties on the recovery of chromium for micellar enhanced ultrafiltration (MEUF) process was conducted using cationic surfactant of cetyltrimethylammonium bromide (CTAB). The relationship between degree of ionization, micellar sizes and chromium removal were determined...
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| Định dạng: | Journal article |
| Ngôn ngữ: | English |
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2023
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| Truy cập trực tuyến: | https://scholar.dlu.edu.vn/handle/123456789/3024 https://doi.org/10.2166/wst.2015.370 |
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oai:scholar.dlu.edu.vn:123456789-30242023-09-28T06:34:32Z Influence of micelle properties on micellar-enhanced ultrafiltration for chromium recovery Nguyen Thi Hau Chang, Wen-Shing Nguyen Cong Nguyen Chen, Shiao-Shing Chang, Hau-Ming An investigation of micelle properties on the recovery of chromium for micellar enhanced ultrafiltration (MEUF) process was conducted using cationic surfactant of cetyltrimethylammonium bromide (CTAB). The relationship between degree of ionization, micellar sizes and chromium removal were determined in this study. The results showed that the complete ionization for CTA+ and Br− was observed for CTAB lower than 0.72 mM and aggregation initiated at concentration of CTAB higher than 0.72 mM to yield attraction of counterion. The micellar sizes increased with increase in concentration of CTAB (higher than 4.02 mM) to generate micron-sized micelles. The distribution of micellar sizes was used to estimate the molecular weight cutoff of membrane used in the MEUF process. As chromium was added into aqueous CTAB solution, the chromate was dominant and bound on the micellar surface instead of Br−. Moreover, the presence of micelle formed a gel-layer to slightly shrink the membrane pore, therefore, UF membrane of 30k Da molecular weight cutoff (pore size ≈ 7.9 nm) was selected in the MEUF process to achieve the removal efficiency of Cr(VI) higher than 95%. 2023-09-28T06:34:29Z 2023-09-28T06:34:29Z 2015-12-01 Journal article Bài báo đăng trên tạp chí thuộc ISI, bao gồm book chapter 0273-1223 https://scholar.dlu.edu.vn/handle/123456789/3024 10.2166/wst.2015.370 https://doi.org/10.2166/wst.2015.370 en |
| institution |
Thư viện Trường Đại học Đà Lạt |
| collection |
Thư viện số |
| language |
English |
| description |
An investigation of micelle properties on the recovery of chromium for micellar enhanced ultrafiltration (MEUF) process was conducted using cationic surfactant of cetyltrimethylammonium bromide (CTAB). The relationship between degree of ionization, micellar sizes and chromium removal were determined in this study. The results showed that the complete ionization for CTA+ and Br− was observed for CTAB lower than 0.72 mM and aggregation initiated at concentration of CTAB higher than 0.72 mM to yield attraction of counterion. The micellar sizes increased with increase in concentration of CTAB (higher than 4.02 mM) to generate micron-sized micelles. The distribution of micellar sizes was used to estimate the molecular weight cutoff of membrane used in the MEUF process. As chromium was added into aqueous CTAB solution, the chromate was dominant and bound on the micellar surface instead of Br−. Moreover, the presence of micelle formed a gel-layer to slightly shrink the membrane pore, therefore, UF membrane of 30k Da molecular weight cutoff (pore size ≈ 7.9 nm) was selected in the MEUF process to achieve the removal efficiency of Cr(VI) higher than 95%. |
| format |
Journal article |
| author |
Nguyen Thi Hau Chang, Wen-Shing Nguyen Cong Nguyen Chen, Shiao-Shing Chang, Hau-Ming |
| spellingShingle |
Nguyen Thi Hau Chang, Wen-Shing Nguyen Cong Nguyen Chen, Shiao-Shing Chang, Hau-Ming Influence of micelle properties on micellar-enhanced ultrafiltration for chromium recovery |
| author_facet |
Nguyen Thi Hau Chang, Wen-Shing Nguyen Cong Nguyen Chen, Shiao-Shing Chang, Hau-Ming |
| author_sort |
Nguyen Thi Hau |
| title |
Influence of micelle properties on micellar-enhanced ultrafiltration for chromium recovery |
| title_short |
Influence of micelle properties on micellar-enhanced ultrafiltration for chromium recovery |
| title_full |
Influence of micelle properties on micellar-enhanced ultrafiltration for chromium recovery |
| title_fullStr |
Influence of micelle properties on micellar-enhanced ultrafiltration for chromium recovery |
| title_full_unstemmed |
Influence of micelle properties on micellar-enhanced ultrafiltration for chromium recovery |
| title_sort |
influence of micelle properties on micellar-enhanced ultrafiltration for chromium recovery |
| publishDate |
2023 |
| url |
https://scholar.dlu.edu.vn/handle/123456789/3024 https://doi.org/10.2166/wst.2015.370 |
| _version_ |
1778792480583450624 |