Colloids and Surfaces C: Environmental Aspects最新文献_第7页

Experimental and molecular dynamics simulation studies on the effect of composite surfactants on the wettability of anthracite coal 复合表面活性剂对无烟煤润湿性影响的实验和分子动力学模拟研究

Colloids and Surfaces C: Environmental Aspects Pub Date : 2024-11-01 Epub Date: 2024-11-03 DOI: 10.1016/j.colsuc.2024.100050

Limin Du , Jun Nian , Jinqi Fu , Xiaoyan Wang , Congcong Peng

{"title":"Experimental and molecular dynamics simulation studies on the effect of composite surfactants on the wettability of anthracite coal","authors":"Limin Du , Jun Nian , Jinqi Fu , Xiaoyan Wang , Congcong Peng","doi":"10.1016/j.colsuc.2024.100050","DOIUrl":"10.1016/j.colsuc.2024.100050","url":null,"abstract":"<div><div>In order to improve the wettability of coal bed water injection, the effects of several composite surfactants on the wettability of anthracite coal were investigated. Firstly, the wettability of different composite surfactants on anthracite was analysed by macroscopic experiments (surface tension and settling time) to determine the optimal concentration and optimal ratio of composite surfactants. Secondly, the effects of adsorption of different composite surfactants on the physicochemical properties of the coal dust surface were investigated by mesoscopic experiments (scanning electron microscopy, energy spectrometer analysis, infrared spectroscopy, X-ray electron spectroscopy and zeta potential), and the results showed that the content of hydrophilic functional groups (Si-O-Si, C-O-C, C-O and C<img>O) on the surface of anthracite coal after treatment with the composite surfactant increased significantly, and the surface potential value decreased significantly in absolute value, agglomerated large coal particles would be formed on the coal surface, and the cracks between coal particles were favourable for the penetration of aqueous solution. Finally, the synergistic mechanism of different composite surfactants was analysed from the perspective of microscopic molecular simulation. The results showed that the composite surfactants enhanced the interaction energy of the coal/composite surfactant/water system, improved the relative concentration distribution of the system, and increased the diffusion coefficient of water molecules. The results of the study can provide valuable guidance for the development of new composite surfactants with wetting effect, which has important application value for mine dust control.</div></div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100050"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mixing behavior and electrical conductivity of diisopropyl amine-water surfactantless emulsions: Implications for the electrokinetic purification of water 二异丙胺-水无表面活性剂乳剂的混合行为和电导率:对水的电动净化的影响

Colloids and Surfaces C: Environmental Aspects Pub Date : 2024-11-01 Epub Date: 2023-11-28 DOI: 10.1016/j.colsuc.2023.100026

Matthew Sing , Alejandro G. Marangoni , Erica Pensini

{"title":"Mixing behavior and electrical conductivity of diisopropyl amine-water surfactantless emulsions: Implications for the electrokinetic purification of water","authors":"Matthew Sing , Alejandro G. Marangoni , Erica Pensini","doi":"10.1016/j.colsuc.2023.100026","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100026","url":null,"abstract":"<div>The water pollutant diisopropylamine (DIPA) creates surfactantless emulsions in water. DIPA droplets bear a negative electrostatic charge, as demonstrated by electrophoretic measurements. Sodium salts (NaCl and Na2SO4) decrease their charge, leading to droplet coalescence and separation into bulk layers, depending on the salt and DIPA percentages. Attenuated total reflectance – Fourier transform infrared spectroscopy (ATR-FTIR) show that the DIPA concentration in the water rich phase is below 10 wt% DIPA when adding 2 wt% Na2SO4 (relative to the mixture) to mixtures of 20 wt%, 40 wt% and 50 wt% DIPA (relative to water). The same occurs when adding 2% NaCl to mixtures of 30 wt%, 50 wt% and 70 wt% DIPA (relative to water). DIPA-water mixtures are electrically conductive and can be separated by subjecting them to an electric field (electrokinetic separation). Without salts, the concentration of DIPA in 30 wt% DIPA could be reduced by ≈ 20 wt% after 60 mins treatment using a differential voltage = 12 V. NaCl (0.25 wt% relative to water) improved efficiency. After 15 mins, the percent decrease in DIPA was ≈ 50 wt%. Electrokinetic treatment targets exclusively contaminants dispersed in water. DIPA sorbs onto clay, alumina and iron oxide minerals, whereas it does not sorb onto gypsum and limestone. Therefore, the in situ electrokinetic separation of DIPA can be most successfully applied in aquifers where the dominant minerals are gypsum and limestone.</div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100026"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138480146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development and characterization of novel CS-ZnO-Alg polyelectrolyte complex for enhanced removal of Cd(II), Cu(II), and Ni(II) from simulated paint industrial wastewater 开发新型 CS-ZnO-Alg 聚电解质复合物并确定其特性，以增强对模拟油漆工业废水中 Cd(II)、Cu(II) 和 Ni(II) 的去除效果

Colloids and Surfaces C: Environmental Aspects Pub Date : 2024-11-01 Epub Date: 2024-07-15 DOI: 10.1016/j.colsuc.2024.100043

Durga Yadav, Joydeep Dutta

{"title":"Development and characterization of novel CS-ZnO-Alg polyelectrolyte complex for enhanced removal of Cd(II), Cu(II), and Ni(II) from simulated paint industrial wastewater","authors":"Durga Yadav, Joydeep Dutta","doi":"10.1016/j.colsuc.2024.100043","DOIUrl":"10.1016/j.colsuc.2024.100043","url":null,"abstract":"<div>In this study, we developed and characterized a novel chitosan-alginate-based polyelectrolyte complex impregnated with zinc oxide nanoparticles (CS-ZnO-Alg PEC) for the enhanced removal of Cd(II), Cu(II), and Ni(II) from simulated paint industrial wastewater. The prepared PEC was characterized by X-ray Diffraction (XRD), Fourier-Transform Infrared (FTIR) Spectroscopy, Scanning Electron Microscopy/Energy Dispersive Spectroscopy (SEM/EDS), X-ray Photoelectron Spectroscopy (XPS), Brunauer-Emmett-Teller (BET), and Thermogravimetric analysis/Differential Thermal Analysis (TGA/DTA). The equilibrium data for said metal ions was best appropriated by Freundlich isotherm with maximum adsorption capacity of 217.72 mg/g for Cd(II), 130.41 mg/g Cu(II), and 159.06 mg/g for Ni(II), illustrating the multilayer adsorption of metal ions on the heterogeneous surface sites of the adsorbent. The kinetics of all three metal ions adsorption process onto discussed PEC was consistent with pseudo-second-order model. The thermodynamics results illustrate exothermic and spontaneous processes for Cd(II) (ΔH° = −3.57 KJ/mol, ΔS° = 0.009 KJ/mol*K, ΔG° = −6.42 to −6.61 KJ/mol) and Cu(II) (ΔH° = −3.32 KJ/mol, ΔS° = 0.006 KJ/mol*K, ΔG° = −5.25 to −5.37 KJ/mol), and spontaneous but less favorable adsorption for Ni(II) (ΔH° = −0.82 KJ/mol, ΔS° = −0.001 KJ/mol*K, ΔG° = −0.39 to −0.36 KJ/mol). Notably, the PEC could be easily recycled and regenerated, maintaining adsorption efficiency after five cycles. Overall, the CS-ZnO-Alg PEC, due to its amphoteric nature, high adsorption efficiency, cost-effectiveness, excellent recyclability, and biodegradability, could be a promising adsorbent for paint industrial wastewater.</div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100043"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141693758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On improving the climate change impact of surfactant-based cleaning products: Were you aware of the potential impact of fragrances? 改善基于表面活性剂的清洁产品对气候变化的影响：您是否意识到香料的潜在影响？

Colloids and Surfaces C: Environmental Aspects Pub Date : 2024-11-01 Epub Date: 2023-12-04 DOI: 10.1016/j.colsuc.2023.100027

Franco Doro

{"title":"On improving the climate change impact of surfactant-based cleaning products: Were you aware of the potential impact of fragrances?","authors":"Franco Doro","doi":"10.1016/j.colsuc.2023.100027","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100027","url":null,"abstract":"<div>Life cycle assessments of home and personal care consumer products, carried out in the last 20 years, have provided insights and disclosed blind spots that prompted product developers to make significant changes in product format, formulation, and packaging, leading to more sustainable consumer products. However, fragrances are often overlooked in terms of interconnectedness with key environmental footprint parameters of consumer products. In this article we show that fragrance ingredients could be relevant for reducing the climate change impact of the full consumer product, defined as Global Warming Potential at 100 years (GWP100), and at the same time drive olfactory differentiation. To illustrate this, a comparison was drawn between the GWP100 for typical surfactants commonly used in the European market and the GWP100 for fragrance ingredient proxies, using in both cases GWP100 data extracted from the literature. Fragrance proxies were synthesized using two methods: a continuous flow process (scenario 1) and batch-type processes (scenario 2), representing optimal and non-optimal synthesis approaches, respectively. The findings revealed that fragrance ingredients synthesized through less efficient processes could approach the environmental impact of surfactants. The article delves as well into the complexities posed by fragrance concentration, solubilization, and fragrance delivery in the development of novel sustainable formulations.</div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100027"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138557709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnetically recyclable hydrothermal biochar functionalized with β-CD for simultaneous capturing of cationic methylene blue and auramine O in wastewater 用 β-CD 功能化的磁性可回收水热生物炭同时捕获废水中的阳离子亚甲基蓝和金胺 O

Colloids and Surfaces C: Environmental Aspects Pub Date : 2024-11-01 Epub Date: 2024-04-12 DOI: 10.1016/j.colsuc.2024.100033

Hui Wang , Shumian Wei , Junru Li, Xuefei Wang, Xiaodong Wang, Bingchun Xue

{"title":"Magnetically recyclable hydrothermal biochar functionalized with β-CD for simultaneous capturing of cationic methylene blue and auramine O in wastewater","authors":"Hui Wang , Shumian Wei , Junru Li, Xuefei Wang, Xiaodong Wang, Bingchun Xue","doi":"10.1016/j.colsuc.2024.100033","DOIUrl":"https://doi.org/10.1016/j.colsuc.2024.100033","url":null,"abstract":"<div>The highly efficient and recoverable magnetic hydrothermal biochar (β-CD@MHBC) was prepared by combining red sandalwood and β-cyclodextrin, and was used for removing methylene blue (MB) and auramine O (AO) dyes in the single and binary systems. The physical and chemical properties of the β-CD@MHBC were characterized using SEM-EDS, BET, XRD, VSM, FT-IR, and XPS techniques. Batch adsorption studies revealed that the obtained maximum adsorption capacities of β-CD@MHBC for MB and AO in the single system were 303.1 and 400.0 mg g−1, while in the binary system were 151.1 and 169.1 mg g−1 under the optimal conditions of pH 6, 1.0 g L−1 dosage, 150 mg L−1 dye concentration and adsorption time of 180 min, indicating the presence of competitive adsorption with AO possessing stronger affinity in the binary system. The adsorption behaviors of MB and AO could be well described by the Langmuir isotherm model and pseudo-second-order kinetic model in both single and binary systems. The possible adsorption mechanism involved pore filling, electrostatic attraction and hydrogen bonds between β-CD@MHBC and dye molecules. Furthermore, the spent β-CD@MHBC displayed excellent reusability and stability with removal efficiencies of 94 % for MB and 83 % for AO after five cycles of adsorption-desorption. In summary, the prepared β-CD@MHBC with excellent adsorption property and regeneration performance could have great potential for continuous removal of target pollutants in actual wastewater treatment.</div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100033"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140606933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single and binary adsorption of azo blue and mordant black 17 with vermiculites functionalized by amphoteric gemini surfactants: Performance and mechanism 两性双子表面活性剂官能化的蛭石对偶氮蓝和媒染黑 17 的单吸附和双吸附：性能和机理

Colloids and Surfaces C: Environmental Aspects Pub Date : 2024-11-01 Epub Date: 2024-01-10 DOI: 10.1016/j.colsuc.2024.100028

Xin Jin , Qing Zhao , Jiafeng Miao , Fuan Guo , Manglai Gao

{"title":"Single and binary adsorption of azo blue and mordant black 17 with vermiculites functionalized by amphoteric gemini surfactants: Performance and mechanism","authors":"Xin Jin , Qing Zhao , Jiafeng Miao , Fuan Guo , Manglai Gao","doi":"10.1016/j.colsuc.2024.100028","DOIUrl":"https://doi.org/10.1016/j.colsuc.2024.100028","url":null,"abstract":"<div>Incorporation of amphoteric gemini surfactants into vermiculite (Vt) is a valuable task in developing clay application. Hereby amphoteric gemini surfactants with hydrophobic alkyl chains, dual N+ head groups and anionic functional groups are introduced to prepare organo-Vts as dye adsorbents. The adsorbents are labeled as TAES-Vt with sulfonic acid group and TABS-Vt with benzenesulfonic acid groups, respectively. Both single and binary adsorption towards azo blue (AB) and mordant black 17 (MB17) have been investigated. The max uptake amounts in single dye system are 189/177 mg/g for AB and 278/406 mg/g for MB17 by TAES-Vt/TABS-Vt, respectively. Furthermore, the presence of AB is favorable for the removal of MB17 in binary dye system, with adsorption capacities increasing to 449/469 mg/g by TAES-Vt/TABS-Vt. However, MB17 exhibits an antagonistic effect on adsorption of AB, thus resulting lower AB removal capacities in binary dye system. The adsorption mechanisms are elucidated via adsorption, characterization and calculation. (i) Hydrophobic interaction, electrostatic interaction, H-bond, and electron donor effect all support the adsorption for AB/MB17. (ii) Compared to TABS-Vt, TAES-Vt has a slightly higher adsorption capacity for large-sized AB due to its larger interlayer spacing. However, TABS-Vt is better at adsorbing small-sized MB17 than TAES-Vt by vitue of additional benzene ring that can provide π-π interaction. (iii) In view of adsorbates, the difference of molecular size and structural property in AB and MB17 also affect adsorption. This work provides ideas for the multi functionalization of Vt, reviving the adsorption advantages of clay based materials.</div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100028"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139468117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced photocatalytic activity and stability of 2D Cs3Bi2Br9 perovskite nanosheets synthesized via modified antisolvent method 通过改良反溶剂法合成的二维 Cs3Bi2Br9 包晶石纳米片的光催化活性和稳定性得到增强

Colloids and Surfaces C: Environmental Aspects Pub Date : 2024-11-01 Epub Date: 2023-11-22 DOI: 10.1016/j.colsuc.2023.100024

Mohamed Masri , K.B. Girisha , Abdo Hezam , Talal F. Qahtan , Khaled Alkanad , Faten Masri , K. Namratha , Udayabhanu , Kullaiah Byrappa

{"title":"Enhanced photocatalytic activity and stability of 2D Cs3Bi2Br9 perovskite nanosheets synthesized via modified antisolvent method","authors":"Mohamed Masri , K.B. Girisha , Abdo Hezam , Talal F. Qahtan , Khaled Alkanad , Faten Masri , K. Namratha , Udayabhanu , Kullaiah Byrappa","doi":"10.1016/j.colsuc.2023.100024","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100024","url":null,"abstract":"<div>Cs3Bi2Br9 perovskite has attracted tremendous research attention in the field of photocatalysis due to its promising light-harvesting properties. However, its practical applications are hindered by water-induced degradation, limiting stability and photocatalytic activity. In this study, we address this challenge by synthesizing stable 2D Cs3Bi2Br9 nanosheets through a modified anti-solvent reprecipitation method. Optimizing the isopropanol amount enabled unprecedented synthesis of 2D Cs3Bi2Br9 nanosheets. SEM and HRTEM images show 2D stacked nanosheets of the sample prepared using 250 mL of isopropanol, while bulks and agglomerations were noticed in the samples prepared using different amounts of isopropanol. The Cs3Bi2Br9 nanosheets exhibits the lowest charge recombination rate, hence achieving the highest degradation ratio of methylene blue, removing ∼80 % of the dye within 90 min under visible light attributed to their stability, facilitating efficient charge separation. Our study sheds light on the pivotal role of 2D morphology in enhancing the stability and photocatalytic performance of Cs3Bi2Br9.</div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"2 ","pages":"Article 100024"},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139050092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Batch and continuous mode adsorption of methylene blue cationic dye onto synthesized titanium dioxide/polyurethane nanocomposite modified by sodium dodecyl sulfate 十二烷基硫酸钠改性二氧化钛/聚氨酯纳米复合材料对亚甲基蓝阳离子染料的间歇连续吸附

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-07-11 DOI: 10.1016/j.colsuc.2023.100012

Amireh Bavi , Mohammad Sadegh Jafari , Maryam Heydari , Farbod Ebrahimi , Amin Sadeghizadeh

{"title":"Batch and continuous mode adsorption of methylene blue cationic dye onto synthesized titanium dioxide/polyurethane nanocomposite modified by sodium dodecyl sulfate","authors":"Amireh Bavi , Mohammad Sadegh Jafari , Maryam Heydari , Farbod Ebrahimi , Amin Sadeghizadeh","doi":"10.1016/j.colsuc.2023.100012","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100012","url":null,"abstract":"<div>In this study, we synthesized and characterized a modified polyurethane (PUF) adsorbent using Sodium Dodecyl Sulfate (SDS) and TiO2-PUF nanocomposite. The adsorption performance of these modified PUF adsorbents was evaluated for the removal of Methylene Blue (MB) dye from wastewater. Optimum values and conditions for the adsorption process were determined based on the maximum dye adsorption (temperature 25 ℃, equilibrium contact time 180 min, adsorbent dose 0.2 g, pH 9 and initial concentration 120 mg/L). The surface-modified PUF adsorbent exhibited significantly enhanced adsorption capacity, increasing from 6.25 to 20.12 mg/g compared to the pure PUF. Langmuir and Freundlich adsorption isotherm models were applied, with the Langmuir model providing the best fit (R2 = 0.99) and a maximum adsorption capacity of 120.48 mg/g of the adsorbent. Thermodynamic studies indicated an exothermic adsorption process, while the pseudo-second-order kinetic model dominated the adsorption kinetics. Continuous experiments at optimized conditions revealed an optimum flow rate of 15 mL/min and a bed height of 2 cm for efficient dye uptake. The adsorbent demonstrated good regeneration and reusability over more than 3 cycles. The modified PUF adsorbent showed great potential for MB dye adsorption. Surface modification significantly improved the adsorption capacity, and the Langmuir model accurately described the adsorption behavior. These findings contribute to our understanding of PUF adsorbents and their applicability for wastewater treatment.</div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100012"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49709270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Thermal evolution of biochar in nature: A potential mode to enhance the self-cleaning of environmental DOC 生物炭在自然界中的热演化:一种增强环境DOC自洁性的潜在模式

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-10-30 DOI: 10.1016/j.colsuc.2023.100021

Kang Peng , Chen Liu , Ming Chen , Yuying Zhang , Yumei Dai , Xin Zhou , Wenhao Chen

{"title":"Thermal evolution of biochar in nature: A potential mode to enhance the self-cleaning of environmental DOC","authors":"Kang Peng , Chen Liu , Ming Chen , Yuying Zhang , Yumei Dai , Xin Zhou , Wenhao Chen","doi":"10.1016/j.colsuc.2023.100021","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100021","url":null,"abstract":"<div>Biochar often undergoes multiple thermal processes. Thermal evolution is described in this study as the process by which biochar in the environment changes again in a thermal environment. In this study, the thermal evolution process of biochar was studied by characterization test. The results showed that the oxygen content in biochar increased after thermal evolution, mainly due to functional groups such as O-H and C-O, while the functional groups of C<img>O did not change significantly. Micro-pores will be generated in biochar after thermal evolution, which will increase the surface area and significantly enhance the adsorption capacity. The biochar was added to natural water to observe how biochar enhanced the removal of dissolved organic carbon (DOC). The concentration of DOC was reduced by about 6.68 mg/L by SB 800, and most of the components were humus, which indicated that the thermal evolution of biochar promoted the removal of DOC. The Electron spin resonance (ESR) test shows that after thermal evolution, biochar has more oxygen-containing carbon center persistent free radicals due to the increase of C-O functional groups in biochar. Under visible light, persistent free radicals in oxygen center are formed by electron transition, which can undergo a variety of reactions with water to form reactive oxygen species.</div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100021"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134657195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Understanding the process in the removal of dimethylarsenic by a zirconium-based nanoparticle 了解锆基纳米粒子去除二甲基砷的过程

Colloids and Surfaces C: Environmental Aspects Pub Date : 2023-11-01 Epub Date: 2023-08-02 DOI: 10.1016/j.colsuc.2023.100016

Dandan Zhao , Chen Fu , Zhenglian Wu , Yang Yu

{"title":"Understanding the process in the removal of dimethylarsenic by a zirconium-based nanoparticle","authors":"Dandan Zhao , Chen Fu , Zhenglian Wu , Yang Yu","doi":"10.1016/j.colsuc.2023.100016","DOIUrl":"https://doi.org/10.1016/j.colsuc.2023.100016","url":null,"abstract":"<div>Organic arsenic contamination in groundwater and surface water is one of threats to human beings. In this study, a novel zirconium-based nanoparticle was developed to remove dimethylarenic acid (DMA) from aqueous solution. The adsorption behavior was evaluated by various batch adsorption experiments. The pH effect study revealed that the maximum adsorption was achieved around pH 3.0. The ionic strength did not have significant effect on the uptake of DMA. The adsorption kinetics study showed that the adsorption equilibrium was established within 24 h; an intraparticle kinetics model fit the experimental data well. In the adsorption isotherm study, the Langmuir equation described the adsorption data better than the Freundlich equation; the maximum adsorption capacity of the sorbent was calculated to be 58.82 mg-As/g at the optimal pH. In the natural organic matters and coexisting anions effect studies, the presence of humic acid and coexisting anions have little effect on the uptake of DMA. The performance of the Zr-based NP was not largely inhibited in the presence of NOMs and coexisting anion. The FTIR and XPS spectroscopic analyses demonstrated that DMA was successfully adsorbed onto the sorbent and the adsorption mechanism was proposed to be ions exchange between arsenic and sulfate ions.</div>","PeriodicalId":100290,"journal":{"name":"Colloids and Surfaces C: Environmental Aspects","volume":"1 ","pages":"Article 100016"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49709459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0