JOM
·
2022
·Vol. 74
·期 5
·1958-1968
·
IF 2.597
Luo Yinbo,He Dongfeng
Indirect carbonation as an efficient CO 2 sequestration strategy has received extensive attention in recent years. This study proposes a two-step leaching indirect carbonation process using NH 4 Cl and CH 3 COOH in order to combine the advantages of the two leaching agents to obtain a better experimental outcome. The experimental results show that NH 4 Cl has a high pH buffering capacity, which can increase the pH of the mixed leachate to an alkaline level. Among the 21 groups of mixed leachate, 17 were alkaline (pH > 7). The mixed leachate has a high Ca 2+ ions carbonation rate under low CH 3 COOH concentration conditions, and the carbonation rate of steel slag with a particle size of < 38 μm can reach 60% when the CH 3 COOH concentration is 0.1 M. SEM imaging showed that the CaCO 3 formed by the reaction exists in a hexagonal calcite crystal form.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 18
·6221
·
IF 3.4
Junxue Chen,Zheng Chen,Junjiao Yang
The corrosion resistance of zinc–aluminum–magnesium steel plates (Zn–Al–Mg steel plates) is significantly higher than that of galvanized steel plates. However, the unsatisfactory bonding performance of Zn–Al–Mg steel plates significantly limits their widespread application. In this study, X-ray photoelectron spectroscopy is employed to detect changes in the surface oxygen content of Zn–Al–Mg steel plates after different temperature treatments to confirm the existence of surface loose layers. In particular, changes in the surface oxygen content of the Zn–Al–Mg steel plates after the oxide layer is removed are investigated under saturated H2O vapor and O2environmental conditions, and the cause of the formation of loose surface layers is determined. The uneven distribution of elements on the surface of the Zn–Al–Mg steel plates is investigated with scanning electron microscopy and energy dispersive spectroscopy. Nuclear magnetic resonance is employed to determine the size of the network spatial structure formed by silane coupling agents under different hydrolysis conditions and to further investigate the bonding performance of hydrolysate-modified Zn–Al–Mg steel plates. Several typical automotive adhesives are utilized to compare and examine the changes in the tensile strength of the Zn–Al–Mg steel plate bonding before and after modification with the silane coupling agent and analyze the structural damage of the adhesive at the bonding interface. The results confirm that the silane coupling agent strengthens the loose layer on the surface of the Zn–Al–Mg steel plate.Keywords:zinc–aluminum–magnesium steel plate;loose layer;silane coupling agent
研究领域:
材料科学
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表面工程
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
·
2024
·Vol. 56
·期 10
·596-612
·
IF 1.5
Xue-qi Zhang,Qing-xian Yue,Rui Ding,Jie Liu
Corrosion protection of steel bars in alkaline concrete environments poses a common challenge in marine engineering. One approach to mitigate steel bar corrosion is the addition of corrosion inhibitors to the concrete. In alkaline environments, the passivation of rebars occurs through anodic passivation coupled with the cathodic oxygen reduction reaction (ORR). The catalysis of ORR can expedite anode passivation. To investigate the corrosion inhibition of steel bars in alkaline environments, meso-tetra(4-carboxyphenyl)porphine (TCPP), known for its ORR catalytic properties, is selected. TCPP forms adsorption films on the surface of steel bars, facilitating the formation of passivation films. TCPP primarily adsorbs onto active sites on the surface of the passivation film, where lattice iron ions have leached. The adsorbed TCPP accelerates the formation of the passivation film through ORR catalysis, inhibiting the development of passivation film defects and enhancing the integrity and protection of the passivation film. The most significant effect is observed when the concentration of TCPP is 0.5 mmol/L. The physical adsorption of TCPP is primarily determined by the negative charge centers, namely the carboxyl group O and the pyrrole N. However, due to steric hindrance caused by the unrestricted rotation of the carboxyl benzene, the pyrrole N does not play a dominant role in chemical adsorption. Instead, the active site for chemical adsorption is the carboxyl group O. The adsorption process significantly reduces the diffusion coefficient of TCPP molecules, providing a robust and stable adsorption binding. Phthalocyanine molecules without carboxyl benzene groups adopt a planar structure, allowing them to form stable adsorption configurations on the iron surface through flat adsorption. This observation provides guidance for the design of novel metal phthalocyanine molecules. Specifically, the development of metal phthalocyanine molecules with modifying groups that are coplanar with the phthalocyanine ring and possess restricted rotation can achieve flat adsorption, improve coverage rate, and enhance adsorption configuration stability.
研究领域:
材料科学
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腐蚀工程
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DOI
高影响因子
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
·
2019
·Vol. 91
·期 12
·2058-2064
·
IF 0.508
Zhan Yingqing,Zhao Rui,He Shuangjiang,Zhao Shumei,Xue Weidong
Development of novel corrosion inhibitors is important for improving the anticorrosion of carbon steel because the serious carbon steel corrosion causes enormous economic losses to humankind. In this work, we demonstrated the novel organic functionalized Fe 3 O 4 hybrid inhibitor for enhancing the anticorrosion performance of carbon steel. For this purpose, amino-Fe 3 O 4 nano-spheres (NH2–Fe 3 O 4 ) were prepared via solvothermal route, using FeCl 3 .6H 2 O as an iron source and 3-aminophenoxy-phthalonitrile as precursor. Then, the N,N-diethyl-3-amine methyl propionate (DM) was reacted with amino-Fe 3 O 4 nano-spheres to produce the organic functionalized nano-Fe 3 O 4 hybrid. The chemical composition and micro-structure of as-obtained organic functionalized Fe 3 O 4 hybrid were characterized and confirmed by Fourier transform infrared, X-ray diffraction, and scanning electron microscopy. Furthermore, the anticorrosion performance of carbon steel by addition of organic functionalized nano-Fe 3 O 4 inhibitor was investigated by AC impedance measurements and polarization curves. The research results showed that the organic functionalized nano-Fe 3 O 4 exhibited enhanced inhibition effect for carbon steel, which can be used as a new type of carbon steel corrosion inhibitor.
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
·
IF 6.9
Qing Shao,Yiyi Yi,Yuxiang Xie,Haike Yang,Jingyi Guo,Zizheng Liu,Yiqun Chen,Jun Wan
The utilization of steel slag as an adsorbent for wastewater treatment (e.g., phosphorus removal) is a promising direction for the simultaneous disposal of solid waste and eutrophication control. In this study, 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) was selected as a representative phosphonate and its adsorption performance and mechanism on steel slag were explored. The experiment results show that for the HEDP solution with a concentration of 0–50 mg/L, the removal efficiency of steel slag was 85–88% and the adsorption capacity was 0.0835–8.2793 mg-P/g. The HEDP adsorption behavior on steel slag conformed to the pseudo-second-order adsorption kinetics model. Both the Freundlich and Langmuir adsorption isotherm models can describe the experimental data well. And the theoretical maximum adsorption capacity at 25°C was calculated as 23.74 mg-P/g. Combined with our SEM, XRD, FTIR, and XPS analyses, the adsorption mechanism involved ligand exchange, hydrogen bond interaction, and electrostatic attraction. After 5 reuse cycles, the regeneration efficiency of steel slag remained 77% by using 1 mol/L NaOH. The research work in this paper proves that steel slag, as a solid waste with large emissions in China, can effectively remove HEDP, which supplies a new way for the resource utilization of steel slag.
研究领域:
环境科学
·
废水处理
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Xu Ren,Peixin Tang,Bo Hou,Zhuyi Yu,Jin Huang,Qingyuan Wang,Kai Song
This study investigated the efficiency of a sequential batch three-dimensional electrode reactor (3DER) using stainless steel electrodes and Mn-loaded steel slag as the particle electrodes (PE) to degrade refractory organics. The PE, a micron-grade material consisting primarily of SiO 2 , Fe 2 O 3 , and MnO 2 , exhibits excellent electric conductivity and catalysis ability. Then, a single-factor experiment determined the optimal conditions for removing 20 mg·L −1 of RhB in the 3DER. It involved introducing 5 mM H 2 O 2 and 1.0 g·L −1 PE to 200 mL of simulated wastewater under acidic-to-neutral conditions, under a current density of 57.14 mA·cm −2 and 15 mm distance between 2D electrodes. Approximately 99.52% RhB removal after 15 min of reaction was achieved. Although the inorganic ions in actual water negatively affect the 3DER performance, the system still showed excellent applicability in treating wastewater. In addition, the RhB degradation pathway was explored by determining the reactive oxidizing species (ROS) and intermediate products. The results illustrated that HO• (the main ROS that degraded organics) and SO 4 •− existed in the 3DER. Through de-ethylation, ring-opening, and C-C or C C bone rupturing, RhB degraded to chain organics with simple molecular structures before finally mineralizing to CO 2 , H 2 O, NO 3 - , and NH 4 + . In summary, this research informs on the potential of 3DER for removing refractory organics from water.
研究领域:
环境工程
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化学工程
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水处理
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Ting Shi,Mengxin Guo,Hongcheng Gao,Yi Wang,He Li,Mingming Wu,Dongyuan Cheng,Yi Han,Dejin Wang
Tetracycline as a common emerging pollutant has received widespread attention worldwide. In this paper, RMSSx:y composite pellets were prepared by an annealing process to adsorb tetracycline (TC) from wastewater using red mud (RM) and steel slag (SS) as raw materials. The RMSS5:5 composite pellets prepared with a mass ratio of 5:5 at a calcination temperature of 900 °C exhibited excellent adsorption properties. The experimental data were analyzed using Langmuir, Freundlich, and Temkin adsorption models. The equilibrium data fitted both the Langmuir and Freundlich models well. Kinetic adsorption data were analyzed using the quasi-primary kinetic model, the pseudo-secondary kinetic model, the intraparticle diffusion model, and the Boyd model. The maximum adsorption capacity of RMSS5:5 for TC reached 183.78 mg/g. Thermodynamic studies revealed the exothermic and spontaneous nature of the adsorption process. The adsorption mechanism involved the complexation of Fe, Ca with TC, hydrogen bonding, electrostatic interaction, and physisorption. In addition, RMSS5:5 possessed excellent magnetic responsive properties and cycling performance. This study successfully prepared an efficient and cost-effective adsorbent with two industrial solid wastes, which has great potential for TC removal from wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 39
·e202402554
·
IF 1.9
Yu-chen Zhang,Xuan Liang,Rui Ding,An-lan Ji,Yu-han Wang,Ming-di Lei,Jie Fu,Jie Liu
Graphical The corrosion inhibition of NH 2 and OH substituted benzothiazoles on carbon steel in 0.5 mol/L HCl was investigated. 0.0010 mol/L 2-amino-6-hydroxybenzothiazole demonstrated efficient and persistent performance. The adsorption followed Freundlich-Langmuir isotherm. The OH at 6th position extended negative potential region and enhanced coordination activity, resulting in favorable orbital distribution for flat adsorption and feedback bonds. In the pickling process and acidizing program for oil wells, the acidic corrosion of metals is a problem that needs to be addressed. Various acid corrosion inhibitors have been studied and used to mitigate the acidic corrosion of carbon steel. In this paper, the corrosion inhibition of 2-aminobenzothiazole (2 N-BT), 2-amino-4-hydroxybenzothiazole (2 N4O-BT), and 2-amino-6-hydroxybenzothiazole (2 N6O-BT) on carbon steel in 0.5 mol/L HCl was investigated using electrochemical and quantum chemical methods. All three molecules exhibited corrosion inhibition effects. Compared to 2 N-BT, 2 N4O-BT and 2 N6O-BT showed less sensitivity to the environmental conditions and the surface state of the metal. Among them, 0.0010 mol/L 2 N6O-BT demonstrated the highest and most persistent corrosion inhibition, exhibiting a mixed inhibition mechanism with cathodic inhibition dominance. The adsorption of 2 N6O-BT on the carbon steel surface was found to be non-uniform, preferentially adsorbing at certain active sites on the surface, following Freundlich-Langmuir thermodynamic characteristics. It showed initial strongly adsorbed points and weakly adsorbed regions. With continued adsorption of 2 N6O-BT, the differences between strongly adsorbed points and weakly adsorbed regions decreased. The introduction of hydroxyl groups, especially in 2 N6O-BT, extended the negative potential region and enhanced the coordination activity of the molecule, generating the orbital distribution that was advantageous to flat adsorption and the formation of feedback bonds. This provided a molecular structural basis for the excellent corrosion inhibition properties of 2 N6O-BT.
研究领域:
材料科学
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电化学
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量子化学
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DOI
高影响因子
Journal of Building Engineering
·
2024
·
IF 6.7
Jinglong Huang,Yilian Li,Yunhua Zhang
In order to improve the carbonation properties of steel slag, the carbonation reaction process of steel slag and the formation of carbonation products were regulated by the interaction between multiple hydroxyl groups within β-cyclodextrin (β-CD) molecule and calcium ions leached from steel slag. Through a meticulous experimental design, varying contents of β-CD, from 0.0 % to 5.0 %, were mixed with steel slag to investigate their impact on carbonation kinetics, mechanical strength, and microstructural evolution. The results indicate that β-CD significantly accelerates the carbonation process of steel slag, with a particular boost to the carbonation of β-dicalcium silicate (β-C 2 S), a key mineral contributing to the carbonation activity. At an optimal β-CD concentration of 2.5 %, the compressive strength of the treated slag reached a peak of 138.5 MPa, marking a 13.4 % improvement over the control sample. Similarly, the CO 2 uptake was optimized at 17.9 %, increasing by 21.8 %. Mechanism analysis reveals that β-CD not only facilitates carbonation but also refines the resulting carbonation products, leading to a denser microstructure and enhanced mechanical properties. However, at a β-CD content of 5.0 %, the carbonation process was hindered by excessive viscosity. These pivotal findings propose an innovative strategy to augment the efficiency of carbonation and the inherent material properties of steel slag, thereby fostering a more sustainable approach to the utilization of industrial byproducts.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Xianliang Li,Bin Gong,Yijie Jin,Zhihao Chen,Wenzhong Yang
In this study, we present a facile strategy to construct a smart PN-Zn-MOF-74 nanocontainer-based coating with outstanding triple functions including the barrier effect, as well as self-healing and self-reporting features. Flattened 2D PN-Zn-MOF-74 nanocontainers were synthesized by decorating the hexagonal boron nitride (h-BN) sheets with a polydopamine (PDA) layer, which was employed to interlink the Zn-MOF-74 nanodevices. The composite nanocontainers were then uniformly dispersed in a waterborne epoxy coating (WEC) and coated onto Q235 mild steel surfaces. Thus, as the Fe 3+ and H + ions were gradually released from the localized corrosion sites, the encapsulated active inhibitors (Zn 2+ and PDA) in PN-Zn-MOF-74 were exchanged and released promptly to form a robust protective film, coating the micro-damaged sites. The EIS results indicated that PN-Zn-MOF-74 with two inhibitors demonstrated a remarkable active corrosion protection performance, with the |Z| 0.01Hz value increasing from 381 Ω cm 2 (blank) to 1389 Ω cm 2 (PN-Zn-MOF-74). However, the cation exchange between Fe 3+ and Zn 2+ can collapse the fluorescent Zn-MOF-74 and form a weak fluorescent compound at the damage sites, achieving the self-reporting ability of the coating. In addition, the coating adhesion test and cross-sectional images showed that the presence of PN-Zn-MOF-74 can effectively strengthen the impermeability of the composite coating, guaranteeing its long-lasting barrier properties. The coating demonstrated a higher |Z| 0.01Hz value (4.91 × 10 9 Ω cm 2 ) despite following 504-h immersion tests, which was over 2 orders of magnitude higher than that of the blank WEC coating. This study provides a simplified and feasible method for augmenting the dependability, practicality, and versatility of anti-corrosion polymer coatings.
研究领域:
材料科学
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腐蚀与防护
·
纳米技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2024
·Vol. 47
·期 10
·e202400203
·
IF 1.8
Jinwei Qi,Jihui Li,Kaili Liu,Huixin Zhang,Jian Han,Jianxin Chen
The curcumin-malic acid-aspartic acid polymer (PCMA) as a new water treatment agent was prepared by solid phase synthesis of curcumin, malic acid and aspartic acid. The static scale inhibition experiments showed that PCMA can inhibit CaCO 3 and CaSO 4 scale formation by 100.0 % and had excellent scale inhibition effect under various experimental conditions. The mechanism of action of PCMA was obtained by X-ray diffraction, scanning electron microscope and molecular dynamics simulation. Electrochemical test showed that PCMA is an anodic corrosion inhibitor that achieves 93.1 % corrosion inhibition by forming a protective film on the surface of Q235 carbon steel. Besides, fluorescence spectra proved that PCMA has stable fluorescence intensity.
研究领域:
材料科学
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化学工程
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电化学
✓ 已验证
产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2022
·
IF 5.479
Lianghua Wang,Pingfeng Fu,Yanhong Ma,Xuejin Zhang,Yabao Zhang,Xiumin Yang
Flotation reagents and heavy metal ions always coexist in mineral flotation wastewaters, arousing serious environmental issues or having deleterious effects on mineral flotation. In this work, the steel slag was adopted as a cost-effective adsorbent to synergically remove butyl xanthate (BX), diethyl dithiocarbamate (DDTC), Cu(II) and Pb(II) ions. At the steel slag dosage of 12.0 g/L, Cu(II) and Pb(II) concentrations decreased from 4.0 mg/L to below 10.0 μg/L, and the removal of COD reached 54.33%. The removal efficiency of COD increased from 11.36% to 57.49% as Cu(II) and Pb(II) concentrations rose from 0 to 8.0 mg/L, revealing the promotion effects of metallic ions on collector adsorption. The maximum uptake capacity of steel slag reached 110.45 and 160.48 mg/g for Cu(II) and Pb(II), respectively. The collector adsorption capacity of steel slag increased nearly two magnitudes after modifying with the uptake of Cu(II) or Pb(II) ions. The SEM/EDS, XPS and FTIR analysis indicated that steel slag could be in-situ modified to generate copper or lead hydroxides and oxides during the removal of Cu(II) and Pb(II) ions. Subsequently, these precipitates acted as reactive sites for chelating BX and DDTC to form indissolvable metal-collector chelates. Owing to in-situ modification of steel slag by uptaking metallic ions, the adsorption was potentially feasible for treating flotation wastewaters.
研究领域:
环境科学
·
矿物工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）