WATER RESEARCH
·
2024
·
IF 11.4
Hongzhi Liu,Zi Wang,Hesong Wang,Zihan Liu,Jiaxuan Yang,Han Zhang,Heng Liang,Langming Bai
To address the issues of scaling caused by heat and water evaporation in regard to circulating cooling water (CCW), TFC membrane filtration systems have been increasingly considered for terminal treatment processes because of their excellent separation performance. However, membrane biofouling phenomenon significantly hinders the widespread utilization of TFC membranes. In this study, to harness the thermal phenomenon of CCW and establish a stable and durable multifunctional antibiofouling layer, temperature-responsive Pnipam and the spectral antibacterial agent Ag were organically incorporated into commercially available TFC membranes. Biological experimental findings demonstrated that above the lower critical solution temperature (LCST), the contraction of Pnipam molecular chains facilitated the inactivation of bacteria by the antibacterial agent, resulting in an impressive sterilization efficiency of up to 99 %. XDLVO analysis revealed that below the LCST, the establishment of a hydration layer on the functional interface resulted in the creation of elevated energy barriers, effectively impeding bacterial adhesion to the membrane surface. Consequently, a high bacterial release rate of 98.4 % was achieved on the low-temperature surface. The alterations in the functional membrane surface conformation induced by temperature variations further amplified the separation between the pollutants and the membrane, creating an enhanced "elastic interface." This efficient and straightforward cleaning procedure mitigated the formation of irreversible fouling without compromising the integrity of the membrane surface. This study presents a deliberately engineered thermoresponsive antibiofouling membrane interface to address the issue of membrane fouling in membrane-based CCW treatment systems while shedding new light on the mechanisms of "inactivation" and "defense."
研究领域:
环境科学
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材料科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 30
·17816-17828
·
IF 3.119
Wenchang Wei,Zheng Liu,Chuxin Liang,Guo-Cheng Han,Jiaxing Han,Shufen Zhang
In this work, two new bis-Schiff bases, namely 2-bromoisophthalaldehyde-2-aminofluorene (M1) and glutaraldehyde 2-aminofluorene (M2), were synthesized, and their structures were characterized and confirmed by infrared spectroscopy, Fourier transform mass spectrometry and UV-visible spectroscopy. Their corrosion inhibition performance on carbon steel in simulated circulating cooling water was investigated by weight loss measurements and electrochemical measurements. The potentiodynamic polarization curves confirmed that two bis-Schiff bases are anode-type inhibitors; electrochemical impedance spectroscopy tests showed that M1 and M2 possess the best inhibition efficiencies of 96.25% and 99.15% at the optimal concentration of 2.50 mmol L−1, respectively. The weight loss results showed that M1 and M2 exhibit maximum ηw values of 92.62% and 96.31%, respectively. Scanning electron microscopy showed that the inhibitors inhibited carbon steel corrosion. The adsorption isotherm measurements indicated that the two inhibitors exhibited physicochemisorption mechanisms and followed Langmuir adsorption isotherms. The relationships between the molecular structure and inhibition behavior of the inhibitors were explored by density functional theory, frontier molecular orbital studies, and Fukui index analysis, which affirmed that M2 possesses higher corrosion inhibition efficiency than M1.
研究领域:
材料科学
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电化学
·
理论化学
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产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Yi Luo,Riji Qiu,Xingran Zhang,Fang Li
Reverse osmosis (RO) system has been increasingly applied for circulating cooling water (CCW) reclamation. Plasticizers, which may be dissolved into CCW system in plastic manufacturing industry, cannot be completely removed by the pretreatment prior to RO system, possibly leading to severe membrane biofouling. Deciphering the characteristics and mechanisms of RO membrane biofouling in the presence of trace plasticizers are of paramount importance to the development of effective fouling control strategies. Herein, we demonstrate that exposure to a low concentration (1 − 10 μg/L) of three typical plasticizers (Dibutyl phthalate (DBP), Tributyl phosphate (TBP) and 2,2,4-Trimethylpentane-1,3-diol (TMPD)) detected in pretreated real CCW promoted Escherichia coli biofilm formation. DBP, TBP and TMPD showed the highest stimulation at 5 or 10 μg/L with biomass increasing by 55.7 ± 8.2 %, 35.9 ± 9.5 % and 32.2 ± 14.7 % respectively, relative to the unexposed control. Accordingly, the bacteria upon exposure to trace plasticizers showed enhanced adenosine triphosphate (ATP) activity, stimulated extracellular polymeric substances (EPS) excretion and suppressed intracellular reactive oxygen species (ROS) induction, causing by upregulation of related genes. Long-term study further showed that the RO membranes flowing by the pretreated real CCW in a polypropylene plant exhibited a severer biofouling behavior than exposed control, and DBP and TBP parts played a key role in stimulation effects on bacterial proliferation. Overall, we demonstrate that RO membrane exposure to trace plasticizers in pretreated CCW can upregulate molecular processes and physiologic responses that accelerate membrane biofouling, which provides important implications for biofouling control strategies in membrane-based CCW treatment systems.
研究领域:
环境科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiayu Luo,Zhengshuo Zhan,Weiquan Li,Yang Lei
Electrochemical water softening, known for its chemical-free operation and modular design, offers a sustainable solution for cooling water management. However, the impact of antiscalants on the efficiency of electrochemical water softening remains poorly understood. Here we showed that even low concentrations (7.5 µM) of nitrilotris methylene phosphonic acid (NTMP), a representative antiscalant, significantly inhibit electrochemical softening efficiency while substantially increasing energy consumption. We propose a dual-benefit strategy integrating adsorption with electrochemically mediated precipitation to address this challenge in treating antiscalants-loaded cooling water. First, we probed the efficiency of iron-based adsorbents in mitigating NTMP under cooling water-relevant conditions. Our results show that bicarbonate hinders NTMP adsorption by altering the solution pH and the surface charge of the adsorbents. In contrast, hardness ions (Ca 2+ and Mg 2+ ) enhance NTMP adsorption by forming ternary complexes. Following adsorption, the subsequent electrochemical treatment achieves 83% calcium hardness removal at 20 A/m 2 with an energy consumption of 11.1 kWh/kg CaCO 3 in synthetic solutions. Notably, NTMP molecules desorbed from iron-based adsorbents retain their full anti-scaling capacity (100%), enabling recovery and reuse. This dual-function strategy mitigates antiscalant inhibition, enhances softening efficiency, and enables antiscalant recovery for reuse, advancing sustainable water treatment.
研究领域:
环境科学
·
水处理技术
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Kai Wu,Yi Zhang,Fang Ge,Xin Huang,Hong-Hua Ge,Yu-Zeng Zhao,Xin-Jing Meng,Bin-Lin Dou
A stable TiO 2 nanofluid with absolute value of Zeta potential greater than 44 mV was prepared by using sodium dodecylbenzene sulfonate (SDBS) as a dispersing agent in this paper. Electrochemical methods and surface analysis were used to study the corrosion behavior of brass in simulated cooling water (SCW), simulated cooling water containing SDSB (SCW-SDBS), and TiO 2 nanofluid (SCW-SDBS-TiO 2 nanofluid). The results show that the total resistance R sum of the brass electrode was smallest and increased slowly with time, and the corrosion current density was largest in SCW. The corrosion products on the brass surface were composed of the inner layer of Cu 2 O and the outer layer of Zn 5 (CO 3 ) 2 (OH) 6 . In SCW-SDBS medium, the R sum value of brass increased rapidly in the first 4 days and was significantly higher than that in SCW. A protective adsorption SDBS film was formed on the brass surface and minimized the corrosion rate of brass in SCW-SDBS medium. In SCW-SDBS-TiO 2 nanofluid, the R sum value of brass was higher than that in SCW, but significantly lower than that in SCW-SDBS medium. There was almost no SDBS adsorption film formed on the brass surface in SCW-SDBS-TiO 2 nanofluid, which significantly reduced the corrosion inhibition performance of SDBS on brass. The competitive adsorption of negatively charged TiO 2 nanoparticles and SDBS anions in the nanofluid on the brass surface might be the reason why the protective SDBS adsorption film was not easy to form on the brass surface in SCW-SDBS-TiO 2 nanofluid.
研究领域:
材料科学
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电化学
·
表面科学
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产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Lijun Gao,Tianming Gao,Jiuying Feng,Shaohong Mo,Yanbei Guo,Pingping Guo,Shiyun Pan,Yuqing Cheng,Qian Yang
Currently, antiscalants used in cooling water are expected to be environmental-friendly, good scale inhibitive, fluorescence tracing, and industrial-friendly. Aliphatic biodegradable photoluminescent polymers (BPLPs) synthesized from citric acid , aliphatic diols , and various amino acids are fluorescent polymers containing heteroatom six-membered conjugated ring chromophores . Their cross-linked BPLPs have potential for use as implant or device materials, and vivo bioimaging probes. However, so far, no one has found that BPLPs can be used as efficient antiscalants for cooling water. In this work, we demonstrate a facile one-pot microwave-assisted synthesis of BPLPs from cost-effective materials. The products were characterized by Fourier transforms infrared spectroscopy , 1 H and 13 C nuclear magnetic resonance spectroscopy , gel permeation chromatography , and fluorescence spectroscopy . Thus prepared BPLPs can be directly used as a novel type green fluorescent antiscalant without further purification. They have an excellent calcium phosphate inhibition efficiency that can reach 98.6 % with a dosage of 25 mg·L −1 in the static scale inhibition test at 80 °C.
研究领域:
材料科学
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环境工程
·
工业应用
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产品关联
DOI
高影响因子
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
·
2019
·Vol. 70
·期 11
·1964-1976
·
IF 1.458
Jin Li,Daquan Zhang,Kai Zhang,Lixin Gao,Cheng Shi,Donghui Chen,Manhong Huang
The triazole inhibitor of 1-(p-tolylthio)-1H-1,2,3-triazole-4-carboxylic acid (TTC) was synthesized via the Cu(I)-catalyzed azide-alkyne 1,3-dipolar cycloaddition reaction. The self-assembling method was performed to fabricate the self-assembled film of TTC on the copper surface. The electrochemical measurement results indicate that the TTC film can efficiently protect the copper from corrosion in high concentrated industrial cooling water. The protection efficiency of TTC film for copper is 92.2%. Surface characterizations imply that the copper with TTC film after corrosion is covered with multiple protective layers. It probably contains Cu(I) and Cu(II) complexes mixed with nitrogenous compound, Cl − and SO 4 2− . The result of quantum chemical calculation shows that the superior performance of TTC film is related to the adsorption of TTC molecules on copper surface horizontally. This kind of adsorption is mainly achieved via the adsorption centers of triazole ring and O atoms in TTC molecule.
研究领域:
材料科学
·
腐蚀与防护
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Qun Yuan,Hong-Hua Ge,Jun-Yi Sha,Le-Tian Wang,Chuan Wan,Feng Wang,Kai Wu,Xin-Jing Meng,Yu-Zeng Zhao
The influence of Al 2 O 3 nanoparticles on the corrosion behavior of brass in simulated cooling water (SCW) with or without sodium dodecyl benzene sulfonate (SDBS) was investigated by means of electrochemical impedance spectroscopy , polarization curves, scanning electron microscope, energy spectrum analysis, X-ray diffraction and Fourier transform infrared spectroscopy . Results indicate that the brass suffered severe corrosion in SCW and the SCW-Al 2 O 3 nanofluid. The main corrosion product was Zn 5 (OH) 6 (CO 3 ) 2 . Al 2 O 3 nanoparticles promoted both anodic and cathodic processes in the brass electrode, and dezincification was most serious in the SCW-Al 2 O 3 nanofluid. The adsorption of SDBS on the brass surface was enhanced, and a more compact protective film was formed on the brass surface in the SCW-Al 2 O 3 -SDBS nanofluid. As a result, the corrosion resistance of brass was increased in this medium.
研究领域:
材料科学
·
电化学
·
表面工程
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产品关联
DOI
高影响因子
Water
·
2024
·Vol. 16
·期 8
·1182
·
IF 3
Ping Xu,Xingrun Chen
Developing environmentally friendly and biodegradable corrosion inhibitors is an important research direction due to the toxicity and non-degradability of conventional carbon steel corrosion inhibitors added to circulating cooling water environments. Polysaccharides in EPSs (Exopolysaccharides) can be used as green corrosion inhibitors, but a low inhibition rate limits their practical application. Chemical modification is widely used to modify the functionality of polysaccharides by altering their physicochemical properties and structures, thereby enhancing or supplementing their functional characteristics. In this study, we employed chloroacetic acid as an esterifying agent to chemically modify Dextran and successfully synthesized a modified polysaccharide derivative with a substitution degree of 0.326. This derivative efficiently inhibited the corrosion of carbon steel in circulating cooling water environments. The carboxymethylated dextran (CM-Dextran) formed after synthesis could adsorb onto metal surfaces to form a protective film, thereby inhibiting metal surface dissolution reactions and exhibiting anodic corrosion inhibition properties. The experimental results showed that the corrosion inhibition efficiency of CM-Dextran after modification increased by up to 57.4%, with a maximum inhibition efficiency of 82.52% at a concentration of 4 mg/mL. This study provides new insights and opportunities for the development of environmentally friendly corrosion inhibitors derived from polysaccharides.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Jiayu Luo,Zhengshuo Zhan,Yang Lei
Electrochemically mediated precipitation is promising for cooling water softening. However, the performance of this strategy is limited by the requirement of sufficient cathode surface area. To overcome this limitation, we propose using three-dimensional (3D) cathodes, which provide more deposition sites than two-dimensional (2D) cathodes under the same dimension. We systematically evaluated the softening performance of the 3D cathode as a function of applied current density, electrode spacing, electrode size , and Ca 2+ /HCO 3 − molar ratio in water samples. The results suggest both cathode size and current intensity affect softening performance, while a lower electrode gap reduces cell voltage and energy consumption without lowering softening performance. In actual phosphonates containing cooling water, electrochemical softening with 3D Ni foam removes 65.5% Ca and 35.5% Mg in 8 h electrolysis at 80 A/m 2 . We further confirmed the long-term stability of 3D system over 100 days of continuous flow operation with >50% hardness removal from synthetic solutions. The cell voltage remains relatively stable despite pronounced scaling deposition (up to 2 cm thickness). Collectively, the 3D foam cathode greatly enhances the softening performance and ensures long-term operation without maintenance. These findings are expected to provide valuable insights for the future scaling-up of 3D electrodes in water softening.
研究领域:
环境工程
·
水处理
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Results in Engineering
·
2023
·
IF 5
Yumeng Xu,Kunyu Chen,Chenlu Yan,Ping Li,Heliang Pang,Jinsuo Lu
The present study investigated the inhibitory role of ginkgo fallen leaves on scale generation in industrial circulating cooling water (ICCW), and the dual scale inhibition mechanism was revealed to demonstrate the ICCW engineering application potential of ginkgo fallen leaves treatment. The results showed that pH, alkalinity and turbidity decreased from 8.68, 295.74 mg/L and 2.482 NTU to 7.27, 111.23 mg/L and 0.483 NTU, respectively, after adding 7.5 g/L fallen leaves in 2 h. The ascorbic acid released by the fallen leaves not only decreased the ICCW alkalinity, but also complexed with the residual Ca 2+ to form calcium ascorbate, which combined to inhibit the ICCW scale generation. Finally, compared to other chemical scale inhibition methods, fallen leaves treatment could save 0.34–850 CNY/ton in agent costs. Also, no additional building area was required, saving infrastructure costs. Therefore, turning fallen leaves waste into treasure provided the green and sustainable innovative strategy for scale inhibition in the ICCW, and has significant potential for engineering applications.
研究领域:
环境工程
·
水处理
·
可持续发展
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Lingyu Song,Yongbao Zhu,Jinfeng Wang,Tingxia Wu,Shuo Zhou,Xianbo Zhang,Junping Tang,Jikui Wang,Donghai Lin,Guosong Chen
The iron ion in industrial circulating cooling water is an important indicator for early warning of equipment corrosion and control level. It is interesting to construct an upconversion luminescence iron ion nanoprobe with a common inorganic phosphate water treatment agent. Herein, inorganic phosphate sodium hexametaphosphate (SHMP) was used to regulate the morphology and functionalization of NaYF 4 :Yb 3+ , Er 3+ upconversion luminescent nanoprobe (UCNPs) and applied to fluorometric detection of trace Fe(III) in water based on the fluorescence quenching which is caused by the selective coordination between hexametaphosphate on the surface of UCNPs and Fe(III). The structure, morphology, and luminous intensity of UCNPs were regulated by disodium hydrogen phosphate (ADSP), sodium tripolyphosphate (STPP) and sodium hexametaphosphate(SHMP). The UCNPs functionalized with SHMP has high sensitivity and selectivity for Fe(III) detection. The linear range and detection limit are 1.0–50 μM and 0.2 μM, respectively. The method has satisfactory results for the detection of trace Fe(III) in industrial circulating cooling water.
研究领域:
材料科学
·
分析化学
·
环境科学
✓ 已验证
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）