SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Xiaoyu Wang,Hanlin Shao,Zhihao Chen,Xiaoshuang Yin,Yun Chen,Ying Liu,Wenzhong Yang
Herein, we presented a facile method for enhanced boron removal based on PEI-grafted defective MOF-808 (D-MOF-808/PEI). The rich Zr OH bonds, amino-functionalized surface, and exposed metal defects of D-MOF-808/PEI endow it with the high adsorption capacity of boron. Due to the ligand exchange at metal defects and boron-imine/amine groups complexation, D-MOF-808/PEI exhibits exceptional selectivity for boron with the saturation adsorption of 95.30 mmol·g −1 at 45 °C. Additionally, negligible interference from other coexistent ions and excellent reusability promote the application of D-MOF-808/PEI practically for the rapid and high selectivity removal of boron from complex environmental samples. This work furnishes a promising strategy for boron contamination and expands the application potential of defective MOF-based adsorbents for environmental remediation.
研究领域:
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
Desalination and Water Treatment
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2024
·
IF 1
Ying Zhang,Xule Chen,Miao Dong,Meiyan Li,Chengwen Wang,Yanzong Zhang
During the process of oilfield wastewater reuse, residual Boron in fracturing flowback fluid will lead to premature crosslinking with gelling agents, resulting in excessive viscosity at the front end of the fracturing fluid configuration. This phenomenon has heavily influenced the reuse of wastewater. Electrocoagulation (EC), as an effective approach to decreasing Boron concentration, has been widely studied, while further research of Boron removal from complicated wastewater is required to optimize. EC parameters were investigated to explore the optimal Boron removal effect of Fe, Al and Fe-Al three combined anodes. Under 46.3–57.2 mA/cm 2 , 90 min and pH of 9, Fe-Al anodes exhibit the best effect of Boron removal (84% ± 1.5%). Furthermore, high adaptive capacity of low current density and suitable pH confirm the best choice of Fe-Al combined anodes. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) demonstrate the complexation between Boron and metallic oxide. Finally, the common removal of various pollutants including Ca, Cl, K and Na further conduces to the reuse of oil wastewater.
研究领域:
环境科学
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
JOM
·
2015
·Vol. 68
·期 9
·2371-2380
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IF 1.757
Lai Huixian,Huang Liuqing,Lu Chenghao,Fang Ming,Ma Wenhui,Xing Pengfei,Li Jintang,Luo Xuetao
Boron removal from metallurgical-grade silicon by Li 2 O-SiO 2 slag refining under an air atmosphere was experimentally investigated to explore the potential of this method for achieving high boron removal. The boron concentration in the refined silicon was studied under different conditions of holding time, slag composition, and mass ratio of slag to silicon. The boron concentration in metallurgical-grade silicon was successfully reduced from 8.6 ppmw to 0.4 ppmw after slag refining for 0.5 h at 1973 K when the mass ratio of the 60 wt.% Li 2 O-40 wt.% SiO 2 slag to metallurgical-grade silicon was 3. It was proposed that the addition of CaF 2 decreased the activity of silica, which brings about a negative effect on the boron removal capacity of Li 2 O-SiO 2 slags. Moreover, the reaction mechanism and kinetics of boron removal were further studied. Analysis of the boron concentration in the resulting slag after refining revealed that the primary boron removal approach was that a large amount of boron was oxidized and then volatilized to the atmosphere in the form of gaseous borates. Based on the two-film theory, the total mass transfer coefficient of boron was determined to be 2.3 × 10 −2 μ m/s.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
·
IF 6.76
Tao Song,Qinglong Luo,Fengfeng Gao,Bing Zhao,Xiaogang Hao,Zhong Liu
Technical research on electrochemical acid-free desorption of boron is imminent, and layered nickel hydroxide is a potential boron-responsive active electrode material. In this paper, nickel hydroxide was used to remove boron from aqueous resources by electro-assisted and conventional adsorption methods. The option of conditions by nickel hydroxide adsorption for boron is mild (pH: 7 ∼ 9) with an exothermic process. Interestingly, the synergistic effect of physical and chemical adsorption improves the adsorption rate and adsorption capacity of nickel hydroxide for boron under the action of the electric field, and the adsorption performance is better at low voltage (0.2 ∼ 0.4 V). The equilibrium time of the electro-assisted method is 4 times shorter than conventional adsorption methods, and the maximum adsorption capacity can reach 57.5 mg/g than conventional adsorption (45.4 mg/g). In addition, the nickel hydroxide has selectivity in high-concentration anion solutions and can be easily regenerated by an alkaline solution. Therefore, it is expected that nickel hydroxide with the electro-assisted method could be a potential approach for the high-efficiency and eco-friendly removal of boron.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 42
·21193-21206
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IF 9.931
Xueping Liao,Bingyu Wang,Qiang Zhang
The high-affinity interactions between cis-diols and boric/boronic acid have been widely employed as a tool for carbohydrate analysis, protein separation and boron removal. Herein we report the design and synthesis of cyclodextrin-scaffolded glycopolymers as bifunctional nanosponges for boron removal and water treatment for the first time. Different glycopolymer nanosponges (GNs) have been successfully synthesized from monosaccharides and β-cyclodextrin via a combination of a cross-linking reaction, Fischer glycosylation and a click reaction. Such functional GNs are mesoporous polymer frameworks with cis-diol-containing saccharides immobilized on the surface, which have exhibited selective adsorption behaviour towards boric acid depending on the structure of the GNs and the loaded saccharides. The GNs have also shown remarkable adsorption rates and capacities for an organic dye as a model pollutant in this work. Secondary bonding, such as hydrogen bonding and van der Waals forces between the immobilized saccharides and the adsorbates is believed to be responsible for the significantly enhanced adsorption rates and capacities. Such bifunctional materials may exhibit potential applications in seawater desalination and water treatment.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
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2024
·
IF 1
Yannan Jia,Jiacheng Li,Zijie Wang,Xiaomei Wu,Kai Xu,Zheng Wang
Metal-organic framework UiO-66-NH 2 was studied as an adsorbent for effective boron removal from desalination seawater for the first time. First, UiO-66-NH 2 was synthesized using the solvothermal method and then characterized in terms of N 2 adsorption/desorption isotherms, zeta potential, scanning electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, and thermogravimetric analysis. Based on the experimental design of response surface methodology, the adsorption of boron on UiO-66-NH 2 was optimized using three independent variables: adsorbent dosage (60–80 mg/L), pH (5–7), and temperature (298–318 K). Under the optimized conditions, the maximum adsorption capacity was predicted to reach 24.54 mg/g. Investigation of the kinetics and isotherms revealed that the pseudo-second-order kinetics model and the Langmuir isotherm can well cover the adsorption data of boron. Thermodynamic parameters showed that the adsorption of boron by UiO-66-NH 2 is spontaneous and feasible. UiO-66-NH 2 also exhibits good reproducibility. It is a highly practical sorbent that can be used to remove boron from desalination seawater.
研究领域:
环境科学
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材料科学
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化学工程
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水处理技术
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吸附科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Ruxue Duan,Xiang Lv,Wentao Yan,Yong Zhou,Congjie Gao
The effective removal of boron from water is highly desirable for many chemical processes. Reverse osmosis (RO) membrane technology has been considered to be a competitive technology for boron removal. However, in addition to seawater, RO membrane technology is rarely used in the treatment of other industrial wastewaters containing boron. In this work, a high boron removal RO membrane with broad industrial application prospect was developed. Specifically, sulfonate groups were grafted onto the surface of the RO membrane through the acetal reaction of polyvinyl alcohol (PVA) with benzaldehyde disulfonic acid disodium salt (BADSA Na). In this process, PVA was coated on the membrane surface in advance. The possibility that large complexes can form due to the reaction between PVA and boric acid and the characteristic of the sulfonate group which can decrease the hydrogen bonding sites work together to reduce the rate of boron diffusion, and then a high boron removal rate is achieved. Under seawater conditions, the boron removal rate of the membrane was improved obviously from 85.71% to 91.63%, while a high flux of 44.41 L m −2 h −1 and a high salt rejection of 99.63% was maintained. In addition, the membranes developed were able to maintain excellent boron removal performance in three other industrial water scenarios (geothermal water, nuclear power plant wastewater and oilfield fracturing flowback fluid). Furthermore, the overall performance of the membrane is better than that of other commercially available membranes and existing processes, showing that the membrane developed has a bright promise for various industrial applications.
研究领域:
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 JOURNAL
·
2023
·
IF 15.1
Wenqing Wang,Hao Li,Yongquan Zhou,Jianming Pan
The emulsion method is a typical way for the preparation of nanomaterials, however, it usually requires a lot of energy and surfactants to form and stabilize of emulsions. A critical factor limiting its application is to control the morphology of the material by modulating the size of the emulsion droplets. In this work, a novel solid-water–oil (S-W-O) system based on the integration of metastable emulsion and salt template method was proposed, and the functionalized silica nanosheets were prepared by the one-pot method. The size of the prepared nanosheets is relatively uniform, with a length of 800 to 1200 nm and a width of about 200 nm. Subsequently, a large number of epoxy group sites were introduced into the nanosheets relying on distillation precipitation polymerization, and the polyol groups were successfully loaded. Finally, the polyol-functionalized nanosheet adsorbent (NS@GMA-NMDG) was obtained and applied for the rapid removal of boron. NS@GMA-NMDG shows favorable adsorption performance for boric acid in solution, with a maximum adsorption capacity of about 35.49 mg g −1 based on the Langmuir model fitting and a fast adsorption rate of about 30 min to reach 96.3% of the adsorption equilibrium concentration. Remarkably, the investigation of the formation mechanism of nanosheets reveals that salt plays an important role in the S-W-O system. This study not only puts forward a novel method of designing and synthesizing nanosheet adsorbents, but also the application of surfactant-free and low-energy emulsification reflects the concepts of energy saving and clean production, which provides fresh inspirations for the development of new environmentally friendly adsorbents.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Han Zhang,Hanshu Sun,Yiping Zhao,Yang He,Li Chen
Grafting hyperbranched polymers on polymer membrane surfaces offers a promising route to desalination and boron removal. However, the functional modulation of hyperbranched polymers is still not fully realized, and the specific selective synthesis of terminal hydroxyl groups still needs further exploration. Here, we report a method to prepare high-performance adsorption membranes using hyperbranched polyglycerol (HPG) that can optimize the dendritic distribution of the terminal hydroxyl groups. Poly(caffeic acid) (PCA) was rapidly deposited on the surface of the poly(ether sulfone) (PES) membrane assisted by copper sulfate (CuSO4) and hydrogen peroxide (H2O2), and subsequently, HPG was grafted onto PCA coatings via a covalent bond. The prepared functional modified membrane exhibited excellent performance on salt and boron removal; especially, the maximum boron uptake was 1.661 mmol g–1 at an initial boron concentration of 5.0 mmol L–1, better than most of the traditional adsorption membranes reported. The boron adsorption on the membranes was fitted well with the pseudo-first-order adsorption kinetic model and Langmuir isothermal model. Strikingly, the regeneration efficiency could be recovered to 97% after 10 cycles of acid rinsing and desorption. The functional membrane had good application potential and research value in seawater desalination and boron removal.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2020
·Vol. 96
·期 2
·465-473
·
IF 2.75
Boxian Chen,Fuzhi Li,Xuan Zhao
BACKGROUND Reverse osmosis (RO) plays an increasingly important role in boron removal. In this study, novel polyamide RO membranes and modules with high boron rejection were fabricated by cross-linked glutaric dialdehyde (GA) grafting. To evaluate the influence of GA grafting on membrane materials, the surface properties before and after modification were analyzed. RESULTS The results showed that the membrane morphology changed distinctly after GA modification. All modified membranes became more hydrophilic as the water contact angle decreased from 60° to 35°. The zeta potential of RO membrane surface increased from −6.23 mV to 17.27 mV, which indicated that the surface charge altered from negative to positive. The rejection of boron increased from 76.65% to 90.14% and the boron permeability coefficient decreased from 3.71 to 0.79. Furthermore, the rejection of boron for modified module was >90% over a 5–22 ppm range of boron concentration. The rejection of boron also stabilized at ≈90% beyond 3000 min. CONCLUSION The modified RO membrane modules with high boron rejection and acceptable flux could be used in boron removal. The approach in this study can improve the separation properties of boron for commercially available modules without disassembling. © 2020 Society of Chemical Industry (SCI)
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Shuhao Wang,Shaosuo Bing,Haoyong Zhang,Yong Zhou,Lin Zhang,Congjie Gao
Tailoring excellent polyamide (PA) seawater reverse osmosis (SWRO) membranes for boron (B) removal is a key challenge. Herein, we developed a facile surface engineering design strategy to improve the boron removal and desalination performance of SWRO membranes by controlling the reaction kinetics of interfacial polymerization. The functional groups and density of the oligomers covering the surface of PA skeleton were tuned to reduce the pore size and hydrogen bonds interaction inside the PA active layer with an enhanced the selectivity of the membranes. The designed membrane exhibits a high boron removal rate of 95.34%, while displaying a NaCl rejection of 99.8% and an acceptable water flux. This work offered a basic framework for the design of outstanding SWRO membranes, and also provided some insights for the formation and structure-property relations of polyamide membranes based on interfacial polymerization.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Tongtong Pan,Gan Li,Rujie Li,Xiangmei Cui,Weidong Zhang
The remediation of environmental boron contamination has received extensive research attention. The adsorbent ECH@NGM aerogel with high hydrophilic and mechanical properties was synthesized to remove boron. The ECH@NGM aerogel had a high adsorption capacity of 81.11 mg/g, which was 14.50% higher than that of commercial boron-selective resin Amberlite IRA743. The Freundlich model and pseudo-second-order model described the adsorption behavior well. In addition, the response surface methodology (RSM) could predict the experimental outcomes and optimize the reaction conditions, and X-ray photoelectron spectroscopy (XPS) and control tests were utilized to investigate probable adsorption mechanisms. These data showed that the B ← N coordination bond was the primary adsorption force. The adsorbent had good resistance to interference from coexisting salts, high reusability, good adsorption performance even after five reuse cycles, and a high desorption rate in a relatively short time. The adsorption performance in real brines could be maintained at 80%. Therefore, this work not only provided ECH@NGM aerogels for the removal of boron from brine but also elucidated the main adsorption processes between N-containing adsorbents and boron, facilitating the design of future adsorbents for boron removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）