دورية أكاديمية
Nanoscale Insights into the Interaction Mechanism Underlying the Adsorption and Retention of Heavy Metal Ions by Humic Acid
| العنوان: | Nanoscale Insights into the Interaction Mechanism Underlying the Adsorption and Retention of Heavy Metal Ions by Humic Acid |
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| المؤلفون: | Zhoujie Wang, Qiuyi Lu, Chaopeng Liu, Huadong Tian, Jingyi Wang, Lei Xie, Qi Liu, Hongbo Zeng |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Biochemistry, Cell Biology, Molecular Biology, Ecology, Developmental Biology, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, weak hydrogen bonds, quartz crystal microbalance, heavy metal ions, e ., cd, anions could form, 26 /∼ 1, 05 /∼ 4, 02 nmol cm, strong adhesion stems, similar adhesion energies, ii )/ cd, two ha surfaces, interaction mechanism underlying, ii ), arsenate, hms biogeochemical cycling, v )/ cr, pb, v ), interaction mechanism, adhesion energy |
| الوصف: | The mobility and distribution of heavy metal ions (HMs) in aquatic environments are significantly influenced by humic acid (HA), which is ubiquitous. A quantitative understanding of the interaction mechanism underlying the adsorption and retention of HMs by HA is of vital significance but remains elusive. Herein, the interaction mechanism between HA and different types of HMs (i.e., Cd(II), Pb(II), arsenate, and chromate) was quantitatively investigated at the nanoscale. Based on quartz crystal microbalance with dissipation tests, the adsorption capacities of Pb(II), Cd(II), As(V), and Cr(VI) ionic species on the HA surface were measured as ∼0.40, ∼0.25, ∼0.12, and ∼0.02 nmol cm –2 , respectively. Atomic force microscopy force results showed that the presence of Pb(II)/Cd(II) cations suppressed the electrostatic double-layer repulsion during the approach of two HA surfaces and the adhesion energy during separation was considerably enhanced from ∼2.18 to ∼5.05/∼4.18 mJ m –2 . Such strong adhesion stems from the synergistic metal–HA complexation and cation−π interaction, as evidenced by spectroscopic analysis and theoretical simulation. In contrast, As(V)/Cr(VI) oxo-anions could form only weak hydrogen bonds with HA, resulting in similar adhesion energies for HA–HA (∼2.18 mJ m –2 ) and HA–As(V)/Cr(VI)–HA systems (∼2.26/∼1.96 mJ m –2 ). This work provides nanoscale insights into quantitative HM–HA interactions, improving the understanding of HMs biogeochemical cycling. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| العلاقة: | https://figshare.com/articles/journal_contribution/Nanoscale_Insights_into_the_Interaction_Mechanism_Underlying_the_Adsorption_and_Retention_of_Heavy_Metal_Ions_by_Humic_Acid/25039669Test |
| DOI: | 10.1021/acs.est.3c08309.s001 |
| الإتاحة: | https://doi.org/10.1021/acs.est.3c08309.s001Test https://figshare.com/articles/journal_contribution/Nanoscale_Insights_into_the_Interaction_Mechanism_Underlying_the_Adsorption_and_Retention_of_Heavy_Metal_Ions_by_Humic_Acid/25039669Test |
| حقوق: | CC BY-NC 4.0 |
| رقم الانضمام: | edsbas.CB5ED88A |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acs.est.3c08309.s001 |
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