Abstract：
:In this study we explore the relationship between solution pH and the distribution of the binding interactions at different domains of a dissolved humic acid (HA) for three xenobiotics: pentafluoroaniline (PFA), pentafluorophenol (PFP), and hexafluorobenzene (HFB). The components of HA where xenobiotic interactions occur are identified using the (1)H{(19)F} Reverse Heteronuclear Saturation Transfer Difference (RHSTD) Nuclear Magnetic Resonance (NMR) spectroscopy experiment. At low pH, PFA and PFP interact preferentially with aromatic components of HA. Increasing pH reduces this preference. Conversely, HFB interacts with all components of HA equally, across the entire pH range. The possible roles of both aromatic-specific interactions and conformational changes of HA behind these observations are explored. It is shown that T-oriented π-π interactions at π-electron accepting HA structures are slightly stronger for PFA and PFP than for HFB. Using DOSY NMR it is shown that the pH-dependence of the interactions is correlated with changes in the conformation of the carbohydrate components of HA rather than with the aromatic components. It is argued that the observed preference for aromatic HA is caused by restricted access to the non-aromatic components of HA at low pH. These HA components form tightly bound hydrophobic domains due to strong inter- and intra-molecular hydrogen bonds. At high pH, these structures open up, making them more available for interactions with polar compounds.
journal_name
Chemospherejournal_title
Chemosphereauthors
Longstaffe JG,Courtier-Murias D,Simpson AJdoi
10.1016/j.chemosphere.2012.07.004subject
Has Abstractpub_date
2013-01-01 00:00:00pages
270-5issue
2eissn
0045-6535issn
1879-1298pii
S0045-6535(12)00885-5journal_volume
90pub_type
杂志文章相关文献
CHEMOSPHERE文献大全abstract：:Chemical kinetics of trichloroethene (TCE) degradation by pyrite was investigated at different experimental conditions. The TCE was transformed into C2H2, 1,1-dichloroethene (DCE) and C2H4 by a slow process (240 h required to convert TCE by 80%). Thereafter, the degradation rate showed a monotonous increase with the p...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/s0045-6535(00)00160-0
更新日期：2001-02-01 00:00:00
abstract：BACKGROUND:As one of the most common endocrine-disrupting chemicals (EDCs), bisphenol A (BPA) is a threat to aquatic ecosystems. Despite a rich literature addressing the adverse effects of BPA on various systems in fish models, the potential impact of parental BPA exposure on offspring pharyngeal cartilage development ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2020.126537
更新日期：2020-06-01 00:00:00
abstract：:The temporal dynamics of some trace elements in two different types of Mediterranean soils were studied in order to evaluate the possible long-term contamination following compost amendments. Total and available (DTPA-extractable) concentrations of Cd, Cu, Pb and Zn were determined. The study was carried out on two ag...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2010.05.033
更新日期：2010-08-01 00:00:00
abstract：:Food contamination with cadmium (Cd) is a serious health threat to humans worldwide and Cd accumulation by rice is a major source of Cd entrance to the food chain. Silicon (Si) application decreases the Cd content in rice but the timing of Si application may need further investigation. The present study investigated t...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2019.03.182
更新日期：2019-07-01 00:00:00
abstract：:The speciation of Al3+ in aqueous solutions containing organic and inorganic ligands important from a biological (citrate (Cit3-), gluconate (Gluc-), lactate (Lac-), silicate (H2SiO42-), carbonate (CO32-), fluoride (F-)) and industrial (Gantrez®; polymethyl-vinyl-ether-co-maleic acids; GTZ S95 and GTZ AN169) point of ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2017.08.015
更新日期：2017-11-01 00:00:00
abstract：:In recent years, several changes have been made to the composition of various products which are used indoors. Plenty of new chemical additives have been incorporated to materials to comply with current legislation and safety rules. Consequently, the emission profiles of contaminants detected indoors may change over t...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2020.127817
更新日期：2021-01-01 00:00:00
abstract：:Automatic biodetector of water toxicity is a biosensor based on monitoring of catalytic activity of the nitrifying bacteria. To create a standardized biosensing system, development of the biofilm must be characterized to determine the prerequisites for its biological (biocatalytic) stability. In this paper, growth of ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2009.12.035
更新日期：2010-02-01 00:00:00
abstract：:This present study reports that reactive oxygen species (ROS), which mainly consist of hydroxyl (OH) and superoxide (O2(-)) radicals generated by the photocatalysis of TiO2 nanoparticles (TiO2 NPs) in suspension, can be quantitatively measured by the colorimetric probe-assisted spectrometric method without any interfe...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2013.07.023
更新日期：2013-11-01 00:00:00
abstract：:This study investigated the accumulation and distribution of nickel in the leaves and roots of the Mediterranean shrub Alyssoides utriculata to assess its potential use in phytoremediation of Ni contaminated soils. Total (AAS and ICP-MS) Ni, Ca and Mg contents were analyzed in the plants and related to their bioavaila...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2014.02.031
更新日期：2015-01-01 00:00:00
abstract：:Grain Cd concentrations were determined in wheat (Triticum aestivum L.) grown in 1999, 2001 and 2003, at six sludge cake field experiments. Three of these sites also had comparisons with Cd availability from metal amended liquid sludge and metal salts. Grain Cd concentrations in all years and at all sites were signifi...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2006.09.068
更新日期：2007-01-01 00:00:00
abstract：:The ubiquity of environmental pollution by endocrine disrupting chemicals (EDCs) such as bisphenol A (BPA) is progressively considered as a major threat to aquatic ecosystems worldwide. Numerous toxicological studies have proved that BPA are hazardous to aquatic environment, along with alterations in the development a...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2016.11.053
更新日期：2017-02-01 00:00:00
abstract：:As recently recognized exposure and effect assessment of soil contaminants on soil biota is necessary for decision-making related to ecosystem services and habitat protection, establishment of remediation procedures, or pollution monitoring programs. Therefore, biological approaches to soil monitoring, such as the mea...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2012.11.040
更新日期：2013-03-01 00:00:00
abstract：:Compound-specific isotope analysis (CSIA) is a promising tool to study the environmental fate of a wide range of contaminants including pesticides. In this study, a novel CSIA method was developed to analyse the stable carbon isotope signatures of widely used chloroacetanilide herbicides. The developed method was appl...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2013.10.027
更新日期：2014-03-01 00:00:00
abstract：:The physico-chemical characteristics of granulated sludge lead us to develop its use as a packing material in air biofiltration. Then, the aim of this study is to investigate the potential of unit systems packed with this support in terms of ammonia and hydrogen sulfide emissions treatment. Two laboratory scale pilot ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/s0045-6535(02)00395-8
更新日期：2003-01-01 00:00:00
abstract：:Phosphorous (P) fertilization is an important agronomic practice, but its role in enhancing phytoremediation efficacy and mediating detoxification has rarely been reported in environmental remediation studies. In this study, a pot experiment was undertaken to assess: firstly, the effect of P on phytoextraction of Cu b...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2020.125965
更新日期：2020-05-01 00:00:00
abstract：:In this study, we tested phenolic compounds such as bisphenol A (BPA), 4-nonylphenol (NP), 4-octylphenol (OP) and 4-propylphenol (PP) by using glucose-6-phosphate dehydrogenase (G6PD) in estrogen sensitive human breast cancer cells (MCF-7 cells) and glutathione peroxidase (GPx) in female immature Sprague-Dawley (SD) r...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/s0045-6535(02)00628-8
更新日期：2003-03-01 00:00:00
abstract：:Despite increasing environmental concerns and stringent limitations on the sulfur content in fuels, many waste hydrodesulfurization (HDS) catalysts containing Co, Mo, Ni and V are generated in the petroleum refining process. To recover valuable metals in the waste HDS catalysts via hydrometallurgy, thermal treatment i...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2007.04.030
更新日期：2007-09-01 00:00:00
abstract：:Natural occurring metal-tolerant microbial population have replaced conventional expensive metal remediation approach since the last few years. The present study focuses on investigating the potential of a copper-tolerant plant growth promoting rhizobacterial strain Brevundimonas diminuta MYS6 for Cu bioremediation, p...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2020.128195
更新日期：2021-01-01 00:00:00
abstract：:In this study, we investigated the impact of intensive aeration pre-treatment on nutrient contents and phytotoxicity of anaerobically digested manure centrate. Activated sludge from conventional wastewater treatment plants was added to reinforce the aeration process. Results show that the addition of activated sludge ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2018.03.170
更新日期：2018-07-01 00:00:00
abstract：:Photodegradation studies of the organophosphorous insecticide methidathion in thin layers of wet soil samples have been carried out under solar irradiation. Soil samples consisted of an agricultural soil added with two amendments: a municipal biosolid and the cationic surfactant TDTMA (tetradecyl trimethyl ammonium br...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2004.09.108
更新日期：2005-05-01 00:00:00
abstract：:Plastic debris is accumulating in agricultural land due to the increased use of plastic mulches, which is causing serious environmental problems, especially for biochemical and physical properties of the soil. Dissolved organic matter (DOM) plays a central role in driving soil biogeochemistry, but little information i...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2017.07.064
更新日期：2017-10-01 00:00:00
abstract：:We examined the effect of 2,4,4'-trichloro-2'-hydroxydiphenyl ether (Irgasan DP300) on microsomal cytochrome P450 (P450) enzymes in rat liver. Rats were treated intraperitoneally with Irgasan DP300 daily for 4 days, at doses of 0.2, 0.4 and 0.8 mmol/kg. Among the P450-dependent monooxygenase activities, 7-benzyloxyres...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/s0045-6535(97)00464-5
更新日期：1997-02-01 00:00:00
abstract：:As common advanced oxidation processes, Fenton-like and peroxymonosulfate (PMS) processes have received enormous attention due to their high efficiency in the pollutants degradation. In this study, the Co/g-C3N4 photocatalyst was prepared by facial calcination strategy and used to evaluate the behavior of the Co/g-C3N...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2020.127955
更新日期：2021-01-01 00:00:00
abstract：:Intake fractions (iFs) for emissions to air, water, and soil for 17 PCDDs/DFs and 12 Co-PCBs were calculated with a level III multimedia model and a food-chain exposure model in succession. The two integrated models were tested by comparing the predicted and measured concentrations in the environment and by comparing ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2003.08.011
更新日期：2004-03-01 00:00:00
abstract：:Washing is the most practical way to remove pesticide residues in fruits and vegetables. Two commonly used kitchen dishwashing liquids (detergents) in Chinese market were tested for enhanced removal of chlorpyrifos (CHP) and chlorothalonil (CHT) in cherry tomatoes by soaking the cherry tomatoes in the detergent soluti...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2013.03.039
更新日期：2013-08-01 00:00:00
abstract：:A simple and relatively fast approach for developing a solid phase extraction has been described and used for determination of trace quantities of some heavy and transition metal ions with sodium dodecyl sulfate (SDS)-coated poly vinyl chloride (PVC) modified with bis(2-hydroxyacetophenone)-1,4-butanediimine (BHABDI) ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2008.09.034
更新日期：2009-01-01 00:00:00
abstract：:Low concentrations of arsenic (As) contamination in aquatic environment is a worldwide issue, which is of great concern. To evaluate the impact of low concentrations of As on zebrafish, we measured the growth, antioxidant enzymes including superoxide dismutase (SOD) and catalase (CAT), oxidative damage (malondialdehyd...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2018.08.010
更新日期：2018-11-01 00:00:00
abstract：:The enantioselective degradation of ibuprofen and naproxen enantiomers was evaluated in five different wastewater treatment systems, including three constructed wetlands (vertical- and horizontal-flow configurations), a sand filter and an activated sludge wastewater treatment plant. In addition, injection experiments ...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2008.12.008
更新日期：2009-04-01 00:00:00
abstract：:Mercury (Hg) may originate from both anthropogenic and natural sources. The measurement of spatial and temporal variations of Hg isotope ratios in sediments may enable source identification and tracking of environmental processes. In this study we establish the distribution of mercury concentrations and mercury isotop...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2017.03.056
更新日期：2017-07-01 00:00:00
abstract：:Numerous indices have been developed to assess environmental risk of heavy metals in surface sediments, including the total content based geoaccumulation index (I(geo)), exchangeable fraction based risk assessment code (RAC), and biological toxicity test based sediment quality guidelines (SQGs). In this study, the thr...
journal_title：Chemosphere
pub_type： 杂志文章
doi：10.1016/j.chemosphere.2011.07.039
更新日期：2011-10-01 00:00:00
