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sorption of Perfluorooctane sulfonate(PFOS) including its isomers on hydrargillite as a function of pH,humic substances and Na2SO4

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Journal of Environmental Sciences 2022年第1期34卷 263-272页

作者： Jean-Noel Uwayezu Leo W.Y.Yeung Mattias Bäckström Man-Technology-Environment Research Centre(MTM) Örebro University70182ÖrebroSweden

Perfluorooctane sulfonate(PFOS)is a persistent organic pollutant(POP)and emergent contaminant that are widespread in the *** the mechanisms controlling the distribution of PFOS and its isomers between hydrargillite and the water phase is important in order to study their redistribution and mobility in the *** study investigated the effects of pH,humic acid,fulvic acid and Na_(2)SO_(4) on sorption of PFOS isomers to hydrargillite.A mixture of PFOS isomers was spiked into water and hydrargillite was added to the system and shaken for one day;the system was tested with different aqueous *** of PFOS isomers in the aqueous phase were quantified using an ultra-performance liquid chromatograph coupled to a triple quadrupole mass *** results showed that the distribution coefficients of PFOS isomers were found to be 0.76,0.71,0.93 and 0.90 at pH 6.5,for 3-/4-/5-PFOS,6-/2-PFOS,L-PFOS and total PFOS *** distribution coefficients increased at lower pH and decreased at alkaline *** presence of humic substances(HS)increased the sorption slightly at the environmental pH of 6.5,although a competition effect was observed during acidic conditions.A tendency of PFOS distribution to hydrargillite in the presence of Na_(2)SO_(4) was like its behavior in the presence of HS although the mechanisms behind the sorption were interpreted *** study revealed that L-PFOS was readily sorbed when no other chemicals were added or in 20 mg/L FA or 100 mg/L Na_(2)SO_(4).We suggest that an increase in PFOS sorption in the presence of HS may be due to hydrophobic mechanisms while Na_(2)SO_(4) contributed to increased sorption through ionic strength effects.

关键词： Hydrargillite Perfluorooctane sulfonate sorption Humic substances Electrostatic,Ionic strength

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sorption and desorption behavior of residual antidepressants and caffeine in freshwater sediment and sewage sludge

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International Journal of Sediment Research 2022年第3期37卷 346-354页

作者： Ismael Laurindo Costa Junior Christiane Schinneider Machado Adelmo Lowe Pletsch Yohandra Reyes Torres Department of Chemistry Federal University of Technology-Paraná (UTFPR) Department of Chemistry State University of Midwest (UNICENTRO)

The use of antidepressants is widespread in modern times. Thus, they present a potential risk for ecosystems due to occurrence in domestic sewage containing unaltered metabolites and structures, even after the treatment plants have processed the sewage. The current research investigated the sorption and desorption of antidepressants(citalopram, venlafaxine, fluoxetine, sertraline, and amitriptyline) and caffeine from freshwater sediment and sewage sludge. The samples of freshwater sediment were collected in a river spring in an area with few anthropogenic sources of pollution and samples of sewage sludge were taken from stabilization ponds of a sewage treatment. The matrices were mainly composed of organic fractions, sediment of humic nature, and aliphatic biomolecules in sludges. The presence of silt and clay in the sediment proved to be important for the sorption process when compared to the flocs and colloidal structure of the sludge. The kinetic study indicated pseudo-first order behavior. The Freundlich isotherm was satisfactorily used in the interpretation of sorption and desorption for all analytes and matrices. The high percentages obtained for desorption suggest analyte mobility, which is more intense in the sludge than in the sediment since each matrix has a different composition. It can be considered that the information obtained here reinforces the ecotoxicological concern with respect to pharmacological residues in the environment, as processes of retention by sorption in the sludge and the sediment have been confirmed, as well as the preferential partition of some analytes by the aqueous phase.

关键词： Emerging pollutants Drugs Persistence Partition Mobility sorption

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A comparative study of the sorption of O-PAHs and PAHs onto soils to understand their transport in soils and groundwater

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Journal of Environmental Sciences 2023年第2期124卷 61-75页

作者： W.Almouallem J.Michel S.Dorge C.Joyeux G.Trouve D.Le Nouen French National Institute for Industrial and Environment and Risks Direction Sites&TerritoiresVerneuil en HalatteF-60550France University of Haute-Alsace Laboratoire Gestion des Risques et Environnement(LGRE)UR2334MulhouseFrance University of Strasbourg 67000 StrasbourgFrance University of Haute-Alsace Laboratoire d’Innovation Moléculaire et Applications(LIMA)UMR 7042 CNRSMulhouseFrance

Polycyclic aromatic hydrocarbons(PAHs)and their oxygenated derivates(O-PAHs)are identified in soils and groundwater of industrialized sites and contribute to the risk for Humans and the ***,data are scarce in literature concerning their retention and transfer in soils and no soil-water partition coefficients are available for these *** of two PAHs,fluorene and acenaphthene and two O-PAHs,9H-fluorenone and dibenzofuran onto two soils with different organic carbon contents was evaluated and compared by determining their sorption *** of ionic strength and liquid to solid ratio,on fluorene and fluorenone sorption was also *** equilibrium is achieved within less than 24 hr of mixing and linear sorption models best fit the isotherm *** and dibenzofuran are similarly sorbed onto the *** of fluorene is higher than the one of fluorenone,showing a smaller affinity of fluorenone towards the solid *** means that O-PAH could form larger contamination plumes in groundwater than *** the L/S ratio from 100 to 50 and 30,increases the sorption of fluorenone onto the soil by 56% and 67%respectively,while the sorption of fluorene is slightly *** the ionic strength of the aqueous phase also modifies the sorption of fluorenone,contrary to the sorption of fluorene which is slightly affected.

关键词： PAHs O-PAHs Contaminated soils Groundwater sorption Kinetics Isotherms

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Minimal crystallographic descriptors of sorption properties in hypothetical MOFs and role in sequential learning optimization

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npj Computational Materials 2022年第1期8卷 1154-1167页

作者： Giovanni Trezza Luca Bergamasco Matteo Fasano Eliodoro Chiavazzo Department of Energy Politecnico di TorinoC.so Duca degli Abruzzi 24Torino10129Italy

We focus on gas sorption within metal-organic frameworks(MOFs)for energy applications and identify the minimal set of crystallographic descriptors underpinning the most important properties of MOFs for CO_(2)and H_(2)O.A comprehensive comparison of several sequential learning algorithms for MOFs properties optimization is performed and the role played by those descriptors is *** energy transformations,thermodynamic limits of important figures of merit crucially depend on equilibrium properties in a wide range of sorbate coverage values,which is often only partially accessible,hence possibly preventing the computation of desired objective *** propose a fast procedure for optimizing specific energy in a closed sorption energy storage system with only access to a single water Henry coefficient value and to the specific surface *** are thus able to identify hypothetical candidate MOFs that are predicted to outperform state-of-the-art water-sorbent pairs for thermal energy storage applications.

关键词： functions sorption optimization

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Kinetics and capacities of non-reactive phosphorus (NRP) sorption to crushed autoclaved aerated concrete (CAAC)

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Journal of Environmental Sciences 2023年第5期127卷 799-810页

作者： Shuting Shen Xiang Li Zhuofan Geng Xiwu Lu School Energy and Environment Southeast UniversityNanjing 210096China ERC Taihu Lake Water Environment Wuxi Wuxi 214135China

With growing interest in resource recovery and/or reuse,wastematerials have been considered a promising alternative for phosphorus(P)adsorption because they are low-cost and easily *** autoclaved aerated concrete(CAAC),as representative construction waste,has been extensively studied for P removal in ecological technologies such as treatment ***,most of the previous studies focused on the adsorption of orthophosphate,namely reactive phosphorus,and lacked attention to non-reactive phosphorus(NRP)which is widely present in *** study presents the first investigation on the potential and mechanism of CAAC removing four model NRP *** isotherm and kinetics of NRP onto CAAC indicate that the removal of NRP was a chemisorption process and also involved a two-step pore diffusion *** desorption experiment shows that different NRP species showed varying degrees of *** NRP was irreversibly adsorbed on *** the model compounds considered in this study,the adsorption capacity and hydrolysis rate of organophosphorus were much less than that of inorganic ***,the adsorption of different NRP species by CAAC in the mesocosm study was different from the results of laboratory adsorption experiments,and the possible biodegradation was essential for the conversion and removal of *** findings confirmed the validity of CAAC for NRP removal and the potential advantages of CAAC in terms of costs and environmental *** study will contribute to a better understanding of NRP conversion and environmental fate and that can be the basis for a refined risk assessment.

关键词： Non-reactive phosphorus Crushed autoclaved aerated concrete Phosphorus removal sorption Wastewater treatment

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Roles of soluble minerals in Cd sorption onto rice straw biochar

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Journal of Environmental Sciences 2022年第3期34卷 64-71页

作者： Ying-heng Fei Zuannan Zhang Zhuofeng Ye Qihang Wu Ye-tao Tang Tangfu Xiao School of Environment Science and Engineering Guangzhou UniversityGuangzhou 510006China School of Environment Science and Engineering Sun Yat-sen UniversityGuangzhou 510006China

Transforming to biochar provides an environmentally friendly approach for crop residue reutilization,which are usually applied as sorbent for heavy metal *** typical siliconrich material,the specific sorptive mechanisms of rice straw derived biochar(RSBC)are concerned,especially at the low concentration range which is more environmentally *** the present study,Cd sorption onto RSBCs at the concentration of ≤5 mg/L was *** sorptive capacity was positively correlated with the pyrolytic temperature of the biochar and the environmental pH *** soluble minerals of the RSBCs played the dominant roles in Cd sorption,contributing 29.2%,62.5%and 82.9%of the total sorption for RSBCs derived under 300℃,500℃and 700℃,*** number of cations,dominantly K^(+),were exchanged during the *** with cations and carbonates may also be contributive to the *** dissolution of silicon-containing minerals was found to be declined during sorption,suggesting its involvement in the sorption process,possibly through ***,the sparingly soluble silicate crystals may impose ignorable role in the *** with organic groups is only a minor mechanism in Cd sorption,compared to the much more dominant roles of the inorganic ashes.

关键词： Cadmium sorption Rice straw Biochar Silicon-rich

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China's progress in radionuclide migration study over the past decade(2010–2021):sorption,transport and radioactive colloid

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Chinese Chemical Letters 2022年第7期33卷 3405-3412页

作者： Zongyuan Chen Siyuan Wang Huijuan Hou Kang Chen Pengyuan Gao Zhen Zhang Qiang Jin Duoqiang Pan Zhijun Guo Wangsuo Wu Frontiers Science Center for Rare Isotopes Lanzhou UniversityLanzhou 730000China The Key Laboratory of Special Function Materials and Structure Design Ministry of EducationLanzhou UniversityLanzhou 730000China Radiochemistry Laboratory School of Nuclear Science and TechnologyLanzhou UniversityLanzhou 730000China

The radionuclide(RN)migration study is not only helpful to understand environmental behavior of RNs,but also can establish the basis for the safety assessment of geological disposal of high-level radioactive waste(HLW).In the context of China’s HLW disposal,this review briefly summaries the progress of China’s RN migration studies over the past decade regarding three aspects,RN sorption,RN transport and radioactive *** studies from other disciplines(such as geology and environmental science)are also included in this review because they can provide references for the RN migration ***,China has achieved clear progress in RN migration study over the past decade,although large-scaled field experiments are lacked and a gap still exists comparing with the international advanced ***,several suggestions are proposed for future RN migration research in China.

关键词： High-level radioactive waste sorption Transport Colloid Spectroscopic analysis Theoretical calculation

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Magnesium activation affects the properties and phosphate sorption capacity of poultry litter biochar

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Biochar 2023年第1期5卷 1117-1130页

作者： Joshua T.Padilla Donald W.Watts Jeffrey M.Novak Vasile Cerven James A.Ippolito Ariel A.Szogi Mark G.Johnson United States Department of Agriculture Agricultural Research ServiceCoastal Plains SoilWater and Plant Research CenterFlorenceSC 29501USA School of Environment and Natural Resources The Ohio State UniversityColumbusOH 43210USA Center for Public Health and Environmental Assessment United States Environmental Protection AgencyCorvallisOR 97331USA

Biochars with a high affinity for phosphorus(P)are promising soil amendments for reducing P in agricultural *** litter(PL)is an abundant biochar ***,PL-derived biochars are typically high in soluble P and therefore require chemical modification to become effective P *** study investigated the effect of magnesium(Mg)activation on extractable P(EP)and P sorption capacities of PL-derived *** was produced at 500-900°C from PL activated with 0-1 M *** differentially aged PL feedstocks were evaluated(1-,3-5-,and 7-9-year-old).Increased Mg activation level and pyrolysis temperature both resulted in EP reductions from the ***,biochars produced at temperatures≥700°C from PL activated with≥0.25 M Mg had negligible EP.X-ray diffractograms indicated that increased Mg loading favored the formation of stable Mg_(3)(PO_(4))_(2) phases while increasing temperature favored the formation of both Mg_(3)(PO_(4))_(2) and Ca_(5)(PO_(4))_(3)*** P sorption capacities(Pmax)of the biochars were estimated by fitting Langmuir isotherms to batch sorption data and ranged from 0.66-10.35 mg g^(−1).Average Pmax values were not affected by PL age or pyrolysis temperature;however,biochars produced from 1 M Mg-activated PL did have significantly higher average Pmax values(p<0.05),likely due to a greater abundance of ***,the results demonstrated that Mg activation is an effective strategy for producing PLderived biochars with the potential ability to reduce P loading into environmentally sensitive ecosystems.

关键词： sorption activation pyrolysis

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Predicting the effect of dissolved humic acid on sorption of benzotriazole to biochar

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Biochar 2022年第1期4卷 959-971页

作者： Lin Wu Xiaoli Zhao Erping Bi School of Water Resources and Environment Beijing Key Laboratory of Water Resources and Environmental Engineeringand MOE Key Laboratory of Groundwater Circulation and Environmental EvolutionChina University of Geosciences(Beijing)Beijing 100083China China Geological Survey(CGS)&Hebei Province Key Laboratory of Groundwater Contamination and Remediation Institute of Hydrogeology and Environmental GeologyChinese Academy of Geological SciencesShijiazhuang 050061China

Dissolved organic matter plays a critical role in affecting sorption properties of biochar for organic *** this study,dissolved humic acid(DHA)as a representative of dissolved organic matter and oak sawdust-derived biochar as a sorbent were prepared and *** of DHA in sorption of benzotriazole(BTA),an emerging organic contaminant,to biochar in different electrolyte solutions were *** results revealed the dual roles of DHA in BTA sorption to *** the one hand,DHA can compete for sites and/or block pores available for BTA to inhibit the adsorption of BTA to *** the other hand,the sorbed DHA on biochar can serve as additional partitioning phase to promote the partition of *** finding was in accordance with the site energy distribution analysis of BTA sorption that the site energy of the highest occurring frequency in the DHA-BTA system was lower than that in the DHA-free system(3.41-10.4 versus 13.1-20.1 kJ mol^(−1)).The variation in apparent BTA sorption to biochar affected by DHA was thus a combination of changes in both its partition and adsorption properties.A modified Dual-mode model including the aqueous concentration of DHA was proposed to predict the effect of DHA on BTA sorption to biochar in different electrolyte solutions,which showed good prediction performance with most BTA sorption coefficient(K_(d),L g^(−1))deviations within 0.1 log unit.

关键词： Emerging organic contaminant Black carbon Dissolved organic matter sorption Site energy distribution

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sorption mechanisms of diphenylarsinic acid on natural magnetite and siderite:Evidence from sorption kinetics,sequential extraction and extended X-ray absorption fine-structure spectroscopy analysis

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Frontiers of Environmental Science & Engineering 2022年第9期16卷 39-52页

作者： Meng Zhu Yuhuan He Xiaobao Wei Haoran Qi Yunpeng Zhang Yijun Zhang Ruyi Yang Yongming Luo School of Ecology and Environment Anhui Normal UniversityWuhu 241002China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation Anhui Normal UniversityWuhu 241002China Center of Cooperative Innovation for Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt Anhui Normal UniversityWuhu 241002China

Diphenylarsinic acid(DPAA)is both the prime starting material and major metabolite of chemical weapons(CWs).Because of its toxicity and the widespread distribution of abandoned CWs in burial site,DPAA sorption by natural Fe minerals is of considerable *** we report the first study on DPAA sorption by natural magnetite and siderite using macroscopic sorption kinetics,sequential extraction procedure(SEP)and microscopic extended X-ray absorption fine-structure spectroscopy(EXAFS).Our results show that the sorption pseudo-equilibrated in 60 minutes and that close to 50%and 20%–30%removal can be achieved for magnetite and siderite,respectively,at the initial DPAA concentrations of 4–100 mg/*** sorption followed pseudo-secondary and intra-particle diffusion kinetics models,and the whole process was mainly governed by intra-particle diffusion and chemical *** and EXAFS results revealed that DPAA mainly formed inner-sphere complexes on magnetite(>80%),while on siderite it simultaneously resulted in outer-sphere and inner-sphere *** analysis further confirmed the formation of inner-sphere bidentate binuclear corner-sharing complexes(^(2)C)for *** of these results with previous studies suggests that phenyl groups are likely to impact the sorption capacity and structure of DPAA by increasing steric hindrance or affecting the way the central arsenic(As)atom maintains charge *** results improve our knowledge of DPAA interactions with Fe minerals,which will help to develop remediation technology and predict the fate of DPAA in soil-water environments.

关键词： Diphenylarsinic acid(DPAA) sorption Magnetite Siderite Sequential extraction EXAFS

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