JOURNAL OF BIOTECHNOLOGY
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2017
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IF 2.599
Chun-Xia Jiang,Yu-Cai He,Gang-Gang Chong,Jun-Hua Di,Ya-Jie Tang,Cui-Luan Ma
Sugarcane bagasse (SCB) is an abundant, renewable and inexpensive agricultural byproduct for the production of biofuel and other biobased products. To effectively saccharify SCB with cellulases, combination with dilute alkali salts Na 2 SO 3 /Na 3 PO 4 (0.4% Na 3 PO 4 , 0.03% Na 2 SO 3 ) at 7.5% sulfidity and hot water (DASHW) in “one-pot” pretreatment media by autoclaving at 110 °C for 40 min was attempted to pretreat SCB in this study. Furthermore, FT-IR, XRD and SEM were employed to characterize the changes in the cellulose structural characteristics (porosity, morphology, and crystallinity) of the pretreated Na 2 SO 3 /Na 3 PO 4 -SCB solid residue, which indicated that combination pretreatment could effectively remove lignin and hemicellulose for enhancing enzymatic saccharification. After 72 h, the reducing sugars and glucose from the enzymatic in situ hydrolysis of 50 g/L Na 2 SO 3 /Na 3 PO 4 -SCB in dilute Na 2 SO 3 /Na 3 PO 4 (0.27% Na 3 PO 4 , 0.02% Na 2 SO 3 ) media were obtained at 33.8 and 21.8 g/L, respectively. Finally, the SCB-hydrolysates containing 20 g/L glucose were used for ethanol fermentation in the presence of dilute alkali salts. After 48 h, the ethanol yield was 0.42 g ethanol/g glucose, which represents 82.1% of the theoretical yield. In conclusion, this study provided an effective pretreatment strategy for enhancing SCB’s saccharification, which has potential application of other lignocellulosic materials.
研究领域:
生物工程
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可再生能源
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PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 47
·71721-71730
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IF 5.19
Huang Wenjun,Li Sichao,Wang Hongbin,Cui Peng,Xu Haomiao,Cheng Can,Qu Zan,Yan Naiqiang
Oxidation–reduction-absorption based on sulfite is a promising process for simultaneous removal of NO x and SO 2 . However, excessive oxidation of sulfite and competitive absorption between NO x and SO 2 limit its application. A matching strategy between antioxidants and alkaline agents has been proposed to solve these problems and enhance the absorption process. The comparison results of inhibitors showed that hydroquinone exhibited long-term high-efficiency inhibition of S(IV) (SO 3 2- /HSO 3 - ) oxidation. The comparison of alkaline agents showed that the Na 2 SO 3 solution with heterogeneous mixture of MgO and hydroquinone exhibited better absorption performance than that with other combinations. The absorption amounts of NO x in 0.15 mol/L Na 2 SO 3 50 mL solution added 0.1% hydroquinone (HQ) with 0.09 mol/L MgO were 2.24 mmol, which improved 5 times than that without additives. In addition, studies on the influence of pH showed that the pH of MgO mixture could be stabilized at 9–10 for a long time, while the pH of Na 2 CO 3 mixture decreased faster. Further studies suggested that the hydration of MgO resulted in the solution with MgO keeping high pH. This is also the main reason why the combination of MgO and hydroquinone is superior to the combination of Na 2 CO 3 and hydroquinone in desulfurization and denitration performance.
研究领域:
环境科学
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化学工程
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PubMed
高影响因子
Journal of Water Process Engineering
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2024
·
IF 6.3
Yanan Liu,Guangyan Wang,Shuaishuai Lu,Siqi Wang,Peijuan Jiang,Huan Chen,Fang Jiang
Pollution caused by per - and polyfluoroalkyl substances (PFASs) has raised global health concerns and there is an urgent need for researchers to find effective treatment methods. The covalent triazine framework (CTF) adsorbent materials with different structures based on various precursors using the ionothermal method were prepared and characterized in this study. Among them, F-doped CTF (F-CTF) is favorable for effective mass transfer in the adsorption process due to its rich microporous structure and large specific surface area. The maximum adsorption capacity (q max ) for PFOA reached 769.2 mg/g under the synergistic effect of electrostatic force and the interaction of F F. After six cycles of adsorption-desorption experiments, the adsorption and desorption rates of the F-CTF 400°C were stable at >90 %. This result indicates that F-CTF 400°C possesses high stability and recyclability. Furthermore, the desorption solution containing a high concentration of PFOA was treated directly by a UV/Na 2 SO 3 system, utilizing the e aq − within the system to decompose PFOA. The reduction and defluorination efficiencies for the desorption solution with high concentrations of PFOA reached 90 % and 40 %, respectively. The study results indicate that by leveraging the high adsorption selectivity and stable recoverability of F-CTF 400°C , the UV/Na 2 SO 3 system can completely remove PFOA. This approach offers a novel solution for the elimination of PFOA pollution in the environment.
研究领域:
环境科学
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材料科学
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化学工程
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高影响因子
Environmental Progress & Sustainable Energy
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2025
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IF 2.3
Zhengxiong Jiang,Zhitao Han
With the aim to develop wet denitration process for marine application, it is still challenging to simultaneously achieve high-efficiency NO x removal from flue gas and low nitrate concentration in scrubbed solution. Herein a novel two-step method was proposed to solve this issue: phosphate buffer solution (PBS) with organic additive was used to absorb NO x efficiently from flue gas, and in next step, Na 2 SO 3 as a reductant was added in the scrubbed solution to reduce NO x off-line. Five typical organic additives were chosen to compose with PBS. The tetrabutylammonium bromide and phosphate buffer solution (TBAB/PBS) composite solution exhibited superior NO x absorption performance. Furthermore, the effects of TBAB concentration, NO x oxidation degree, solution pH, temperature and O 2 concentration on NO x absorption performance of TBAB/PBS composite solution were investigated systematically, and a high NO x absorption efficiency of >90% could be achieved. It was mainly attributed to a physical complex between PBS and NO 2 , N O 3 − $$ N{O}_3^{-} $$ , N O 2 − $$ N{O}_2^{-} $$ , together with a mass transfer enhancement by TBAB. A long-run test showed that nitrate concentration was much lower than the limit value of IMO. Cyclic absorption and regeneration tests confirmed that Na 2 SO 3 could effectively regenerate the scrubbed solution in the absence of O 2 .
研究领域:
环境科学
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化学工程
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高影响因子
ENERGY & FUELS
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2020
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IF 3.421
Zhao Zhang,Song Zhou,Hongyuan Xi,Majed Shreka
A high nitrate concentration in scrubber water is a major factor that restricts ship applications of NOx wet absorption technology. In this paper, an absorption system (Na2SO3/NaHSO3) that can effectively improve NO2 absorption and reduce the concentrations of nitrate and nitrite was studied. Several factors that affect the NOx absorption efficiency and the concentrations of nitrate and nitrite were investigated in a bubble reactor by using Na2SO3 and Na2SO3/NaHSO3. In addition, the reaction mechanism for the process of NO2 absorption was deduced. The results illustrate that increases in S(IV) concentration and initial NO2 concentration could enhance the NOx absorption efficiency while increases in the NO/NO2 ratio and SO2 concentration decreased the NOx absorption efficiency. Moreover, the maximum NOx absorption efficiency was 97.8% at 0.15 mol/L S(IV) and 1400 ppm of NO2 when using the Na2SO3/NaHSO3 absorption system. The S(IV) concentration was the main factor affecting the NOx absorption efficiency and the concentrations of nitrate and nitrite. Increasing the SO2 concentration slightly affected the NOx absorption efficiency but was beneficial for decreasing the concentrations of nitrate and nitrite. The performance of the Na2SO3/NaHSO3 absorption system was better than that of Na2SO3 in the presence of oxygen. Furthermore, the minimum concentrations of nitrate and nitrite were 13.5 and 0 mg/L, respectively, in the Na2SO3/NaHSO3 absorption system for 1100 ppm of NO2 and 0.3 mol/L S(IV) and were much lower than current regulations for scrubber water. Finally, compared with other experimental results, the Na2SO3/NaHSO3 absorption system exhibits great potential for ship NOx wet absorption, and the addition of NaHSO3 plays a key role in decreasing the concentrations of nitrate and nitrite.
研究领域:
环境科学
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化学工程
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高影响因子
Environmental Progress & Sustainable Energy
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2022
·Vol. 42
·期 2
·e13998
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IF 2.824
Gang Liu,Zhitao Han,Jiawei Li,Zhen Wang,Shaosi Cheng,Yubin Liu,Jing Yu,Xinxiang Pan
Since it is difficult to deal with high-concentration nitrates in scrubbed wastewater onboard vessels, the application of traditional wet denitration technology is limited to some extent. Here a novel method for removing pre-oxidized NO x by using Na 2 SO 3 /THS composite solution is proposed with the aim to obtain high NO x absorption efficiency and low nitrate concentration in scrubbed wastewater simultaneously. The effects of Na 2 SO 3 concentration, THS concentration, NO x oxidation degree, coexistence of SO 2 and O 2 in flue gas, initial pH value and temperature of absorption solution on denitration performance were discussed in detail. The results showed Na 2 SO 3 could reduce NO x to nitrate, nitrite, and N 2 . The addition of THS could promote NO x absorption greatly by forming complexes with SO 3 2− . When initial NO x concentration was 1000 ppm with a NO x oxidation degree of 50%, O 2 concentration was 8%, Na 2 SO 3 and THS concentrations were 25 and 20 mmol/L, a NO x absorption efficiency of 87% could be achieved, while nitrate and nitrite concentrations were 32.97 and 14.19 mg/L, respectively.
研究领域:
环境工程
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海洋工程
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化学工程
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高影响因子
RSC Advances
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2016
·Vol. 6
·期 89
·86602-86606
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IF 3.289
Zhen Lin,Namei Wu,Wensong Yao,Jinyuan Chen,Shaoguang Li,Ailin Liu,Xinhua Lin
Chemiluminescence (CL) happened in chemical reactions, in which electronically excited intermediates or products were obtained and subsequently released energy with emission of light. CL is a useful approach to investigate active radicals involved in one system. In the present work, we first found SiC·SiOx, a new kind of zero-dimensional silicon-based nanomaterial, owned CL properties in the presence of Ce(IV)–Na2SO3. The CL mechanism was further investigated by the CL, ultraviolet-visible light (UV-vis), and electron spin resonance (ESR) spectra. Mechanistic investigation indicated SiC·SiOx increased the generation of singlet oxygen in the Ce(IV)–Na2SO3 system and excited SiC·SiOx could be produced from the combination of hole and electron injected SiC·SiOx. This opens up an avenue for investigating the CL properties of SiC·SiOx and promotes their application in various fields.
研究领域:
材料科学
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化学
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DOI
高影响因子
Sustainable Chemistry and Pharmacy
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2023
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IF 6
Ying Han,Zihao Ma,Xing Wang,Yuanyuan Sheng,Yu Liu
Natural polyphenol antioxidants have excellent antioxidant activity and degradability which are considered as one of the possible alternatives to chemical synthetic antioxidants. Here, lignin-based polyphenols were prepared from poplar lignin, pine lignin and rice husk lignin by demethylation, and no toxic reagents were used in the preparation process. The phenolic hydroxyl groups of all three lignin were increased and the methoxyl content was significantly reduced after the demethylation without degradation or structural changes in the lignin as shown by GPC and 2D HSQC analyses. Furthermore, the antioxidant activity of the modified lignin was significantly increased. In this paper, a green and efficient strategy was developed to prepare lignin-based polyphenols with high phenolic hydroxyl content, low molecular weight , strong antioxidant activity and low cytotoxicity, which have a promising future in the field of antioxidant applications.
研究领域:
化学工程
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材料科学
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环境科学
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高影响因子
GREEN CHEMISTRY
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2023
·Vol. 25
·期 23
·9795-9804
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IF 9.8
Jie Ren,Zhewen Zhang,Zikang Chen,Li Wan,Kaixiang Shi,Xiaoyuan Zeng,Junhao Li,Quanbing Liu
In the field of new-energy systems, the use of spent lithium-ion batteries is being rationalized as a prospective industry. However, with the progress of technology, the exploration of strategies that are efficient, green, and energy-saving has become the major issue for recycling batteries. Recently, the mechanochemical activation (MCA) process has been proposed as a method for reducing leaching time and temperature, further tackling the excessive usage of corrosive chemical agents in hydrometallurgical techniques. Herein, we present a co-grinding agent of spent LiCoO2 (S-LCO) and Na2SO3 (reduction properties) to facilitate the physical and chemical transformations of the S-LCO, thereby enhancing the leaching process. MCA can refine particle size, enhance its hydrophilicity, induce lattice distortion and refine lattice structure, and thereby the surface energy and surface negative charge are increased, further improving the reaction activity of S-LCO. Meanwhile, Na2SO3 promotes the isomorphic substitution between Na+ and Li+ and reduces Co3+ to Co2+. Because of this superiority, this novel MCA shortens leaching time and reduces leaching temperature, as well as improves leaching efficiency and reduces the use of acidic solvents. Practically, the cell with regenerated LiCoO2 exhibits excellent cycling performance and rate capability (a high capacity retention of 84.54% after 120 cycles at 0.2 C), which sheds some light on the interface process engineering of a co-grinding agent for recycling spent lithium-ion batteries.
研究领域:
材料科学
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环境工程
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高影响因子
CHEMOSPHERE
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2023
·
IF 8.8
Le Zhang,Yong Liu,Jianlong Wang
The oxidation of ammonium (NH 4 + ) to dinitrogen (N 2 ) with high selectivity and high efficiency is still a challenge. Herein, a novel sunlight induced persulfate (PS)-based AOPs process (MgO/Na 2 SO 3 /PS/ hv ) was proposed by introducing solid base (MgO) and hydrated electron (e aq − ), to selectively oxidize NH 4 + to N 2 , with high selectivity and high efficiency at a wide range of pH value. The deprotonation of NH 4 + into NH 3 by MgO and the generation of •OH and SO 4 −• by PS activation were responsible for the high efficiency of NH 4 + oxidation. The buffering capacity provided by MgO to proton released from PS activation made the NH 4 + oxidation possible at a wide pH range. The e aq − from the Na 2 SO 3 / hv process was the main active specie to reduce NO 2 − and NO 3 − (NO x − ) into N 2 , responsible for high N 2 selectivity of NH 4 + oxidation. 100% NH 4 + could be oxidized within 30 min, and N 2 selectivity exceeded 96% at the initial pH range of 3–11 and the initial concentration of NH 4 + of 30 mg N/L. This work could offer an efficient AOPs process for selective NH 4 + oxidation, which is promising for the chemical denitrification of wastewater ….
研究领域:
环境科学
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化学工程
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Pengli Bai,Huimin Fang,Weiguo Wang,Enzhou Liu
Treating H 2 S in a NaOH/Na 2 SO 3 solution simultaneously transforms it into H 2 /Na 2 S 2 O 3 . • Precise control of the Se/S atomic ratio in CdS 1− x Se x solid solutions enables continuous bandgap tuning. • The construction of a NiS 2 /CdS 0.90 Se 0.10 Schottky heterojunction enhances interfacial charge separation efficiency. • Investigation of the compositional evolution of CdS 0.90 Se 0.10 under varying alkaline conditions and its intrinsic mechanism underlying enhanced hydrogen evolution activity. Photocatalytic conversion of toxic hydrogen sulfide (H 2 S) waste gas into high-purity hydrogen (H 2 ) and value-added sulfur-containing chemicals has emerged as a transformative technological solution for enhancing sustainability in the coal chemical and petrochemical sectors. In this study, a selenium (Se) doping strategy was employed to synthesize CdS 1- x Se x solid solution photocatalysts, enabling precise band-gap modulation to alleviate rapid charge recombination and photo-corrosion of CdS. At an optimized Se content of x = 0.10, the resulting material exhibits a more negative conduction band minimum, thereby enhancing the thermodynamic driving force for H 2 evolution. Subsequently, a Schottky junction was constructed by depositing NiS 2 cocatalyst onto the surface of CdS 0.90 Se 0.10 (CSS). The 2 wt % NiS 2 /CSS composite delivered a H 2 evolution rate of 3.5 mmol g −1 h −1 in an H 2 S-saturated solution (0.2 M NaOH, 0.6 M Na 2 SO 3 ), corresponding to a 2.9-fold enhancement over pristine CSS. Electrochemical characterization showed that incorporation of the NiS 2 cocatalyst reduced the charge-transfer resistance and H 2 evolution overpotential, and increased the electrochemically active surface area. Fourier transform infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, and thiosulfate (S 2 O 3 2− ) titration confirmed the concurrent conversion of H 2 S to S 2 O 3 2− . Moreover, the alkaline reaction medium contributed to improved catalyst stability. This synergistic strategy addresses the twin challenges of chalcogenide photocorrosion and decomposition of waste H 2 S, thereby providing experimental evidence for the valorization of sulfur-containing wastes and H 2 production. This study reports a CdS 1- x Se x /NiS 2 photocatalytic system that achieves efficient, alkaline-mediated conversion of toxic H 2 S into high-purity H 2 and S 2 O 3 2− , while simultaneously suppressing photocorrosion and enhancing charge separation. It establishes a robust, sulfur-centered strategy for H 2 S valorization. Download: Download high-res image (310KB) Download: Download full-size image
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2019
·
IF 4.978
Fekadu Tadesse Bekena,Hairus Abdullah,Dong-Hau Kuo,Misganaw Alemu Zeleke
Novel Mg-doped Zn(O,S) nanoparticles were synthesized by a chemical precipitation process at 90 ℃ and the prepared nanoparticles were characterized by XRD, SEM, HRTEM, XPS, UV–vis, DRS, PL, EIS, and photocurrent response. The photocatalytic reduction for the 4-nitrophenol using Na 2 SO 3 under UV light irradiation showed that Mg–Zn(O,S)-2.5 exhibited higher activity compared with other samples. 96.7% of 4-nitrophenolate ion reduced into 4-aminophenol within 45 min. Mg–Zn(O,S)-2.5 was also tested for hydrogen evolution, where the rates of 1035 μmol/g for the 4-NP-free sample and 705 μmol/g for the 4-NP-added one were achieved. Finally, the stability and reaction mechanism was mentioned.
研究领域:
材料科学
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环境科学
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化学工程
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高影响因子
危险品化学品经营许可证（带存储）