Asia-Pacific Journal of Chemical Engineering
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2023
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IF 1.8
Kai Fei,Zhuo Yi Dong,Li Shi,Xuan Meng,Naiwang Liu
Transformer oil plays a critical role in ensuring the insulation and normal operation of power transformers. However, during operation, the transformer oil would undergo oxidation and degradation, leading to the formation of acids and polar compounds that increase its acidity and degrade its performance. Hence, the recycling and regeneration of aged transformer oil is an essential practice in transformer maintenance, contributing significantly to the extension of a transformer's operational lifespan and the reduction of potential risks. Adsorption separation is a preferred method for regeneration, offering simplicity and high efficiency. This study focuses on impregnated γ-Al 2 O 3 as an adsorbent for acidity removal in waste transformer oil. We conducted static adsorption experiments to investigate the optimal loading amount of the active component and the best calcination temperature for acid removal. XRD technique is employed to monitor the phase changes of the carrier during the calcination process. BET analysis is used to observe variations in the specific surface area and pore volume of the adsorbent during the modification process. DTG-TGA is utilized to assess the weight loss during the calcination process. FTIR is employed to observe changes in functional groups during modification and adsorption processes. Along with these investigations, a study is also carried out to assess the dynamic acid removal performance of the acid-removing adsorbent loaded into a fixed bed. The findings contribute to the development of sustainable methods for regenerating transformer oil, ensuring efficient and environmentally friendly operations.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
iScience
·
2025
·Vol. 28
·期 8
·113127
·
IF 4.1
Chengzhuang Zhang,Jia Fang,Zhiqiang Han,Peng Chen,Xilong Xu,Kejian Wang,Yunxi Shi,Jianxiong Liao
CaO-based adsorbents present a promising approach for industrial CO 2 emissions reduction. This study systematically investigates the influence of adsorption temperature, adsorbent mass, CO 2 concentration, and flow rate on CO 2 capture efficiency using commercial CaO via thermogravimetric analysis (TGA). Optimal adsorption performance, achieving a capacity of 0.62 g/g and a rate exceeding 0.14 g/g/min, was observed at 750°C, 7 mg mass, 20% CO 2 , and 20 mL/min flow. Characterization (SEM, BET, and FTIR) indicated that 750°C preserved a hierarchical pore structure (24.64 m 2 /g surface area, 0.1026 cm 3 /g pore volume, and 7.08 nm average pore size), mitigating sintering and pore blockage while confining carbonation to surface layers. Kinetic modeling confirmed chemisorption dominance (pseudo-second-order). These findings elucidate fundamental mass/heat transfer limitations, supporting the development of enhanced CaO-based carbon capture, utilization, and storage (CCUS) technologies. Applied sciences; Chemistry; Environmental science.
研究领域:
应用科学
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化学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
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IF 9.038
Elvis Ikechukwu Nosike,Zhenqi Jiang,Lijing Miao,Ozioma Udochukwu Akakuru,Bo Yuan,Shasha Wu,Yuenan Zhang,Yujie Zhang,Aiguo Wu
This research reports a new mercury adsorbent in which Fe 3 O 4 as a core was embedded into the shell of ZIF-90 in a one-pot synthesis and the subsequent post synthesis modification (PSM) of its surface with cysteine covalently, via a Schiff’s base reaction. Poly acrylic acid (PAA) was capped on the surface of nanoparticles to prevent agglomeration of the nanoparticles. In addition, −COOH groups of PAA coordinated with Zn 2+ of ZIF-90 and this provided the platform for ZIF-90 to grow on the nanoparticles forming the core-shell structure. Based on the strong interactions between the thiol groups on the adsorbent and mercury ions as elucidated by the XPS analysis, the as-synthesized adsorbent showed selectivity for Hg 2+ . The sorbent exhibited high adsorption capacity of 900 mg g −1 towards Hg 2+ as calculated at pH 4 and the adsorption kinetics followed pseudo-second-order kinetics model better. The Hg 2+ loaded adsorbent was easily regenerated and it maintained about 70 % efficiency after the third use. Low-cost, readily available and green materials, facile preparation, efficient removal and the breakthrough in three times recyclability give the novel ZIF-90 based hybrid nanoadsorbent wide prospects in the field of environmental remediation as a good adsorbent for Hg 2+ removal in wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Nuclear Science and Techniques
·
2020
·Vol. 31
·期 4
·1-13
·
IF 1.556
Zhang Shi-Chang,Ning Shun-Yan,Zhou Jie,Wang Si-Yi,Zhang Wei,Wang Xin-Peng,Wei Yue-Zhou
A porous silica-polymer-based adsorbent, iso Bu-BTP/SiO 2 -P, was prepared by a vacuum impregnation method and used for the recovery of ruthenium, rhodium, and palladium from nitric acid solution. The experimental results revealed that iso Bu-BTP/SiO 2 -P exhibited unique adsorption properties such as high saturation adsorption capacity (Ru: 0.35 mmol g −1 , Rh: 0.32 mmol g −1 , Pd: 1.05 mmol g −1 ) and excellent selectivity over other metal ions, such as lanthanides (SF PGM/ M > 40) in 1 M HNO 3 solution. The adsorption process conformed to the pseudo-second-order model and Langmuir model. From the UV, FTIR, and XPS analyses, it can be concluded that the strong affinity between functional groups (C–N=C) and metal ions as well as NO 3 − played a role in coordination during the adsorption process. Furthermore, the desorption behavior was studied, and it was found that the adsorbed Pd, Rh, and Ru could be eluted with a 0.01 M nitric acid–0.1 M thiocarbamide solution, 5 M hydrochloric acid, and sodium hypochlorite (CP) solution, respectively. Finally, based on those findings, a simple process for the separation and recovery of Pd, Rh, and Ru from high-level liquid waste using iso Bu-BTP/SiO 2 -P was designed and proposed.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
FOOD CHEMISTRY
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2018
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IF 4.946
Manshun Liu,Jing Wang,Qingfeng Yang,Na Hu,Wentao Zhang,Wenxin Zhu,Rong Wang,Yourui Suo,Jianlong Wang
Patulin (PAT) is one of the most common toxic contaminants of apple juice, which causes severe food safety issues throughout the apple industry. In order to remove PAT efficiently, a metal-organic framework-based adsorbent (UiO-66(NH 2 )@Au-Cys) was successfully synthesized and used for PAT removal from juice-pH simulation solution and real apple juice. Batch adsorption experiments were systematically performed to study the adsorption behavior for PAT. The results showed that adsorption process could be well described by the Pseudo-second order model and Freundlich isotherm model. The maximum adsorption capacity (4.38 µg/mg) was 10 times higher than the microbe-based biosorbents. Thermodynamic investigation demonstrated that adsorption process was spontaneous and endothermic. Furthermore, no marked cytotoxicity on NIH 3T3 cell lines was observed when the concentration of the adsorbent was lower than 10 μg/mL. Therefore, UiO-66(NH 2 )@Au-Cys is a potential adsorbent for PAT removal from apple juice with little quality changes.
研究领域:
食品安全
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生物化学
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材料科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Zuopeng Guan,Fangbo Zhao,Xinyu Guo
ABSTRACT Zinc deplating waste liquid is considered hazardous due to the presence of heavy metal Zn(II) and hydrochloric acid, along with Fe(II). This study aims to develop a new adsorbent for efficient separation of zinc (II) from deplating waste liquid in a real factory. The novel adsorbent, PSCL-CQDs-NH 2 , was prepared by grafting home-made amino-rich carbon quantum dots (CQDs-NH 2 ) onto a chloromethyl polystyrene resin matrix. It has been observed that amino groups can be protonated under strongly acidic conditions, enabling them to adsorb negatively charged Zn(II)-Cl complexes while repelling positively charged Fe(II)-Cl complexes. The grafted nano-size CQDs-NH 2 can offer more adsorption positions to improve the adsorption properties. The results shown that PSCL-CQDs-NH 2 presented higher Zn(II) adsorption capacity and better performance in separating Zn(II) from Fe(II) compared to the conventional anion exchange resin (717). At 298 K, PSCL-CQDs-NH 2 showed a maximum Zn(II) adsorption capacity of 201.77 mg/g, and a selective Zn(II)/Fe(II) separation factor of 3033.72, which were 54.7% and 45.4 times higher than those of 717 resin. In the fixed bed adsorption process, PSCL-CQDs-NH 2 exhibited 61.5% higher adsorption performance than 717 resin when treating actual zinc deplating waste liquid. Moreover, the water consumption during regeneration of PSCL-CQDs-NH 2 is reduced by 10.3% compared to the 717 resin. These findings indicate that PSCL-CQDs-NH 2 is an effective material for the treatment of industrial zinc deplating waste liquid.
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
AICHE JOURNAL
·
2024
·Vol. 70
·期 7
·e18443
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IF 3.5
Kang Wang,Yao Jiang,Mingming Xu,Dongdong Zheng,Shaojun Jia,Peng Cui
Separation of CH 4 from natural gas is an essential but extremely challenging process in the petrochemical industry. Here, we tailored a MOF-based adsorbent with partitioned aliphatic pore spaces through the simultaneous incorporation of the aliphatic sites and the symmetrically matched partition agent. The resulting adsorbent demonstrates exceptional adsorption capacity for C 3 H 8 and C 2 H 6 compared to CH 4 , along with remarkably competitive adsorption selectivities for C 3 H 8 /CH 4 and C 2 H 6 /CH 4 . Breakthrough experiments further support the excellent dynamic separation efficiency of the adsorbent for the purification of CH 4 from natural gas. Moreover, detailed density functional theory calculations and molecular simulations elucidate the synergistic interactions between the aliphatic sites and the partitioned pore spaces within the adsorbent, which promote the stronger binding affinities for C 3 H 8 and C 2 H 6 over CH 4 .
研究领域:
材料科学
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化学工程
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能源技术
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产品关联
DOI
高影响因子
DESALINATION
·
2024
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IF 8.3
Guanhua Wang,Huibin Zhang,Weilun Qian,Anyang Tang,Huazhen Cao,Wenyu Feng,Guoqu Zheng
In this study, a spherogranular porous composite tin pyrophosphate antimonate (SSbPP) adsorbent was developed for the efficient extraction of rubidium (Rb) and cesium (Cs) resources. This granular composite adsorbent was prepared using the anti-solvent method with polyvinyl chloride (PVC) as carrier and the incorporated SSbPP powder as adsorbent. The composition , molecular structure, and adsorption performance of SSbPP, along with the microstructure and adsorption behavior of the granulated PVC-SSbPP adsorbent, were comprehensively investigated. The results showed that the SSbPP adsorbent with superior performance was synthesized at a Sn:Sb:P molar ratio of 0.5:0.25:2. The adsorption behavior of PVC-SSbPP was evaluated using the pseudo-second-order kinetic model and Langmuir isotherm. The maximal adsorption capacities of PVC-SSbPP for Rb + and Cs + were found to be 81.3 mg g −1 and 95.23 mg g −1 at optimal condition, respectively. The PVC-SSbPP also exhibited high adsorption selectivity for Rb + /Cs + in the presence of competitive metal ions such as K + , Na + , Li + , Mg 2+ and Ca 2+ . Furthermore, through dynamic adsorption-desorption experiment using a fixed-bed column, a low-concentration Rb + /Cs + solution (10 mg L −1 ) could be concentrated by approximately 140 times. This research offers a promising approach for the selective extraction of low-concentration Rb and Cs resources from highly saline solutions.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Ting Su,Hongxia Shang,Xinru Su,Zhixian Sun,Yuehan Li,Linwen Li,Zhen Zhang,Renyong Geng,Shuisheng Chen
In this investigation, a hydrogel adsorbent featuring remarkable efficiency in dye adsorption was successfully synthesized by the integration of natural polysaccharide (pullulan) and nanoparticles (ZIF-8@PDA). The prepared natural polysaccharide nanocomposite hydrogels not only exhibit superior mechanical strength and biocompatibility, but also demonstrate adeptness in the removal of dye pollutants. The dye removal capacities were 615.4 mg/g for malachite green (MG) and 525.8 mg/g for Congo red (CR), respectively. Notably, the adsorption process exhibits minimal susceptibility to variations in water quality and the presence of co-existing ions. The pH-responsive surface charge conversion capability of the adsorbent renders it recyclable, maintaining a dye adsorption performance exceeding 88 % even after 5 cycles of repeated usage. Overall, these environmentally friendly natural polysaccharide nanocomposite hydrogels hold potential for addressing complex wastewater treatment challenges and long-term use.
研究领域:
材料科学
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环境科学
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生物材料
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Mao Fu,Xuepeng Deng,Shi-Qiang Wang,Fenglin Yang,Li-Chiang Lin,Michael J. Zaworotko,Yingchao Dong
To find sustainable water solutions, the development of high capacity, scalable robust adsorbents and mechanistic insight about their performance offers the potential to effectively address the global challenges of water scarcity and water contamination. We herein rationally design Zr-cluster defective MOF-808 (MOF-808 def ) with exposed carboxyl groups, a robust zirconium metal–organic framework (Zr-MOF), exhibiting high adsorption capacity (q max ∼ 296 mg·g −1 ) coupled with high selectivitity for tetracycline (TC) antibiotics, outperforming other water-stable MOFs, commercial and inorganic nano-adsorbents. MOF-808 def functions well across a wide range of contaminant concentrations (from trace to high-concentration) and even in harsh conditions ( e.g. , high acidity and salinity). Both experimental and simulation results indicate that the mechanism of adsorption involves both physisorption and chemisorption via hydrogen bonding, electrostatic interactions (EIs) and C-O-C covalent bonding via esterification. Computational studies confirm that hydrogen bonding plays a key role in strong guest–host interactions between TCs and MOF-808 def . Further, defects resulting from missing-Zr-clusters in MOF-808 def are confirmed to enhance adsorption performance. Specifically, the defect sites present exposed carboxyl groups from MOF-808 def linker ligands that selectively react with –OH groups (phenol and tertiary alcohol moieties) in TC via esterification. These defects drive highly selective adsorption even at low concentrations of TCs ( e.g. , 500 ppb). Aiming for more than enhanced performance, economic estimation and scalable engineered reactor tests revealed that MOF-808 def and its nano-composites are free of environmental risks and offer promise for sustainable water treatment at pilot scale. The use of defect-engineering rationales is a molecule-level design concept that could be generally useful for the development of the next generation of MOF-based nano-adsorbents for sustainable water treatment applications.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Chengyu Duan,Jianyu Wang,Qikai Liu,Yi Zhou,Yanbo Zhou
Salbutamol (SAL) and Atenolol (ATL), two common medical ingredients acting on adrenal receptor, are often used for treating chronic illnesses. However, the incomplete metabolism in organism and widespread utilization lead to unneglected problems of water pollution, which the traditional treatment plant cannot satisfactorily deal with. For efficient removal of SAL and ATL, a kind of silanized β-cyclodextrin compound adsorbents (GD-EDTS) was designed based on the ionization features of two pollutants. Through an introduction of rich carboxyl groups by N-[(3-Trimethoxysilyl)propyl]ethylenediamine triaceticacid trisodium salt (EDTS), GD-EDTS surface obtains an appropriate electronegativity to meet different forms of IOCs and maintain a good adsorption performance in a wide pH range. The maximum adsorption capacities of SAL and ATL are 140.24 mg/g and 236.92 mg/g, respectively. And a remarkable rise is known from the adsorption capacity of SAL and ATL increasing to 162% and 706%, respectively, after EDTS modification. Adsorption data fit the Sips adsorption isotherms and the pseudo second-order kinetic model, and a weak competitive behavior between SAL and ATL indicates two pollutants can be removed simultaneously by GD-EDTS in their binary system. In this work, GD-EDTS is suggested to be an efficient adsorbent in the removal of SAL and ATL.
研究领域:
环境科学
·
药物化学
·
吸附材料研究
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL ENGINEERING
·
2024
·Vol. 150
·期 11
·04024050
·
IF 1.6
Huanglong Zhuang,Guiyang Yan,Jiwei Wang,Zhuang Hu,Siqi Yan,Yinkai Sun,Tuanyu Guo,Jianshe Hu,Aikebaier Reheman
This study presents a groundbreaking composite adsorbent, STB@MOF-808-SH, developed through the innovative amalgamation of thiol-functionalized metal-organic framework material (MOF-808-SH) with sulfur-doped C3N4 tubular bundles (STB), targeting the effective elimination of toxic mercury [Hg(II)] ions from polluted water. Our investigation explores crucial determinants of the adsorption process, including pH, initial Hg(II) concentration, and the impact of coexisting ions, while revealing the significant enhancement in mercury ion removal efficiency and adsorption capacity due to the synergistic interaction between STB and MOF-808-SH. Remarkably, under optimal conditions at pH 4.0, STB@MOF-808-SH achieves a removal rate of 91.35% and an impressive adsorption capacity of 228.38 mg/g. These outcomes suggest that the development of the STB@MOF-808-SH composite adsorbent introduces a novel and efficacious approach to tackling water pollution issues, highlighting its potential as a cost-effective and efficient solution for the remediation of toxic Hg(II) ions in wastewater.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）