Article
Engineering, Chemical
Ximei Luo, Linping Qi, Shuming Wen, Yunfan Wang, Hao Lai, Qiqiang Lin, Yongfeng Zhou, Xuetong Wu, Zhenguo Song
Summary: This study investigated the adsorption configuration of DDA at the gas-liquid interface and its relationship with foam stability under different conditions. It was found that DDA exhibited extremely high foam stability under strong acidic conditions, reaching its peak at the critical micelle concentration. The key factors affecting DDA foam stability at different pH levels were the interaction intensity between head groups of DDA and water molecules, while at different concentrations, factors included adsorption capacity, interaction intensity, and molecular configuration at the gas-liquid interface.
MINERALS ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Kazuhiro Akutsu-Suyama, Norifumi L. Yamada, Yuki Ueda, Ryuhei Motokawa, Hirokazu Narita
Summary: Knowledge of interfacial structures in liquid-liquid systems is crucial for enhancing two-phase biological and chemical reactions. A new sample cell for neutron reflectometry (NR) was developed to observe the layer structure around the interface. The adsorption behavior of SDS on the toluene-D2O interface was investigated under the new experimental conditions.
APPLIED SCIENCES-BASEL
(2022)
Article
Food Science & Technology
Miaomiao Jiang, Junmin Ji, Yaxin Zhang, Shangde Sun
Summary: Three novel modified activated carbon adsorbents were prepared using different concentrations of sodium dodecyl sulfonate solution. The adsorption mechanism of aflatoxins on the modified activated carbon was systematically investigated. The optimized adsorption conditions for removing four aflatoxins from peanut oil were determined, and the modified activated carbon showed high efficiency in removing AFB1 while retaining the phytosterol content in oils.
Article
Engineering, Chemical
Zhan Ding, Jie Li, Yunxiao Bi, Pan Yu, Huixin Dai, Shuming Wen, Shaojun Bai
Summary: The use of synergistic reagents significantly improves the flotation efficiency of phosphate ore. Experimental results showed that adjusting the dosage and molar ratio of oleamide and SDBS in the mixed collector system can enhance the recovery rate of apatite. The presence of SDBS was found to strengthen the adsorption of oleamide, leading to changes in the chemical state of the apatite surface and improving the flotation effect.
MINERALS ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Huifang Zheng, Yingxin Chen, Xiaoqing Weng, Yanfeng Jin, Richard M. Kasomo, Shunfu Ao
Summary: In the manufacturing of phosphate fertilizer, SDBS has been shown to be a low-cost and effective flotation agent at low temperatures, with a high selectivity for fluorapatite and dolomite. XPS analysis revealed the mechanism of SDBS adsorption on the surface of fluorapatite.
Article
Engineering, Chemical
Runpeng Liao, Shuming Wen, Jian Liu, Shaojun Bai, Qicheng Feng
Summary: This study demonstrates that the use of a DDA/DDTC mixed collector system can significantly improve the flotation performance of smithsonite. The synergistic effect between DDA and DDTC is confirmed, and the mixed collector system contributes to a decrease in solution surface tension. The use of FT-IR and XPS confirms the simultaneous physisorption and chemisorption of DDA and DDTC on the smithsonite surface, and contact angle measurements show that the mixed collector effectively enhances the hydrophobicity of smithsonite. Molecular dynamics simulations reveal the multilayer adsorption of DDTC and DDA on the smithsonite surface, with DDTC promoting the adsorption of DDA.
MINERALS ENGINEERING
(2024)
Article
Polymer Science
Yong Wang, Xinpeng Le, Xingwang Wang, Wenbo Liu, Zhihua Wang
Summary: Through molecular dynamics simulation, an SDBS/HPAM/OH- water-based foam simulation system was constructed to study the influence of chemical agent components on foam stability. The results showed that the foam stability was the highest in the SDBS/HPAM/OH- system, while the addition of HPAM molecules weakened the formation ability of the foam liquid film and restricted the drainage and diffusion of gas molecules.
Article
Chemistry, Physical
Zhihua Wang, Yunfei Xu, Nasir Khan, Chaoliang Zhu, Yanhua Gao
Summary: In this study, the impact of surfactant, polymer, and physical properties of crude oil on the characteristics of oil-based foam was investigated. The aggregation of SDBS surfactant formed micelles on the liquid film of the foam, enhancing the formation ability and stability. The HPAM polymer increased the coverage area of the co-adsorption layer, strengthening the stability. However, an increased HPAM concentration reduced the liquid film formation ability. These findings support the design of new defoaming processes.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Agricultural Engineering
Wenjun Ying, Yong Xu, Junhua Zhang
Summary: The addition of nonionic surfactants strengthens the interaction between substrate and cellulase, leading to increased adsorption capacity and glucose yield. The gas-liquid interface has a negative impact on enzymatic hydrolysis, with the effect varying depending on enzyme loading, shaking speed, and interfacial size.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Chemistry, Multidisciplinary
Danqi Wang, Ruicong Wang, Wencai Peng, Yi Wang, Na Zhang, Yanan Duan, Shiqin Wang, Linye Liu
Summary: The modification of pristine montmorillonite (P-Mt) with sodium dodecyl benzene sulfonate (SDBS) resulted in SDBS montmorillonite (SDBS-Mt), which showed improved adsorption capacity for Cu(II) removal from aqueous solution. Characterization techniques revealed the surface morphology and structure of the materials. The adsorption process was described by the pseudo-second-order kinetic equation and the Langmuir equation. Coexisting cations showed varying degrees of influence on the adsorption of Cu(II). The regeneration performance of the adsorbent was also demonstrated. The main mechanisms of Cu(II) adsorption by SDBS-Mt involved electrostatic attraction, ion exchange, and complexation of sulfonate groups. In conclusion, SDBS-Mt holds promise as a cost-effective adsorbent for Cu(II) treatment in aqueous solutions.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2023)
Article
Engineering, Chemical
Xinzhuang Fu, Zhen Niu, Ya Gao, Zujiang Pan, Rui He, Jilong Zhou, Haisheng Han, Wei Sun, Tong Yue
Summary: In this study, the competitive adsorption mechanisms of sodium humate (SH) and dodecylamine (DDA) on hematite and quartz were quantitatively described and predicted using the surface complexation model (SCM). The results provided insights into the adsorption behavior and equilibrium constants of the reagents, and the reliability of the model was verified. This study contributes to a better understanding of the flotation of minerals and provides valuable data for surface complexation databases.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Multidisciplinary
Michael Tsuei, Hao Sun, Young-Ki Kim, Xin Wang, Nathan C. Gianneschi, Nicholas L. Abbott
Summary: Polyelectrolytes adsorbed at soft interfaces play a significant role in the escape of microdroplets from liquid crystal interfaces. The formation of complexes between polyelectrolytes and surfactants regulates the interfacial charge and microdroplet escape dynamics. These dynamics are influenced by the strength of association between the polyelectrolyte and surfactant, providing insights into the design of responsive soft materials.
Article
Engineering, Chemical
Guangfeng Dong, Peng Chen, Jie Wu, Hao Yi, Tianxing Chen, Feifei Jia, Shaoxian Song
Summary: This study successfully achieved efficient separation of picromerite with a high halite content by employing direct flotation and using sodium dodecyl benzene sulfonate (SDBS) as a novel collector. The flotation tests showed that at an SDBS dosage of 200 g/t, the K+ recovery was 95.89% and the Na+ content in the concentrate was less than 2%. The interaction mechanism between SDBS and picromerite was investigated through various analysis techniques, revealing that SDBS exhibited good selectivity and chemisorbed on the picromerite surface through the formation of O-Mg bonds.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Yilin Yu, Zhixiang Lin, Yijiang Luo, Yingmin Liao, Xiaojia Huang
Summary: This study proposes an adsorbent based on waste material for efficient removal of surfactants from water. The modified adsorbent shows good removal performance for the target surfactant and is applicable to different water sources. The study also reveals that an increase in temperature promotes the removal of surfactants. Additionally, the study demonstrates the feasibility of waste material reutilization.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Analytical
Xue Li, Xiaodan Zhang, Yuming Huang
Summary: Spinel CaCo2O4 nanoplates with high oxidase-mimicking activity at nearly neutral pH were prepared using a hydrothermal-calcination method. CaCo2O4 showed lower electron transfer resistance and enhanced electron transfer rate compared to Co3O4 and CaO, maintaining superior catalytic activity even at neutral pH condition. The oxidase-like activity of CaCo2O4 was 17.0-fold and 31.5-fold higher than Co3O4 and CaO, respectively. A colorimetric platform for SDBS detection under nearly neutral pH was developed based on the inhibition effect of SDBS on the TMB/CaCo2O4 color reaction.
MICROCHEMICAL JOURNAL
(2023)