1
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Zhu Y, Wang B, Farooq U, Li Y, Qi Z, Zhang Q. Effects of surfactants on the adsorption of norfloxacin onto ferrihydrite: comparison between anionic and cationic surfactants. ENVIRONMENTAL TECHNOLOGY 2024:1-11. [PMID: 38770654 DOI: 10.1080/09593330.2024.2354056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Accepted: 05/02/2024] [Indexed: 05/22/2024]
Abstract
There is little information on how widespread surfactants affect the adsorption of norfloxacin (NOR) onto iron oxide minerals. In order to elucidate the effects of various surfactants on the adsorption characteristics of NOR onto typical iron oxides, we have explored the different influences of sodium dodecylbenzene sulfonate (SDBS), an anionic surfactant, and didodecyldimethylammonium bromide (DDAB), a cationic surfactant, on the interactions between NOR and ferrihydrite under different solution chemistry conditions. Interestingly, SDBS facilitated NOR adsorption, whereas DDAB inhibited NOR adsorption. The adsorption-enhancement effect of SDBS was ascribed to the enhanced electrostatic attraction, the interactions between the adsorbed SDBS on ferrihydrite surfaces and NOR molecules, and the bridging effect of SDBS between NOR and iron oxide. In comparison, the adsorption-inhibition effect of DDAB owning to the adsorption site competitive adsorption between NOR and DDAB for the effective sites as well as the steric hindrance between NOR-DDAB complexes and the adsorbed DDAB on ferrihydrite surfaces. Additionally, the magnitude of the effects of surfactants on NOR adsorption declined with increasing pH values from 5.0 to 9.0, which was related to the amounts of surfactant binding to ferrihydrite surfaces. Moreover, when the background electrolyte was Ca2+, the enhanced effect of SDBS on NOR adsorption was caused by the formation of NOR-Ca2+-SDBS complexes. The inhibitory effect of DDAB was due to the DDAB coating on ferrihydrite, which undermined the cation-bridging effect. Together, the findings from this work emphasize the essential roles of widely existing surfactants in controlling the environmental fate of quinolone antibiotics.
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Affiliation(s)
- Yuwei Zhu
- Ecology Institute of the Shandong academy of sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan, People's Republic of China
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People's Republic of China
| | - Bin Wang
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People's Republic of China
| | - Usman Farooq
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People's Republic of China
| | - Yanxiang Li
- The Testing Center of Shandong Bureau of China Metallurgical Geology Bureau, Jinan, People's Republic of China
| | - Zhichong Qi
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, People's Republic of China
| | - Qiang Zhang
- Ecology Institute of the Shandong academy of sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan, People's Republic of China
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2
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Sengupta S, Versluis J, Bakker HJ. Observation of a Two-Dimensional Hydrophobic Collapse at the Surface of Water Using Heterodyne-Detected Surface Sum-Frequency Generation. J Phys Chem Lett 2023; 14:9285-9290. [PMID: 37815274 PMCID: PMC10591499 DOI: 10.1021/acs.jpclett.3c01530] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 10/04/2023] [Indexed: 10/11/2023]
Abstract
We study the effect of sodium chloride (NaCl) on the properties of the interface of water and the surfactant dodecyl sulfate (DS-) using heterodyne-detected vibrational sum-frequency generation spectroscopy. We find that the signal of the O-H stretch vibrations of oriented water molecules at the interface is highly nonlinearly dependent on the NaCl concentration. This nonlinear dependence is explained by a combination of screening of the electric field of surface-bound DS- ions pointing into the bulk and screening of the Coulomb repulsion between the headgroups of the DS- ions in the surface plane. The latter effect strongly increases the oriented water signal within a limited NaCl concentration range of 10-100 mM, indicating a two-dimensional hydrophobic collapse of the surfactant layer. The occurrence of collapse is supported by model calculations of the surface potential and surface surfactant density.
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Affiliation(s)
| | - Jan Versluis
- AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
| | - Huib J. Bakker
- AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands
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3
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Dai C, Shen H, Duan Y, You X, Lai X, Liu S, Zhang Y, Hon LK, Baek K, Tu Y, Zhou L, Xu D. Transport of TiO 2 and CeO 2 nanoparticles in saturated porous media in the presence of surfactants with environmentally relevant concentrations. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:9306-9317. [PMID: 34505247 DOI: 10.1007/s11356-021-16266-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 08/26/2021] [Indexed: 06/13/2023]
Abstract
Nanomaterials are threatening the environment and human health, but there has been little discussion about the stability and mobility of nanoparticles (NPs) in saturated porous media at environmentally relevant concentrations of surfactants, which is a knowledge gap in exploring the fate of engineered NPs in groundwater. Therefore, the influences of the anionic surfactant (sodium dodecylbenzene sulfonate, SDBS), the cationic surfactant (cetyltrimethylammonium bromide, CTAB), and the nonionic surfactant (Tween-80) with environmentally relevant concentrations of 0, 5, 10, and 20 mg/L on nano-TiO2 (nTiO2, negatively charged) and nano-CeO2 (nCeO2, positively charged) transport through saturated porous media were examined by column experiments. On the whole, with increasing SDBS concentration from 0 to 20 mg/L, the concentration peak of nTiO2 and nCeO2 in effluents increased by approximately 0.2 and 0.3 (dimensionless concentration, C/C0), respectively, because of enhanced stability and reduced aggregate size resulting from enhanced electrostatic and steric repulsions. By contrast, the transportability of NPs significantly decreased with increasing CTAB concentration due to the attachment of positive charges, which was opposite to the charge on the medium surface and facilitated the NP deposition. On the other hand, the addition of Tween-80 had no significant influence on the stability and mobility of nTiO2 and nCeO2. The results were also demonstrated by the colloid filtration theory (CFT) modeling and the Derjaguin-Landau-Verwey-Overbeek (DLVO) interaction calculations; it might promote the assessment and remediation of NP pollution in subsurface environments.
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Affiliation(s)
- Chaomeng Dai
- College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China
| | - Hui Shen
- College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China
| | - Yanping Duan
- School of Environmental and Geographical Sciences, Shanghai Normal University, 100 Guilin Rd., Shanghai, 200234, People's Republic of China.
- Institute of Urban Studies, Shanghai Normal University, 100 Guilin Road, Shanghai, 200234, China.
- Yangtze Delta Wetland Ecosystem National Filed Scientific Observation and Research Station, Shanghai, People's Republic of China.
| | - Xueji You
- College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China.
- Department of Civil, Architectural, and Environmental Engineering, The University of Texas at Austin, 301 E. Dean Keeton St., Stop C1786, Austin, TX, 78712, USA.
| | - Xiaoying Lai
- College of Management and Economics, Tianjin University, Tianjin, 300072, People's Republic of China
| | - Shuguang Liu
- College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China
| | - Yalei Zhang
- College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, People's Republic of China
| | - Leong Kah Hon
- Fac Engn & Green Technol, Dept Environm Engn, Univ Tunku Abdul Rahman, 31900, Kampar, Perak, Malaysia
| | - Kitae Baek
- Department of Environment & Energy and Soil Environment Research Center, Jeonbuk National University, Jeonju, Jeollabukdo, 57896, Republic of Korea
| | - Yaojen Tu
- School of Environmental and Geographical Sciences, Shanghai Normal University, 100 Guilin Rd., Shanghai, 200234, People's Republic of China
| | - Lang Zhou
- Department of Civil, Architectural, and Environmental Engineering, The University of Texas at Austin, 301 E. Dean Keeton St., Stop C1786, Austin, TX, 78712, USA
| | - Di Xu
- School of Environmental and Geographical Sciences, Shanghai Normal University, 100 Guilin Rd., Shanghai, 200234, People's Republic of China
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4
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Sun G, Fu F, Yu G, Yu P, Tang B. Migration behavior of Cr(VI) during the transformation of ferrihydrite-Cr(VI) co-precipitates: The interaction between surfactants and co-precipitates. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 767:145429. [PMID: 33550060 DOI: 10.1016/j.scitotenv.2021.145429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 01/04/2021] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
Redistribution of Cr(VI) in ferrihydrite-Cr(VI) co-precipitates (Fh-Cr) was affected by co-precipitates transformation and coexisting substances. These effects were crucial for predicting the migration path of Cr(VI) in ferrihydrite-Cr(VI) co-precipitates. This work investigated the effects of the extensively used surfactants of anionic surfactant sodium dodecylbenzene sulfonate (SDBS) and cationic surfactant cetyltrimethylammonium bromide (CTAB) on the Fh-Cr transformation and redistribution of Cr(VI) for 10 days at different pH values (5.0, 7.5 and 9.0) and concentration of surfactants (0.5, 2.0 and 5.0 mM). The results showed that SDBS hindered the transformation of Fh-Cr to hematite and tended to transform into goethite. SDBS inhibited hematite formation by inhibiting the aggregation of Fh-Cr particles, and it enhanced the dissolution of Fh-Cr to facilitate the formation of goethite. Affected by the inhibition of Fh-Cr transformation, the process of Cr(VI) redistribution was delayed. CTAB did not affect the transformation of Fh-Cr, but allowed more Cr(VI) to enter the interior of iron minerals. When the surfactants were adsorbed on the Fh-Cr, SDBS decreased the adsorption of Cr(VI) by Fh-Cr, while CTAB increased the Cr(VI) adsorption. The findings of this study contribute to understand the effects of surfactants on the transformation of Fh-Cr and the behaviors of Cr(VI) during this process.
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Affiliation(s)
- Guangzhao Sun
- School of Environmental Science and Engineering, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Fenglian Fu
- School of Environmental Science and Engineering, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Guangda Yu
- School of Environmental Science and Engineering, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Peijing Yu
- School of Environmental Science and Engineering, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Bing Tang
- School of Environmental Science and Engineering, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong University of Technology, Guangzhou 510006, China
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5
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Cao J, Huang J, Dong H, Li J, Shou J, Li Y. Effects of surfactants on the removal of nitrobenzene by Fe(II) sorbed on goethite. J Colloid Interface Sci 2019; 552:764-770. [DOI: 10.1016/j.jcis.2019.05.095] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/27/2019] [Accepted: 05/28/2019] [Indexed: 12/26/2022]
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6
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Torres MA, Dong S, Nealson KH, West AJ. The kinetics of siderophore-mediated olivine dissolution. GEOBIOLOGY 2019; 17:401-416. [PMID: 30734464 DOI: 10.1111/gbi.12332] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 12/18/2018] [Accepted: 01/05/2019] [Indexed: 05/28/2023]
Abstract
Silicate minerals represent an important reservoir of nutrients at Earth's surface and a source of alkalinity that modulates long-term geochemical cycles. Due to the slow kinetics of primary silicate mineral dissolution and the potential for nutrient immobilization by secondary mineral precipitation, the bioavailability of many silicate-bound nutrients may be limited by the ability of micro-organisms to actively scavenge these nutrients via redox alteration and/or organic ligand production. In this study, we use targeted laboratory experiments with olivine and the siderophore deferoxamine B to explore how microbial ligands affect nutrient (Fe) release and the overall rate of mineral dissolution. Our results show that olivine dissolution rates are accelerated in the presence of micromolar concentrations of deferoxamine B. Based on the non-linear decrease in rates with time and formation of a Fe3+ -ligand complex, we attribute this acceleration in dissolution rates to the removal of an oxidized surface coating that forms during the dissolution of olivine at circum-neutral pH in the presence of O2 and the absence of organic ligands. While increases in dissolution rates are observed with micromolar concentrations of siderophores, it remains unclear whether such conditions could be realized in natural environments due to the strong physiological control on microbial siderophore production. So, to contextualize our experimental results, we also developed a feedback model, which considers how microbial physiology and ligand-promoted mineral dissolution kinetics interact to control the extent of biotic enhancement of dissolution rates expected for different environments. The model predicts that physiological feedbacks severely limit the extent to which dissolution rates may be enhanced by microbial activity, though the rate of physical transport modulates this limitation.
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Affiliation(s)
- Mark A Torres
- Department of Earth Sciences, University of Southern California, Los Angeles, California
| | - Sijia Dong
- Department of Earth Sciences, University of Southern California, Los Angeles, California
| | - Kenneth H Nealson
- Department of Earth Sciences, University of Southern California, Los Angeles, California
| | - A Joshua West
- Department of Earth Sciences, University of Southern California, Los Angeles, California
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7
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Kurth C, Kage H, Nett M. Siderophores as molecular tools in medical and environmental applications. Org Biomol Chem 2016; 14:8212-27. [PMID: 27492756 DOI: 10.1039/c6ob01400c] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Almost all life forms depend on iron as an essential micronutrient that is needed for electron transport and metabolic processes. Siderophores are low-molecular-weight iron chelators that safeguard the supply of this important metal to bacteria, fungi and graminaceous plants. Although animals and the majority of plants do not utilise siderophores and have alternative means of iron acquisition, siderophores have found important clinical and agricultural applications. In this review, we will highlight the different uses of these iron-chelating molecules.
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Affiliation(s)
- Colette Kurth
- Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Adolf-Reichwein-Str. 23, D-07745 Jena, Germany
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8
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Wang Z, Schenkeveld WDC, Kraemer SM, Giammar DE. Synergistic effect of reductive and ligand-promoted dissolution of goethite. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:7236-7244. [PMID: 25965980 DOI: 10.1021/acs.est.5b01191] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Ligand-promoted dissolution and reductive dissolution of iron (hydr)oxide minerals control the bioavailability of iron in many environmental systems and have been recognized as biological iron acquisition strategies. This study investigated the potential synergism between ligands (desferrioxamine B (DFOB) or N,N'-Di(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid (HBED)) and a reductant (ascorbate) in goethite dissolution. Batch experiments were performed at pH 6 with ligand or reductant alone and in combination, and under both oxic and anoxic conditions. Goethite dissolution in the presence of reductant or ligand alone followed classic surface-controlled dissolution kinetics. Ascorbate alone does not promote goethite dissolution under oxic conditions due to rapid reoxidation of Fe(II). The rate coefficients for goethite dissolution by ligands are closely correlated with the stability constants of the aqueous Fe(III)-ligand complexes. A synergistic effect of DFOB and ascorbate on the rate of goethite dissolution was observed (total rates greater than the sum of the individual rates), and this effect was most pronounced under oxic conditions. For HBED, macroscopically the synergistic effect was hidden due to the inhibitory effect of ascorbate on HBED adsorption. After accounting for the concentrations of adsorbed ascorbate and HBED, a synergistic effect could still be identified. The potential synergism between ligand and reductant for iron (hydr)oxide dissolution may have important implications for iron bioavailability in soil environments.
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Affiliation(s)
- Zimeng Wang
- †Department of Civil and Environmental Engineering, Stanford University, Stanford, California 94305, United States
| | | | - Stephan M Kraemer
- ‡Department of Environmental Geosciences, University of Vienna, 1010 Vienna, Austria
| | - Daniel E Giammar
- §Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States
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9
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Schenkeveld WDC, Schindlegger Y, Oburger E, Puschenreiter M, Hann S, Kraemer SM. Geochemical processes constraining iron uptake in Strategy II Fe acquisition. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:12662-70. [PMID: 25275965 PMCID: PMC4224094 DOI: 10.1021/es5031728] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Phytosiderophores (PS) are natural chelating agents, exuded by graminaceous plants (grasses) for the purpose of Fe acquisition (Strategy II). They can form soluble Fe complexes with soil-Fe that can be readily taken up. PS are exuded in a diurnal pulse release, and with the start of PS release a "window of iron uptake" opens. In the present study we examined how this window is constrained in time and concentration by biogeochemical processes. For this purpose, a series of interaction experiments was done with a calcareous clay soil and the phytosiderophore 2'-deoxymugineic acid (DMA), in which metal and DMA speciation were examined as a function of time and DMA concentration. Various kinetically and thermodynamically controlled processes affected the size of the window of Fe uptake. Adsorption lowered, but did not prevent Fe mobilization by DMA. Microbial activity depleted DMA from solution, but not on time scales jeopardizing Strategy II Fe acquisition. Complexation of competing metals played an important role in constraining the window of Fe uptake, particularly at environmentally relevant PS concentrations. Our study provides a conceptual model that takes into account the chemical kinetics involved with PS-mediated Fe acquisition. The model can help to explain how success or failure of PS-mediated Fe acquisition depends on environmental conditions.
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Affiliation(s)
- W. D. C. Schenkeveld
- Department
of Environmental Geosciences, University
of Vienna, Althanstraße
14 (UZA II) 1090 Vienna, Austria
- Phone: +43-1-4277-531 42; fax: +43 (1) 4277
9533; e-mail:
| | - Y. Schindlegger
- Department
of Chemistry, University of Natural Resources
and Life Sciences, Muthgasse
18 1190 Vienna, Austria
| | - E. Oburger
- Department
of Forest and Soil Sciences, University
of Natural Resources and Life Sciences, Konrad Lorenz Strasse 24 3430 Tulln, Austria
| | - M. Puschenreiter
- Department
of Forest and Soil Sciences, University
of Natural Resources and Life Sciences, Konrad Lorenz Strasse 24 3430 Tulln, Austria
| | - S. Hann
- Department
of Chemistry, University of Natural Resources
and Life Sciences, Muthgasse
18 1190 Vienna, Austria
| | - S. M. Kraemer
- Department
of Environmental Geosciences, University
of Vienna, Althanstraße
14 (UZA II) 1090 Vienna, Austria
- Phone: +43-1-4277-534
63; fax: +43 (1) 4277 9533; e-mail:
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10
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Transport of fluorescently labeled hydroxyapatite nanoparticles in saturated granular media at environmentally relevant concentrations of surfactants. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.05.041] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Gao J, Ye K, Yang L, Xiong WW, Ye L, Wang Y, Zhang Q. Growing Crystalline Zinc-1,3,5-benzenetricarboxylate Metal–Organic Frameworks in Different Surfactants. Inorg Chem 2013; 53:691-3. [DOI: 10.1021/ic402692p] [Citation(s) in RCA: 152] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Junkuo Gao
- School of Materials
Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
- College of Materials
and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Kaiqi Ye
- State Key Laboratory of Supramolecular
Structure and Materials, Jilin University, Changchun 130012, China
| | - Ling Yang
- School of Materials
Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Wei-Wei Xiong
- School of Materials
Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Ling Ye
- State Key Laboratory of Supramolecular
Structure and Materials, Jilin University, Changchun 130012, China
| | - Yue Wang
- State Key Laboratory of Supramolecular
Structure and Materials, Jilin University, Changchun 130012, China
| | - Qichun Zhang
- School of Materials
Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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12
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Gao J, He M, Lee ZY, Cao W, Xiong WW, Li Y, Ganguly R, Wu T, Zhang Q. A surfactant-thermal method to prepare four new three-dimensional heterometal–organic frameworks. Dalton Trans 2013; 42:11367-70. [DOI: 10.1039/c3dt51103k] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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13
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Dash U, Misra PK. Organization of amphiphiles. J Colloid Interface Sci 2011; 357:407-18. [DOI: 10.1016/j.jcis.2011.01.087] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 01/22/2011] [Accepted: 01/25/2011] [Indexed: 11/16/2022]
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14
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Dissolution kinetics and mechanism of Mg–Al layered double hydroxides: A simple approach to describe drug release in acid media. J Colloid Interface Sci 2010; 351:134-9. [DOI: 10.1016/j.jcis.2010.07.053] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Revised: 07/21/2010] [Accepted: 07/21/2010] [Indexed: 11/18/2022]
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15
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Adsorption of sodium dodecyl sulfate (SDS) at ZnSe and α-Fe2O3 surfaces: Combining infrared spectroscopy and batch uptake studies. J Colloid Interface Sci 2010; 348:167-76. [DOI: 10.1016/j.jcis.2010.04.011] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 04/07/2010] [Accepted: 04/07/2010] [Indexed: 11/20/2022]
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16
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Carrasco N, Kretzschmar R, Xu J, Kraemer SM. Adsorption of hydroxamate siderophores and EDTA on goethite in the presence of the surfactant sodium dodecyl sulfate. GEOCHEMICAL TRANSACTIONS 2009; 10:5. [PMID: 19523232 PMCID: PMC2706842 DOI: 10.1186/1467-4866-10-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2008] [Accepted: 06/13/2009] [Indexed: 05/06/2023]
Abstract
Siderophore-promoted iron acquisition by microorganisms usually occurs in the presence of other organic molecules, including biosurfactants. We have investigated the influence of the anionic surfactant sodium dodecyl sulfate (SDS) on the adsorption of the siderophores DFOB (cationic) and DFOD (neutral) and the ligand EDTA (anionic) onto goethite (alpha-FeOOH) at pH 6. We also studied the adsorption of the corresponding 1:1 Fe(III)-ligand complexes, which are products of the dissolution process. Adsorption of the two free siderophores increased in a similar fashion with increasing SDS concentration, despite their difference in molecule charge. In contrast, SDS had little effect on the adsorption of EDTA. Adsorption of the Fe-DFOB and Fe-DFOD complexes also increased with increasing SDS concentrations, while adsorption of Fe-EDTA decreased. Our results suggest that hydrophobic interactions between adsorbed surfactants and siderophores are more important than electrostatic interactions. However, for strongly hydrophilic molecules, such as EDTA and its iron complex, the influence of SDS on their adsorption seems to depend on their tendency to form inner-sphere or outer-sphere surface complexes. Our results demonstrate that surfactants have a strong influence on the adsorption of siderophores to Fe oxides, which has important implications for siderophore-promoted dissolution of iron oxides and biological iron acquisition.
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Affiliation(s)
- Naraya Carrasco
- Institute of Biogeochemistry and Pollutant Dynamics, Department of Environmental Sciences, ETH Zurich, CHN, CH-8092 Zurich, Switzerland
| | - Ruben Kretzschmar
- Institute of Biogeochemistry and Pollutant Dynamics, Department of Environmental Sciences, ETH Zurich, CHN, CH-8092 Zurich, Switzerland
| | - Jide Xu
- Chemistry Department, University of California, Berkeley, California, 94720-1460, USA
| | - Stephan M Kraemer
- Institute of Biogeochemistry and Pollutant Dynamics, Department of Environmental Sciences, ETH Zurich, CHN, CH-8092 Zurich, Switzerland
- Department of Environmental Geosciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
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17
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Shi L, Ghezzi M, Caminati G, Lo Nostro P, Grady BP, Striolo A. Adsorption isotherms of aqueous C12E6 and cetyltrimethylammonium bromide surfactants on solid surfaces in the presence of low molecular weight coadsorbents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:5536-5544. [PMID: 19382783 DOI: 10.1021/la8041988] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this work, we evaluate the effects of the low molecular weight compounds toluene, phenol, and 1-hexanol on the adsorption of two surfactants on one solid surface. The surfactants are cetyltrimethylammonium bromide (CTAB, cationic) and hexaethylene glycol monododecyl ether (C12E6, nonionic). The surface is gold, although X-ray photoelectron spectroscopic analysis reveals the presence of a large number of oxygenated sites that render the surface hydrophilic (contact angle 10 degrees). Adsorption isotherms are measured using a quartz crystal microbalance with dissipation monitoring (QCM-D). Although our measurements do not allow the determination of the morphology of the aggregates directly, we rationalize our results by referring to AFM images from the literature. On the basis of primarily the dissipative signal and on AFM studies done by others, our results are consistent with CTAB forming a patchy cylindrical structure and C12E6 likely yielding a monolayer structure. The presence of cosolutes almost doubles the mass of surface aggregates and increases the rigidness of the aggregates for CTAB, consistent with a morphological change from cylinders to flat bilayers. Part of the increase in adsorbed mass is likely due to increased surface area covered by admicelles. For C12E6, cosolutes cause small changes in the mass adsorption and essentially no change in the flexibility of surface aggregates.
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Affiliation(s)
- Liu Shi
- School of Chemical, Biological and Materials Engineering, Institute for Applied Surfactant Research, University of Oklahoma, Norman, OK 73019, USA
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Duckworth OW, Bargar JR, Sposito G. Coupled biogeochemical cycling of iron and manganese as mediated by microbial siderophores. Biometals 2009; 22:605-13. [PMID: 19238560 DOI: 10.1007/s10534-009-9220-9] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Accepted: 02/04/2009] [Indexed: 11/27/2022]
Abstract
Siderophores, biogenic chelating agents that facilitate Fe(III) uptake through the formation of strong complexes, also form strong complexes with Mn(III) and exhibit high reactivity with Mn (hydr)oxides, suggesting a pathway by which Mn may disrupt Fe uptake. In this review, we evaluate the major biogeochemical mechanisms by which Fe and Mn may interact through reactions with microbial siderophores: competition for a limited pool of siderophores, sorption of siderophores and metal-siderophore complexes to mineral surfaces, and competitive metal-siderophore complex formation through parallel mineral dissolution pathways. This rich interweaving of chemical processes gives rise to an intricate tapestry of interactions, particularly in respect to the biogeochemical cycling of Fe and Mn in marine ecosystems.
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Affiliation(s)
- Owen W Duckworth
- Department of Soil Science, North Carolina State University, Raleigh, 27695-7619, USA.
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Effects of anionic surfactants on ligand-promoted dissolution of iron and aluminum hydroxides. J Colloid Interface Sci 2008; 321:279-87. [DOI: 10.1016/j.jcis.2008.02.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2007] [Revised: 02/07/2008] [Accepted: 02/08/2008] [Indexed: 11/22/2022]
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