Effect of Soil Organic Matter and Humates on Adsorption and Desorption Chemistry of Iodide in an Aridisol
The translocation of iodine (I) from soil to food chain is largely determined by its adsorption/desorption reaction in soils. In this study, the effects of commercial humates (HA) applied on an Aridisol and indigenous soil organic matter (SOM) on the adsorption and desorption of iodide were investig...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Ankara University
2020-12-01
|
| Series: | Journal of Agricultural Sciences |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/download/article-file/453032 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850228642314977280 |
|---|---|
| author | Muhittin Onur Akça Sadık Usta Mehmet Keçeci Veli Uygur |
| author_facet | Muhittin Onur Akça Sadık Usta Mehmet Keçeci Veli Uygur |
| author_sort | Muhittin Onur Akça |
| collection | DOAJ |
| description | The translocation of iodine (I) from soil to food chain is largely determined by its adsorption/desorption reaction in soils. In this study, the effects of commercial humates (HA) applied on an Aridisol and indigenous soil organic matter (SOM) on the adsorption and desorption of iodide were investigated. For this reason, 1% and 3% HA (w/w) were incorporated into the whole soil (WS) and organic matter free (OMF) soil samples. Then soil samples were equilibrated with 0, 2, 4, 6, 8 and 10 mg L-1 iodide solution prepared in 0.01 molar CaCl2 for 40 h. The sorption data were better described by Langmuir isotherm (R2= 0.938) than Freundlich isotherm (R2= 0.763). The Langmuir sorption maximum of WS was 19.8 mg kg-1. Freundlich isotherm parameters were n= 0.89 and Kf= 2.165. Sorption maximum of OMF soil significantly increased up to 35.5 mg kg-1. HA applications reduced iodide sorption maximum of both WS and organic OMF soil samples. Desorption rate of the WS ranged between 0-15.3% whereas it decreased 0-0.65% upon removal OM. HA treatments, in general, reduced the desorption rates. However, increasing HA application resulted in higher desorption ratio in both WS and OMF soils. Consequently, either SOM or HA has preeminent role in the adsorption-desorption chemistry in soils. |
| format | Article |
| id | doaj-art-da6f9971c31443359f0d48fe5bdd6db1 |
| institution | OA Journals |
| issn | 1300-7580 2148-9297 |
| language | English |
| publishDate | 2020-12-01 |
| publisher | Ankara University |
| record_format | Article |
| series | Journal of Agricultural Sciences |
| spelling | doaj-art-da6f9971c31443359f0d48fe5bdd6db12025-08-20T02:04:28ZengAnkara UniversityJournal of Agricultural Sciences1300-75802148-92972020-12-0126438038710.15832/ankutbd.41262845Effect of Soil Organic Matter and Humates on Adsorption and Desorption Chemistry of Iodide in an AridisolMuhittin Onur Akça0Sadık Usta1Mehmet Keçeci2Veli Uygur3Ankara University, Faculty of Agriculture, Department of Soil Science and Plant Nutrition, Ankara, TurkeyAnkara University, Faculty of Agriculture, Department of Soil Science and Plant Nutrition, Ankara, TurkeySoil, Fertilizer and Water Resources Central Research Institute, Ankara,TurkeySüleyman Demirel University, Faculty of Agriculture, Department of Soil Science and Plant Nutrition, Isparta, TurkeyThe translocation of iodine (I) from soil to food chain is largely determined by its adsorption/desorption reaction in soils. In this study, the effects of commercial humates (HA) applied on an Aridisol and indigenous soil organic matter (SOM) on the adsorption and desorption of iodide were investigated. For this reason, 1% and 3% HA (w/w) were incorporated into the whole soil (WS) and organic matter free (OMF) soil samples. Then soil samples were equilibrated with 0, 2, 4, 6, 8 and 10 mg L-1 iodide solution prepared in 0.01 molar CaCl2 for 40 h. The sorption data were better described by Langmuir isotherm (R2= 0.938) than Freundlich isotherm (R2= 0.763). The Langmuir sorption maximum of WS was 19.8 mg kg-1. Freundlich isotherm parameters were n= 0.89 and Kf= 2.165. Sorption maximum of OMF soil significantly increased up to 35.5 mg kg-1. HA applications reduced iodide sorption maximum of both WS and organic OMF soil samples. Desorption rate of the WS ranged between 0-15.3% whereas it decreased 0-0.65% upon removal OM. HA treatments, in general, reduced the desorption rates. However, increasing HA application resulted in higher desorption ratio in both WS and OMF soils. Consequently, either SOM or HA has preeminent role in the adsorption-desorption chemistry in soils.https://dergipark.org.tr/tr/download/article-file/453032humatesorganic matteriodideadsorptiondesorption |
| spellingShingle | Muhittin Onur Akça Sadık Usta Mehmet Keçeci Veli Uygur Effect of Soil Organic Matter and Humates on Adsorption and Desorption Chemistry of Iodide in an Aridisol Journal of Agricultural Sciences humates organic matter iodide adsorption desorption |
| title | Effect of Soil Organic Matter and Humates on Adsorption and Desorption Chemistry of Iodide in an Aridisol |
| title_full | Effect of Soil Organic Matter and Humates on Adsorption and Desorption Chemistry of Iodide in an Aridisol |
| title_fullStr | Effect of Soil Organic Matter and Humates on Adsorption and Desorption Chemistry of Iodide in an Aridisol |
| title_full_unstemmed | Effect of Soil Organic Matter and Humates on Adsorption and Desorption Chemistry of Iodide in an Aridisol |
| title_short | Effect of Soil Organic Matter and Humates on Adsorption and Desorption Chemistry of Iodide in an Aridisol |
| title_sort | effect of soil organic matter and humates on adsorption and desorption chemistry of iodide in an aridisol |
| topic | humates organic matter iodide adsorption desorption |
| url | https://dergipark.org.tr/tr/download/article-file/453032 |
| work_keys_str_mv | AT muhittinonurakca effectofsoilorganicmatterandhumatesonadsorptionanddesorptionchemistryofiodideinanaridisol AT sadıkusta effectofsoilorganicmatterandhumatesonadsorptionanddesorptionchemistryofiodideinanaridisol AT mehmetkececi effectofsoilorganicmatterandhumatesonadsorptionanddesorptionchemistryofiodideinanaridisol AT veliuygur effectofsoilorganicmatterandhumatesonadsorptionanddesorptionchemistryofiodideinanaridisol |