| id |
ndltd-OhioLink-oai-etd.ohiolink.edu-osu1302190533
|
| record_format |
oai_dc
|
| spelling |
ndltd-OhioLink-oai-etd.ohiolink.edu-osu13021905332021-08-03T06:02:13Z Adsorption of (poly)maleic acid and aquatic fulvic accids by goethite Wang, Lili <p>The adsorption characteristics of a synthetic organic polymer - polymaleic acid (PMA) and Suwannee River fulvic acid (SRFA) by goethite was studied. The adsorption density of the sorbates decreased with increasing pH and the data could best be described by the Langmuir adsorption equation. Fractionation of SRFA occurred where decreases in the weight- and number- average molecular weights, <i>M<sub>w</sub></i> and <i>M<sub>n</sub></i>, of the target substance in the solution phase was observed after adsorption by goethite. Fractionation of PMA after adsorption, however, did not occur to the same extent relative to SRFA. UV molar absorptivities measured at 280 nm also decreased, which suggests that the more aromatic moieties are preferentially adsorbed. Potentiometric titrations conducted on SRFA revealed changes in the conditional acidity constants (pK<sub>a</sub>) of the fulvic acid after adsorption. The increased conditional pK<sub>a</sub> value of the humic material remaining in the solution after adsorption implies that the strongly sorbing compounds possessed stronger acidic functional groups. The experimental results confirm that molecular weight, aromatic content, and organic acidity are major factors controlling the fractionation of natural organic matter (NOM) by adsorption onto hydrous mineral oxides.</p> 1996 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1302190533 http://rave.ohiolink.edu/etdc/view?acc_num=osu1302190533 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
|
| collection |
NDLTD
|
| language |
English
|
| sources |
NDLTD
|
| author |
Wang, Lili
|
| spellingShingle |
Wang, Lili
Adsorption of (poly)maleic acid and aquatic fulvic accids by goethite
|
| author_facet |
Wang, Lili
|
| author_sort |
Wang, Lili
|
| title |
Adsorption of (poly)maleic acid and aquatic fulvic accids by goethite
|
| title_short |
Adsorption of (poly)maleic acid and aquatic fulvic accids by goethite
|
| title_full |
Adsorption of (poly)maleic acid and aquatic fulvic accids by goethite
|
| title_fullStr |
Adsorption of (poly)maleic acid and aquatic fulvic accids by goethite
|
| title_full_unstemmed |
Adsorption of (poly)maleic acid and aquatic fulvic accids by goethite
|
| title_sort |
adsorption of (poly)maleic acid and aquatic fulvic accids by goethite
|
| publisher |
The Ohio State University / OhioLINK
|
| publishDate |
1996
|
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=osu1302190533
|
| work_keys_str_mv |
AT wanglili adsorptionofpolymaleicacidandaquaticfulvicaccidsbygoethite
|
| _version_ |
1719429828710498304
|
