Desalination最新文献_第4页

Enhanced lithium extraction from high-sodium brines: Modification of a manganese-based ion sieve using hydroxylated graphene and graphene oxide

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2025-02-16 DOI: 10.1016/j.desal.2025.118694

Ang Mi , Xinbo Qin , Fei Zhang , Rongping Yun , Youjing Zhao , Min Wang , Xu Xiang

Salt-lake brines have emerged as a promising source of lithium; however, the separation of Li⁺ ions from other coexisting ions remains challenging. To surmount this issue, a three-dimensional wrinkled membrane that was based on a H_1.6Mn_1.6O₄ (HMO) ion sieve and comprised graphene oxide (GO) and hydroxylated graphene (GOH) was fabricated in this study. The designed structure provided abundant channels for ion migration. The hydroxyl groups of graphene allowed the membrane to exhibit improved Na⁺–Li⁺ sieving ability. The lithium adsorption capacity of HMO-GOH/GO (20.6 mg/g) was considerably higher than that of HMO (8.9 mg/g) in a low-concentration lithium solution. The adsorption capacity and separation coefficient of HMO-GOH/GO in a high-sodium brine of Na/Li = 49:1 (48.0 mg/g and 47.1) were higher than those of HMO (21.6 mg/g and 29.3, respectively). The adsorption capacity of HMO-GOH/GO remained at 90.8 % of its initial value after 10 adsorption–desorption cycles, thus demonstrating excellent cyclic stability. HMO/GO-GOH shows higher specific capacitance than HMO based on the cyclic voltammetry results. The density functional theory calculations on adsorption energy of Li⁺·4H₂O and the energy barrier across the GOH pore confirm the Na⁺/Li⁺ sieving capability. The adsorption mechanism was studied by in situ Raman spectroscopy, verifying the formation of LiO bond during lithium adsorption. Overall, this study provides guidance in the pursuit of a remedy for NaLi separation.

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引用次数: 0

Design, synthesis, and application of negative ion-ion sieve synergistic adsorbent based on cross-linked carrier

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2025-02-16 DOI: 10.1016/j.desal.2025.118705

Tianshu Bao , Chenye Wang , Huiquan Li , Liangbin Li , Zhenhua Sun , Yong Wang , Xinjuan Hou , Aiping Peng , Ming Ye

The growing demand for lithium in the new sustainable society is advancing technology for lithium recycling from real Salt Lake brine, which has low concentrations in a near-neutral condition. Traditional adsorbents for this process typically exhibit excellent adsorption ability in alkaline solutions, limiting their industrial application for recycling lithium from the real salt lake. In this work, we designed and synthesized a manganese-based ion sieve loaded onto a cross-linked polystyrene carrier and modified it, HMO@PS-IDA, by incorporating iminodiacetate onto a polystyrene-based ion sieve. These conditions typically reduce the charge density on the surface of adsorbents, hindering the ion exchange process. Our innovative approach introduces cross-linked polystyrene for adsorbent granulation, providing modification sites, and selects Iminodiacetic acid (IDA) as the preferred anionic donor. The dual-structure design of anionic groups and ion sieves in HMO@PS-IDA results in a remarkable 2.6-fold increase in adsorption capacity at pH = 7, surpassing the individual capacities of its components. The adsorbent exhibits a regular spherical shape with a rough surface and uniformly distributed ion sieves, achieving an adsorption capacity of 6.85 mg·g⁻¹ within 40 min in a real neutral system. The synergistic adsorption mechanism is attributed to the CHELPG atomic charge decrease from −0.16 to −1.44, maintaining the ion exchange driving force under neutral conditions. This innovation compensates for the loss of surface charge on the adsorbent, enabling a wide pH application range and overcoming the low adsorption capacity issue in near-neutral conditions. HMO@PS-IDA also demonstrates exceptional lithium adsorption capacity, with a 10-cycle adsorption capacity of 6.3 mg·g⁻¹, maintaining 92.1 % of the initial performance. These properties make HMO@PS-IDA a direct candidate for extracting Li⁺ from neutral salt lake brines, and our findings provide a theoretical foundation for the modification of adsorption materials.

{"title":"Design, synthesis, and application of negative ion-ion sieve synergistic adsorbent based on cross-linked carrier","authors":"Tianshu Bao , Chenye Wang , Huiquan Li , Liangbin Li , Zhenhua Sun , Yong Wang , Xinjuan Hou , Aiping Peng , Ming Ye","doi":"10.1016/j.desal.2025.118705","DOIUrl":"10.1016/j.desal.2025.118705","url":null,"abstract":"<div><div>The growing demand for lithium in the new sustainable society is advancing technology for lithium recycling from real Salt Lake brine, which has low concentrations in a near-neutral condition. Traditional adsorbents for this process typically exhibit excellent adsorption ability in alkaline solutions, limiting their industrial application for recycling lithium from the real salt lake. In this work, we designed and synthesized a manganese-based ion sieve loaded onto a cross-linked polystyrene carrier and modified it, HMO@PS-IDA, by incorporating iminodiacetate onto a polystyrene-based ion sieve. These conditions typically reduce the charge density on the surface of adsorbents, hindering the ion exchange process. Our innovative approach introduces cross-linked polystyrene for adsorbent granulation, providing modification sites, and selects Iminodiacetic acid (IDA) as the preferred anionic donor. The dual-structure design of anionic groups and ion sieves in HMO@PS-IDA results in a remarkable 2.6-fold increase in adsorption capacity at pH = 7, surpassing the individual capacities of its components. The adsorbent exhibits a regular spherical shape with a rough surface and uniformly distributed ion sieves, achieving an adsorption capacity of 6.85 mg·g<sup>−1</sup> within 40 min in a real neutral system. The synergistic adsorption mechanism is attributed to the CHELPG atomic charge decrease from −0.16 to −1.44, maintaining the ion exchange driving force under neutral conditions. This innovation compensates for the loss of surface charge on the adsorbent, enabling a wide pH application range and overcoming the low adsorption capacity issue in near-neutral conditions. HMO@PS-IDA also demonstrates exceptional lithium adsorption capacity, with a 10-cycle adsorption capacity of 6.3 mg·g<sup>−1</sup>, maintaining 92.1 % of the initial performance. These properties make HMO@PS-IDA a direct candidate for extracting Li<sup>+</sup> from neutral salt lake brines, and our findings provide a theoretical foundation for the modification of adsorption materials.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"604 ","pages":"Article 118705"},"PeriodicalIF":8.3,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phenomenon of white superevaporation of water and its application for enhancing energy efficiency in dark/solar water purification, power generation, and generative AI

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2025-02-16 DOI: 10.1016/j.desal.2025.118695

Ranran Fang , Yi Li , Jiangen Zheng , Zhonghua Yan , Nana Pan , Xiang Chen , Xi Zhao , Quan Chen , Yongyi Deng , Zeyu Sun , Lan Yang , Anatoliy Y. Vorobyev

Water evaporation is a fundamental physical process underlying the vital technologies of power generation and drinking water production. Enhancing the evaporation rate can provide substantial fuel/water savings in electricity generation, energy savings in clean water production, and energy/water savings in generative AI systems, thereby contributing to a global reduction in greenhouse gas emissions. Here we discover the phenomenon of white superevaporation from the superhydrophilic nano/micro-textured surface of black silicon carbide ceramic. At a maximum, the white superevaporation rate at zero sun achieves record values of 27.3 and 164 kg m⁻² h⁻¹ at air temperatures of 23 and 60 °C, respectively. During this extremely intensive evaporation, a commonly dark wet surface becomes white. Based on the white superevaporation discovery, we develop the advanced interfacial evaporator material, the evaporative functionality of which outperforms that of the existing materials in the fields of dark/solar water purification/desalination and dew point (M-cycle) evaporative cooling technologies for enhancing the fuel/water efficiency in power generation and for augmenting energy/water savings in generative AI. Our study provides a new approach to developing novel, efficient materials for a broad range of evaporation-based technologies related to the energy-water-environment nexus.

{"title":"Phenomenon of white superevaporation of water and its application for enhancing energy efficiency in dark/solar water purification, power generation, and generative AI","authors":"Ranran Fang , Yi Li , Jiangen Zheng , Zhonghua Yan , Nana Pan , Xiang Chen , Xi Zhao , Quan Chen , Yongyi Deng , Zeyu Sun , Lan Yang , Anatoliy Y. Vorobyev","doi":"10.1016/j.desal.2025.118695","DOIUrl":"10.1016/j.desal.2025.118695","url":null,"abstract":"<div><div>Water evaporation is a fundamental physical process underlying the vital technologies of power generation and drinking water production. Enhancing the evaporation rate can provide substantial fuel/water savings in electricity generation, energy savings in clean water production, and energy/water savings in generative AI systems, thereby contributing to a global reduction in greenhouse gas emissions. Here we discover the phenomenon of white superevaporation from the superhydrophilic nano/micro-textured surface of black silicon carbide ceramic. At a maximum, the white superevaporation rate at zero sun achieves record values of 27.3 and 164 kg m<sup>−2</sup> h<sup>−1</sup> at air temperatures of 23 and 60 °C, respectively. During this extremely intensive evaporation, a commonly dark wet surface becomes white. Based on the white superevaporation discovery, we develop the advanced interfacial evaporator material, the evaporative functionality of which outperforms that of the existing materials in the fields of dark/solar water purification/desalination and dew point (M-cycle) evaporative cooling technologies for enhancing the fuel/water efficiency in power generation and for augmenting energy/water savings in generative AI. Our study provides a new approach to developing novel, efficient materials for a broad range of evaporation-based technologies related to the energy-water-environment nexus.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"604 ","pages":"Article 118695"},"PeriodicalIF":8.3,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143436717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Same area, better output: 3D rose-shaped multi-reflective hydrogel evaporator for salt-resistant seawater desalination and contaminant degradation

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2025-02-15 DOI: 10.1016/j.desal.2025.118703

Bibek Chaw pattnayak , Sasmita Mohapatra

High light-to-heat conversion efficiency and outstanding water purification performance are two essential parameters for sunlight-driven solar evaporation in real applications. With various limitations of the used photothermal materials, the traditional three dimensional (3D) evaporators could not achieve the high solar-vapour conversion efficiency and rapid salt mitigation ability simultaneously. Herein, a rose-shaped 3D hydrogel evaporator (RSE) has been designed by using g-C₃N₄ nanotube as a photothermal material integrated with polyvinyl alcohol (PVA)/chitosan hydrogel matrix. The RSE evaporator exhibits a broad light absorption capacity of 99 % and vertically aligned porous network for the effective heat confinement which prevents the thermal loss to the bottom water while permitting the steam to evaporate. The RSE evaporator can form a porous channel for faster water transport and allows the rapid dissolution of deposited salt to the bottom water, and prevents salt accumulation. Such a deliberately designed 3D evaporator exhibits excellent hydrophilicity (~ 0°), high solar-vapour conversion efficiency of 98 %, and a stable steam generation rate of 3 kg.m⁻².h⁻¹ under the solar irradiation of one sun. The addition of g-C₃N₄ nanotube as photothermal material also acts as a photocatalyst and restricts the contamination of organic contaminants by photocatalytic degradation to assure the purification ability of the evaporated distillate. Such an advantageously designed 3D RSE evaporator provides a promising method for the generation of fresh water from seawater and wastewater.

{"title":"Same area, better output: 3D rose-shaped multi-reflective hydrogel evaporator for salt-resistant seawater desalination and contaminant degradation","authors":"Bibek Chaw pattnayak , Sasmita Mohapatra","doi":"10.1016/j.desal.2025.118703","DOIUrl":"10.1016/j.desal.2025.118703","url":null,"abstract":"<div><div>High light-to-heat conversion efficiency and outstanding water purification performance are two essential parameters for sunlight-driven solar evaporation in real applications. With various limitations of the used photothermal materials, the traditional three dimensional (3D) evaporators could not achieve the high solar-vapour conversion efficiency and rapid salt mitigation ability simultaneously. Herein, a rose-shaped 3D hydrogel evaporator (RSE) has been designed by using g-C<sub>3</sub>N<sub>4</sub> nanotube as a photothermal material integrated with polyvinyl alcohol (PVA)/chitosan hydrogel matrix. The RSE evaporator exhibits a broad light absorption capacity of 99 % and vertically aligned porous network for the effective heat confinement which prevents the thermal loss to the bottom water while permitting the steam to evaporate. The RSE evaporator can form a porous channel for faster water transport and allows the rapid dissolution of deposited salt to the bottom water, and prevents salt accumulation. Such a deliberately designed 3D evaporator exhibits excellent hydrophilicity (~ 0°), high solar-vapour conversion efficiency of 98 %, and a stable steam generation rate of 3 kg.m<sup>−2</sup>.h<sup>−1</sup> under the solar irradiation of one sun. The addition of g-C<sub>3</sub>N<sub>4</sub> nanotube as photothermal material also acts as a photocatalyst and restricts the contamination of organic contaminants by photocatalytic degradation to assure the purification ability of the evaporated distillate. Such an advantageously designed 3D RSE evaporator provides a promising method for the generation of fresh water from seawater and wastewater.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"604 ","pages":"Article 118703"},"PeriodicalIF":8.3,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143427896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tannin-derived vacancy-deficient nitrogen-doped porous carbon for highly selective adsorption of Cu2+ in capacitive deionization

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2025-02-15 DOI: 10.1016/j.desal.2025.118700

Wei Zhang , Shi Wang , Rongchao Wang , Linting Zhao , Wucheng Ma , Hao Zhang , Yunlong Liu , Zhenyu Shi , Can Jin , Liang Zhu

The application of capacitive deionization (CDI) for the selective removal of Cu²⁺ offers a promising avenue for the efficacious treatment of copper-laden wastewater, thereby mitigating significant environmental pollution concerns. Using tannin as a base material and Cu²⁺ as the target ion, we constructed a two-dimensional planar material with selective Cu²⁺ ion imprinting sites. Through a simple acid treatment, we successfully prepared vacancy-deficient nitrogen-doped porous carbon (TDNC-VD). Additionally, the biocarbon materials exhibited a high adsorption capacity with discernible selectivity towards Cu²⁺ in both single-component and mixed-solution systems. Notably, TDNC-VD has high selectivity coefficients (S_c) of 6.32, 11.38, and 18.20 compared to Zn²⁺, Mn²⁺, and Co²⁺ in mixed solutions. Finally, employing density functional theory (DFT) calculations, the TDNC-VD exhibited pronounced selectivity towards Cu, as evidenced by an adsorption energy of −9.25 eV for Cu, surpassing that of Zn (−8.70 eV), Mn (−8.43 eV), and Co (−8.31 eV). The selective adsorption of Cu by TDNC-VD primarily stemmed from the dimensions of the two-dimensional cavity structure established within the CuN coordination environment. The vacancy defects within the material exhibited greater compatibility with the structural dimensions of copper ions, facilitating the formation of stable bonds with the cavities. Conversely, the selective adsorption of copper ions onto the material was attributed to the incapacity of other ions to firmly bind to the adsorption sites. This study is anticipated to offer an environmentally friendly solution for the treatment of copper-containing wastewater.

{"title":"Tannin-derived vacancy-deficient nitrogen-doped porous carbon for highly selective adsorption of Cu2+ in capacitive deionization","authors":"Wei Zhang , Shi Wang , Rongchao Wang , Linting Zhao , Wucheng Ma , Hao Zhang , Yunlong Liu , Zhenyu Shi , Can Jin , Liang Zhu","doi":"10.1016/j.desal.2025.118700","DOIUrl":"10.1016/j.desal.2025.118700","url":null,"abstract":"<div><div>The application of capacitive deionization (CDI) for the selective removal of Cu<sup>2+</sup> offers a promising avenue for the efficacious treatment of copper-laden wastewater, thereby mitigating significant environmental pollution concerns. Using tannin as a base material and Cu<sup>2+</sup> as the target ion, we constructed a two-dimensional planar material with selective Cu<sup>2+</sup> ion imprinting sites. Through a simple acid treatment, we successfully prepared vacancy-deficient nitrogen-doped porous carbon (TDNC-VD). Additionally, the biocarbon materials exhibited a high adsorption capacity with discernible selectivity towards Cu<sup>2+</sup> in both single-component and mixed-solution systems. Notably, TDNC-VD has high selectivity coefficients (<em>S</em><sub><em>c</em></sub>) of 6.32, 11.38, and 18.20 compared to Zn<sup>2+</sup>, Mn<sup>2+</sup>, and Co<sup>2+</sup> in mixed solutions. Finally, employing density functional theory (DFT) calculations, the TDNC-VD exhibited pronounced selectivity towards Cu, as evidenced by an adsorption energy of −9.25 eV for Cu, surpassing that of Zn (−8.70 eV), Mn (−8.43 eV), and Co (−8.31 eV). The selective adsorption of Cu by TDNC-VD primarily stemmed from the dimensions of the two-dimensional cavity structure established within the Cu<img>N coordination environment. The vacancy defects within the material exhibited greater compatibility with the structural dimensions of copper ions, facilitating the formation of stable bonds with the cavities. Conversely, the selective adsorption of copper ions onto the material was attributed to the incapacity of other ions to firmly bind to the adsorption sites. This study is anticipated to offer an environmentally friendly solution for the treatment of copper-containing wastewater.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"604 ","pages":"Article 118700"},"PeriodicalIF":8.3,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143428013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Construction of super resilience graphene composite aerogels with efficient oil-water separation and formaldehyde removal, and its application for high performance urea-formaldehyde foam

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2025-02-15 DOI: 10.1016/j.desal.2025.118702

Buyong Wu , Chiyu Xu , Wenjie Chu , Yingguo Zhou

Graphene aerogel (GA) holds great potentials for treating oil-water mixtures and formaldehyde removal, while the fragile mechanical performances restrict its further development. Herein, epoxy terminated poly-(dimethylsiloxane) (PDMS) and polyurethane (PU) were grafted onto the amine-functionalized carbon nanotube (CNT) surface (CNT-PDMS-PU) sequentially, and multifunctional CNT-PDMS-PU@GA (CPPGA) was prepared through hydrothermal self-assembly and freeze-drying. Due to the tailored strong interfacial bonding, CNT-PDMS-PU acted as threads to stitch GO sheets together, and CNT-PDMS-PU was intercalated into GO layers to avoid serious restacking, constructing interconnected porous network with large specific surface area for CPPGA. Thus, enhanced compressive strength (256.13 kPa) and recoverability (90 % compressive strain), efficient oil-water separation, and excellent formaldehyde adsorption capacity (523.32 mg/g) based on chemical-physical adsorption effect were achieved for CPPGA. Besides, CPPGA powder was introduced to urea-formaldehyde (UF) prepolymer resin to prepare UF/CPPGA composite foam, which exhibited very low free formaldehyde emission and durable hydrophobicity with low water absorption ratio, showing promising application prospect in the field of building insulation. Such mechanically robust multifunctional composite graphene aerogel further burgeoned research interest for practical application.

{"title":"Construction of super resilience graphene composite aerogels with efficient oil-water separation and formaldehyde removal, and its application for high performance urea-formaldehyde foam","authors":"Buyong Wu , Chiyu Xu , Wenjie Chu , Yingguo Zhou","doi":"10.1016/j.desal.2025.118702","DOIUrl":"10.1016/j.desal.2025.118702","url":null,"abstract":"<div><div>Graphene aerogel (GA) holds great potentials for treating oil-water mixtures and formaldehyde removal, while the fragile mechanical performances restrict its further development. Herein, epoxy terminated poly-(dimethylsiloxane) (PDMS) and polyurethane (PU) were grafted onto the amine-functionalized carbon nanotube (CNT) surface (CNT-PDMS-PU) sequentially, and multifunctional CNT-PDMS-PU@GA (CPPGA) was prepared through hydrothermal self-assembly and freeze-drying. Due to the tailored strong interfacial bonding, CNT-PDMS-PU acted as threads to stitch GO sheets together, and CNT-PDMS-PU was intercalated into GO layers to avoid serious restacking, constructing interconnected porous network with large specific surface area for CPPGA. Thus, enhanced compressive strength (256.13 kPa) and recoverability (90 % compressive strain), efficient oil-water separation, and excellent formaldehyde adsorption capacity (523.32 mg/g) based on chemical-physical adsorption effect were achieved for CPPGA. Besides, CPPGA powder was introduced to urea-formaldehyde (UF) prepolymer resin to prepare UF/CPPGA composite foam, which exhibited very low free formaldehyde emission and durable hydrophobicity with low water absorption ratio, showing promising application prospect in the field of building insulation. Such mechanically robust multifunctional composite graphene aerogel further burgeoned research interest for practical application.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"604 ","pages":"Article 118702"},"PeriodicalIF":8.3,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143421981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing permeability of polyamide nanofiltration membranes via aqueous organophosphorus co-reactant assisted interfacial polymerization

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2025-02-14 DOI: 10.1016/j.desal.2025.118685

Tunga Kuhana Arsene , Zihao Zhai , Junyong Zhu , Miaomiao Tian , Yatao Zhang

Nanofiltration membranes' performance hinges on their ion sieving and water permeability, which are affected by the crosslinking degree, uniformity, thickness, and microstructure of the active layer. Additive control offers a promising approach for optimizing membrane properties. This study presents a novel approach to improve water permeance of nanofiltration membranes by introducing organophosphorus end-capping reagents ((2-aminoethyl) triphenyphosphonium bromide (ATPB), (3-aminopropyl) triphenylphosphonium bromide (ATPPB), and 2-(diphenyphosphino) ethylamine (DPPE)) as co-reactive additives in the aqueous phase during interfacial polymerization. These reagents influenced the amine monomer's diffusion behavior, leading to a more homogeneous and potentially thinner polyamide (PA) layer, as demonstrated by molecular dynamics (MD) simulations. By regulating this process, we effectively modified pore characteristics, charge density distribution, and structural properties of the PA layer, all through a straightforward one-step method. The ATPB-0.015 membrane emerged as the optimal choice due to its excellent performance, characterized by a nodular buried structure, a water permeance of 16.3 L m⁻² h⁻¹ bar⁻¹, and a high Na₂SO₄ rejection (98.5 %). In addition, the amide and phosphorus units on the ATPB-0.015 membrane surface facilitated the removal of 97.48 % of Escherichia coli through hydrogen bonding and electrostatic interaction, enhancing its anti-bacterial property. Anti-fouling tests employing bovine serum albumin (BSA) and humic acid (HA) as foulants revealed that the ATPB-0.015 membrane demonstrated a faster recovery ratio than the control membrane, primarily attributed to its enhanced surface hydrophilicity. This study demonstrates a facile method for designing nanofiltration membranes with controlled structure and functional performance characteristics.

{"title":"Enhancing permeability of polyamide nanofiltration membranes via aqueous organophosphorus co-reactant assisted interfacial polymerization","authors":"Tunga Kuhana Arsene , Zihao Zhai , Junyong Zhu , Miaomiao Tian , Yatao Zhang","doi":"10.1016/j.desal.2025.118685","DOIUrl":"10.1016/j.desal.2025.118685","url":null,"abstract":"<div><div>Nanofiltration membranes' performance hinges on their ion sieving and water permeability, which are affected by the crosslinking degree, uniformity, thickness, and microstructure of the active layer. Additive control offers a promising approach for optimizing membrane properties. This study presents a novel approach to improve water permeance of nanofiltration membranes by introducing organophosphorus end-capping reagents ((2-aminoethyl) triphenyphosphonium bromide (ATPB), (3-aminopropyl) triphenylphosphonium bromide (ATPPB), and 2-(diphenyphosphino) ethylamine (DPPE)) as <em>co</em>-reactive additives in the aqueous phase during interfacial polymerization. These reagents influenced the amine monomer's diffusion behavior, leading to a more homogeneous and potentially thinner polyamide (PA) layer, as demonstrated by molecular dynamics (MD) simulations. By regulating this process, we effectively modified pore characteristics, charge density distribution, and structural properties of the PA layer, all through a straightforward one-step method. The ATPB-0.015 membrane emerged as the optimal choice due to its excellent performance, characterized by a nodular buried structure, a water permeance of 16.3 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup>, and a high Na<sub>2</sub>SO<sub>4</sub> rejection (98.5 %). In addition, the amide and phosphorus units on the ATPB-0.015 membrane surface facilitated the removal of 97.48 % of <em>Escherichia coli</em> through hydrogen bonding and electrostatic interaction, enhancing its anti-bacterial property. Anti-fouling tests employing bovine serum albumin (BSA) and humic acid (HA) as foulants revealed that the ATPB-0.015 membrane demonstrated a faster recovery ratio than the control membrane, primarily attributed to its enhanced surface hydrophilicity. This study demonstrates a facile method for designing nanofiltration membranes with controlled structure and functional performance characteristics.</div></div>","PeriodicalId":299,"journal":{"name":"Desalination","volume":"603 ","pages":"Article 118685"},"PeriodicalIF":8.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solar-driven membrane distillation and forward osmosis coupled system enables simultaneous water regeneration and metal recovery from wastewater

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2025-02-13 DOI: 10.1016/j.desal.2025.118698

Tongyao Wu , Shiqiang Liang , Qindong Wang , Xinyue He , Chi Wang , Zhi Geng , Zhongmin Su

With the in-depth implementation of green and low-carbon development principles, substantial progress has been achieved in water recycling and resource recovery technologies. However, the high energy consumption of current high salinity metal-laden wastewater treatment technologies continues to conflict with sustainable development goals, highlighting the need for innovative processes that leverage clean energy for wastewater regeneration and resource recovery. Here, we present a novel solar-driven membrane distillation and forward osmosis coupled system (SDOS), that integrates photothermal and photoelectric properties of solar to achieve both pure water regeneration and metal recovery from metal-laden wastewater, alongside electricity generation. SDOS consists of three core chambers: a feed solution chamber containing metal-laden wastewater, a draw solution chamber with Na₂-EDTA solution, and a permeate solution chamber filled with low-temperature deionized water. The titanium dioxide/graphitic carbon nitride (TiO₂/g-C₃N₄) photoanode is positioned within the draw solution chamber, while the carbon fiber cathode resides in the feed solution chamber. A forward osmosis (FO) membrane separates the feed and draw solution chambers, and a carbon nanotube-polyvinylidene fluoride (CNT-PVDF) membrane divides the draw and permeate solution chambers, establishing a fully integrated SDOS. Under solar irradiation, SDOS demonstrated a pure water regeneration rate of 0.81 L m⁻² h⁻¹ and a copper recovery rate of 5.9 mg h⁻¹ cm⁻², achieving a peak power output density of 820 mW m⁻². This study introduces the SDOS, a novel approach for the efficient and stable extraction of pure water from metal-laden wastewater using solar energy. The system achieves a salt rejection rate exceeding 99 % while concurrently enabling metal resources recovery and electricity generation. By integrating resource utilization with energy recovery, the SDOS provides a transformative solution for sustainable wastewater treatment.

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引用次数: 0

Galvanostatic dynamic response of ion-exchange membrane systems emphasizing energy consumption in electrodialysis for desalination under chronopotentiometry and pulsed electric field

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2025-02-13 DOI: 10.1016/j.desal.2025.118691

A.A. Moya

The galvanostatic dynamic response of ion-exchange membrane (IEM) systems, has been studied. It emphasizes a key topic in desalination: energy consumption in electrodialysis under chronopotentiometry and pulsed electric field (PEF). From the Warburg-type impedance function, the chronoamperometric dynamic response is obtained on the basis of its expansion into partial fractions. The limit time at which the Cottrell-type transient response, which corresponds to a semi-infinite diffusion process, reaches the steady-state voltage of the system is π/4 the diffusion time, and it is interpreted in the chronopotentiogram. Energy consumption is analytically evaluated during the application time of a current step. Concepts such as effective inductance, accumulated charge, effective capacitance, effective charge time, or average open-circuit voltage, are novelty introduced in order to interpret the saved energy in PEF electrodialysis with respect to that consumed under direct current performance. Analytical expressions based on the Laplace transformation method are also derived for the time evolution of the voltage and energy waves obtained in response to a square wave current. Finally, energy consumption in electrodialysis for desalination under chronopotentiometry and PEF mode is novelty related to reactive power and average stored energy in the dynamic response of IEM systems to external sinusoidal currents.

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引用次数: 0

Selective removal of mercury ions from aqueous solution by thiourea-functionalized porous aromatic framework

IF 8.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Desalination

Pub Date : 2025-02-13 DOI: 10.1016/j.desal.2025.118696

Zi-Xuan Jin , He-Jie Lu , Xiang-Wen Chen , Yi-Hang Li , Si-Chao Zhu , Xiu-Lei Li , Zhi-Qian Jia , Yuexin Guo , Yu Yang , Li-An Hou

Mercury (Hg) is a significant biologically toxic water pollutant. Porous aromatic frameworks (PAFs) possess high surface area, open structure, and high stability under harsh conditions. In this paper, PAF-11 was modified with oxime and thiourea groups, and the as-obtained oximide functionalized PAF-11 (PAF-11-C=NOH) and thiourea functionalized PAF-11 (PAF-11-TU) were employed for adsorption of Hg²⁺ in solution for the first time. It was found that the adsorption capacity of PAF-11-TU was twice that of PAF-11-C=NOH, and exhibited a equilibrium capacity of 428 mg g⁻¹ for Hg²⁺. The adsorption of PAF-11-TU could be well fitted with the Langmuir and pseudo-second-order kinetics models, and displayed high anti-interference to co-existing metals, with a partial coefficient of 33,800 mL g⁻¹ for Hg²⁺, separation coefficients of 7935 and 3701 for Hg²⁺/Zn²⁺ and Hg²⁺/Cu²⁺ respectively. PAF-11-TU also showed good chemical stability and maintained removal rate of 91.62 % even after ten acid wash cycles. The excellent stability and preferential coordination of PAF-11-TU with Hg²⁺ indicate that PAF-11-TU is a suitable adsorbent for the removal of Hg²⁺ from water.

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引用次数: 0