FUEL
·
2024
·
IF 6.7
Zhongwei Meng,Zhongqiang Bao,Zhao Chen,Bosong Zeng,Zihan Qin,Jie Tan,Ping Pu
The regeneration characteristics of a diesel particulate filter (DPF) are studied on a regeneration test bench, with a focus on the effects of ash and catalyst, including the effects of ZnO and CeO 2 on the regeneration performance and emission characteristics of the DPF. The results indicate that the addition of ZnO and CeO 2 can easily lead to local high temperatures during the regeneration process of the DPF, with the highest peak temperature appearing in a 1:3 ratio for both ZnO and CeO 2 , leading to a significant increase in CO 2 . Compared with ZnO, CeO 2 can advance the DPF rapid regeneration period by about 300 s. When the ratio of PU: CeO 2 is 1:5, the total particulate matter emitted is reduced to the lowest level, but it will significantly increase the emission of nuclear model particles, especially particles below 23 nm. Under the same mixing ratio, an increase in carbon loading can enhance the oxidation ability of ZnO towards carbon black, but the difference between the number of particles emitted during DPF regeneration and regeneration efficiency will gradually decrease.
研究领域:
环境科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Wenbin Hu,Ziwen Chang,Aiping Tang,Yun Wei,Difan Fang,Xiang Lu,Penghui Shao,Hui Shi,Kai Yu,Xubiao Luo,Liming Yang
Supported-adsorbents growing on the substrate in situ are equipped with the advantages of high adsorption capacity, excellent regeneration performance, and adaptability to complex wastewater. However, the effects of substrate on the adsorption properties of supported-adsorbent are rarely considered, which will hinder its development and scale-up applications. In this study, the influences of different substrates (Ti, Mo, W, CC) on the Ag + adsorption behavior of supported-MoS 2 adsorbents were investigated. The adsorption kinetics , adsorption mechanism, and the renewability of these supported-MoS 2 were compared orderly. As a result, MoS 2 grown on a tungsten substrate (MoS 2 –W) exhibits a remarkable adsorption capacity for Ag + (1.98 mg cm −2 and 598.80 mg g −1 ), which is 6.38–33 times more than the other three supported-MoS 2 . Moreover, the MoS 2 –W also possesses an ultrahigh distribution coefficient (24.80 mL cm −2 ) for Ag + , and the selection coefficient can reach 1984. XRD and electrochemical characterization analysis indicated that Ag + adsorption performance of supported-MoS 2 is positively correlated with the degree of its amorphous structure. Substrate W with the terrific electrical properties which may facilitate the disordered growth of MoS 2 , resulting in more active sites exposed, and endow MoS 2 –W with outstanding Ag + capture performance. Finally, the supported-MoS 2 retains a high removal efficiency of Ag + after 5 cycles of adsorption and desorption. This study provides a novel perspective for promoting the practical application of supported-sorbents to recycle heavy metals.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
HYDROMETALLURGY
·
2020
·
IF 3.338
Yong Xiang,Shuaiwei Ding,Xiangmeng Chen,Chunmei Cao,Jingping Sun,Li Xu,Guoji Liu
The design and synthesis of highly active adsorption materials for recycling noble metals are essential to the high-tech industry. Here, a new adsorbent material namely resorcinol-formaldehyde-biuret (RFB) is prepared by grafting biuret onto the phenolic. Compared with the traditional methods, the preparation of RFB herein requires no hydrothermal process, which reduces cost. What's more, RFB prepared without the hydrothermal process exhibits better adsorption performance. Specifically, it has a high adsorption capacity of 1334 mg/g at room temperature and a fast adsorption rate that can adsorb a 10 mL of 100 mg/L gold ion solution within 10 min by just 5 mg RFB. Different factors such as pH, coexisting metal ions , and contact time that affects the adsorption process were systematically investigated. FT-IR, SEM, TEM, and XPS were used to characterize the adsorbent before and after adsorption. It is found that the adsorption isotherm and kinetics of RFB are consistent with the Langmuir isotherm model and the pseudo-second-order kinetic model, respectively. Further regeneration and cyclic adsorption indicate that RFB can be recycled at least four times. Besides, the reduction of 4-nitrophenol to 4-aminophenol was realized with the assist of Au-adsorbed RFB (RFB-Au). The strong soft-soft interaction between N, O atoms and Au atoms gives the material excellent gold ion adsorption capacity and selectivity . Findings herein can broaden the application of nitrogen-rich nanomaterials in gold ion recovery.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Yan-hong Zhang,Fu-qiang Liu,Chang-qing Zhu,Xiao-peng Zhang,Meng-meng Wei,Feng-he Wang,Chen Ling,Ai-min Li
A novel (N,Fe)-dual-functional biosorbent (N/Fe-DB) capable of efficient synergistic removal of Ni(II) and H 2 PO 4 − from aqueous solution was synthesized. The adsorption capacities of Ni(II) and H 2 PO 4 − were both remarkably enhanced over 3 times compared with those in single systems. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed that complexation of amino groups and ligand exchange of hydrous ferric oxide in N/Fe-DB played dominant roles. The electric double layer compressing and chelating ligand of deprotonated H 2 PO 4 − accounted for the enhanced removal of Ni(II) in binary system, while cation bridge interaction promoted uptake of H 2 PO 4 − . Furthermore, the coadsorbates were sequentially recovered, with the ratios of more than 99.0%. Besides, the recovered N/Fe-DB remained stable and applicable to the treatment of real electroplating wastewater even after six adsorption-regeneration cycles. Since the electroplating industry is springing up, effective control of heavy metals and phosphate has attracted global concerns. Based on the enhanced coremoval properties and superb regenerability, N/Fe-DB is potentially applicable to practical production.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jue Wang,Xi Yang,Dongdong Yan,Junyan Wu,Yiguo He,Yadong Zhang
Imprinted resins have attracted much attention for their high contaminant removal and reuse performance. Chloroacetylated polystyrene resins, polyethyleneimine, epichlorohydrin, and Cu(II) were used as support, functional monomer , cross-linker and template, respectively. The ion-imprinted resins (PS-PEI@SIP) and non-imprinted resins (PS-PEI@NIP) were prepared by the combination of amination reactions and surface ion-imprinting technique. The adsorption processes of Cu(II) with PS-PEI@SIP and PS-PEI@NIP followed pseudo-second-order kinetics. The langmuir isothermal adsorption model was consistent with the adsorption curve, indicating that Cu(II) were uniformly adsorbed on the PS-PEI@SIP surface. Thermodynamic experiments showed that the adsorption of Cu(II) by PS-PEI@SIP was a spontaneous process, and high temperature was favorable for adsorption. In addition, the selectivity of PS-PEI@SIP to Cu(II) was confirmed by multi-component competitive adsorption experiments. When Cu(II) mixed with Ni(II), Zn(II) and Cd(II), the selection coefficients of PS-PEI@SIP for Cu(II) were 31.98, 37.19 and 64.27. The results showed that PS-PEI@SIP had high adsorption capacity and good selectivity for Cu(II) ions in mixed ionic solution, and the adsorption capacity was 89.4 mg·g –1 . The simulation wastewater dynamic adsorption experiment showed that the PS-PEI@SIP adsorption column could treat 52.8 BV Cu(II) concentration ( C ＜7.5 mg·g –1 ), when the influent Cu(II) concentration was 150 mg∙L −1 . When 1 mol∙L −1 HCl solution was used for dynamic desorption of PS-PEI@SIP, the desorption rate was more than 92%, indicated that PS-PEI@SIP had good regeneration performance. These results provided basic information for the production of imprinted adsorbent resins.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2015
·
IF 1.173
Ling Li,Li Jun Yuan,Wei Hong,Lu Fan,Le Bao Mao,Li Liu
The adsorptions of methylene blue (MB) and methyl violet (MV) from an aqueous solution of Fe3O4/metal-organic frameworks (MOFs) composite were studied in view of the adsorption isotherm, kinetics and regenerate of the sorbent. The adsorption isotherms of MB and MV on Fe3O4/MOFs composite both followed the Langmuir isotherm. Adsorption kinetics were determined from the experimental data. The used Fe3O4/MOFs could be regenerated by acetonitrile, so it can be recycled for use. The excellent adsorption effect and reusability make Fe3O4/MOFs attractive for the removal of MB and MV from aqueous solution. The feasibility of Fe3O4/MOFs for application in magnetic solid-phase extraction was examined.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Lei Chen,Yu Han,Wei Li,Xiaohui Zhan,He Wang,Chengchao Shi,Yanping Sun,Huixiang Shi
Although ferrihydrite (Fh) exhibits good Sb(V) adsorption behavior, the instability of its amorphous structure limits its engineering applications. In this study, siliceous ferrihydrite (SiFh) was prepared via coprecipitation to resolve these limitations. X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and SiFh aging tests revealed that the growth of Fh particles covered with Fe–O–Si links was inhibited while maintaining their amorphous structure. Meanwhile, the XRD patterns indicated that SiFh maintained excellent stability after five adsorption–desorption cycles. During the aging process, the added Si decreased the electrostatic interaction between SiFh and Sb(V), which weakened the affinity between Sb(V) and Fh; however, most of the Sb(V) still entered the Fe lattice after seven days of aging, which was favorable for Sb(V) recovery during reutilization. Furthermore, Sb(V) adsorbed from the simulated textile wastewater onto SiFh had the highest adsorption energy (E ads ), which meant its unstable inner-sphere complexation on the surface of SiFh. Meanwhile, the presence of SO 4 2− , NO 3 − , Ca 2+ , and Mg 2+ contributed to Sb(V) outer-sphere adsorption. Both of these factors were conducive to Sb(V) desorption. Hence, SiFh is a promising adsorbent owing to its facile preparation process, stability, and optimal regeneration properties.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED ENERGY
·
2019
·
IF 8.426
Chuanwen Zhao,Yafei Guo,Junjie Yan,Jian Sun,Weiling Li,Ping Lu
Co-firing of coal and biomass blends provides a promising route for clean energy utilization with high efficiency and mitigated pollutants emission. However, the technology meets an important challenge in effective utilization of the co-firing fly ashes. Efforts have been made to valorize the co-firing fly ash residues as potential CO 2 sorbents. To achieve enhanced CO 2 sorption performance, the samples were modified with tetraethylenepentamine (TEPA). Effects of amine loading, CO 2 sorption temperature, initial CO 2 concentration and gas flow rate on CO 2 sorption behaviors of the amine-tethered sorbents were investigated. The desired sorbent with 25% TEPA loading presented the highest CO 2 sorption capacity of 1.19 mmol CO 2 /g when tested under 60 °C and 15%CO 2 with a total gas flow rate of 1200 ml min −1 . The effects of regeneration temperature and ramping rate on sorbent regeneration performance were demonstrated. The maximum sorbent regeneration efficiency of 97.2% was achieved under the regeneration condition of 110 °C and 5 °C min −1 . CO 2 sorption capacity of the amine-tethered sorbent kept stable within 5 repeated cycles. These findings indicate that the amine-tethered sorbent could be a good candidate for on-site CO 2 capture from flue gas in co-firing power plants.
研究领域:
能源与环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Yangyu Liu,Chunquan Li,Arman Peyravi,Zhiming Sun,Guangxin Zhang,Keivan Rahmani,Shuilin Zheng,Zaher Hashisho
Mesoporous silica MCM-41 was synthesized by a facile hydrothermal treatment using sodium silicate extracted from natural Opoka as the Si source. The dynamic adsorption and desorption of organic vapors mixture on the MCM-41 were investigated. Characterization of the textural properties of the samples showed that the sample synthesized with a molar ratio of CTAB/Si = 0.16 possessed the largest specific surface area (988 m 2 /g) and pore volume (1.02 cm 3 /g), also uniform pore size distribution centered at 2.8 nm. The adsorption capacity of this sample for organic vapors mixture improved remarkably over raw Opoka and reached 158.5 mg/g at 20 ℃, which is comparable to that of commercial activated carbon. The reusability of the adsorbent was tested by 5 adsorption and regeneration cycles. Obtained results demonstrate that the MCM-41 adsorbent can be easily regenerated by thermal desorption in air, and the cumulative heel on the adsorbent can be markedly reduced by increasing the desorption temperature, making it a promising adsorbent for VOCs abatement.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2014
·Vol. 49
·期 9
·3391-3399
·
IF 2.305
Jie Zhiqiang,Zhang Bing,Zhao Lianhong,Yan Xiufang,Liang Jie
A novel regenerable antimicrobial silica gel was prepared by a dehydration between silanols of silica gel and hydrolyzed 3-chloropropyltrimethoxysilane, a quaternization between grafted hydrolyzed 3-chloropropyltrimethoxysilane and (5,5-dimethylhydantoinyl-3-ylethyl)-dimethylamine (DHEDA), and a chlorination of amide groups of DHEDA. The as-prepared antimicrobial silica gel was characterized by FT-IR and X-ray photoelectron spectroscopy. Antimicrobial tests showed that the as-prepared antimicrobial silica gel was capable of about a 6-log inactivation of Staphylococcus aureus and Escherichia coli O157:H7 within 10 min of contact. Interestingly, more than 2 × 10 4 CFU/mL of Escherichia coli O157:H7 could be almost inactivated under flowing water condition. Furthermore, the as-prepared antimicrobial silica gel exhibits good regenerability and storage stability.
研究领域:
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 101
·82916-82923
·
IF 3.84
Yingying Zhu,Jianxin Zou,Xiaoqin Zeng
In the present work, two LiBH4 based hydrogen storage composites, namely, 3LiBH4/graphene and 3LiBH4/graphene–10 wt% CeF3, were prepared through ball milling and their hydrogen sorption behaviors were investigated. It was shown that the dehydrogenation kinetics of 3LiBH4/graphene was improved by doping 10 wt% CeF3, which was attributed to the formation of CeB6. The rehydrogenation of the 3LiBH4/graphene composite could be achieved under 440 °C with 3.3 MPa hydrogen pressure and the hydrogen absorption capacity reached 7.40 wt% to LiBH4 after 10 h. Further addition of CeF3 did not improve the rehydrogenation kinetics but reduced the absorption capacity. SEM observations suggested that LiBH4 was confined in a graphene wrapper after rehydrogenation, forming “graphene capsules” that helped the regeneration of LiBH4.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Kanagaraj Rajalakshmi,Selvaraj Muthusamy,Meng Xie,Yun-Sik Nam,Byeong-hyeon Lee,Kang-Bong Lee,Yuanguo Xu,Jimin Xie
The accumulation of mercury in the food chain and environment is harmful to living beings. This raises the need for high affinity, reusable cost-efficient adsorbents for mercury. Herein, we report a side chain entanglement free hetero atom effect bearing covalent organic framework MTF prepared by integrating melamine and thiophene linker. The AA stacked MTF-2 was prepared via transformation strategy from its AB stacked MTF-1 congener. The MTF-1 and MTF-2 were comprehensively analyzed through PXRD, SEM, TEM, 13 C CP/MAS, N 2 sorption and mercury removal efficiency. The adsorption capacity of MTF-2 revealed a value of 540 mg g −1 , which is greater than that of MTF-1 (328 mg g −1 ). The adsorption mechanism was studied through XPS, 13 C CP/MAS and XAFS indicating probable coordination of Hg 2+ with both the triazine and sulfur moieties in a cooperative manner. To demonstrate the role of aromatic triazine ring, the analogous aliphatic triaminoguanidine was selected and the removal efficiencies between triaminoguanidine-thiophene COF (TAG-TF) and MTF-2 were compared. It revealed that the triazine unit containing MTF-2 showed 2.2 times greater removal efficiency than TAG-TF. The results reveal the structure-performance relationship, where the high surface area and relatively ordered functional moieties both paly a synergistic role in efficient mercury adsorption.
研究领域:
环境科学
·
材料科学
✓ 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）