AICHE JOURNAL
·
2024
·
IF 3.5
Guimei Zhou,Wenjun Yan,Shufan Yan,Dandan Gao,Debin Zeng,Dongdong Li,Dewen Zeng
Solvent extraction of lithium by β-diketones from alkaline brine has been known to be an efficient process. However, its relatively high working pH, consequently the high alkaline consumption and substantial dissolution loss in raffinate, limit its industrial application. Herein, a novel lithium extractant, i.e., 2-hydroxy-5-nitro-4- n -octoxy-benzophenone (referred to as N531), was proposed, which can extract lithium at relatively lower pH with remarkable low alkaline consumption and dissolution loss. Exactly, the pH corresponding to half lithium extraction is 8.5, and the Li/Na separation factor is ~500. The extractant concentration in the raffinate varied from 0.8 to 9.3 mg L −1 , depending on the pH and salinity. An application case was given to extract lithium from the raw brine of Zabuye salt lake, indicating that N531 is a commercially prospective extractant to extract lithium from alkaline brine.
研究领域:
化学工程
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Xinyan Suo,Bowen Yu,Jinting Sha,Runbo Gao,Mengyao Qi,Yehao Huang,Weijun Peng,Xiao Guo,Wei Wang,Yijun Cao,Chongqing Wang,Yukun Huang
Amine ether was initially used as a novel collector for the direct flotation of quartz to separate the quartz from feldspar under weak alkaline conditions. The flotation results demonstrated that the recovery differences between quartz and feldspar both decreased with the increase in the carbon chain length and number of alkoxy groups of amine ether. A recovery difference of nearly 90 % could be achieved between them at a pulp pH of 8.0 with dodecylamine polyoxyethylene ether (AC1210) serving as the collector. The results of the mechanism analysis demonstrated that AC1210 was effectively adsorbed on the quartz surface via electrostatic interaction and hydrogen bonding. However, the electrostatic repulsion between the K + on the feldspar surface and positively charged NH + groups of AC1210 weakened the adsorption of AC1210 on the surface of feldspar. The difference in the adsorption capacity of AC1210 between the quartz and feldspar promoted the selective direct flotation of quartz from the mixture of quartz and feldspar.
研究领域:
矿物加工工程
·
表面化学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Shiyu Zhang,Runnan Zhang,Runlai Li,Zixuan Zhang,Yafei Li,Hao Deng,Junhui Zhao,Tianrun Gu,Mengying Long,Xiaoyao Wang,Sui Zhang,Zhongyi Jiang
Positively charged nanofiltration membranes hold great potential in Li + /Mg 2+ separation, but their application in alkaline solutions, such as alkaline salt-lake brines has not been reported. Herein, inspired by the arginine's unique structure and biological function, we explore superstrong basic triaminoguanidine (TG) molecule as aqueous monomer to fabricate positively charged polyamide nanofiltration membranes for Li + /Mg 2+ separation. With the Li + /Mg 2+ mass ratios of 1:50 and 1:120, at pH 9.6, the separation factors (S Li,Mg ) of membranes reach 31.8 and 20.9. Meanwhile, at pH 5.6, the S Li,Mg are 46.4 and 36.4, which are the ever-reported highest value and such high S Li,Mg can be well retained in the pH range of 5.6–8.6. The superior Li + /Mg 2+ selectivity stems from the superhigh protonation capacity of guanidine groups in a broad pH range.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2016
·
IF 2.208
Yue Sun,Peng Zuo,Junfen Luo,Rajendra Prasad Singh
Two novel weakly basic anion exchange resins (SZ-1 and SZ-2) were prepared via the reaction of macroporous chloromethylated polystyrene-divinylbenzene (Cl-PS-DVB) beads with dicyclohexylamine and piperidine , respectively. The physicochemical structures of the resulting resins were characterized using Fourier Transform Infrared Spectroscopy and pore size distribution analysis. The adsorption behavior of SZ-1 and SZ-2 for benzenesulfonic acid (BA) was evaluated, and the common commercial weakly basic anion exchanger D301 was also employed for comparison purpose. Adsorption isotherms and influence of solution pH, temperature and coexisting competitive inorganic salts (Na 2 SO 4 and NaCl) on adsorption behavior were investigated and the optimum desorption agent was obtained. Adsorption isotherms of BA were found to be well represented by the Langmuir model. Thermodynamic parameters involving Δ H , Δ G and Δ S were also calculated and the results indicate that adsorption is an exothermic and spontaneous process. Enhanced selectivity of BA sorption over sulfate on the two novel resins was observed by comparison with the commercial anion exchanger D301. The fact that the tested resins loaded with BA can be efficiently regenerated by NaCl solution indicates the reversible sorption process. From a mechanistic viewpoint, this observation clearly suggests that electrostatic interaction is the predominant adsorption mechanism. Furthermore, results of column tests show that SZ-1 possesses a better adsorption property than D301, which reinforces the feasibility of SZ-1 for potential industrial application.
研究领域:
化学工程
·
环境科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lihao Liu,Suiqin Li,Kai Li,Jiahui He,Yuhang Wang,Jieyu Wang,Ying Chen,Yinjie Xu,Mengxin Wang,Yongyong Cao,Xing Zhong,Jianguo Wang
The selective electrocatalytic oxidation of alcohols (EOA) to aldehydes under weak alkaline conditions offers sustainable synthetic routes. However, a deficiency in basicity inevitably leads to diminished electrocatalytic efficiency, and the dynamic reconstruction mechanism of the electrocatalyst remains insufficiently researched. Herein, the NiMoO x -COOH electrocatalyst/4-acetamido-TEMPO (ACT) synergistic system was employed for the efficient EOA under weak alkaline. In situ studies reveal electric double layer-driven metal/ligand co-leaching induces in situ dissolution-redeposition of metal, forming active Ni 2 (CO 3 )(OH) 2 . Experimental and Density functional theory (DFT) studies confirm a synergistic electrocatalytic mechanism between NiMoO x -COOH and ACT. The reconstructed Ni 2 (CO 3 )(OH) 2 promotes ACTH surface adsorption, thereby facilitating the turnover cycle of ACT. Therefore, outstanding EOA electrocatalytic performance has been achieved (500 mA/cm 2 , 96 % high yield, maintaining 30 cycles for benzyl alcohol oxidation, 15 substrate examples and 100 g scales synthesis). This work offers a promising approach to achieving high-performance EOA under weak alkaline.
研究领域:
材料科学
·
电化学
·
催化反应
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产品关联
DOI
高影响因子
JOURNAL OF FOOD PROCESS ENGINEERING
·
2018
·Vol. 42
·期 2
·e12969
·
IF 1.955
Wu Zhong,Xinyue Li,Hong Yang,Erhu Li
In this study, an effective deacidification process for kiwifruit wine using ion exchange resins was investigated. Static adsorption experiments were conducted to screen an appropriate resin and optimize the volume ratio of resin to wine. Dynamic adsorption experiments were conducted to optimize the flow rate. Sensory and chemical analysis of the deacidified kiwifruit wine were also performed. The results demonstrated that 330 resin with a maximum adsorption capacity decreased total acid and citric acid to 4.32 and 1.39 g/L in kiwifruit wine. The acid adsorption process fitted Ho's sorption kinetic model well. The volume ratio of the 330 resin to wine and the feed flow rate were further optimized to be 1:30 and 4 mL/min. Kiwifruit wine with total acid and citric acid contents of 7.98 and 4.74 g/L was obtained, under optimum conditions, while preserving alcohol, vitamin C (Vc), flavonoids and phenol content, and improving the flavor. Practical applications The high acidity in kiwifruit wine depress the sensory quality and attraction to consumers. Resins are applied for liquid treatment because of high efficiency, insolubility and low cost. This work showed that 330 resin treatment is a promising method to deacidify kiwifruit wine and provided an economical and effective processing method for kiwifruit processing enterprises. Monitoring acidity change and kiwifruit wine quality help enterprises better control the process. Furthermore, the easy removal of resins will greatly reduce energy consumption, resulting in lower processing cost.
研究领域:
食品科学
·
化学工程
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产品关联
DOI
高影响因子
ADSORPTION SCIENCE & TECHNOLOGY
·
2019
·
IF 1.2
Yue Sun,Weisheng Zheng,Deqiang Yin
Two novel weakly basic anion exchange resins BNH and BN2 bearing two different functional groups was fabricated via the two-step amination of chloromethylated polystyrene-divinylbenzene beads with dibutylamine and dimethylamine. The adsorption properties of BNH and BN2 for the 2-naphthalenesulfonic acid (NSA) removal from wastewater were compared with two synthesized monofunctional anion exchange resins BN0 and BN6 (derived from dimethylamine and dibutylamine, respectively). The experimental data revealed that the adsorption process on the four resins fitted well with the pseudo-second-order kinetics equation and the equilibrium isotherms were in good agreement with the Langmuir model. Thermodynamic analyses illustrated that 2-naphthalenesulfonic acid adsorption onto resins was an endothermic and spontaneous process. Importantly, BN2 still displayed relatively high adsorption capacity in the existence of Na2SO4, indicative of an excellent selectivity for 2-naphthalenesulfonic acid over sulfate than other resins. The obtained results elucidate that BN2 could have potential industrial application in effluent disposal fields because of its superior selectivity, acceptable kinetics, and desorption capability.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
ENVIRONMENTAL ENGINEERING SCIENCE
·
2017
·Vol. 34
·期 7
·528-535
·
IF 1.426
Yue Sun,Deqiang Yin,Junfen Luo,Yan Xu,Aimin Li
A novel weakly basic anion exchange resin AEC-5 bearing two differently sized functional groups was prepared through chloromethylated PS-DVB copolymer beads reaction with a mixture of dibutylamine and dimethylamine. To better understand the benefits of AEC-5 for removing benzenesulfonic acid (BSA) from aqueous solution, adsorption properties of BSA on AEC-5 were compared with two monofunctional anion exchange resins, a commercial exchanger D301 derived from dimethylamine and a synthesized resin AEC-4 derived from dibutylamine. Adsorption isotherms and effect of solution pH, temperature, time, and coexisting Na2SO4 on sorption behavior were investigated and column adsorption-regeneration tests were carried out. AEC-5 showed a greater adsorption capacity than both monofunctional anion exchangers for BSA in the presence of Na2SO4. Equilibrium and kinetic data could be well matched with the Langmiur isotherm model and pseudo-second-order model respectively. AEC-5 had better adsorption kinetics than AEC-4. Thermodynamic parameters were also analyzed and results indicate that BSA adsorption on AEC-5 is an exothermic and spontaneous process. AEC-5 is very likely to be a potential alternative adsorbent, which is believed to possess an excellent selectivity for BSA over sulfate, acceptable kinetics, and desorption characteristics, for its application in industrial wastewater treatment.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2025
·Vol. 48
·期 9
·e70109
·
IF 1.6
Pengfei Yao,Guangpin Lin,Yi Su,Li Shu,Yingpin Wen,Fengli Yang
The isomerization of glucose catalyzed by attapulgite (ATP) modified by MgCl 2 was investigated. The catalytic performance of ATP on glucose isomerization was significantly enhanced after MgCl 2 modification (Mg-ATP), achieving a fructose yield of 36.5 % and a selectivity of 90.2 % in an aqueous system at 120 °C for 1 h. Combined with the characterization results, it could be concluded that the microstructure of ATP has been changed after MgCl 2 modification, leading to an increase in surface area and the number of weak basic sites, which are beneficial for the glucose isomerization reaction.
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yue Sun,Deqiang Yin,Jintao Duan,Rajendra Prasad Singh
Weak base anion exchangers are promising for decontamination of aromatic ionizable organic compounds (AIOCs) from industrial wastewaters. However, the effect of alkyl chain length of an amine functional group of resins on decontamination process has rarely been clarified to the best of our knowledge. In the present study, a commercially available weak base anion exchange resin D301 and two newly synthesized ones AEC-2 and AEC-4 with a varying alkyl chain length of amine functional groups (derived from dimethylamine, diethylamine and dibutylamine, respectively) were used for adsorption of ^-naphthalene sulfonic acid (NSA). Adsorption isotherms and influence of solution pH, temperature, time and coexisting competitive inorganic salt (Na 2 SO 4 ) on adsorption behavior were investigated and the column adsorption-regeneration tests were carried out. Results showed that adsorption selectivity for NSA over sulfate increased with increasing the alkyl chain length in the high saline water. But the sorption velocity decreased to a moderate extent with increasing the alkyl chain length. Thermodynamic parameters indicate that adsorption is an exothermic and spontaneous process, and NSA adsorption onto AEC-4 is an enthalpy-driven process, while that of D301 as well as AEC-2 is an enthalpy- and entropy-driven simultaneous process. Further, results of column tests validate long alkyl chain enhancing the sorption selective for NSA and suggest the sorption process can be reversible.
研究领域:
环境工程
·
水处理化学
·
吸附科学
·
功能高分子材料
·
工业废水治理
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Linglu Gao,Qing He,Jinfeng Xing,Zhiqiang Ge
Doxorubicin (DOX) originated from users’ urine has been an emerging environmental pollutant due to its significant genotoxicity to mankind. Thus, urine source separation is a potential strategy to isolate DOX at a higher concentration and reduce the burden of downstream wastewater treatment . To develop highly efficient, easy separation and retrievable materials for individual patient to conveniently remove DOX from own urine, magnetic Cu 3 (PO 4 ) 2 nanoflowers were prepared through anchoring amino-functionalized magnetic nanoparticles on the Cu 3 (PO 4 ) 2 nanoflowers. Characterizations revealed the magnetic nanoflowers were spherical in shape with a mean size of 15 μm, and porous and hierarchical in structure. Magnetic nanoparticles located the surface of petals. Multibatch experiments were performed to assess the removal performance of DOX from aqueous solution. The magnetic nanoflowers exhibited excellent removal efficiency of DOX under weakly alkaline condition at ambient temperature. Linear and non-linear analyses were carried out to compare the best fitting kinetics and isotherms. Sorption kinetic data best fitted the pseudo-second order model. The Freundlich isotherm explained equilibrium sorption data with R 2 = 0.993 higher than that for the Langmuir isotherm. When the pH of synthetic urine was adjusted to weakly alkaline (pH 8.0–9.0), over 95% of DOX (20 mg L −1 ) was removed by a little of magnetic nanoflowers (50 mg L −1 ) within 5 min. Meanwhile, the magnetic nanoflowers could be easily separated and recovered from the synthetic urine by a magnet. So, for individual urine source separation strategy, the magnetic nanoflower seems to be an efficient, convenient and inexpensive approach to remove DOX from human urine.
研究领域:
环境科学
·
纳米技术
·
废水处理
·
药物学
·
材料科学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2019
·Vol. 10
·期 1
·1-10
·
IF 11.878
Chen Yihua,Li Nengxu,Wang Ligang,Li Liang,Xu Ziqi,Jiao Haoyang,Liu Pengfei,Zhu Cheng,Zai Huachao,Sun Mingzi,Zou Wei,Zhang Shuai,Xing Guichuan,Liu Xinfeng,Wang Jianpu,Li Dongdong,Huang Bolong,Chen Qi,Zhou Huanping
Further minimizing the defect state density in the semiconducting absorber is vital to boost the power conversion efficiency of solar cells approaching Shockley-Queisser limit. However, it lacks a general strategy to control the precursor chemistry for defects density reduction in the family of iodine based perovskite. Here the alkaline environment in precursor solution is carefully investigated as an effective parameter to suppress the incident iodine and affects the crystallization kinetics during film fabrication, via rationale adjustment of the alkalinity of additives. Especially, a ‘residual free’ weak alkaline is proposed not only to shrink the bandgap of the absorber by modulating the stoichiometry of organic cation, but also to improve the open circuit voltage in the resultant device. Consequently, the certified efficiency of 20.87% (Newport) is achieved with one of the smallest voltage deficits of 413 mV in the planar heterojunction perovskite solar cell.
研究领域:
材料科学
·
太阳能
·
半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）