Desalination and Water Treatment
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2024
·
IF 1
Chao Yang,Jun Yang,Ge Song,Limin Zang,Qifan Liu,Jianhui Qiu,Xue Yang,Chun Wang
Oil/water separation has recently attracted a great deal of attention for research due to the frequent occurrence of an oil spill as well as the increase of industrial and household oily wastewater. Therefore, the purpose of this study is to demonstrate underwater superoleophobic crosslinked phosphorylated poly(vinyl alcohol) hydrogel coated stainless steel mesh (CL-PPVA@SSM), which was fabricated using a simple dip-coating method and aldol reaction on the mesh substrate. The as-prepared CL-PPVA@SSM is capable of separating oil from a variety of different oil/water mixtures with high separation efficiency up to 99.2%, excellent recyclability and fast water permeate flux of 467.7 L m –2 h –1 , which makes it suitable for the separation of oil-water mixtures from oil-water emulsions. Also, in the oil-water separation process, the CL-PPVA@SSM is capable to remove organic dye from the water. The CL-PPVA@SSM exhibits stability under various harsh conditions such as mechanical abrasion. Importantly, the CL-PPVA@SSM shows a massive potential to separate kitchen waste oil/water mixtures due to the underwater superoleophobic property as required for the recycling of kitchen waste oil. Therefore, this method has been met with a promising application prospect of practical application.
研究领域:
材料科学
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环境工程
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高分子化学
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表面工程
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化学工程
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纳米技术
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水处理技术
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 18
·53492-53504
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IF 5.8
Tang Hao,Liu Xiaolong,Li Yiren,Tian Jinglei,Hou Changjiang,Tian Mengkui,Zhu Tingyu
Based on the unique technique property of grate–kiln pellet production process and its demand of ultra-low emission of NO x , a low energy-consumed embedded selective catalytic reduction (SCR) denitration technology was proposed. The temperature of the NO x -containing tributary flue gas was 350–500 °C, which basically accorded with the temperature range of SCR by V 2 O 5 -based catalyst. Considering the potential inhibition effect of high SO 2 concentration (8000–10000 mg/m 3 ) and metal-containing dust in the pelletizing flue gas, the catalyst compositions were optimized to V 2 O 5 (0.5%) and WO 3 (5%), giving NO conversion over 90% with low yield of N 2 O by-product. Compared with the low-medium temperature SCR technology, it was no longer necessary to reheat the flue gas, showing a remarkable CO 2 emission reduction effect. The CO 2 emission reduction ratios were 94% and 66% contributed by the decrease of fuel and electricity consumption for the embedded SCR technology, respectively. The operating cost was also greatly reduced from 11.4 CNY/t-pellet to 3.1 CNY/t-pellet (Chinese Yuan).
研究领域:
环境工程
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大气污染控制
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化学工程
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能源与环境科学
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工业生态学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2011
·
IF 3.723
Hui Wang,Yuming Huang
Prussian-blue (PB)-modified γ-Fe 2 O 3 magnetic nanoparticles (PBMNPs) were successfully synthesized based on electric interactions between negatively charged [Fe(CN) 6 ] 4− and positively charged γ-Fe 2 O 3 nanoparticles. The in situ PB coating was generated by the coordinating reaction between the adsorbed [Fe(CN) 6 ] 4− and the ferric ions on the surface of γ-Fe 2 O 3 NPs. The as-prepared PBMNPs were characterized by FT-IR, XRD, TEM, and used to remove organic pollutants from aqueous solution, namely, using methylene blue (MB) as model compound. The experimental results showed that the target compound could be removed efficiently from solution over a wide pH range from 3 to 10 in the presence of PBMNPs as peroxidase-like catalyst and H 2 O 2 as oxidant. Under optimal conditions, MB could be removed completely after 120 min of reaction at 298 K; the chemical oxygen demand (COD) removal efficiency and the total organic carbon (TOC) abatement efficiency were 53.6% and 35%, respectively. Furthermore, the PBMNPs catalysts showed high magnetization, temperature tolerance, long-term storage and operational stability, and they could be readily separated from solution by applying an external magnetic field. Finally, a possible reaction mechanism for MB degradation was also discussed.
研究领域:
环境科学
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纳米材料学
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催化化学
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水处理技术
·
环境功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Junbin Liao,Jiajie Zhu,Shanshan Yang,Nengxiu Pan,Xinyan Yu,Chao Wang,Jun Li,Jiangnan Shen
Developing highly ion conductive and desirable electrodialysis (ED) performance anion exchange membranes (AEMs) is of great significance. In this work, we report a strategy for fabricating novel AEMs based on a series of fluoro-methyl poly(arylene ether ketone)s having long-side-chain imidazolium groups for ED. Having hydrophilic conductive flexible side-chain imidazolium groups and rigid hydrophobic backbone within AEM matrix, the optimized AEM (PAEK-60-im) shows low water uptake of 24.9% at 80 °C and desirable ion conductivity of 22.01 mS cm –1 at 30 °C. In NaCl removal application of ED, PAEK-60-im shows the NaCl removal ratio of 69.66% within 120 min, outperforming commercial AEM-Type II (68.98%). Accordingly, it has a higher current efficiency of 83.7% but lower energy consumption of 5.9 kWh kg –1 , compared with the commercial one (82.0%; 6.6 kWh kg –1 ). In particular, in selectrodialysis application, possibly owing to the synergistic effect of pore-size sieving effect resulting from macro-separation morphology and hydration energy difference of SO 4 2– ions (–1000 kJ mol –1 ) and Cl – ions (–317 kJ mol –1 ) in feeding solution, PAEK-60-im shows significantly superior monovalent anion perm-selectivity (Cl − /SO 4 2− ) of 7.70 at 30 min, relative to commercial anion-selective Neosepta ACS (5.27) and many other reported mono-valent anion selective AEMs having elegant surface modified layers. The superior ED performance of the homogeneous PAEK-60-im is suggestive of its potential separation application.
研究领域:
材料科学
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化学工程
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电化学
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膜技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）