Pigment & Resin Technology
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2021
·Vol. 52
·期 1
·123-133
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IF 1.263
Jun Zhang,Xiaojian Ou,Lin Li,Qianqian Chen,Zifan Zhang,Ting Huo,Xiaoyu Lin,Fangfang Niu,Shengyuan Zhao,Fang We,Hui Li,Chunli Liu,Zhenbin Chen,Sujun Lu,Peng Zhang,Jinian Zhu
Purpose A novel grafted temperature-responsive ReO 4 − Imprinted composite membranes (Re-ICMs) was successfully prepared by using polyvinylidene fluoride (PVDF) resin membranes as substrates, this study aimed to separate and purify ReO effectively. Design/methodology/approach Re-ICMs were synthesized by PVDF resin membranes as the substrate, acrylic acid (AA), acrylamide (AM), ethylene glycol dimethacrylate (EGDMA) were functional monomers. The morphology and structure of Re-ICMs were characterized by scanning electron microscope and Fourier transform infrared spectroscopy. Findings The maximum adsorption capacity toward ReO 4 − was 0.1,163 mmol/g and the separation decree had relation to MnO 4 − was 19.3. The optimal operation conditions were studied detailedly and the results as follows: the molar ratios of AA, AM, EGDMA, ascorbic acid, NH4ReO 4 , were 0.8, 0.96, 0.02, 0.003 and 0.006. The optimal time and temperature were 20 h and 40°C, respectively. The Langmuir and pseudo-second-order models were fit these adsorption characteristics well. Practical implications Rhenium (Re) is mainly used to chemical petroleum and make superalloys for jet engine parts. This study was representing a technology in separate and purify of Re, which provided a method for the development of the petroleum and aviation industry. Originality/value This contribution provided a novel method to separate ReO 4 − from MnO 4 − . The maximum adsorption capacity was 0.1163 mmol/g at 35°C and the adsorption equilibrium time was within 2 h. Meanwhile, the adsorption selectivity rate ReO 4 − /MnO 4 − was 19.3 and the desorption rate was 78.3%. Controlling the adsorption experiment at 35°C and desorption experiment at 25°C in aqueous solution, it could remain 61.3% of the initial adsorption capacity with the adsorption selectivity rate of 13.3 by 10 adsorption/desorption cycles, a slight decrease, varied from 78.3% to 65.3%, in desorption rate was observed.
研究领域:
材料科学
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环境科学
·
化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yinshan Zhang,Yingcai Wang,Guolin Huang,Zhibin Zhang,Yunhai Liu
Technetium-99 ( 99 Tc), predominantly exists as the form of hypermobile 99 TcO 4 − anion, poses dual issues in separation interference and environmental pollution risks in nuclear wastewater. This study engineered a hydrospongel adsorbent through emulsion-templated polymerization and a new concept of swelling-induced pore reconfiguration (SIPR) was defined. The long-standing trade-off between adsorption rate and capacity get to reconcile driven by SIPR strategy. Interconnected pore construction effectively minimized trans -scale mass transfer resistance while the specific recognition sites anchored in internal get fully exposure, enabling record 99 TcO 4 − uptake kinetics (equilibrium within 5 min) and exceptional saturation capacity (884.95 mg g −1 ) in shapeable adsorbents. Integrating experiments and density functional theory (DFT) reveal dual mechanism of molecular electrostatic-chelating assisted ion exchange trapping 99 TcO 4 − . This adaptive design overcame the dual restrictions of spatial-scale and steric hindrance of adsorption sites in traditional adsorbents, establishing a paradigm for interconnected pore polymer adsorbents expand into engineering applications in nuclear wastewater remediation.
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Surfaces and Interfaces
·
2022
·
IF 6.137
Pengwei Zhao,Xiaoyuan Zhou,Yalin Huang,Yuwei Xu,Shanyong Chen,Chengbin Zheng,Yongdong Jin,Chuanqin Xia
Removal of TcO 4 − from liquid radioactive waste is urgent due to its long half-life and high mobility. Herein, two guanidine-based cationic covalent organic polymers (TG-TPAL-H and TG-TPAL-OMe) were synthesized, and were used to research for the removal of ReO 4 − . TG-TPAL-H showed high removal efficiency, its sorption capacity got to 549 mg g −1 and distribution coefficient K d was 1.17 × 10 6 mL g −1 . What impressively, the TG-TPAL-H removed 80% of ReO 4 − even there was 1000 times of competing anions (Cl − , SO 4 2− , H 2 PO 4 − ). While TG-TPAL-OMe showed a poor performance on ReO 4 − with the capacity of 317 mg g −1 and K d of 6.9 × 10 4 mL g −1 . TG-TPAL-H can remove 87% ReO 4 − from simulated Hanford LAW stream sample, while TG-TPAL-OMe just can remove 35%. The difference between the two materials can be attributed to the electron donating group (Methoxy) in TG-TPAL-OMe reduced the positive charge density of guanidine, which was demonstrated by the ESP of density functional theory (DFT) calculation.
研究领域:
材料科学
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环境科学
·
放射化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Xiaoyong Xia,Jiaqing Huang,Qimeng Sun,Jinkai Qiu,Parada Weaoseng,Chanat Chokejaroenrat,Cheng Lian,Qingfeng Xu,Jianmei Lu
A cage-like multi-imidazolium sorbent is designed for 99 TcO 4 − /ReO 4 − capture. • Cooperative clamping in confined spaces enables ultrafast adsorption kinetics. • The sorbent exhibits a high ReO 4 − uptake capacity of 730 mg g −1 . • Excellent selectivity is achieved in highly competitive nuclear waste media. • Composite beads allow efficient fixed-bed removal with good regenerability. The efficient and selective removal of pertechnetate ( 99 TcO 4 − ) from water remains a significant challenge due to its high solubility, low charge density, and competition from coexisting anions. Herein, we report tetraphenylethene (TPE)-based, imidazolium-functionalized nanomicrospheres for pertechnetate ( 99 TcO 4 − )/perrhenate (ReO 4 − ) capture with high efficiency. The nonplanar, propeller-like TPE core stereospecifically arranges multiple imidazolium sites in a semi-encapsulating/polyhedral fashion, generating size-complementary pockets. Hierarchically confined nano-spaces enable cooperative multi-imidazolium clamping, where hydrophobic effects, electrostatic attraction, ion exchange, multipoint C–H···O hydrogen bonding, and geometric confinement act in concert to afford precise recognition and strong binding. Using ReO 4 − as a nonradioactive surrogate for 99 TcO 4 − , the sorbent delivers ultrafast kinetics (11.23 g mg −1 min −1 ), high capacity (730 mg g −1 ), and 86.5% removal from Hanford low-activity waste (LAW) stream. The powder is readily formed into mechanically robust granules and shows excellent regenerability in fixed-bed tests, retaining >95% efficiency after multiple cycles. This work demonstrates that cooperative multi-imidazolium clamping within confined nano-spaces amplifies multimechanism synergy, providing a general strategy for precise recognition and strong binding of weakly coordinating anions. Propeller-like TPE-based cage-like microspheres spatially organize multiple imidazolium sites into confined binding pockets, enabling cooperative multi-site clamping for rapid and selective ReO 4 − / 99 TcO 4 − capture through hydrogen bonding, electrostatic attraction, ion exchange, and hydrophobic confinement. Download: Download high-res image (184KB) Download: Download full-size image
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiaoyang Liu,Na Zhang,Zhen Dong,Jifu Du,Lifang Peng,Long Zhao,Miao Yang
Technetium ( 99 Tc) is a main long-lived radionuclide of nuclear waste, which poses a great threat to the environment and human health. The reasonable disposal of 99 Tc is vital important. In this paper, a series of novel materials (SMILR m , m = 0, 1/500, 1/200, m is the molar ratio of IL to RAFT reagent) was synthesized by radiation-induced grafting combined with reversible addition-fragmentation chain transfer (RAFT) polymerization. The adsorption performance of SMILR m to 99 Tc were investigated. The graft polymerization process is controlled by the RAFT reagent, resulting in a restricted dispersion of SMILR m molecular weight. With the increase of RAFT reagent content, the grafting yield (GY) decreased. The addition of RAFT reagent increases the specific surface area of the adsorbent, accelerates the adsorption rate, increases the adsorption capacity, but reduces the adsorption selectivity. Especially, the adsorption of SMILR 0 was a single step adsorption and obeyed Langmuir adsorption model, while SMILR m (1/500, 1/200) showed a stepwise adsorption isotherm model. SMILR m exhibited excellent recyclability and could efficiently capture Re O 4 - from a simulated Beishan groundwater in dynamic experiments. Finally, XPS and FT-IR analysis confirmed that the adsorption was an ion exchange mechanism. The results showed that SMILR m are suitable for the effective removal of Re O 4 - / T c O 4 - from radioactive wastewater with complex composition.
研究领域:
环境科学
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核化学与放射化学
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Fan Zhang,Qi Zheng,Yachao Tan,Fan Wang,Khalid A.M. Salih,Ningchao Zheng,Mohammed F. Hamza,Shunyan Ning,Yuezhou Wei,Xiangbiao Yin
Currently, the primary approach for treating radioactive isotopes all over the world is a great challenge. The impact of this treatment is to transform liquid radioactive wastewater (present in huge volume) into low-volume solid radioactive waste. The current work presents synthesis and application of novel adsorbent using β-lactoglobulin fibrils (βFs) on SiO 2 particles and activated carbon particles (AC particles), which considered as facile and ecologically conscious. βFs were produced by denaturing inexpensive β-lactoglobulin. This method of filtering was used for radioactive waste, which differs from most prior adsorption techniques. Polyethyleneimine (PEI) was grafted onto protein fibrils using polydopamine (PDA). The produced material shows highly removal performance of TcO 4 - under both acidic and alkaline conditions (up to 99.76 %, with filtering time of just 5–6 min). This membrane exhibits a superior preference for TcO 4 - over certain common competing ions, including SO 4 2- , NO 3 – , and Cl - . The hybrid membrane achieves maximum adsorption performance for the substituted ion ReO 4 - of 533 mg/g, which is higher than the most commonly used fiber materials. Furthermore, βFs-PDA + PEI fibrils can efficiently treat up to 8000 kg of wastewater per kg and exhibit remarkable reusability performance. This membrane’s simple production, efficient performance, and excellent selectivity make it ideal to be implemented in both hospitals and nuclear power plants.
研究领域:
环境科学
·
核工程
·
材料科学
·
废物管理
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高影响因子
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