FUEL PROCESSING TECHNOLOGY
·
2023
·
IF 7.5
Di Xie,Jingchun Huang,Zhenqi Wang,Wei Hu,Che Liu,Dapeng Wang,Xian Li,Yu Qiao
Herein, rice, cabbage, and pork were chosen as typical starch, lignocellulose, and protein food wastes, respectively. Hydrothermal carbonization and KOH activation were used to prepared activated carbon from single and mixed food wastes, with a focus on the effect of components on the electrochemical performance of activation carbon as EDLC electrode materials . The results showed that the mesoporous and carbonyl group in activated carbon were mainly contributed by the starch in feedstocks, while the micropores , pyrrolic-N, and edge defects in activated carbon were determined by the lignocellulose and protein in feedstocks. Compared with single components, the mixed food wastes were more suitable to produce activated carbon with high specific capacitance. Among them, the three-component mixture presented the highest specific capacitance of 327 F/g at 0.5 A/g. However, the activated carbon from the rice owed high capacitance retention rate of 83.7%. In general, the co-presence of lignocellulose and protein in food wastes were conducive to the enhancement of specific capacitance for activated carbon. The starch rich food waste was feasible to produce activated carbon with well capacitance retention rate. The results could give a guide to select suitable food wastes that could produce high efficiency electrode materials .
研究领域:
材料科学
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环境科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Maofeng Shi,Lei Song,Yihong Wu,Chuhan Gu,Jiaxian Zhang,Jingyu Lv
Pyrene (PYR) is a typical high molecular weight polycyclic aromatic hydrocarbon (HMW-PAH) with potential biotoxicity and resistance to biodegradation, and the accumulation of PYR in sediments increases the risk to ecosystems. Therefore, this study evaluated the catalytic performance of nitrogen-doped magnetic biochar-activated peroxymonosulfate system (NMBC/PMS) on PYR in sediments and elucidated its mechanism. The results showed that the degradation rate of PYR in sediments by the NMBC/PMS system reached 87% at PMS= 1 × 10 −4 M, NMBC= 3.0 g/L and pH= 9, which conformed to the pseudo-first-order rate law, and the rate constant(K obs ) was 7.3 × 10 −2 h −1 . The high adsorption performance of NMBC was attributed to π-π electron donor-acceptor interactions (π-π EDA). The high degradation performance of NMBC/PMS system was attributed to the active sites generated by graphitization , magnetism, and electronegativity of NMBC, which were the key to activate PMS to degrade PYR. The results of X-ray photoelectron spectroscopy (XPS), quenching experiments and electron paramagnetic resonance (EPR) analysis indicated that N-doping and Fe 3 O 4 -loading on NMBC synergistically promoted the degradation of PYR. In addition, the mechanism of PYR degradation by NMBC/PMS system was investigated, indicating that SO 4 · - , HO·and 1 O 2 were the main reactive oxygen species . The excellent recoverability of NMBC showed its application potential. The NMBC/PMS system developed in this study provided a theoretical basis for a future multi-pathway synergistic degradation mechanism of PYR in sediments.
研究领域:
环境科学
·
污染治理
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 4
·2127-2136
·
IF 3.108
Mengwei Li,Zhendong Zhao,Xiaodan Wu,Wenjun Zhou,Lizhong Zhu
In recent years, biochar has been well-documented in the literature as a promising soil amendment for the sorption and immobilization of organic contaminants in contaminated soils via its organic functional groups. In this study, original and demineralized cow manure biochars were applied with the aim to evaluate the impact of their mineral component on adsorption and competitive adsorption of oxytetracycline and carbaryl. Adsorption increased greatly for oxytetracycline but decreased slightly for carbaryl after demineralization. Mineral components significantly enhanced overall adsorption of carbaryl but slightly inhibited that of oxytetracycline to biochars, because the dominant sorption mechanisms of oxytetracycline and carbaryl on demineralized biochars were established as pore-filling effects and specific-site sorption, respectively. Competitive adsorption was observed in the binary-solute sorption system, where oxytetracycline outcompeted carbaryl on original biochars, however, carbaryl showed a greater competitive adsorption to oxytetracycline on demineralized biochars. Furthermore, demineralization treatment weakened the competition strength of oxytetracycline to carbaryl but enhanced that of carbaryl to oxytetracycline. This work demonstrated that the demineralization treatment altered the physicochemical properties of biochars and the dominant sorption mechanisms of oxytetracycline and carbaryl, leading to their different changes on competition strength. The results are useful for the application of biochars in the remediation of combined pollution in agricultural soils.
研究领域:
环境科学
·
土壤修复
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DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2016
·
IF 0
Mi Mi Chen,Meng Meng Zhang,Feng Qing Zhao
A clean and safe process of utilizing waste penicillin mycelium (WPM) was proposed in this paper. We treated WPM by soaking it in aqueous alkaline solution, to produce retarders for hemihydrate gypsum (the protein hydrolysate) by filtration. The filter cake was used to produce activated carbon, while the waste water can be reused for soaking process. This retarder can effectively prolong the setting time of gypsum with less drop in mechanical strength of gypsum plaster. The activated carbon produced with 674 mg/g of Iodine value, which meets the requirements of general industrial applications.
研究领域:
生物工程
·
材料科学
·
环境科学
✓ 已验证
DOI
POLYMER DEGRADATION AND STABILITY
·
2021
·
IF 5.03
Youlin Qin,Mingchao Li,Tuankang Huang,Chunhui Shen,Shanjun Gao
In this paper, a star-shaped char forming agent BTETP containing phosphorus and nitrogen is synthesized and characterized in the paper. It is compounded with ammonium polyphosphate (APP) to form an intumescent flame-retardant system. The stable star-shaped structure is constructed, and the insulating char layer is formed on the surface of the polymer matrix by the synergistic effect between phosphorus and nitrogen, thus, the high-performance flame retardant PP is obtained. Its flame retardancy and thermal stability are studied by limiting oxygen index (LOI), vertical combustion test (UL-94), cone calorimetry (CCT), and thermogravimetric analysis (TGA). With only a 20 wt% addition of BTETP/APP (1:2), the PP composite can reach the UL-94 v-0 level, while the peak heat release rate (PHRR), total heat release rate (THR), and average mass loss rate (AV-MLR) are significantly reduced compared with pure PP, showing higher fire safety. Moreover, the residue at 800 °C can reach as high as 9%, indicating that the loading of BTETP/APP is conducive to promoting carbonization of the degradation products of PP to generate more char. In addition, the synergistic effect and the flame retardant mechanism are studied and discussed. This study provides a program for the synthesis of flame retardants with a high-performance and effectively avoids the problem existing in traditional flame retarding approaches.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2021
·Vol. 22
·期 8
·2119-2126
·
IF 2.153
Yang Huiyu,Xu Jie,Zhai Lisha,Liu Xin,Deng Bo,Xu Weilin
Polypyrrole (PPy) was deposited onto carbon fiber felt (CFF) by in-situ polymerization to prepare CFF/PPy composite textile as free-standing and flexible electrode for supercapacitor. Electrochemical performance was characterized by cyclic voltammetry (CV), electrochemical impedance (EIS) and constant current charge-discharge technology. The results show that the doping of organic sulfonic acid further improved the electrochemical performance of electrode materials. Areal capacitance, energy density and power density of the CFF/PPy/TsOH are as high as 5943 mF·cm −2 , 1739 µWh·cm −2 , 1450 µW·cm −2 , respectively (at a current density of 0.8 mA·cm −2 ). Overall, this flexible textile electrode is promising to be used as wearable electronic device.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2022
·
IF 7.926
Jingxin Liu,Hang Jia,Meng Mei,Teng Wang,Si Chen,Jinping Li
Diclofenac (DCF), a widely used drug, is frequently found in natural waters, and its removal has caused extensive concern. Sulfate radical-based advanced oxidation processes are efficient for the degradation of organic pollutants , but the self-decomposition of persulfates is always sluggish and restricted. Herein, self-N doped biochar derived from food waste digestate (FWDB) was evaluated as the activator of peroxylmonosulfate (PMS) in terms of DCF degradation. The effects of several key operating variables were examined, and the results indicated that ∼93% of DCF with an initial concentration of 20 mg/L was removed at FWDB dosage of 0.3 g/L and PMS concentration of 1.0 mM. Thereafter, the machine learning method was explored to simulate and predict the DCF removal process. The reactive oxygen species participated in the reaction was identified as 1 O 2 , and the reaction sites on FWDB were determined as graphitized carbon, C O structure, doped-N, and defective edges. Moreover, based on the identification of intermediates and products, the possible DCF destruction pathways were proposed as hydroxylation , cleavage of N−C bond, and decarboxylation . This study provided an economical and convenient heterogeneous PMS activator for remediation of organic wastewater and confirmed the feasibility of optimizing the contaminant degradation process via data mining .
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Huijuan Zhu,Yibing Xie
The bridge molecule-reinforced activated carbon fiber-m-aminobenzenesulfonic acid-polyaniline (ACF-mABSA-PANI) is designed and fabricated as braidable-supercapacitor electrode to achieve long cycle life and high capacitive performance. The mABSA acts as bridge molecule to form amide bond between mABSA and ACF, as well as sulfonamide bond between mABSA and PANI, which is confirmed by infrared spectrometer and X-ray photoelectron spectroscopy. The interfacial interaction between ACF and PANI is enhanced by chemical bonding, thus alleviating the shedding of polyaniline and improving the cycle life of ACF-mABSA-PANI. The electrostatic potential and Mulliken charge analysis calculations indicate that ACF-mABSA-PANI has an extended delocalized π-π conjugation system. The bridge molecule of mABSA improves the free electron migration efficiency between PANI and ACF, leading to an increase in the specific capacitance of ACF-mABSA-PANI. As a result, ACF-mABSA-PANI presents much higher specific capacitance of 599.3F/g at 0.5 A/g and much higher capacitance retention ratio of 93.8 % after 2000 charge/discharge cycles at 2 A/g while ACF-PANI only keeps 335.0F/g and 54.4 %. Braidable-supercapacitor based on ACF-mABSA-PANI electrode provides an energy density of 39.83 Wh kg −1 at a power density of 900 W kg −1 and maintains a high capacitance retention of 78.1 % after 2000 charge/discharge cycles at 2 A/g. Well-designed ACF-mABSA-PANI presents the potential and promising application for wearable electrochemical energy storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Qian He,Yuxiu Yu,Jie Wang,Xidong Suo,Yaodong Liu
In order to systematically understand the hydrothermal carbonization reactions and kinetics of glucose at 180 °C, the structures of intermediate and final chemical products were identified, the conversion paths were clarified, and the conversion rates and yields were calculated. By comparing the hydrothermal reaction paths and kinetics of 5-hydroxymethylfurfural (HMF), fructose, and glucose, it is proven that HMF is the most important intermediate and the sole precursor of hydrothermal carbon. The degradation of glucose, fructose, and HMF follows the first-order reaction, and the formation of hydrothermal carbon linearly depends on the conversion of HMF. Approximately 28% of HMF is converted from fructose and ∼72% is from glucose. Also, the hydrothermal reaction time-dependent morphologies and structures of the resulting hydrothermal carbon are compared, and their structures before and after heat treatment are characterized.
研究领域:
化学工程
·
能源科学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Chen Chen,Lu-Lu Zhou,Yu-Nuo Huang,Wei-Kang Wang,Juan Xu
Biochar has been developed to activate persulfate for wastewater treatment due to its carbon essence, easily-available and low-cost. Efficiently active sites and interfacial electron transfer are highly desired for peroxydisulfate (PDS) activation. In this study, boronic ester structure and defect degree of boron-doped biochar are confirmed as activate sites to improve PDS activation. The performance of pollutants degradation is proven to have structure-activity relationships with both activate sites. Moreover, boron-doped biochar exhibits higher stability and oxidation potential by forming the surface-confined complex, promoting electron transfer from pollutants to complex. The optimized boron-doped biochar has the advantages of adapting to a broad pH range (2.9–10.0), strong resistance to Cl − and organic matters, a low activation energy of 11.22 kJ mol −1 , and achieving the decomposition of practical dyeing wastewater. Our work provides a promising approach to regulating the interfacial catalytic sites of biochar by doping heteroatom for PDS activation in practical wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2019
·Vol. 19
·期 7
·3879-3886
·
IF 1.093
Liu Baoliang,Yang Bing,Sun Meiyu,Qian Xiangli,Zhang Qikun
In this study, a Pt loaded active carbon fiber (Pt/ACF) catalyst was prepared by immobilizing Pt nanoparticles on ACF. The catalyst accelerated hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline (p-CA) at lower temperature and atmospheric pressure,
resulting in approximately 100% yield and selectivity. Several factors that affect p-CA yield were investigated. The nitro reduction rate reached 100% under the optimal reaction conditions, indicating excellent selectivity of the prepared catalyst. This process will overcome the environmental
pollution problems associated with the traditional process, and is a green synthetic process.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2023
·Vol. 98
·期 9
·2224-2234
·
IF 3.4
Hao Fu,Yongwen Ma,Jinquan Wan,Yan Wang,Yingping Long,Jianye Cao
BACKGROUND Most studies have focused on the degradation of acrylamide (AM) by a single strain. There are relatively few studies on the treatment of AM by anaerobic activated sludge. Previous studies have shown that conductive particles can change the mode of electron transport between anaerobic microorganisms. Therefore, this study compared the enhancement effect of three different particles (Fe 3 O 4 , granular activated carbon (GAC), graphite) on the treatment of synthetic AM wastewater by anaerobic activated sludge under different temperature conditions (30, 25, 20 °C) and particle dose (2, 6 g L −1 ). RESULTS The results showed that 6 g L −1 GAC improved the removal rate of chemical oxygen demand (COD) and AM by 22.95% and 19% compared with the control group at 30 °C, respectively, indicating that the addition of GAC contributes to the degradation of AM and improves COD removal rate. Results of high-performance liquid chromatography (HPLC) showed that the activated sludge with GAC obviously promoted the degradation of AM. Besides, a large amount of propionic acid was detected in all experimental groups during the reaction, and the activated sludge with GAC promoted degradation of propionic acid. CONCLUSION Anaerobic activated sludge supplemented with sufficient GAC can not only absorb and degrade AM synchronously but also accelerate the conversion of intermediates, such as acrylic and propionic acids. Based on the results of HPLC and liquid chromatography–mass spectrometry, a possible method of degradation of AM by anaerobic activated sludge was proposed. © 2023 Society of Chemical Industry (SCI).
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）