Small
·
2021
·Vol. 17
·期 30
·2100490
·
IF 13.281
Karthick Ramalingam,Qiang Wei,Fuming Chen,Kaixiang Shen,Mengjun Liang,Jinhong Dai,Xianhua Hou,Qiang Ru,Ganguli Babu,Qinyu He,Pulickel M. Ajayan
Solar-assisted electrochemical desalination has offered a new energy–water nexus technology for sustainable development in recent studies. However, only a few reports have demonstrated insufficient photocurrent, a low salt removal rate, and poor stability. In this study, a high-quality freshwater level of 5–10 ppm (from an initial feed of 10 000 ppm), an enhanced salt removal rate (217.8 µg cm −2 min −1 of NaCl), and improved cycling and long-term stability are achieved by integrating dye-sensitized solar cells (DSSCs) and redox-flow desalination (RFD) under light irradiation without additional electrical energy consumption. The DSSC redox electrolyte (I − /I 3 − ) is circulated between the photoanode (N719/TiO 2 ) and intermediate electrode (graphite paper). Two DSSCs in parallel or series connections are directly coupled to the RFD device. Overall, this hybrid system can be used to boost photo electrochemical desalination technology. The energy–water nexus technology will open a new route for dual-role devices with photodesalination functions without energy consumption and solar-to-electricity generation.
研究领域:
环境科学
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能源材料
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电化学工程
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可持续发展技术
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水资源处理
✓ 已验证
DOI
高影响因子
Environmental Science-Water Research & Technology
·
2023
·Vol. 9
·期 9
·2368-2377
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IF 5
Minxian Han,Lufan Tang,Yidong Xiao,Minzhang Li,Hedong Chen,Prayoon Songsiriritthigul,Than Zaw Oo,Mono Zaw,Nyein Wint Lwin,Su Htike Aung,R. Karthick,Fuming Chen
Redox mediators facilitate electrochemical deionization with higher energy conversion efficiency and open new opportunities for efficacious water desalination. Among the various redox-active species employed for electrochemical deionization, the typical anionic iron-based [Fe(CN)6]3−/4− redox couple is well-known for its high salt removal rate, compatibility at neutral pH, fast kinetics and low membrane permeability. However, [Fe(CN)6]3−/4− forms precipitates with the Mg2+, Ca2+ and Fe3+ ions present in seawater and poses safety issues due to the release of the highly toxic HCN(g) in an acidic environment. Herein, we propose the complexation of Fe(II/III) with the malonate ligand (i.e., [Fe(Mal)2]−/2− redox couple) to perform both redox flow desalination (RFD) and flow-electrode capacitive deionization (FCDI). In the FCDI architecture, carboxylated multi-walled carbon nanotubes (MWCNT-COOH) were mixed with the [Fe(Mal)2]−/2− redox couple, which served as the electrochemically active electrode. The average salt removal rate of the RFD and FCDI processes reached up to 4.43 and 4.84 μg cm−2 s−1 at an applied current density of 7 and 11 mA cm−2, respectively. Furthermore, the ferrous malonate redox couple was tested for the desalination of seawater (feed: 35 000 ppm NaCl), which showed a reasonable 0.7-fold decrease in salinity. Our work presents the desalination performance of the [Fe(Mal)2]−/2− redox couple in an effort to develop appropriate redox couples beyond the commonly utilized redox couples in electrochemical deionization technology.
研究领域:
环境科学
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电化学
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jiancong Zhang,Xing Wang,Mengjun Liang,Minxian Han,Jinhong Dai,Qiang Wei,Than Zaw Oo,Su Htike Aung,Kwun Nam Hui,Fuming Chen
In this work, a solar-driven redox flow desalination system is reported, which combines a solar cell based on a Bi2O3 photoanode and a redox flow desalination cell through an integrated electrode. The Bi2O3 film was prepared through a simple one-step water bath deposition method and served as a photoanode after the coating of the N719 dye. The activated carbon (AC)-coated graphite paper served as both the integrated electrode and counter electrode. The I3–/I– redox electrolyte circulates in the solar cell channel between the photoanode and intergrated electrode, while the [Fe(CN)6]4–/[Fe(CN)6]3– electrolyte circulates in the redox flow desalination part between the integrated electrode and counter electrode. This dye-sensitized solar-driven desalination cell is capable of achieving a maximum salt removal rate of 62.89 μg/(cm2·min) without consuming any electrical power. The combination of the solar cell and redox flow desalination is highly efficient with double functions of desalination and energy release using light as a driving force. This current research work is significant for the development of efficient and stable photoanode materials in photoelectrochemical desalination.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2016
·
IF 4.412
Pengli Chen,Xiao Ma,Zhaoxiang Zhong,Feng Zhang,Weihong Xing,Yiqun Fan
Removing mixture salts from dye solutions using membrane technology still need to be improved for high dye rejection and low salt rejection. In this work, ceramic membrane with pore size of 1.5 nm presented a satisfactory desalination of dye solutions containing NaCl and Na 2 SO 4 compared with two commercial organic nanofiltration membrane elements (DK and DL). Effect of salt content, salt type, molar ratio of NaCl and Na 2 SO 4 , dye concentration and pH on performance of ceramic membrane for desalination of Eriochrome black T (EBT) were investigated. The results showed that dye rejection decreased by increasing salt content, dye concentration and solution pH. Compared with dye-NaCl solutions, a relative high flux and low rejection of dye were observed when treating dye-Na 2 SO 4 solutions. For the mixture salt-dye solutions, the flux, which was higher than that for the single salt-dye solutions, first increased then decreased with decreasing C NaCl /C Na2SO4 due to the change of structure of cake layer. Supper-molecule aggregates of EBT formed by hydrogen-bond is mainly responsible for the high rejection of EBT (> 99%) at acid conditions. The rejection of NaCl and Na 2 SO 4 was below 20% and 40%, respectively. These promising results demonstrates that the new ceramic membrane has a potential application in dye purification.
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
Processes
·
2023
·Vol. 11
·期 6
·1779
·
IF 3.5
Qiao Zhu,Zhe Li,Yafei Song,Yujun Tong,Tao Yang,Zhenmin Cheng
The reduced solubility of inorganic salts in supercritical water has a significant impact on the stable operation of desalination facilities as it may lead to surface fouling due to salt deposition. In this study, the solubility of Na2SO4was experimentally determined to be 0.04–15.34 mmol/kg water at 23–25 MPa and 390–420 °C. To investigate the precipitation behavior of Na2SO4in supercritical water, a reactor with a heating bar was designed and the deposition effect of salt on the superheated surface in an autoclave was tested at a temperature of 390 °C and a pressure of 23 MPa. Then, the deposition mechanism of salt in the autoclave was analyzed and the temperature field in the reactor was simulated using CFD commercial software. The experimental results showed that Na2SO4was present on both the heating rod and the bottom of the autoclave with a loose salt layer. The simulation results indicated that the temperature near the heating rod was significantly higher than the bulk fluid temperature and it provided the temperature condition where the inorganic salt preferentially nucleated and precipitated. Nickel foam was chosen as the porous media carrier to investigate the selective precipitation of salt on different superheated surfaces. The results showed that nickel foam could collect a large amount of salt on the heating rod and change the state of the compact salt layer on the kettle bottom wall, providing a technical choice for salt recovery under supercritical conditions.Keywords:supercritical water;desalination;temperature effect;surface fouling
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Huapu Zhao,Yaru Kong,Man Xu,Cunwen Wang,Yuan Liu,Yanbo Li
Pervaporation (PV) membranes for desalination show significant potential, attracting increasing attention. Herein, polyphenol (tannic acid) was used to crosslink chitosan to prepare composite membranes for pervaporation desalination. The effects of the coating method, the concentrations of chitosan (CS) and tannic acid (TA), the deposition time of CS and TA, and the thermal annealing time on the desalination performance of the pervaporation membranes were investigated to explore the relationship between membrane structure and pervaporation desalination performance. After optimizing the synthesis conditions, a high flux pervaporation desalination membrane (44 kg·m −2 ·h −1 at 50°C and 92 kg·m −2 ·h -1 at 70°C) with a NaCl rejection higher than 99.9 % was prepared by co-depositing chitosan and TA on a polysulfone support. This work demonstrates TA crosslinked CS composite membranes have promising research prospects and potential applications in pervaporation desalination.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 37
·期 5
·1101-1109
·
IF 1.307
Bian Xiangying,Zhang Yuping,Gong Li,Zhu Yuzhang,Jin Jian
I mproving the permeate flux but retaining the rejection of thin-film composite(TFC) polyamide nanofiltration(NF) membrane is a high requirement for desalination. In this work, a calcium ion(Ca 2+ ) coordinated polyamide(PA) NF membrane was prepared by directly adding CaCl 2 to the piperazine(PIP) aqueous solution during the interfacial polymerization process. Due to the coordination interaction between Ca 2+ and the amide bond in PA active layer, the number of hydrogen bonds in the PA active layer was reduced, causing in turn the decrease of physical cross-linking degree. As a consequence, the pore of the PA active layer was enlarged, prominently enhancing the water permeance of NF membrane. With the increase of CaCl 2 concentration, the pure water flux of TFC NF increased significantly while the rejection of Na 2 SO 4 decreased sightly. Compared with TFC NF membrane prepared without CaCl 2 , the permeate flux of the Ca 2+ coordinated polyamide NF membrane prepared under optimal conditions was increased by 3–4 folds with Na 2 SO 4 rejection of 95.26%. Meanwhile, such a Ca 2+ coordinated PA NF membrane showed a better SO 4 2− /Cl − selectivity.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2021
·
IF 9.147
Yalei Dai,Jingyun Zhao,Hongshan Liang,Qianchun Deng,Chuyun Wan,Bin Li,Bin Zhou
The reutilization of salted duck egg whites is still an important challenge facing the egg product industry. Efficient desalination of salted duck egg white is an effective way to make high-value use of the by-product in the food manufacturing. In this work, benefit from the thermoreversible properties of gelatin (GEL), salted duck egg white (SDEW) was blended with GEL to desalt after forming gels (4 °C). After the temperature was restored, the egg white was recovered to liquid after desalting , which still maintained the functional properties. Using this simple method, the desalination rate reached from 92.85% to 95.75% after 6 h soaking, and the protein loss rate was about 0.197–0.366%. Compared with the control group (only containing SDEW or GEL), salted egg white/gelatin mixed solution after desalination (DDG) had higher foaming capability and foaming stability at different concentrations of gelatin and salted egg whites. This indicated that egg whites still had good foaming properties after desalination. The following interfacial properties demonstrated DDG could adsorb to the air-water interface and formed a viscoelastic surface layer. Additionally, DDG (1 mg/mL) prepared from egg white and gelatin had a unique interfacial expansion rheological behavior. Herein, this study provides a new path for SDEW desalination through physical technology, which of course broadens the utilization of salted duck egg white.
研究领域:
食品科学
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生物化学
✓ 已验证
DOI
高影响因子
International Journal of Environmental Research and Public Health
·
2022
·Vol. 20
·期 1
·517
·
IF 4.614
Yuxin Jiang,Ken Li,Sikpaam Issaka Alhassan,Yiyun Cao,Haoyu Deng,Shan Tan,Haiying Wang,Chongjian Tang,Liyuan Chai
Capacitive deionization (CDI) is a newly developed desalination technology with low energy consumption and environmental friendliness. The surface area restricts the desalination capacities of traditional carbon-based CDI electrodes while battery materials emerge as CDI electrodes with high performances due to the larger electrochemical capacities, but suffer limited production of materials. LiMn2O4is a massively-produced lithium-ion battery material with a stable spinel structure and a high theoretical specific capacity of 148 mAh·g−1, revealing a promising candidate for CDI electrode. Herein, we employed spinel LiMn2O4as the cathode and activated carbon as the anode in the CDI cell with an anion exchange membrane to limit the movement of cations, thus, the lithium ions released from LiMn2O4would attract the chloride ions and trigger the desalination process of the other side of the membrane. An ultrahigh deionization capacity of 159.49 mg·g−1was obtained at 1.0 V with an initial salinity of 20 mM. The desalination capacity of the CDI cell at 1.0 V with 10 mM initial NaCl concentration was 91.04 mg·g−1, higher than that of the system with only carbon electrodes with and without the ion exchange membrane (39.88 mg·g−1and 7.84 mg·g−1, respectively). In addition, the desalination results and mechanisms were further verified with the simulation of COMSOL Multiphysics.Keywords:capacitive deionization;LiMn2O4;lithium ion;desalination capacity;simulation
研究领域:
环境工程
·
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 15
·10029-10034
·
IF 3.9
Gengen Peng,Haibo Li
Owing to its high electrochemical ability, the FeP is envisioned to be the potential electrode for capacitive deionization (CDI) with enhanced performance. However, it suffers from poor cycling stability due to the active redox reaction. In this work, a facile approach has been designed to prepare the mesoporous shuttle-like FeP using MIL-88 as the template. The porous shuttle-like structure not only alleviates the volume expansion of FeP during the desalination/salination process but also promotes ion diffusion dynamics by providing convenient ion diffusion channels. As a result, the FeP electrode has demonstrated a high desalting capacity of 79.09 mg g−1 at 1.2 V. Further, it proves the superior capacitance retention, which maintained 84% of the initial capacity after the cycling. Based on post-characterization, a possible electrosorption mechanism of FeP has been proposed.
研究领域:
材料科学
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电化学
·
环境工程
✓ 已验证
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Mingyang Du,Zhigang Sun,Zengnan Liu,Yue Yang,Ziyuan Liu,Yexuan Wang,Bin Jiang,Zhibiao Feng,Chunhong Liu
Salted duck egg white (SDEW) is difficult to convert into high-value products for the high salt content and unpleasant odor, which leads to the loss of high-quality protein resources. In this work, for the first time, the freeze-thaw treatment was used for protein desalination to achieve complete desalination of SDEW. After SDEW prepared into hydrogel by microwave-assisted hydrothermal (125 °C, 500 W) in only 12 min, repeated freeze-thaw treatments made the hydrogel porous at the molecular level from the inside, which accelerated the outward migration of salt, thereby increasing the desalination efficiency. After ultrasonic dispersion, completely desalted SDEW, as a food-grade Pickering emulsion stabilizer, can stabilize Pickering emulsion at a particle concentration of 0.5–3.0%, oil phase fraction of 0.20–0.80 and pH value of 3.0–11.0 for at least 28 days. Overall, the findings provide a novel, simple and efficient method for SDEW desalination, and confirm that desalted SDEW is a low-cost but efficient food-grade Pickering emulsion stabilizer, which extend the potential commercial applications for SDEW in food industry.
研究领域:
食品科学
·
蛋白质工程
✓ 已验证
DOI
高影响因子
ACS ES&T Water
·
2021
·
IF 0
Wenzhong Ma,Xinlei Dai,Pei Qiu,Hanwen Ye,Jing Zhong,Hideto Matsuyama
The performance of a cross-linked polyimide (PI) nanofiltration membrane was assessed by interfacial polymerization (IP) combined with the chemical imidization method. With the IP process with m-phenylenediamine and pyromellitic chloride monomers, trimesoyl chloride (TMC) for cross-linking, and the subsequent chemical imidization process, a PI thin film composite (TFC) nanofiltration (NF) membrane was prepared. The results showed that the PI TFC membrane had a high flux of ∼9.13 L m–2 h–1 bar–1 at 4 bar. The effects of the amount of cross-linking agent and reaction time on the NF membranes’ nanofiltration performance were systematically investigated. We selected a CaSO4 salt solution to evaluate the performance of the nanofiltration membrane because the PI TFC nanofiltration membrane’s molecular weight cutoff was in the range of 600–800 Da. The PI membrane rejection to CaSO4 aqueous solution under the optimal preparation conditions reached 93%. When the FCF/water, FCF/DMF, and FCF/ethanol solutions were filtered, the TMC cross-linked PI TFC membrane exhibited a <8% solvent permeation decline but FCF rejection remained at 98%. The PI TFC membrane maintained permeability and salt rejection during the 120 h filtration.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
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