التفاصيل البيبلوغرافية
| العنوان: |
A Sulfonated All-Aromatic Polyamide for Heavy Metal Capture: A Model Study with Pb(II) |
| المؤلفون: |
Anna C. Fraser (13171259), Jacob Yankey (14289462), Orlando Coronell (1506148), Theo J. Dingemans (1611232) |
| سنة النشر: |
2022 |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Neuroscience, Physiology, Biotechnology, Geology, Immunology, Cancer, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, ion exchange capacity, heavy metal removal, heavy metal capture, ∼ 500 mg, styrene sulfonate, freundlich adsorption models, accurately predicted using, polymer backbone play, 2 ′- disulfonyl, iec ), found, using lead, sulfonate groups, freundlich model, 410 mg, pbdi ), widely used, r <, polymers precipitate, polymer prior |
| الوصف: |
Polyelectrolytes are widely used in heavy metal removal, finding applications as coagulants and flocculants. We compare the heavy metal removal capability of a water-soluble sulfonated semirigid polyamide, poly(2,2′-disulfonyl-4,4′-benzidine isophthalamide) (PBDI), with that of a well-known random-coil polymer, poly(sodium 4-styrenesulfonate) (PSS). Using lead (Pb(II)) as a model contaminant, both polymers precipitate out from solution at ∼500 mg/L Pb(II) in water. The ability to remove Pb(II) from water was quantified using adsorption isotherms and fitted with Langmuir and Freundlich adsorption models. The sorption of Pb(II) by PSS fit the Langmuir model with a high degree of correlation (0.976 R 2 ), but the sorption of Pb(II) by PBDI could not be accurately predicted using the Langmuir or Freundlich model. The sorption of Pb(II) by PBDI and PSS was compared by normalizing sorption by the number of sulfonate groups of each polymer and the ion exchange capacity (IEC), found by titration. We find that PBDI removes a greater amount of Pb(II) per gram of sorbent compared to PSS, 410 mg/g vs 260 mg/g, respectively, which cannot be accounted for by differences in IEC or number of sulfonate groups. Our findings confirm that the positioning of the sulfonate groups and the rigidity of the polymer backbone play an important role in how Pb(II) coordinates to the polymer prior to precipitating out from solution. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/A_Sulfonated_All-Aromatic_Polyamide_for_Heavy_Metal_Capture_A_Model_Study_with_Pb_II_/21763749 |
| DOI: |
10.1021/acsapm.2c01796.s001 |
| الاتاحة: |
https://doi.org/10.1021/acsapm.2c01796.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.9F7C2862 |
| قاعدة البيانات: |
BASE |