DESALINATION
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2025
·
IF 9.8
Lingzi Liu,Junsheng Wu,Zelin Wang,Jianyun Liu,Xiaowei Sun,Hao Wang
A 3-channel cell structure for capacitive deionization (CDI) process has been proposed and tested in this study. A great improvement in electrosorption performance has been achieved with this novel cell design. Using a NaCl aqueous solution with a conductivity of 3000 μS/cm as the feed stream, a desalination rate of 85 % was obtained with a water recovery of 90 %. The 3-channel design enabled the electrosorption process proceeded in an almost continuous fashion, greatly enhancing the cell utilization efficiency and lowering capital costs in the practical desalination system. In addition, the introduction of an electrode chamber flow renders the electrosorption process suitable for higher-concentration feed solutions, effectively overcoming the concentration limitations typically faced by traditional CDI systems. In the practical application, the system was tested for the desalination of desulfurization wastewater from power plants, achieving over 90 % ion removal, with total hardness decreased by 96.1 % in a continuous test. This study highlights the potential of the 3-channel CDI design for large-scale applications, especially for high salinity wastewater treatment, providing new insights into advancing electrosorption technology for challenging water treatment scenarios.
研究领域:
环境科学
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水处理技术
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产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 20
·7152-7159
·
IF 6.1
Yun Han,Yunchen Du,Li Zhu,Yonglei Liu,Bo Hu,Bojing Sun,Fei Han
In solar desalination, resolving the durability and efficiency losses stemming from salt precipitation has become a long sought-after goal. We showcase the design for a facile, yet high efficiency solar distillation device that exhibits durable operation in hypersaline brine, where a bifunctional Janus structure is introduced for self-driven salt resistance and photothermal conversion. A Janus scaffold was constructed using an acrylate hydrogel and polyvinylidene difluoride (PVDF) for self-driven salt resistance; the polyelectrolyte effect of the gel prevents ion accumulation and the hydrophobic PVDF suppresses ion diffusion to the evaporative interface. Then, the hydrophobic part was functionalized with a new light absorber, a Ni/C nano-composite, to achieve effective photothermal conversion across the full solar spectrum. The evaporator is capable of 14 days of continuous working in hypersaline brine (10 wt% NaCl) at a rate of 1.56 kg m−2 h−1, which is among the best reported durabilities and approaches the theoretical limit. Hopefully, the new design will greatly expand the ability of solar desalination to work in extreme environments.
研究领域:
材料科学
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环境科学
·
能源工程
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Hong Wei,Dawei Pan,Yan Liang,Xia Fan,Guowei Gai
Considering the impact of the high salinity and high turbidity of coastal seawater on phosphorus forms, a new method was proposed to determine bioavailable inorganic phosphorus (BIP). The phosphorus most relevant to eutrophication is BIP, and traditional analysis methods may underestimate the degree of eutrophication. In this study, a microelectrode of multigold (AuμE) was fabricated for direct voltammetric determination of BIP without filtration, and BIP environmental characteristics including distribution and correlation relationships with environmental factors in typical coastal seawater of Northern China were analyzed. The proposed AuμE showed a low detection limit of 0.03 μM. The surface and bottom BIP concentrations ranged from 1.00 to 2.13 and from 0.88 to 2.05 μM, respectively. BIP dominated the total P (TP) accounting for 48.5–67.5 % in the surface layer samples, and 32.6–92.7 % in the bottom layer samples, respectively. The concentrations of BIP were obviously higher than those of DIP, indicating that DIP may underestimate the probability of eutrophication occurring. And BIP was positively correlated with dissolved oxygen (DO) ( P < 0.05). BIP may be a promising indicator of eutrophication potential in coastal areas with high salinity and high turbidity. The proposed reliable voltammetry method provides a new indicator for environmental assessment and represents a significant step in the comprehensive analysis of P species.
CAS / MDL:
研究领域:
海洋生物学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Jie Wang,Haibao Liu,Defang Ma,Yan Wang,Guangping Yao,Qinyan Yue,Baoyu Gao,Shue Wang,Xing Xu
In this work, the combined ultraviolet ozone process (UV/O 3 ) was applied for organic contaminant (Reactive Blue K-GL, RB) degradation in high salinity . The degradation rates of RB in both O 3 and UV/O 3 systems were enhanced by NaCl (the k increased from 0.080 to 0.116 to 0.132 and 0.267 min −1 respectively), while mineralization rate varied at different salt conditions. In addition, UV irradiation promoted the degradation efficiency of RB with the presence of salt. Singlet oxygen ( 1 O 2 ) was the primary active species in the UV/O 3 system. The quenching experiments and signal intensity of 1 O 2 corresponded well to the mineralization of RB. Under conditions of high salinity and high pH, O 3 has high mass transfer coefficient (k La , 3.303 min −1 ) and self-decomposition (k d , 0.600 min −1 ), which further promoted the formation of 1 O 2 for mineralization of RB. Furthermore, UV/O 3 system was efficient in real textile wastewater treatment (COD Cr removal rate 91.7% and decolorization rate 98.7%).
研究领域:
环境科学
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水处理
·
污染物降解
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Yuan-yuan Ren,Cheng Liu,Yu-ye Luo,Tariq Mehmood,Yu-lin Zheng
Magnetic ion exchange resin (MIEX) pretreatment has been widely used to enhance the performance of waterworks, but the high-salinity organic desorbent produced during the resin regeneration is difficult to be safely disposed of. The present study aimed to investigate the removal of DOM and retention of salts from MIEX desorbent via zero-valent iron (ZVI)-assisted Fenton reaction . ZVI/H 2 O 2 mediated Fenton reaction was further validated by various analytical approaches such as 3D-EEM, Molecular weight distribution, Zeta potential , size, dissolution of iron ions, etc. In batch experiments, 73.26% reduction of DOC and 97.66% of UV 254 were achieved in 40 min at optimal H 2 O 2 concentration (20 mM), 2 g/L dose of ZVI, and pH of 3, respectively. The removal of organics was ascribed to the direct oxidation of ZVI/H 2 O 2 and flocculation of the iron released during the oxidation . It should be noted that the high concentration of Cl - in system favored the organic removal and its enhanced performance lied in the production and oxidation of HOCl/OCl - . The treated liquid can be reused to regenerate the saturated resin with only a small amount of salt supplementation to obtain a similar recovery performance to that of a freshly configured 10% NaCl solution. Moreover, the retrieval and utilization of ZVI particles and other properties of MIEX desorbent after ZVI/H 2 O 2 treatment were all promising and up to the mark: after four reuses, the mineralization of organic matter differs by 8.81% from the first time, which could be compensated by supplying new ZVI. This research will facilitate the recycling of resin desorbate and expand the market for MIEX applications.
研究领域:
环境科学
·
水处理工程
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Shuai Yang,Jingquan Wang,Zhizhuo Chai,Hongguang Guo
Radical-based advanced oxidation process (AOPs) has attracted great interests in wastewater treatment field. However, by the traditional radical-based method, the degradation of organic pollution is greatly suppressed when radicals react with the co-existing anions in the solution. Herein, an efficient method for degrading of contaminant under high salinity conditions is discussed through a non-radical pathway. Carbon nanotubes (CNTs) was employed as an electron transfer medium to facilitate the electron conversion from contaminants to potassium permanganate (PM). Based the results of quenching experiments, probe experiments, and galvanic oxidation process experiments, the degradation mechanism of CNTs/PM process was demonstrated to be electron transfer, rather than reactive intermediate Mn species. As a result, typical influencing factors including salt concentration, cations, and humic acid have less of an impact on degradation during CNTs/PM processes. In addition, the CNTs/PM system exhibits superior reusability and universality of pollutants, which has the potential to be applied as a non-radical pathway for the purification of contaminant in the large-scale high salinity wastewater treatment.
研究领域:
环境科学
·
废水处理
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 5
·49768
·
IF 2.52
Yuanlu Xu,Yi Yang,Menghan Sun,Xinfei Fan,Chengwen Song,Ping Tao,Mihua Shao
In this study, the direct contact membrane distillation (DCMD) with a superhydrophobic membrane (SM-DCMD) herein was designed and applied to desalinate RO brine, showing excellent performance in desalinating high salinity. The superhydrophobic membrane with good resistance to pore wetting and fouling was prepared by coating silica nanospheres onto a porous glass fiber substrate and subsequent fluorination. It maintained a stable flux (31.27 LMH at feed temperate of 80°C) and outstanding salt rejection (~100%) even in the presence of natural organic matter (NOM, a typical organic foulant) and sodium dodecyl sulfate (SDS, a typical wetting agent with low surface tension). During handling practical reverse osmosis brine, such SM-DCMD system presented excellent performances in terms of a stable flux of 23.70 LMH and salt rejection efficiency of >99% over 24 h continuous operations. The relevant COD and color removal efficiency kept a constant value of 100%. These overall findings indicate that the SM-DCMD is a hopeful candidate for desalinating practical RO brine with high performance.
研究领域:
环境科学
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材料科学
·
化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Wei Xiang,Lin Li,Yunbo Dong,Zizhao Wang,Zifan Song,Mingwei Zhao,Caili Dai
The development of ultra-deep oil reservoirs has posed greater demands on the performance of profile control agents, which composed by hydrophilic polyacrylamide main chain, heterocyclic ring structure and rigid side groups fail to perform decently in temperature beyond 120 °C. In this study, a sulfonated polystyrene microsphere (SPS-2–3) featuring a “rigid hydrophobic core and soft hydrophilic shell” architecture was synthesized through concentrated sulfuric acid sulfonation. At elevated temperatures, the hydrophilic sulfonated layer of SPS-2–3 exhibits increased thickness, alongside enhanced charge quantity and charge mobility. These changes facilitate a more uniform distribution of surface charges on SPS-2–3 and extend the spatial range of electrostatic interactions. Consequently, the fraction of bound water increases significantly from 4.37 % (room temperature) to 26.93 %, electrostatic repulsion between the SPS-2–3 is increased to 4.82 nN, endowing SPS-2–3 with superior dispersion stability under temperature surpassing 160 °C and salinity up to 20 × 10 4 mg·L -1 . The crude oil mobilization characteristics demonstrate that SPS-2–3 effectively enhances the mobilization efficiency of remaining oil in the matrix and achieves a 3.5-fold increase in injection pressure and 20.11 % increase in oil recovery. This study provides a new idea for designing high-performance profile control agents for applications in deep reservoir development.
研究领域:
石油工程
·
材料科学
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产品关联
DOI
高影响因子
PETROLEUM SCIENCE AND TECHNOLOGY
·
2019
·
IF 1.07
Lin Li,Xuwei Liu,Huijing Wang,Chaocheng Zhao,Qiyou Liu,Xiufang Shang
Environmental adaptability and biodegradability of oil pollutants on functional bacteria are two important keys to bioremediation technologies. Pseudomonas sp. LKY-5 revealed strong biological activities in high salinity (3%) and high alkalinity (pH 9.0). N-hexadecane, phenanthrene, pyrene and carbazole could be directly utilized, and inhibited by the presence of DBT. Sulfur compounds and alkanes in No. 0 diesel and FCC diesel were effectively degraded. The concentrations of short chain alkanes were increased significantly after degradation. It can be seen that strain LKY-5 is an excellent bacterial candidate for bioremediation of oil-contaminated sites and sediments.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Xun Zhong,Jiating Chen,Fangzhou Xu,Xingyu Chen
High-efficiency development of low permeability reservoirs is significant to maintaining a balance between energy supply and social needs. Surfactant-based nanofluids with an excellent interfacial activity that can penetrate the small throats and narrow pores are considered promising EOR agents. However, the applications of nanofluids in harsh reservoir conditions remain to be challenging due to high stability requirements. In this work, a highly stable active nanofluid that could withstand high salinity (API brine) and elevated temperatures was prepared by mixing zwitterionic hydroxypropyl sulfobetaine surfactant with low-molecular-weight ligand modified silica nanoparticles. At a surfactant/nanoparticle concentration ratio of 0.5, the spontaneous imbibition recovery factor of dodecyl hydroxypropyl sulfobetaine-based nanofluid was 2.61 times higher than API brine, 1.29 times higher than API brine-based nanofluid and 0.37 times higher than surfactant alone. Meanwhile, the impacts of surfactant carbon chain length, permeability as well as hydrochloric acid were included. Experimental results indicated that surfactants with longer carbon chain length would destabilize the nanofluids due to increasing hydrophobic interactions, and nanoparticle aggregation/precipitation would impose adverse impacts on spontaneous imbibition because of pore/throat plugging. Though increasing permeability could partially ease the negative plugging effects, the potential risks should never be overlooked. Properly using hydrochloric acid could greatly enhance the stability of nanoparticles by forming an “H + ” protection layer and extend their applications to over 80 °C, but the presence of acid also disturbed the adsorption behaviors of surfactants, therefore, different phenomena were noticed when the nanofluid formula changed. A good spontaneous imbibition system should possess both IFT reduction and wettability alteration capabilities, and nanoparticles’ ability to adsorb and disperse polar compounds such as asphaltene should be fully fulfilled. This study provides new guidance for nanofluid formulation to support the effective development of low-permeability oil reservoirs.
研究领域:
石油工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Peng Ding,Ping Wu,Zhang Jie,Min-Hua Cui,He Liu
The anaerobic biodegradation of polycyclic aromatic hydrocarbons (PAHs) in high salinity wastewater is rather hard due to the inhibition of microorganisms by complex and high dosage of salts. Microbial electrolysis cell (MEC), with its excellent characteristic of anodic biofilms, can be an effective way to enhance the PAHs biodegradation. This work evaluated the impact of NaCl concentrations (0 g/L, 10 g/L, 30 g/L, and 60 g/L) on naphthalene biodegradation and analyzed the damage protection mechanism of anodic biofilms in batching MECs. Compared with the open circuit, the degradation efficiency of naphthalene under the closed circuit with 10 g/L NaCl concentration reached the maximum of 95.17% within 5 days. Even when NaCl concentration reached 60 g/L, the degradation efficiency only decreased by 10.02%, compared with the MEC without additional NaCl. Confocal scanning laser microscope (CSLM) proved the superiority of the biofilm states of MEC anode under high salinity in terms of thicker biofilms and higher proportion of live/dead bacteria cells. The highest dehydrogenase activity (DHA) was found in the MEC with 10 g/L NaCl concentration. Moreover, microbial diversity analysis demonstrated the classical electroactive microorganisms Geobacter and Pseudomonas were found on the anodic biofilms of MECs, which have both PAHs degradability and the electrochemical activity. Therefore, this study proved that high salinity had adverse effects on the anodic biofilms, but MEC alleviated the damage caused by high salinity.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 7
·1656
·
IF 5
Qing Yin,Fangong Kong,Shoujuan Wang,Jinbao Du,Ling Pan,Yubo Tao,Peng Li
Zero liquid discharge (ZLD) is a technique for treating high-salinity brine to obtain freshwater and/or salt using a solar interface evaporator. However, salt accumulation on the surface of the evaporator is a big challenge to maintaining stable water evaporation. In this study, a simple and easy-to-manufacture evaporator, also called a crystallizer, was designed and fabricated by 3D printing. The photothermal layer printed with polylactic acid/carbon composites had acceptable light absorption (93%) within the wavelength zone of 250 nm–2500 nm. The micron-sized voids formed during 3D printing provided abundant water transportation channels inside the crystallizer. After surface hydrophilic modification, the crystallizer had an ultra-hydrophilic channel structure and gravity-assisted salt recovery function. The results revealed that the angles between the photothermal layers affected the efficacy of solar evaporation and the yield of solid salt. The crystallizer with the angle of 90° between two photothermal layers could collect more solid salt than the three other designs with angles of 30°, 60°, and 120°, respectively. The crystallizer has high evaporation and salt crystallization efficiency in a high-salinity brine environment, which is expected to have application potentials in the zero liquid discharge of wastewater and valuable salt recovery.Keywords:high-salinity brine treatment;solar crystallizer;3D printing;salt collection;zero liquid discharge
研究领域:
环境工程
·
材料科学
·
水处理技术
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）