Polymers
·
2019
·Vol. 11
·期 4
·652
·
IF 3.164
Chen Wang,Jiling Zhao,Shixing Wang,Libo Zhang,Bing Zhang
The selective recovery of gold from wastewater is necessary because it is widely used in various fields. In this study, a new polymeric adsorbent (TP-AFC) was prepared by modifying polyaniline with trimethyl phosphate for the selective recovery of gold from wastewater. Bath experiments were carried out to explore the adsorption capacity and mechanism. The optimum pH of adsorption is 4. The adsorption equilibrium is reached at 840 min. The maximum adsorption capacity is 881 mg/g and the adsorption was a spontaneous endothermic process. The adsorption process fitted well with pseudo second-order kinetic and the Langmuir-models. The single-layer chemisorption governed the adsorption process. In addition, the application in wastewater indicated that the interfering ions had no effect on the adsorption of gold ions. TP-AFC has good selectivity. The interaction mechanism was mainly ion exchange and complexation. In general, TP-AFC was successfully prepared and has an excellent future in practical application.Keywords:Au(III), polymer;wastewater;adsorption;mechanism
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wentao Wang,Xiang Li,Ruyi Wang,Jingjing Wang,Hongxia Deng,Shanshan Tong
The scarcity and economic importance of gold has motivated the researchers to develop novel and efficient adsorbents to the increase of recycling from secondary waste streams. In this work, the three-dimensional (3D) Ti 3 C 2 MXene-POSS/V 2 O 3 @C aerogel (MPVA) with orderly network structure was fabricated by the interfacial assembly of MXene and freezing-induced preassembly. The new MPVA hybrid exhibited ultrafast kinetics (only 10 min to reach equilibrium), selectivity, and excellent trapping capacity for Au (III) , owing to the reductive capture mechanism. The Langmuir model was used to describe the capture of Au (III) delivered by MPVA, achieving the maximum capture capacity of 1425.4 mg g −1 at 298 K. Moreover, MPVA displayed extremely high trapping efficiency (>99.9%) at 273 K, which suggests that this composite is promising for capturing Au (III) in cold temperatures. MPVA also shows good reusability after ten cycles. The results indicate that MPVA has great potential for efficient capturing from complex and cold aqueous solutions.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 2
·159
·
IF 2.935
Chao Xiong,Shixing Wang,Libo Zhang,Ying Li,Yang Zhou,Jinhui Peng
A new adsorbent(A-PGMA) has been synthesized via functionalizing poly(glycidyl methacrylate) microsphere with 2-aminothiazole and used to adsorb gold ions from aqueous solutions. The adsorbent was characterized by X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET), Zeta potential, scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FT-IR). The influence factors such as the pH value of the solution, the initial gold ion concentration and the contact time were examined. Simultaneously, the adsorption process of the gold ion on A-PGMA fitted well with the Langmuir and pseudo-second-order models, respectively. The results showed that the maximum adsorption capacity was 440.54 mg/g and the equilibrium time of adsorption was about 3 h under pH 4. Moreover, the adsorbent has a high reusability after five cycles and good selectivity from coexisting ions, including Zn(II), Mg(II), Cu(II), Ge(IV) and B(III). The adsorption mechanisms of gold ions were ion exchange and chelation between the sulfur and nitrogen groups on the surface of A-PGMA and AuCl4−. Therefore, the adsorbent has a great potential for adsorption of gold ions from aqueous solutions.Keywords:adsorption;gold;reusability;mechanism;selectivity
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
HYDROMETALLURGY
·
2020
·
IF 3.338
Yong Xiang,Shuaiwei Ding,Xiangmeng Chen,Chunmei Cao,Jingping Sun,Li Xu,Guoji Liu
The design and synthesis of highly active adsorption materials for recycling noble metals are essential to the high-tech industry. Here, a new adsorbent material namely resorcinol-formaldehyde-biuret (RFB) is prepared by grafting biuret onto the phenolic. Compared with the traditional methods, the preparation of RFB herein requires no hydrothermal process, which reduces cost. What's more, RFB prepared without the hydrothermal process exhibits better adsorption performance. Specifically, it has a high adsorption capacity of 1334 mg/g at room temperature and a fast adsorption rate that can adsorb a 10 mL of 100 mg/L gold ion solution within 10 min by just 5 mg RFB. Different factors such as pH, coexisting metal ions , and contact time that affects the adsorption process were systematically investigated. FT-IR, SEM, TEM, and XPS were used to characterize the adsorbent before and after adsorption. It is found that the adsorption isotherm and kinetics of RFB are consistent with the Langmuir isotherm model and the pseudo-second-order kinetic model, respectively. Further regeneration and cyclic adsorption indicate that RFB can be recycled at least four times. Besides, the reduction of 4-nitrophenol to 4-aminophenol was realized with the assist of Au-adsorbed RFB (RFB-Au). The strong soft-soft interaction between N, O atoms and Au atoms gives the material excellent gold ion adsorption capacity and selectivity . Findings herein can broaden the application of nitrogen-rich nanomaterials in gold ion recovery.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Tonghui Xu,Yuanlong Guo,Lihua Zhang,Yumei Chen,Yunqi Li,Tianlong He,Songmiao Liang,Lijie Hu,Haibo Xie
The facile preparation of sustainable sulfur-containing polymer functional materials has been obtained great attention due to their chemical reactivity and metal complexing ability. In this study, taking the solution properties advantages of the newly developed cellulose solvent system of DBU/DMSO/CO 2 , thiol and disulfide bond functionalized cellulose ester (TDSCE) was facilely prepared via in-situ tandem transesterification and oxidation reaction by using methyl 3-mercaptopropionate, without adding any external catalyst. The synthetic protocol was featured by that the DBU not only acted as reagent for the dissolution of cellulose, but also catalysts for the transesterification of cellulose with methyl 3-mercaptopropionate to yield cellulose 3-mercaptopropionate (Cell-MP) with maximum degrees of substitution (DS) of 0.77, and an oxidant for the partial oxidation of Cell-MP to produce a cellulose methyl 3,3′-disulfanediyldipropionate (Cell-MDSP) with maximum DS of 0.36 mixed ester, respectively. With successful introduction of thiol and disulfide bond into the cellulose backbone, the TDSCEs indicated desirable selective absorption of Au 3+ from mimic heavy mental ions waste water due to the sulfur-Au chemistry with maximal adsorption capacity for Au 3+ of 415.2 mg/g. The subsequent reduction of Au 3+ into gold nanoparticles (Au NPs) fabricated a robust TDSCE-2@Au NPs composite catalyst with high catalytic activity for the hydrogenation treatment of water pollutes, such as 4-nitrophenol (4-NP)and azo dyes.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Zhen Huang,Minghu Zhao,Shixing Wang,Linqing Dai,Libo Zhang,Chen Wang
A trithiocyanuric-Zr based MOFs adsorbent (ZT-MOFs) was synthesized by using trithiocyanuric acid as a linker and zirconium chloride as a metal matrix and used to recover Au(III). ZT-MOFs was characterized by FT-IR, BET, Raman and FE-SEM. ZT-MOFs are porous material and have good stability in the range of pH 1–9. ZT-MOFs showed a higher adsorption capacity for Au(III) (333.34 mg/g) at 480 min and pH = 7. The experimental data fitted to Freundlich and pseudo second-order models, indicating a heterogeneous multi-layer chemadsorption is the dominated step. ZT-MOFs separated selectively Au(III) from laboratory wastewater containing various interfering ions. The removal rate of Au(III) decreased only from 94.5% to 87.5% after 4 adsorption and desorption cycles. This shows that ZT-MOFs have good repeatability. FT-IR, XPS and Zeta potential data shows that the adsorption mechanism of Au(III) on ZT-MOFs is coordination. Therefore, ZT-MOFs have great potential in extracting Au(III) from wastewater.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2015
·Vol. 141
·期 3
·1098-1104
·
IF 4.107
Xiang Han,Lei Zhao,Dong-En Wang,Juan Xu,Longlong Zhang,Mao-Sen Yuan,Qin Tu,Jinyi Wang
In this paper, we designed and synthesized a novel TBET-based ratiometric fluorescent chemodosimeter, RH-Au, for Au3+. It was found that the probe RH-Au displayed highly selective, sensitive and naked-eye detection upon the addition of Au3+. The probe RH-Au can be used in the pH range 6.0–7.5 and the detection limit was determined to be as low as 2.91 nM (0.57 ppb). We also demonstrated a successful application of imaging Au3+ in living cells using RH-Au.
研究领域:
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yabing Gan,Guoxing Yin,Zhaomin Xu,Huyang Zhou,Ting Yu,Haitao Li,Peng Yin
Gold (Au) and palladium (Pd) species have been widely used in synthetic chemistry, biology, and environmental sciences, raising hard-to-ignore health and environment risks due to their potential toxicity. Herein, a novel dual-functional fluorescent probe was rationally designed and developed for simultaneous quantification and visualization of Au 3+ and Pd species in the environmental and biological systems. Significant fluorescence enhancement at 484 and 606 nm and color changes were observed upon addition of Au 3+ and Pd 0 with high sensitivity. The detection limit for Au 3+ and Pd 0 was as low as 68 nM and 7 nM, respectively. Combined with smartphone chromaticity and dual-channel fluorescence imaging analysis, this probe was successfully applied to the quantification and visualization of Au 3+ and Pd species in real water samples. Thus, simultaneous naked-eye visualization and quantification of Au 3+ and Pd 0 in real water samples was achieved using this probe. The probe was also successfully applied to fluorescence imaging of Au 3+ and Pd 0 in HeLa cells and zebrafish, promoting the monitor and understanding about gold and palladium species in environmental and biological systems.
研究领域:
环境科学
·
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2018
·
IF 4.513
Chao Xiong,Ying Li,Shixing Wang,Yang Zhou
A new adsorbent was prepared via modifying nanosilica with guanidinium ionic liquids for effectively adsorbing gold ions from aqueous solution. Fourier transform infrared spectrometer (FT-IR), thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS) were used to characterize the adsorbent. Batch experiments were applied to investigate the effects of initial pH, initial gold ions concentration, contact time and coexisting ions on the removal of gold ions from aqueous solutions. The adsorbent exhibits an excellent selectivity for gold ions in the presence of Pb(II), Mg(II), Ba(II) and Cu(II) ions. The removal rate of gold ions is higher than 97.06% in the pH ranges from 2 to 5. The maximum uptake was 120.56 mg/g under pH 5. The adsorption kinetic was well described by the pseudo-second-order model. The adsorption isotherm followed Hill model very well. Therefore, the new adsorbent has a potential application in the field of separation of gold ions from aqueous solutions.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2014
·Vol. 1
·期 1
·015033
·
IF 0
Yanyan Chen,Shenjie Li,Lijian Huang,Daocheng Pan
Au+ ions have been successfully incorporated into the lattice of ZnxCd1−xS quantum dots as luminescent centers via an aqueous method. The dopant emission can be tuned in the range of 445 to 570 nm, and the highest quantum yield can reach as high as 30%. Our results showed that Au+ ions can be used as an excellent luminescent dopant in doped quantum dots. Finally, these water-soluble quantum dots can be used directly in PL imaging of HepG2 cells without conjugating any biological targets, indicating a high potential application in bio-labeling.
研究领域:
材料科学
·
生物学
·
医学
✓ 已验证
产品关联
DOI
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Chen Wang,Guo Lin,Jiling Zhao,Shixing Wang,Libo Zhang,Yunhao Xi,Xiteng Li,Ying Ying
A novel adsorbent (UiO-66-TA) was presented by modifying metal-organic framework composites with thioctic acid. UiO-66-TA were characterized by fourier transform infrared (FT-IR), field emission scanning electron microscopy (FESEM), thermogravimetric (TG), Brunner-Emment-Teller (BET) measurement and X-ray photoelectron spectroscopy (XPS), which indicating that it had excellent morphology and specific surface area. The adsorption performances of UiO-66-TA for Au(III) were studied. The results showed that UiO-66-TA had a strong adsorption capacity under acidic conditions and the optimal pH was 2.0. Isotherm and kinetic adsorption were also conducted and found that the experimental values correspond to Langmuir model and pseudo-second-order isotherm model, indicating that the mechanism is mainly chemical adsorption on a uniform surface. Wastewater experiment showed that UiO-66-TA can be used for highly selective recovery Au(III) in actual life. The regeneration and thermodynamic experiments indicated that UiO-66-TA can be reused and were a spontaneous endothermic process. XPS analysis and the zeta potential proved that the main adsorption mechanisms were ion exchange and chelation. DFT calculation found that there are two ways to combine Au with S on UiO-66-TA and their distances are 2.38 Å and 2.39 Å, indicating that the gold and sulfur play a major role in chelation. In summary, UiO-66-TA was a hopeful adsorbent and could be used to collect gold ions from wastewater in a sustainability perspective.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2022
·
IF 4.119
Zhongmin Feng,Chuanyu Zhu,Yupu Meng,Zhuqing Wang
A non-solvent-induced phase separation method was used to synthesize easily separable membrane materials from polyether sulfone and polym-phenylenediamine to achieve selective recovery of Au from e-waste solutions. The optimum conditions, adsorption capacity, and selectivity of the polyether sulfone/polym-phenylenediamine membrane were investigated by adsorption experiments. The maximum adsorption capacity of the PES/PmPD membrane to Au(III) within 4 h at 30 °C with optimal pH of 1 was 582.75 mg/g. The adsorption process follows the quasi-second-order adsorption isotherm. The adsorption agent was characterized by XPS and XRD to understand the recovery mechanism of Au(III) by PES/PmPD membrane. In addition, PES/PmPD membranes were single-selective for Au(III) in a variety of natural water bodies and highly acidic conditions. Therefore, the thin membrane material has great potential for recycling Au(III) from waste e-waste.
研究领域:
环境科学
·
材料科学
✓ 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）