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Bu Q, Cao H, Wu D, Zhou M. Sorption of Polycyclic Musks on Soil Components of Different Aggregate Sizes: The Effect of Organic Matter-Mineral Interactions. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2022; 109:417-423. [PMID: 35639119 DOI: 10.1007/s00128-022-03531-5] [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: 09/10/2021] [Accepted: 04/19/2022] [Indexed: 06/15/2023]
Abstract
Polycyclic musks (PCMs) in soils have been of increasing concern because of their potential characteristics of persistence, bioaccumulation, and ecological risk. However, little is known about their fate process in soil environment. Here, two PCMs namely galaxolide (HHCB) and tonalide (AHTN) were selected as sorbates to explore their sorption process in soils. Sorption batch experiments with six soils and their different aggregate fractions were carried out to elucidate the effect of organic matter-mineral interactions in different aggregate fractions on sorption of these two PCMs. The possible causes of variation in the organic carbon-normalized partition coefficient (Koc) for HHCB and AHTN have been investigated. The strong influence of organic matter-mineral interactions on Koc was evidenced by the large variation in Koc on HF-treatment for both bulk soils and their different aggregate fractions. This study verified the dual effect of organic matter-mineral interactions among selected soils, and in promoting or inhibiting sorption may be related to the types of organic matter-mineral interactions. There were also interactions between soil components with different aggregate sizes, which affected the variation of Koc in the bulk soil. This study represents a valuable contribution to the understanding of the fate processes and behaviors of HHCB and AHTN in soils and its implication on the risk assessment.
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Affiliation(s)
- Qingwei Bu
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing, 100083, People's Republic of China.
| | - Hongmei Cao
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing, 100083, People's Republic of China
| | - Dongkui Wu
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing, 100083, People's Republic of China
- State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China
| | - Ming Zhou
- School of Chemical & Environmental Engineering, China University of Mining & Technology-Beijing, Beijing, 100083, People's Republic of China
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2
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Novotny EH, Turetta APD, Resende MF, Rebello CM. The quality of soil organic matter, accessed by 13C solid state nuclear magnetic resonance, is just as important as its content concerning pesticide sorption. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 266:115298. [PMID: 32798983 DOI: 10.1016/j.envpol.2020.115298] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 06/22/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
The global increase of food production has been achieved mainly through the intensive use of inputs such as pesticides. Once released to the soil, sorption (which could be represented by Freundlich solid-water distribution coefficients - KF) and degradation are two governing processes that determine the distribution and persistence of pesticides in the environment. In spite of the huge dataset, the only apparent generalisation is the high correlation between KF and soil organic matter (SOM) content. However, in this work no correlation was observed between KF and organic C content (OC) and so the obtained KOC (KF normalised by OC) spread out in a wide range: 1100 to 11,400 mL g-1 for abamectin; and 30-150 mL g-1 for atrazine, both ranges corroborate with data from literature. These high variabilities indicate that other soil components or SOM quality strongly interfere in the pesticide sorption in addition to SOM content. Seeking to estimate the influence of SOM quality in the abamectin and atrazine KOC values, the humic acids, a fraction of the SOM, was analysed by 13C nuclear magnetic resonance spectroscopy (13C NMR) and Principal Component (PC) Regression. The first PC of 13C NMR spectra presented negative loadings for aliphatic compounds and positive loadings for aryl C, typical of partially oxidised pyrogenic C. Their scores showed strong correlation with the abamectin KOC values (R2 = 0.91, p < 5 10-8) and weaker with atrazine KOC (R2 = 0.63, p < 0.0001), in addition to a smaller standardised slope: 1.01 for abamectin and 0.76 for atrazine. These results could be explained by the higher hydrophobicity of abamectin, being thus more prone to interact with the polycondensed aryl groups from the pyrogenic C. It is also important to highlight that humic acids are useful proxies for understanding the paramount interaction of SOM with pesticides.
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Affiliation(s)
- E H Novotny
- EMBRAPA Soils, Rua Jardim Botânico, 1024, 22460-000, Rio de Janeiro, RJ, Brazil.
| | - A P D Turetta
- EMBRAPA Soils, Rua Jardim Botânico, 1024, 22460-000, Rio de Janeiro, RJ, Brazil; Program of Territorial Development and Public Policy, Federal Rural University of Rio de Janeiro, Seropedica 23890-000, Brazil
| | - M F Resende
- EMBRAPA Soils, Rua Jardim Botânico, 1024, 22460-000, Rio de Janeiro, RJ, Brazil
| | - C M Rebello
- EMBRAPA Soils, Rua Jardim Botânico, 1024, 22460-000, Rio de Janeiro, RJ, Brazil
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3
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Szabó L, Vancsik A, Király C, Ringer M, Kondor A, Jakab G, Szalai Z, Filep T. Investigation of the sorption of 17α-ethynylestradiol (EE2) on soils formed under aerobic and anaerobic conditions. CHEMOSPHERE 2020; 240:124817. [PMID: 31561160 DOI: 10.1016/j.chemosphere.2019.124817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 09/06/2019] [Accepted: 09/07/2019] [Indexed: 06/10/2023]
Abstract
A study was conducted on the sorption of 17α-ethynylestradiol (EE2) on five soils formed under different redox conditions: an Arenosol (A_20) with fully aerobic conditions, two Gleysol samples (G_20 and G_40) with suboxic and anoxic conditions and two Histosols (H_20 and H_80) with mostly anoxic conditions. The soils were characterized on the basis of total organic carbon (TOC), specific surface area (SSA) and the Fourier transform infrared spectra of the humic acid and humin fractions (the soil remaining after alkali extraction) of the soil. The maximum adsorption capacity of the soils (Qmax) ranged from 10.7 to 83.6 mg/g in the order G_20 > H_20 > G_40 > A_20 > H_80, which reflected the organic matter content of the soils. The sorption isotherms were found to be nonlinear for all the soil samples, with Freundlich n values of 0.45-0.68. The strong nonlinearity found in the adsorption of the H_80 samples could be attributed to their high hard carbon content, which was confirmed by the high aromaticity of the humin fraction. The maximum sorption capacity (Qmax) of the soils did not increase indefinitely as the organic carbon content of the soils rose. There could be two reasons for this: (i) the large amount of organic matter may reduce the number of binding sites on the surface, and (ii) the decrease in SSA with increasing soil OC content may limit the ability to adsorb EE2 molecules. In anaerobic soil samples, where organic matter accumulation is pronounced, the amount of aromatic and phenolic compounds was higher than in better aerated soil profiles. Strong correlations were found between the amount of aromatic and phenolic compounds in the organic matter and the adsorption of EE2 molecules, indicating that π-π interaction and H-bonding are the dominant sorption mechanisms.
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Affiliation(s)
- Lili Szabó
- Hungarian Academy of Sciences, Geographical Institute, Research Centre for Astronomy and Earth Sciences, Budapest, Hungary; Eötvös Loránd University, Faculty of Science, Environmental and Landscape Geography, Budapest, Hungary.
| | - Anna Vancsik
- Hungarian Academy of Sciences, Geographical Institute, Research Centre for Astronomy and Earth Sciences, Budapest, Hungary
| | - Csilla Király
- Hungarian Academy of Sciences, Geographical Institute, Research Centre for Astronomy and Earth Sciences, Budapest, Hungary
| | - Marianna Ringer
- Hungarian Academy of Sciences, Geographical Institute, Research Centre for Astronomy and Earth Sciences, Budapest, Hungary
| | - Attila Kondor
- Hungarian Academy of Sciences, Geographical Institute, Research Centre for Astronomy and Earth Sciences, Budapest, Hungary
| | - Gergely Jakab
- Hungarian Academy of Sciences, Geographical Institute, Research Centre for Astronomy and Earth Sciences, Budapest, Hungary; Eötvös Loránd University, Faculty of Science, Environmental and Landscape Geography, Budapest, Hungary; Institute of Geography and Geoinformatics, University of Miskolc, Miskolc, Hungary
| | - Zoltán Szalai
- Hungarian Academy of Sciences, Geographical Institute, Research Centre for Astronomy and Earth Sciences, Budapest, Hungary; Eötvös Loránd University, Faculty of Science, Environmental and Landscape Geography, Budapest, Hungary
| | - Tibor Filep
- Hungarian Academy of Sciences, Geographical Institute, Research Centre for Astronomy and Earth Sciences, Budapest, Hungary
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Zhang Y, Pignatello JJ, Tao S. Bioaccessibility of PAHs and PAH derivatives in a fuel soot assessed by an in vitro digestive model with absorptive sink: Effects of aging the soot in a soil-water mixture. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 615:169-176. [PMID: 28968578 DOI: 10.1016/j.scitotenv.2017.09.227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Revised: 09/21/2017] [Accepted: 09/21/2017] [Indexed: 06/07/2023]
Abstract
Aging soot in soil under neutral aqueous condition for 30days significantly (p<0.05) reduced the apparent gastrointestinal bioaccessibility (Bapp) of polycyclic aromatic hydrocarbons (PAHs) and PAH derivatives (d-PAHs) natively present in a composite fuel soot sample. Bapp was determined under fasting conditions by a previously developed in vitro digestive model that includes silicone sheet as a third phase absorptive sink in the small intestinal stage. Redistribution of contaminants from soot to soil, determined in independent experiments, was too small to affect Bapp. Prior uptake by soot of a commercial humic acid representing dissolved soil organic matter had no impact on Bapp. We identified two causes for the reduction in Bapp by soil and found they were approximately additive. One is an aging time-independent "matrix effect" attributable to competitive sorption by the soil of labile contaminant that is desorbed from the soot during the digestion test. The other is the dissolution of soluble substances from the soot during the aging process that increases soot surface area and nanoporosity. The increased surface area and nanoporosity drive contaminants from labile to nonlabile states in the soot and decrease the desorption into the digestive fluid, the former contributing most to the reduction in Bapp. The present study shows that mixing of raw soot with soil has important effects, both aging and non-aging, on the bioaccessibility of soot-borne contaminants.
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Affiliation(s)
- Yanyan Zhang
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, PR China
| | - Joseph J Pignatello
- Department of Environmental Sciences, The Connecticut Agricultural Experiment Station, New Haven, CT 06504-1106, United States.
| | - Shu Tao
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, PR China.
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Qin Q, Chen X, Zhuang J. The surface-pore integrated effect of soil organic matter on retention and transport of pharmaceuticals and personal care products in soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 599-600:42-49. [PMID: 28463700 DOI: 10.1016/j.scitotenv.2017.04.148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 04/17/2017] [Accepted: 04/19/2017] [Indexed: 06/07/2023]
Abstract
This study examines a surface-pore integrated mechanism that allows soil organic matter (SOM) to influence the retention and transport of three representative pharmaceuticals and personal care products (PPCPs)-ibuprofen, carbamazepine, and bisphenol A-in agricultural soil. A series of sorption-desorption batch tests and breakthrough column experiments were conducted using manured and non-manured soils. Results show that SOM could substantially influence the environmental behaviors of PPCPs via two mechanisms: surface-coating and pore-filling. Surface-coating with molecular SOM decreases the sorption of dissociated PPCPs (e.g., ibuprofen) but increases the sorption of non-dissociated PPCPs (e.g., carbamazepine and bisphenol A), while pore-filling with colloidal SOM enhances the retention of all the PPCPs by providing nano-/micro-pores that limit diffusion. The higher retention and lower mobility of PPCPs in soil microaggregates than in bulk soils suggest that SOM content and SOM-altered soil pore structure could exert a coupled effect on PPCP retention. Differences in the elution of PPCPs with low surface tension solution (i.e., 20% ethanol) in the presence and absence of SOM indicate that PPCPs prefer to remain in SOM-filled pores. Overall, ibuprofen has a high environmental risk, whereas carbamazepine and bisphenol A could be readily retarded in agricultural soils (with a loamy clay texture). This study implies that SOM accrual (particularly pore-filling SOM) has a high potential for reducing the off-site risks of PPCPs by increasing soil nano-/micro-porosity.
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Affiliation(s)
- Qin Qin
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; Eco-Environment Protection Institute, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Xijuan Chen
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Jie Zhuang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; Department of Biosystems Engineering and Soil Science, Center for Environmental Biotechnology, The University of Tennessee, Knoxville, TN 37996, USA.
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6
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Li F, Pan B, Liang N, Chang Z, Zhou Y, Wang L, Li H, Xing B. Reactive mineral removal relative to soil organic matter heterogeneity and implications for organic contaminant sorption. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 227:49-56. [PMID: 28454021 DOI: 10.1016/j.envpol.2017.04.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 04/16/2017] [Accepted: 04/19/2017] [Indexed: 06/07/2023]
Abstract
Soil organic matter (SOM) is generally treated as a static compartment of soil in pollutant fate studies. However, SOM might be altered or fractionated in soil systems, and the details of SOM property/composition changes when coupled with contaminant behavior are unknown. In this study, a mild acid treatment was adopted to remove reactive minerals and partially remove SOM components. After acid treatment, biomarker signatures showed that lignin-derived phenols were released and black carbon (as suggested by benzene-polycarboxylic acids) and lipids were enriched. The biomarker information was consistent with common bulk chemical characterization. The sorption coefficient Kd for PHE was two times higher after acid treatment, whereas Kd for OFL was three times lower. The organic carbon normalized sorption coefficient KOC values for PHE were higher for soils after acid treatment, indicating stronger interactions between PHE and SOM. The linear regression line between Kd and fOC for OFL showed lower intercepts and slopes after reactive mineral removal, suggesting a decreased contribution of minerals and reduced dependence on SOM. These results were attributed to the release of polar compositions in SOM accompanied by reactive mineral removal. Our results suggest that the mobility of ionic organic contaminants increases, whereas that of hydrophobic organic contaminants decreases after acid treatment with respect to reactive mineral depletion. This study emphasized that new insights into the coupling of SOM dynamics should be incorporated into organic contaminant behavior studies. SOM molecular biomarkers offer a useful technique for correlating SOM composition and sorption property changes.
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Affiliation(s)
- Fangfang Li
- Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming, 650500, China; Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States
| | - Bo Pan
- Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming, 650500, China.
| | - Ni Liang
- Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming, 650500, China
| | - Zhaofeng Chang
- Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming, 650500, China
| | - Yuwei Zhou
- Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming, 650500, China
| | - Lin Wang
- Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming, 650500, China
| | - Hao Li
- Faculty of Environmental Science & Engineering, Kunming University of Science & Technology, Kunming, 650500, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, United States
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Guo X, Shen X, Zhang M, Zhang H, Chen W, Wang H, Koelmans AA, Cornelissen G, Tao S, Wang X. Sorption mechanisms of sulfamethazine to soil humin and its subfractions after sequential treatments. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 221:266-275. [PMID: 27955989 DOI: 10.1016/j.envpol.2016.11.073] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Revised: 11/23/2016] [Accepted: 11/26/2016] [Indexed: 06/06/2023]
Abstract
Sorption mechanisms of an antibiotic sulfamethazine (SMT) to humin (HM) isolated from a peat soil and its subfractions after sequential treatments were examined. The treatments of HM included removal of ash, O-alkyl carbon, lipid, and lignin components. The HF/HCl de-ashing treatment removed a large amount of minerals (mainly silicates), releasing a fraction of hydrophobic carbon sorption domains that previously were blocked, increasing the sorption of SMT by 33.3%. The de-O-alkyl carbon treatment through acid hydrolysis greatly reduced polarity of HM samples, thus weakening the interaction between sorbents with water at the interfaces via H-bonding, leaving more effective sorption sites. Sorption of SMT via mechanisms such as van der Waals forces and π-π interactions was enhanced by factors of 2.04-2.50. After removing the lipid/lignin component with the improved Soxhlet extraction/acid hydrolysis, the organic carbon content-normalized sorption enhancement index Eoc was calculated. The results demonstrated that the Eoc-lipid for SMT (16.9%) was higher than Eoc-lignin (10.1%), implying that removal of unit organic carbon mass of lipid led to a higher increase in sorption strength than that of lignin. As each component was progressively removed from HM, the sorption strength and isotherm nonlinearity of the residual HM samples for SMT were gradually enhanced. The Koc values of SMT by HM samples were positively correlated with their aromatic carbon contents, implying that π-π electron donor-acceptor interactions between the benzene ring of sorbate and the aromatic domains in HM played a significant role in their interactions.
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Affiliation(s)
- Xiaoying Guo
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China; School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, Henan province, China
| | - Xiaofang Shen
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Meng Zhang
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Haiyun Zhang
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Weixiao Chen
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Hui Wang
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - A A Koelmans
- Aquatic Ecology and Water Quality Management Group, Wageningen University, P.O. Box 47, 6700 AA Wageningen, The Netherlands
| | - Gerard Cornelissen
- Department of Environmental Engineer, Norwegian Geotechnical Institute, POB 3930, Ulleval Stadion, N-0806 Oslo, Norway
| | - Shu Tao
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Xilong Wang
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
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8
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Zhang D, Duan D, Huang Y, Xiong Y, Yang Y, Ran Y. Role of structure, accessibility and microporosity on sorption of phenanthrene and nonylphenol by sediments and their fractions. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 219:456-465. [PMID: 27238761 DOI: 10.1016/j.envpol.2016.05.052] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/26/2016] [Accepted: 05/19/2016] [Indexed: 06/05/2023]
Abstract
To better understand interaction mechanism of sediment organic matter with hydrophobic organic compounds, sorption of phenanthrene (Phen) and nonylphenol (NP) by bulk sediments and their fractions was investigated. Three surface sediments were selectively fractionated into different organic fractions, including the demineralized carbon (DM), lipid free carbon (LF), lipid (LP), and nonhydrolyzable carbon (NHC) fractions. The structure and microporosity of the isolated fractions were characterized by NMR and CO2 adsorption techniques, and used as sorbents for Phen and NP. The calculated micropore volumes (Vo) and specific surface area (SSA) values are positively related to the concentrations of aromatic C and char for the DM, LF and NHC fractions, suggesting that aromatic moieties and char component significantly contribute to the microporosity. The LF fractions exhibit greater sorption affinity than the DM fractions do, indicating that the presence of LP could block the accessibility of sorption sites for Phen and NP. Significant and positive correlations among log K'FOC values for Phen and NP and aromatic carbon and char contents, and Vo and SSA values suggest the aromatic moieties and microporosity dominate their sorption of HOCs by sediment organic matter (SOM). As the NHC fractions have much stronger sorption than other fractions do, they dominate the overall sorption by the bulk samples. This study indicated that the important roles of aromatic moieties, accessibility, and microporosity in the sorption of HOCs by SOM.
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Affiliation(s)
- Dainan Zhang
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Dandan Duan
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Youda Huang
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yongqiang Xiong
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Yu Yang
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Yong Ran
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.
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Smernik RJ, Kookana RS. The effects of organic matter-mineral interactions and organic matter chemistry on diuron sorption across a diverse range of soils. CHEMOSPHERE 2015; 119:99-104. [PMID: 24972176 DOI: 10.1016/j.chemosphere.2014.05.066] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 04/14/2014] [Accepted: 05/05/2014] [Indexed: 06/03/2023]
Abstract
Sorption of non-ionic organic compounds to soil is usually expressed as the carbon-normalized partition coefficient (KOC), because it is assumed that the main factor that influences the amount sorbed is the organic carbon content of the soil. However, KOC can vary by a factor of at least ten across a range of soils. We investigated two potential causes of variation in diuron KOC - organic matter-mineral interactions and organic matter chemistry - for a diverse set of 34 soils from Sri Lanka, representing a wide range of soil types. Treatment with hydrofluoric acid (HF-treatment) was used to concentrate soil organic matter. HF-treatment increased KOC for the majority of soils (average factor 2.4). We attribute this increase to the blocking of organic matter sorption sites in the whole soils by minerals. There was no significant correlation between KOC for the whole soils and KOC for the HF-treated soils, indicating that the importance of organic matter-mineral interactions varied greatly amongst these soils. There was as much variation in KOC across the HF-treated soils as there was across the whole soils, indicating that the nature of soil organic matter is also an important contributor to KOC variability. Organic matter chemistry, determined by solid-state (13)C nuclear magnetic resonance (NMR) spectroscopy, was correlated with KOC for the HF-treated soils. In particular, KOC increased with the aromatic C content (R=0.64, p=1×10(-6)), and decreased with O-alkyl C (R=-0.32, p=0.03) and alkyl C (R=-0.41, p=0.004) content.
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Affiliation(s)
- Ronald J Smernik
- Soils Group, School of Agriculture, Food and Wine and Waite Research Institute, The University of Adelaide, Waite Campus, Urrbrae, South Australia 5064, Australia.
| | - Rai S Kookana
- Soils Group, School of Agriculture, Food and Wine and Waite Research Institute, The University of Adelaide, Waite Campus, Urrbrae, South Australia 5064, Australia; CSIRO, Land & Water, PMB 2, Glen Osmond SA 5064, Australia
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10
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Szajdak LW, Maryganova V, Skakovskii E, Tychinskaya L. (1)H and (13)C NMR spectroscopic studies of hexane-extractable lipids from soils under shelterbelts of different age and composition of plants. CHEMOSPHERE 2015; 119:1422-1427. [PMID: 25454205 DOI: 10.1016/j.chemosphere.2014.10.032] [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: 01/07/2014] [Revised: 09/22/2014] [Accepted: 10/10/2014] [Indexed: 06/04/2023]
Abstract
Comparative study of the composition of lipids extracted with n-hexane from soils under shelterbelts of different age and composition of plants and adjoining cultivated fields in agrolandscape has been carried out with the application of (1)Н and (13)С NMR spectroscopy. The lipid content correlates with the organic carbon content in soils and is the highest in the soil under the 200-years old shelterbelt. The data received indicate that hexane-extractable lipids from the soil under the 200-years old shelterbelt have undergone the most significant biochemical and chemical transformations (oxidation, hydrolysis, polymerization) with the accumulation of resistant compounds and destruction of esters of o-phthalic acid as anthropogenic contaminants compared to the lipids from the soil under the 14-years old shelterbelt and soils of adjoining arable fields.
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Affiliation(s)
- Lech Wojciech Szajdak
- Institute for Agricultural and Forest Environment, Polish Academy of Sciences, Poznań, Poland.
| | - Victoria Maryganova
- Institute for Nature Management, National Academy of Sciences of Belarus, Minsk, Belarus.
| | - Eugene Skakovskii
- Institute of Physico-Organic Chemistry, National Academy of Sciences of Belarus, Minsk, Belarus.
| | - Ludmila Tychinskaya
- Institute of Physico-Organic Chemistry, National Academy of Sciences of Belarus, Minsk, Belarus.
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Mitchell PJ, Simpson MJ. High affinity sorption domains in soil are blocked by polar soil organic matter components. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013. [PMID: 23206246 DOI: 10.1021/es303853x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Reported correlations between organic contaminant sorption affinity and soil organic matter (OM) structure vary widely, suggesting the importance of OM physical conformation and accessibility. Batch equilibration experiments were used to examine the sorption affinity of bisphenol A, atrazine, and diuron to five soils of varying OM composition. (13)C cross-polarization magic angle spinning NMR spectroscopy was used to characterize the organic carbon chemistry of the soil samples. High sorption by a soil low in O-alkyl components suggested that these structures may block high affinity sorption sites in soil OM. As such, soil samples were subjected to acid hydrolysis, and NMR results showed a decrease in the O-alkyl carbon signal intensity for all soils. Subsequent sorption experiments revealed that organic carbon-normalized distribution coefficient (K(OC)) values increased for all three contaminants. Before hydrolysis, K(OC) values correlated positively with soil aromatic carbon content and negatively with polar soil O-alkyl carbon content. While these correlations were weaker after hydrolysis, the correlation between K(OC) values and soil alkyl carbon content improved. This study suggests that hydrolyzable O-alkyl soil OM components may block high affinity sorption sites and further highlights the importance of OM physical conformation and accessibility with respect to sorption processes.
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Affiliation(s)
- Perry J Mitchell
- Department of Chemistry and Environmental NMR Centre, University of Toronto, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
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Liu Y, Xu Z, Wu X, Gui W, Zhu G. Adsorption and desorption behavior of herbicide diuron on various Chinese cultivated soils. JOURNAL OF HAZARDOUS MATERIALS 2010; 178:462-8. [PMID: 20153105 DOI: 10.1016/j.jhazmat.2010.01.105] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2009] [Revised: 12/20/2009] [Accepted: 01/20/2010] [Indexed: 05/21/2023]
Abstract
The adsorption-desorption behaviors of diuron were investigated in six cultivated soils of China. The effect of system pH and temperature were also studied. The data fitted the Freundlich equation very well. The adsorption K(F) values indicated the adsorption of diuron in the six soils was in the sequence of black soil (D)>yellow earth (F)>paddy soil (B)>yellow-brown soil (C)>yellow-cinnamon soil (A)>lateritic red earth (E). The adsorption K(F) and Freundlich exponents n were decreased when temperature was increased from 298 K to 318 K. However, the Gibb's free energy values were found less negative with the increasing temperature. Meanwhile, the extent of diuron adsorption on soil was at rather high level under low pH value conditions and decreased with increasing pH value. In addition, the desorption behavior of diuron in the six soils was in the sequence of lateritic red earth (E)>yellow-cinnamon soil (A)>paddy soil (B)>yellow earth (F)>yellow-brown soil (C)>black soil (D). At the same time, desorption hysteresis of diuron were observed in all of the tested soils. And the soil organic matter content may play an important role in the adsorption-desorption behavior.
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Affiliation(s)
- Yihua Liu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou, China
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Ahangar AG, Smernik RJ, Kookana RS, Chittleborough DJ. The effect of solvent-conditioning on soil organic matter sorption affinity for diuron and phenanthrene. CHEMOSPHERE 2009; 76:1062-1066. [PMID: 19435638 DOI: 10.1016/j.chemosphere.2009.04.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2009] [Revised: 04/14/2009] [Accepted: 04/15/2009] [Indexed: 05/27/2023]
Abstract
The effect of solvent-conditioning on the sorption of diuron and phenanthrene was investigated. The organic carbon-normalized sorption coefficients (K(OC)) for diuron and phenanthrene (determined from single initial concentrations of 0.8mgL(-1) and 1.5mgL(-1), respectively) were consistently higher following solvent-conditioning of a whole soil with five organic solvents (acetonitrile, acetone, methanol, chloroform and dichloromethane). The relative increase in K(OC) was inversely related to the polarity of the conditioning solvent (i.e. greater increases in K(OC) were observed for the least polar solvents: chloroform and dichloromethane). The effect of solvent-conditioning on the sorption properties of the same soil that had been lipid-extracted using accelerated solvent extraction (ASE) was also investigated. Since lipid extraction involves treatment with a non-polar solvent (95:5 dichloromethane:methanol) one may have expected no further increase in K(OC) on solvent-conditioning. On the contrary, the lipid-extracted soil exhibited very similar increases in K(OC) as the whole soil. This demonstrated that lipid removal and solvent-conditioning, which both increased K(OC) for this soil, are quite separate phenomena.
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