SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
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IF 9
Wenze Zhang,Yukun Duan,Xiaopeng Chi,Wen Tan,Wei Weng,Shuiping Zhong
In the zinc production industry using Mn-rich zinc ore, substantial quantities of anodic slime are generated during electrolytic zinc production, containing ∼ 40 % Mn and ∼ 3 % Pb. While a valuable secondary resource, this material poses environmental risks as solid waste. Conventional reductive leaching methods rely on costly reductants and generate high carbon emissions. This study introduces a process utilizing flue gas from zinc plants as a reductant, achieving 92 % Mn leaching efficiency while simultaneously extracting 25 % Sr and fixing 92 % SO 2 as sulfate in solution. Kinetic analysis shows a mixed control model with an activation energy of 13.83 kJ/mol, with reaction rates further enhanced by optimizing gas inlet design. The MnSO 4 -rich leachate is processed into battery-grade MnSO 4 powder, and Sr is recovered as SrCO 3 , suitable for use as an additive in electrolytic zinc processes. Additionally, NaOH consumption for flue gas desulfurization decreases significantly from 2.14 kg to 0.17 kg per Nm 3 . Economic evaluation indicates reagent costs represent only 2 % of the total value of MnSO 4 and SrCO 3 products, offering a sustainable pathway for anodic slime utilization and SO 2 mitigation in zinc smelting.
研究领域:
冶金工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Leipeng Ji,Haomiao Xu,Xiaoming Sun,Wenjun Huang,Zan Qu,Yongjun Wang,Anbang Zhang,Naiqiang Yan
Sulfidation has been an efficient method for arsenic (As) removal from acid wastewater, yet it is inefficient under neutral and weak acid conditions. The higher pH values resulted in the formation of the unstable As-S precipitates, especially employing Na 2 S as the vulcanizing agent as it can increase the pH value dramatically. Here, we found that SO 2 exhibited excellent multi-roles in As removal when applying H 2 S-sulfidation method. The acidification effect of SO 2 lead to the decreasing of pH values, guaranteed the stable As-S precipitates formation. Through the SO 2 pre-treatment method, the results indicated that the pH values decreased from 7 to 2.8, with the increased H 2 S utilization efficiencies for As(III) removal from 20.9% to 92.0%. Moreover, SO 2 post-treatment not only increased the As(III) removal efficiency, but also eliminated the excessive sulfides in solution. The reaction mechanism analysis indicated that the liquid comproportionation reaction between SO 2 and excessive sulfides plays a vital role. The generated nascent sulfur (N-S 0 ) can adsorb arsenic species and promote the agglomeration of As(III)-S precipitates. Furthermore, the SO 2 and H 2 S co-treatment exhibited excellent As(V) removal performance. This study provides a new alternative method to improve the H 2 S-sulfidation process with SO 2 for As removal from wastewater.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL SOCIETY REVIEWS
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2025
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IF 39
Wei Xiao,Jian-Qiang Chen,Jie Wu
Sulfur dioxide is a toxic atmospheric pollutant, primarily emitted from the combustion of sulfur-containing fossil fuels. The development of clean and cost-effective chemical processes for capturing SO2 has garnered significant interest from both industry and academia. On the other hand, sulfonyl-derived functional groups occupy a significant position in pharmaceuticals, agrochemicals and materials science. As versatile building blocks, sulfonyl groups can be utilized in a variety of bond-forming reactions in modern organic chemistry. Thus, the direct synthesis of these SO2-containing compounds from SO2 under mild conditions represents a more atom-efficient and greener approach. Owing to the troublesome issue of using toxic and malodorous gaseous SO2, sulfonylation reactions involving diverse SO2 surrogates provide an efficient and promising method for the synthesis of SO2-containing compounds. Since 2014, radical-mediated SO2 insertion strategies have attracted significant attention. By using photocatalysis, electrochemistry, transition-metal catalysis, and thermal initiation, significant progress has been made toward radical sulfonylation with SO2 surrogates. This review highlights the advances from the past decade that provide readers with essential tools for designing and implementing radical sulfonylation using SO2 surrogates in organic synthesis.
研究领域:
有机化学
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环境化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhiyuan Zhang,Guixia Fan,Guoli Zhou,Daoguang Teng,Hongyan Nan,Peng Li,Yijun Cao,Jiongtian Liu
Germanium, a critical metal, is predominantly located in lignite and lead–zinc ore. The germanium was commonly extracted from the fly ash of germanium-rich lignite (GRL), however, facing the challenges of specific combustion conditions, low lignite’s thermal efficiency and value, high CO 2 emissions, and waste acid treatment. Therefore, in this work, a novel method for directly leaching germanium from the GRL was proposed, facilitating low-carbon extraction under mild conditions, and reducing lignite loss during leaching process. Results showed that leaching germanium from the GRL using thionyl chloride achieved the goals of “kill two birds with one stone”, i.e. , leaching efficiency of germanium above 95 wt % and recovery yield of lignite over 95 wt %. Specifically, the theoretical leaching efficiency of germanium reached 99.60 wt % while the recovery yield of lignite reached 86.35 wt %, at the temperature of 20 °C, liquid–solid ratio of 4 mL/g, and leaching time of 6 h. Most of the leached germanium was remained in the aqueous phase after the leaching solution was quenched, facilitating the subsequent separation of germanium. In this study, efficient extraction of germanium from the GRL was achieved with a high recovery yield of lignite, preserving the matrix structure and main composition of lignite. Therefore, this method provides a feasible way for efficient extraction of germanium from lignite with low-carbon emission under mild condition.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Senlin Tian,Shanshan Yang,Jianfei Wang,Qiuxian Li,Chen Li,Xiangfen Cui,Ping Ning
Nitrogen and sulfur oxides have been considered as major air pollutants , which has raised concerns. In this study, an integrated strategy is proposed for simultaneous desulfurization and denitrification of simulated flue gas and high value conversion of sulfur and nitrogen resources. The high oxidation capacity of the thermal-electric coactivated (NH 4 ) 2 S 2 O 8 made the process highly effective for SO 2 and NO removal, with efficiencies of 100 % and 98 %, respectively. Mechanistic studies have revealed that highly reactive free radicals were the major participants in promoting oxidation, among which 47.65 % and 27.75 % of NO were oxidized by SO 4 .- and ˙OH, respectively, and 14.3 % and 10.3 % removal were accounted for O 2 .- and 1 O 2 , respectively. The products of desulfurization and denitrification (SO 4 2- and NO 3 - ) were further converted into NH 4 + (maximum conversion efficiency of 83.80 %) and S 2 O 8 2- (maximum conversion efficiency of 70 %) in an electrolytic reactor, and the regenerated (NH 4 ) 2 S 2 O 8 could be recycled for gas purification to extend the service life of the oxidant. Consequently, a complete conversion cycle of S and N species was obtained, and its conversion pathways were proposed. After several cycles, the SO 4 2- and NO 3 - enriched in the solution were post-processed into a compound fertilizer, thereby partially recovering the economic cost.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
BIOORGANIC CHEMISTRY
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2024
·
IF 4.5
Kun Yao,Hua Liu,Binbin Fang,Congyang Xia,Lingmin Gu,Lin Fang,Haohao Zhu,Jie Pan,Guofu Zhang
Sulfite is one of the main existing forms of sulfur dioxide (SO 2 ) in living system, which has been recognized as an endogenous mediator in inflammation. Evidence has accumulated to show that abnormal level of sulfite is associated with many inflammatory diseases, including neurological diseases and cancers. Herein, a novel fluorescent probe named QX-OA was designed and synthesized to detect sulfite. QX-OA was constructed by choosing quinolinium-xanthene as the fluorophore and levulinate as the specific and relatively steady recognition reaction. The probe showed remarkable green turn-on signal at 550 nm, together with high sensitivity (90-fold) and excellent selectivity to sulfite over other possible interfering species. In the meantime, QX-OA was successfully applied to visualize endogenous and exogenous sulfite in Hela cells. In the LPS-induced inflammation model, QX-OA could visualize the dose-dependent increase of sulfite level (0-2 mg/mL). Consequently, QX-OA was determined to be a potential method for detecting sulfite in pre-clinical diagnosis.
研究领域:
生物化学
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医学诊断
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细胞生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ATMOSPHERIC ENVIRONMENT
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2024
·
IF 4.2
Hongxing Yang,Wangjin Yang,Jiawei Ma,Chong Han
The heterogeneous reactions of SO 2 on organic aerosols (OA) have been proposed as a significant source of sulfates. The photochemical conversion of SO 2 to sulfates on the surface of light-absorbing OA, i.e., brown carbon (BrC), remained slight understanding. Herein, the photochemical uptake of SO 2 on typical BrC species, including aromatic carbonyl compounds (ACs), polycyclic aromatic hydrocarbons (PAHs) and phenols (PHs), was systematically investigated by a flow tube reactor. Light can significantly promote the uptake of SO 2 on all BrC species used here, especially for ACs. The initial and steady-state uptake coefficients (γ i and γ ss ) of SO 2 exhibited positive relationships with the light intensity, whereas they negatively correlated with the initial SO 2 concentration. Significant sulfate formation was clearly observed with in situ attenuated total internal reflection infrared (ATR-IR) spectrometer, and H 2 O and O 2 had obvious enhancement effects on the sulfate production. Photoinduced •OH, which primarily originated from •O 2 − that was generated through an electron transfer process on BrC under irradiation, was determined to be a key driver for the oxidation of SO 2 to sulfates. Finally, SO 2 lifetime and sulfate formation rate were evaluated on the basis of experimental results, highlighting potential contributions of BrC photochemistry to atmospheric SO 2 loss and sulfate sources.
研究领域:
大气科学
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环境化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Xing Li,Lintao Chen,Yugo Osaka,Zhaohong He,Lisheng Deng,Hongyu Huang
Sulfur dioxide (SO 2 ) emissions from ship exhaust pose a serious threat to the environment and human health. In this study, various manganese oxide (MnO x ) samples with different physical and chemical structures were prepared using template, precipitation, ball milling, calcination, and microwave methods for the desulfurization of ship exhaust. The MnO x samples were characterized intensively through scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller analysis. The desulfurization performance was measured via thermogravimetry, and the desulfurization mechanism of the different MnO x samples was investigated. Results showed that the desulfurization performance of MnO x was determined by the comprehensive influence of the material’s pore structure, specific surface area, crystal structure, Mn valence content, and reaction temperature. The pore structure in MnO x considerably affected the desulfurization performance of MnO x . In our experiment, tp-MnO x prepared using the template method presented a rich 3D pore structure, a large specific surface area, and excellent desulfurization performance. At 400 °C, the average SO 2 capture rate of tp-MnO x in the first hour was 0.283 g SO2 /g material ·h. The highest SO 2 capture rate of tp-MnO x was 0.694 g SO2 /g material observed at 500 °C.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Zhang-Min Li,Shu-Xian Zhu,Fei-Feng Mao,Yan Zhou,Wenshuai Zhu,Duan-Jian Tao
Currently available aerogels as effective adsorption materials for capture of trace sulfur dioxide (SO 2 ) are unfavorable from the perspective of deep desulfurization technologies. Herein, four phenolic resin-based aerogels with controlled structures varying from spherical (∼1 μm) to nanofiber (∼20 nm) were prepared and characterized using hexadecyl trimethyl ammonium bromide (CATB) as a soft template. It is demonstrated that adjusting the usage amount of CTAB from 0.00 to 0.15 g could effectively regulate SO 2 adsorption capacities of phenolic resin-based aerogels. AG-0.15 nanofiber aerogel exhibited an outstanding SO 2 uptake through a swelling mechanism (10.58 mmol g −1 at 298.2 K, 1.0 bar), and displayed a very high SO 2 /N 2 selectivity (7271 at 298.2 K). Moreover, AG-0.15 nanofiber aerogel also had excellent performance for selective capture of 2000 ppm SO 2 in the mixed SO 2 /N 2 /CO 2 gases through dynamic column breakthrough experiments. Overall, phenolic resin-based nanofiber aerogels are perceived as a promising adsorbent for effective removal of trace SO 2 from flue gas.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2023
·
IF 1.2
Gulgina Mamtmin,Patima Nizamidin,Reyanggu Abula,Abliz Yimit
Composite optical waveguide sensors show immense potential for the trace-level detection of harmful gases owing to their high sensitivity. Herein, we prepared a highly sensitive ZnO film/K + ion-exchanged composite optical waveguide sensor by fixing a thin ZnO film layer on the surface of a K + ion-exchanged glass optical waveguide. To study the influence of the preparation method on the gas sensitivity of the sensing element, 5,10,15,20-tetrakis-(4-methoxyphenyl)porphyrin was used as a sensing layer on the surface of the ZnO film and fixed via the spin-coating and immersion methods. The gas sensitivity of the sensors prepared by the two methods was comparatively studied. The sensor elements prepared by the immersion method showed higher sensitivity than those prepared by the spin-coating method. Furthermore, the reasons for the difference in the gas sensitivity are discussed in detail. The experimental results show that the as-prepared sensor can detect ppt levels of H 2 S and SO 2 gases and has potential application in the detection of trace levels of sulfide gases in the environment and in industrial production.
研究领域:
材料科学
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环境科学
·
光学工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Siheng Qian,Jing Hu,Rimin You,Xiaobing Wang,Lifeng Yang,Huabin Xing,Xili Cui
SO2 emission has become an important issue due to its harmful impact on human health and the ecological environment. Adsorption separation is an energy-efficient technology to capture SO2, but it suffers from competitive adsorption of CO2. Here, we present a strategy to improve the separation performance of porous adsorbents through the fabrication of mixed-matrix adsorbents. By the introduction of a perm-selective polymer (P(D[VImC6]Br)) as the matrix to enclose anion-pillared microporous materials (SIFSIX-3-Ni), CO2 molecules were selectively blocked, while the SO2 molecules could still permeate the polymer matrix and access the porous particles of SIFSIX-3-Ni. As a result, a high SO20.2%/CO210% uptake ratio of 32 at 298 K and 1 bar and a high SO2 uptake capacity of 0.67 mmol g–1 at 0.002 bar were achieved for the mixed-matrix adsorbents of SIFSIX-3-Ni@PIL-1/1. The strategy for fabricating a perm-selective matrix around the porous adsorbent particles to improve the adsorption performance is generally applicable to other porous adsorbents.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
·
2024
·
IF 2.6
Liu Bo,Zhao Menghan,Ai Yangyi,Liu Xiaoru,Sun Ye,Wu Zhaoxia,Ho Chi-Tang,Yan Tingcai
Blueberry wine is a nutritional wine which aroma is affected severely by the fermenting condition. In this study, the influence of sulfur dioxide on the volatile composition and aroma of blueberry wine was comprehensively explored. The results indicated that in normal blueberry wine (NBW) fermented with sulfur dioxide, the titratable acid (TA) and total soluble solids content (TSSC) decreased slightly, whereas the ethanol, total phenolic, and vitamin C (Vc) contents increased significantly. The amount of volatile compounds declined significantly to 575 compared to 670 in traditional blueberry wine (TBW), and the relative concentrations of alcohols, acids, esters, and aldehydes markedly reduced. The relative odor activity value (ROAV) of 2,3-butanedione was the highest, and the number of the key aroma compounds shrunk obviously. The sweet, green, and fruity odors declined mainly ascribing to the reduction of 2-heptanol, acetic acid hexyl ester and 2-methyl-butanoic acid ethyl ester. The herbal, woody and floral odor mainly attributed to high contents of linalool, cyclohexene, 4-dimethyl-3-cyclohexene-1-ethanol, and ethyl nonanoate. These results indicated that sulfur dioxide retained some nutritional components, while it decreased the variety of the volatile compounds and affected the aroma of blueberry wine. Graphical abstract
研究领域:
食品科学
·
发酵工程
✓ 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）