NEW JOURNAL OF CHEMISTRY
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2024
·Vol. 48
·期 38
·16683-16691
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IF 2.7
Xiaoyu Cao,Huifang Yang,Jihui Luo,Jianxian Zeng,Zhanfang Cao,Xiaoping Huang
Highly efficient and selective extraction of silver ions from wastewater remains a formidable challenge in ensuring public health and protecting ecosystems. Herein, an acyl-based thiourea extractant known as N-benzoyl-N′,N′-dibutyl thiourea (BDBTU) was used for the selective extraction of silver ions from aqueous solution by a solvent extraction method. BDBTU displayed an outstanding extraction efficiency of Ag(I) with an extraction ratio of 96.7% under the optimal extraction conditions, surpassing its effectiveness for Cu(II) and Mn(II) ions. In addition, BDBTU retained high effectiveness even after undergoing eight regeneration cycles, with only a slight decrease in the extraction efficiency from 96.7% to 95.2%. Moreover, it displayed selective extraction towards Ag(I) ions under the interference of metal ions (i.e., Cu(II), Pb(II), Mn(II), Zn(II), Ni(II), Co(II) and Na(I)). The investigation into the extraction mechanism of BDBTU towards Ag(I) unveiled that BDBTU provided a high affinity for Ag(I) accompanied by the formation of Ag–O–C and Ag–S–C bonds. These results indicated that the exceptional extraction stability and selectivity of BDBTU offer promising prospects for diverse applications, highlighting its potential in silver-containing wastewater treatment fields.
研究领域:
环境科学
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化学工程
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分析化学
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材料科学
✓ 已验证
DOI
高影响因子
SOLVENT EXTRACTION AND ION EXCHANGE
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2023
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IF 2
Dong Cao,Shuai Wang,Xin Ma,Jia Yang,Hong Zhong
Herein, a novel C=O–NOH-contained compound was synthesized and used in the extraction and recovery of copper from sulfate solution. Dodecyl phenyl ethyl hydroxamic acid (DPEHA) exhibited high selectivity to Cu(II) over the competing ions, and the separation factors (β) obtained were βCu/Zn = 227.370, βCu/Co = 199.094, βCu/Ni = 188.889, respectively. The separation effect was stronger than that of 2-hydroxy-5-nonyl acetophenone oxime. Meanwhile, extraction capacity of 0.10 g Cu(II) per gram DPEHA was reached, and the extracted Cu(II) can be stripped effectively. The investigation of extraction mechanism revealed that O atoms in C=O and O-H groups of DPEHA operate as active sites, which could powerfully chelate with Cu(II) by forming stable five-membered rings. The high copper extraction efficiency and selectivity associated with a simple synthesis of DPEHA make it to serve as the potential selective Cu(II) extractant, which also provide a novel insight for the research and development of economical Cu(II) extractants.
研究领域:
化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Shuang Sun,Yuefeng Deng,Ji Chen,Rui Qin,Zhongte Du,Qianshun Wen,Yang Meng
With the amid surging demand for lithium, solvent extraction has gradually developed into a key method for lithium recovery in industry. Due to the problems of large dissolution loss and high extraction equilibrium pH of β -diketone system, di-(2-ethylhexyl) phosphinic acid (P227) was selected to recover Li + from the desorption solution of salt lakes (SL-DS). Compared with di-2-ethylhexyl phosphoric acid (P204), 2-ethylhexyl phosphoric acid mono 2-ethylhexyl ester (P507), and bis (2,4,4-trimethylpentyl) phosphinic acid (Cyanex272), P227 showed better separation ability for Li + and Na + . The extraction conditions, including saponification degree, initial pH, extractant concentration and phase ratio were studied. It could be found that the extraction efficiency of Li + was maintained at a high level in the initial pH range of 2.25–12.61. A cascade process consisting of eight-stage extraction and five-stage scrubbing was performed to verify the feasibility of this technology. 99.9 % of Li + from the SL-DS was extracted at the equilibrium pH of 7.60, and P227 exhibited superior selectivity for Li + over Na + . Moreover, under the optimal condition of 3.8 mol/L HCl and O/A of 20:1, the stripping ratio of Li + reached 99.76 % via a four-stage stripping experiment. The Li + concentration of stripping liquor attained 23.11 g/L and a high-purity (99.5 %) Li 2 CO 3 product was obtained by precipitation. After five cycles, P227 demonstrated excellent regeneration stability. Eventually, the composition of extraction complex was revealed as LiR•NaR by slope analysis, and the cation exchange mechanism was further confirmed using FT-IR and 31 P NMR.
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产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2023
·
IF 4.8
Junlian Wang,Lu Liu,Guodong Xu,Fan Li
Highly selective extraction of Pd from leaching liquor of spent auto-catalysts is a research hotspot in recent years. In this study, three novel octanethioic acid alkyl amide extractants (alkyl = butyl TA-804, hexyl TA-806 and 2-ethylhexyl TA-826) were designed, synthesized and characterized by 1 H NMR, FT-IR and ESI-HRMS. The effect of contact time, extractant concentration, HCl concentration and diluents on Pd selective extraction and separation by these three extractants were investigated. The stripping behaviors of the loaded Pd in the organic phase were examined. The McCabe-Thiele diagrams of Pd extraction and stripping were drawn. The extraction mechanism was studied through methods of stoichiometry calculation, slope analysis, FT-IR and ESI-HRMS. In the end, the Pd separation from simulated leaching liquor of spent auto-catalysts by TA-804, TA-806 and TA-826 was carried out. The results show TA-826 has much slow Pd extraction kinetics than TA-804 and TA-806. They all have highly efficient extraction and separation performance for Pd from chloride media at acidities of [HCl] ≤ 3 mol/L. When the HCl concentration is ≥4 mol/L, Fe and Pt begin to be extracted. At any acidities, Rh, Zn, Al, La, Zr, Co, Cu, Ni, Ce and Mg are not extracted. The studied octanethioic acid alkyl amides extract Pd from chloride media via complexation mechanism. Two extractant molecules quantitatively extract one Pd. The loaded Pd are easily and efficiently stripped by thiourea. They can efficiently extract and highly separate Pd from leaching liquor of spent auto-catalysts at acidity of 3 mol/L HCl.
研究领域:
化学工程
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无机化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2017
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IF 3.359
Qihua Shi,Yimin Zhang,Jing Huang,Tao Liu,Hong Liu,Luyao Wang
New extractant and an extractant system are attractive for liquid-liquid extraction. To improve the extraction efficiency and selectivity, the binary extractant system consisting of bis-2-ethylhexyl phosphoric acid (D2EHPA) and 2-ethylhexylphosphonic mono-2-ethylhexyl (PC88A) was explored to separate vanadium (V) via synergism from multi-element sulphuric acid leaching solution in this study. The optimal proportion and concentration of extractant was investigated and results demonstrated that the maximum synergistic co-efficient was 1.52 by adjusting the volume ratio to 14:6 (D2EHPA/PC88A) when the extractant concentration was 20% (v/v). Next, the selectivity of the mixture was investigated at different pH values and contact time, which demonstrated better separation of vanadium from primary impurities compared with extraction by D2EHPA or PC88A alone. Furthermore, the Fourier Transform Infrared (FT-IR) spectra were employed to analyse the mechanism of extraction. The results suggested that the cation exchange (P OH bands) and coordination reaction (P O bands) contribute to vanadium extraction, and the structure of extracted complex was proposed. The formation of a dimer between D2EHPA and PC88A was demonstrated. Finally, after multi-stage counter-current extraction and stripping, V 2 O 5 product with a high purity of 99.07% was obtained by oxidation, precipitation and calcination.
研究领域:
化学工程
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环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
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IF 6.97
Zhiyong Zhou,Haotian Liu,Jiahui Fan,Xueting Liu,Yafei Hu,Yulei Hu,Yong Wang,Zhongqi Ren
Sodium phosphomolybdate with a spatial stereo symmetry structure and stability in acid and alkali was used as a new coextraction agent for separating Li+. In addition, methyl isobutyl ketone and tributyl phosphate were used as diluent and extractant, respectively. The influence of operation conditions on separation performance of lithium ion was investigated. The single stage extraction efficiency of Li+ was 58.74% with the volume fraction of tributyl phosphate, O/A phase ratio, and molar ratio of sodium phosphomolybdate to lithium as 40%, 3.6, and 1, respectively. Then the cross-flow and saturated extraction experiments were conducted. When 0.2 mol/L LiCl + 1.8 mol/L NaCl solution was used as washing agent and O/A phase ratio was 3, the washing efficiency of Mg2+ reached up to 99.59%. When 0.26 mol/L HCl solution was used as stripping agent and O/A phase ratio was 3, the stripping efficiency of Li+ reached 98.3%. The difference in extraction efficiency was within 6.5% through 10 recyclings of the organic phase, indicating that the coextraction agent was very stable. The extraction mechanism was investigated and the binding ability of P═O in tributyl phosphate molecule followed the sequence Li+ ≫ Na+ > K+ > Mg2+.
研究领域:
化学工程
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材料科学
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环境化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Yujuan Sun,Jun Wu,Xiashi Zhu
A novel poly[1-vinyl-3-benzyltriethylammonium proline ionic liquid] membrane(PIL/PVDF membrane) were prepared through the blending poly[1-vinyl-3-benzyltriethylammonium proline ionic liquid](P[Pro][TEA])-poly(vinylidene fluoride)(PVDF) phase inversion method. A series of PIL/PVDF membrane characterization (NMR, FT-IR, SEM, EDS, and XPS) was performed. The properties of PIL/PVDF membrane (contact angle, water flux, mechanical properties, thermal stability,electric charge property, specific surface area and pore diameter) were evaluated. A solid phase extraction − high performance liquid chromatography (SPE-HPLC) method for separation/analysis of quercetin was developed. The factors affecting the adsorption and elution (time, dosage, pH etc.) were investigated. Under optimal conditions, the method has been successfully applied to the separation/analysis of quercetin in tea, and the recovery rates are satisfactory (86.4–106.0 %). The concentration factor of quercetin was 10. The adsorption capacity of PIL/PVDF membrane towards quercetin was 22.1 mg g −1 . The extraction mechanism was preliminarily discussed. The established SPE-HPLC method was simple and reliable, which provided application prospects for extraction and detection of quercetin.
研究领域:
材料科学
·
分析化学
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膜技术
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药物分析
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）