ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Yu-Xi Feng,Peng Tian,Yu-Juan Lin,Dan-Yang Cao,Cheng-Zhi Li,Abid Ullah
The induction of disruption in the electronic transport chain by thiocyanate (SCN − ) leads to an excessive generation of reactive oxygen species (ROS) within rice ( Oryza sativa ). Hydrogen sulfide (H 2 S) assumes a crucial role as a gaseous signaling molecule, holding significant potential in alleviating SCN − -related stress. Nevertheless, there remains a dearth of understanding regarding the intricate interplay between H 2 S and ROS in Oryza sativa amidst SCN − pollution. In this investigation, a hydroponics-based experiment was meticulously devised to explore how H 2 S-mediated modifications influence the genetic feedback network governing ROS metabolism within the subcellular organelles of Oryza sativa when exposed to varying effective concentrations (EC 20 : 24 mg SCN/L; EC 50 : 96 mg SCN/L; EC 75 : 300 mg SCN/L) of SCN − . The findings unveiled the enhanced capacity of Oryza sativa to uptake SCN − under H 2 S + SCN − treatments in comparison to SCN − treatments alone. Notably, the relative growth rate (RGR) of seedlings subjected to H 2 S + SCN − exhibited a superior performance when contrasted with seedlings exposed solely to SCN − . Furthermore, the application of exogenous H 2 S yielded a significant reduction in ROS levels within Oryza sativa tissues during SCN − exposure. To elucidate the intricacies of gene regulation governing ROS metabolism at the mRNA level, the 52 targeted genes were categorized into four distinct types, namely: initial regulatory ROS generation genes (ROS-I), direct ROS scavenging genes (ROS-II), indirect ROS scavenging genes (ROS-III), and lipid oxidation genes (ROS-IV). On the whole, exogenous H 2 S exhibited the capacity to activate the majority of ROS-I ∼ ROS-IV genes within both Oryza sativa tissues at the EC 20 concentration of SCN − . However, genetic positive/negative feedback networks emphasized the pivotal role of ROS-II genes in governing ROS metabolism within Oryza sativa . Notably, these genes were predominantly activated within the cytoplasm, chloroplasts, mitochondria, peroxisomes, and the cell wall.
研究领域:
植物生理学
·
分子生物学
·
环境科学
·
农学
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DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2024
·
IF 4.9
Lucheng Zhang,Lu Wang,Mingqing Zhang,Tingting Wang,Gang Kang,Shilong Wu,Yi She
Cyanide has been widely used in gold extraction due to its cost-effectiveness, high selectivity and recovery. Regrettably, its wide application also leads to the presence of a large amount of thiocyanogen (SCN − ) in the tail liquid of mineral processing plants, which affects the quality of the effluent water, and thus poses a threat to the ecological environment and human health. This paper investigates the degradation of high concentration of SCN − in water using electrochemical oxidation/periodate (E-GP/PI) system. A degradation rate of 90.25 % of SCN − was achieved by optimising various operating parameters. The effects of organic matter and typical heavy metal ion concentrations on the degradation of SCN − were investigated, and it was found that Cu 2+ was able to promote the degradation of SCN − through the formation of stable complexes with SCN − , which enhanced the degradation rate to 96.48 %. However, the presence of Octadecyltrimethylammonium bromide (OTAB) and butylxanthin hindered the degradation process, where 500 mg/L of OTAB reduced the degradation rate of SCN − to 80.88 %, while 100 mg/L of butylxanthin reduced the degradation rate to 78.66 %. On this basis, experiments were carried out using real wastewater samples and SCN − degradation efficiencies of about 90 % were obtained. Afterwards, through electron paramagnetic resonance analysis, free radical burst, ion chromatograph and other research techniques, IO 3 and O 2 – were obtained as the main drivers of SCN − degradation and SCN − degradation pathways were elucidated. Finally, the E-GP/PI system was shown to be effective in reducing the ecotoxicity of SCN − by increasing the 24-h LC 50 from 12.5 % to 48.5 % in a toxicity test with daphnia . This study provides a new idea for the green and efficient treatment of SCN − rich beneficiation tail liquid.
研究领域:
环境科学
·
电化学工程
·
废水处理
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DOI
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Shaoyuan Su,Ziqi Zheng,Qi-Long Zhang,Xin-Long Ni
In this work, a water-soluble cationic fluorescent probe with AIE features exhibited unique sensing of charge-diffuse anions, namely, SCN − , PF 6 − , and HSO 3 − via ionic interactions and the subtle cooperation of the tunable hydrophobicity . The effect of the fatty chain length on the cationic probes indicated that the sensitivity and selectivity of the probes can be rationally improved by switching their aggregation tendency (hydrophobic effect) in water or by integrating them in the form of a fluorescence chemosensor array. SEM images suggest that different morphologies were formed in the anion-recognition-triggered self-assemblies of the probes, which can be attributed to the different anion molecular geometries. Additionally, the precipitation of the SCN − -recognition complex provided a new insight to the separation of anions from an aqueous environment .
研究领域:
分析化学
·
环境科学
·
材料科学
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DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Bo Wang,Shuangjiang Li,Xiandong Hao,Wenbo Zhao,Zhiyong Xu,Yongming Luo
Traditional amine scrubbing for SO 2 capture typically dilutes alcohol amines with water to improve mass transfer, resulting in high volatility and desorption energy consumption. Inspired by the exceptional properties of ionic liquid (IL) 1-ethyl-3-methylimidazolium thiocyanate ([EMIM][SCN]), we herein propose substituting water with [EMIM][SCN] in a novel SO 2 absorbent system based on N -methyl ethanolamine (MDEA). MDEA acts as the primary SO 2 absorbent, while [EMIM][SCN] serves as an auxiliary absorption component and physical properties regulator. Performance evaluations reveal that MDEA-[EMIM][SCN] achieves high thermal stability (~483.15 K), low viscosity (~26 mPa s), excellent absorption capacity (~1.64 mol/kg at 298.15 K and 2000 ppm SO 2 ), high SO 2 /CO 2 selectivity (~101), and low desorption energy (approximately −95.6 kJ/mol). Thermodynamic modeling illustrates MDEA and [EMIM][SCN] contribute independently to absorption. Optimal energy consumption was determined by the proposed objective function. This work exemplifies the non-aqueous alkanolamine/IL system for SO 2 capture, offering a promising approach for developing efficient, low-energy SO 2 absorbents.
研究领域:
化学工程
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环境科学
·
热力学
·
绿色化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Zining Zhang,Huakang Yang,Xiya Chen,Chenxi Ye,Yudong Guo,Qiyi Gan,Jun Liu,Dongxiang Luo,Xiao Liu
The increasingly growing global demand for sustainable energy solutions has heightened emphasis on photocatalytic hydrogen production as a crucial technological advancement. This study represents a significant advancement in this field by creating gradient-alloyed quantum dots (QDs) composed of CdS@Zn x Cd 1-x S@ZnS structures, which demonstrates exceptional photocatalytic activity for hydrogen evolution. By using an innovative dual-ligand engineering approach that incorporates both mercaptopropionic acid (MPA) and thiocyanate (SCN) ligands, we have achieved a substantial enhancement in photocatalytic activity, demonstrating a 3.83-fold increase compared to MPA-QDs and an extraordinary 97.43-fold increase relative to SCN-QDs. This enhancement is attributed to the synergistic interactions between inorganic and organic ligands, which optimizes the dynamics of electron and hole transfer. The HOMO energy level from MPA, coupled with the strong electrostatic interactions of the inorganic ligands, markedly improves the redox properties of the QDs, leading to an impressive hydrogen evolution rate of approximately 1422.7 μmol/g h. Our findings elucidate the critical role of surface ligands in modulating redox reactions and demonstrate the potential of dual-ligand systems to substantially surpass the performance of single-ligand systems. This research provides a novel strategy for optimizing the photocatalytic performance of QDs, representing a significant advancement in the pursuit of efficient and sustainable hydrogen production methods, with broader implications for the fields of photocatalysis and optoelectronics.
研究领域:
光催化
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纳米技术
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材料科学
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制氢
·
光电子学
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DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Junyun Cheng,Chenruobing Zhang,Jie Lin,Yeqiu Zhao,Yu Huang,Meiqing Shi,Zhiqi Zhu,Liyuan Chai,Xu Yan,Qingwei Wang
The coking industry generates hazardous desulfurization waste liquid (DWL), which contains abundant sulfur-containing salts such as ammonium thiocyanate (AT), ammonium sulfate (AS), and ammonium thiosulfate. However, improper handling of DWL poses severe environmental risks. Conventional treatment methods, including high-temperature pyrolysis, chemical precipitation, and evaporation crystallization, suffer from critical limitations: low sulfur recovery rates (typically 40%–70%), high operational costs, and insufficient product purity. To address these challenges, this study innovatively proposes an evaporation-cooling pretreatment process guided by the NH₄SCN-AS-H₂O ternary phase equilibrium system. For the first time, this method achieves ultra-high-purity products: ammonium thiocyanate (AT) at 98.54% purity and ammonium sulfate (AS) at 99.92% purity, with a total sulfur recovery rate of 90.92%—40% higher than traditional approaches. Additionally, the mixed salt (MS) byproduct undergoes solvent crystallization to yield secondary products with purity exceeding 99.96%, eliminating the need for toxic reagents. By integrating phase diagram-guided optimization with streamlined operational procedures, this process significantly reduces costs while ensuring environmental sustainability, thereby establishing a novel pathway for resource recovery from DWL.
研究领域:
环境工程
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化工技术
·
资源回收
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 31
·18475-18483
·
IF 4.6
Zhang Quan-Wei,Tian Zi-Han,Wu Ming-Xing,Ma Chen-Yuan,Bi Xing-Yu,Fang Zhi,Duan Mei-Hong
Exploring high-performance birefringent crystals holds
paramount
significance in modern optics, yet traditional candidates generally
struggle to reconcile substantial birefringence with broad spectral
transparency. To circumvent this long-standing bottleneck, a synergistic
multifunctional-group assembly strategy has been devised to guide
the rational design of birefringent crystals. Correspondingly, driven
by lanthanide coordination and hydrogen bonding, two kinds of π-conjugated
units were successfully incorporated into a new birefringent crystal,
Ce(2,2 ′ -bipyridyl) 3 (SCN) 3 . Synthesized
via a facile solution evaporation method, Ce(2,2 ′ -bipyridyl) 3 (SCN) 3 was characterized by a large birefringence
of 0.18@546 nm, broad transmission windows (nearly spanning 0.445–25
μm), and moderate thermal stability (up to 270 ° C), making
it favorable for practical applications.
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JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Chen Wang,Yuran Gui,Meihui Wu,Tong Wu,Haiping Wang,Wanxia Gao,Jiang Zheng,Na Zhao,Yibin Zhang,Xiji Shu,Jinting Shang
Hydrogen sulfide (H₂S) is a colorless compound with a characteristic rotten egg odor that serves as a significant indicator of pathological processes and food spoilage. In this study, we developed a novel probe SCN for H 2 S detection. When exposed to H 2 S, the Probe SCN selectively cleaves the oxygen-nitrile bond, resulting in a strong red fluorescence emission at 662 nm, which can be attributed to recovery from the intramolecular charge transfer (ICT) effect. This probe demonstrated outstanding features, including a substantial Stokes shift (236 nm) and a low detection limit of 0.41 μM. We successfully used the Probe SCN to detect H 2 S changes in common food samples such as eggs, fish, pork, and shrimp. Furthermore, the Probe SCN can also be used to detect H 2 S in living cells and mice. These findings confirmed the effectiveness of the SCN probe as a real-time tool for H 2 S detection and related imaging applications.
研究领域:
生物化学
·
分析化学
·
医学影像
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DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Meihui Ren,Haijun Zhang,Yun Fan,Dan Wang,Rong Cao,Yuan Gao,Jiping Chen
Thiourea can effectively inhibit the formation of highly toxic chlorinated aromatics in postcombustion zone. However, the inhibition mechanism was still not adequately understood. In this study, naphthalene was adopted as a model aromatic compound to investigate the inhibition effect and mechanism of thiourea on the formation of chlorinated aromatics via electrophilic chlorination over Cu and Fe chlorides. Thiourea addition resulted in the reductions of 77.6–99.8% and 36.4–98.1% in the yield of polychlorinated naphthalenes from naphthalene chlorination mediated by CuCl2 and FeCl3 at 150–300 °C, respectively. The inhibition efficiency of chlorination presented a decreasing tendency with increasing reaction temperature and O2 content in flue gas. X-ray diffraction analysis revealed that the thiourea-induced reduction of highly active Cu (II) and Fe (III) chlorides to less active Cu (I) and Fe (II) chlorides was a primary mechanism for inhibiting aromatic chlorination. [thiourea–Cu]+ complex generated during the reduction process could be transformed into CuS and Cu2S, and isomeric reaction product NH4SCN could react with Cu2+ to produce Cu(SCN)2 and then also form Cu sulfides, suggesting sulfidization of Cu chloride was another important inhibition mechanism. Chlorination inhibition induced by the volatile decomposition products of thiourea might only play a minor role.
研究领域:
环境科学
·
化学工程
·
催化
·
燃烧化学
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Fanqiang Bu,Bing Zhao,Wei Kan,Liyan Wang,Bo Song,Jianxin Wang,Zhe Zhang,Qigang Deng,Guangming Yin
Ag + and SCN − play extremely important roles in the fields of the physiology and environment. In this work, on the basis of phenanthro[9,10- d ]imidazole derivative ( DIPIP ) which can exhibit the aggregation-induced emission (AIE) properties in aqueous solution, we achieved a sequential on-off-on switch for Ag + and SCN − with high selectivity and sensitivity. A remarkable fluorescence quenching effect of Ag + on the probe DIPIP was observed with 1:2 stoichiometry , Subsequently, the fluorescence intensity of in situ generated DIPIP -Ag + ensemble was easily switched on after the interaction between Ag + and SCN − , which was attributed to the stronger affinity of SCN − to capture Ag + . In particular, the extreme limits of detection (LOD) for Ag + and SCN − in standard solutions were as low as to be 74.5 nM and 7.8 nM, respectively. Furthermore, the probe DIPIP and the DIPIP -Ag + ensemble could be used to detect Ag + in the real water and SCN − in smoker saliva samples, respectively. In addition, the sequential “on-off-on” fluorescence mode of DIPIP to Ag + and SCN − were also successfully applied in living HeLa cells.
研究领域:
分析化学
·
环境科学
·
生物化学
·
细胞生物学
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DOI
PubMed
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JOURNAL OF PHYSICAL CHEMISTRY B
·
2017
·
IF 3.177
Wangqin Song,Jie Zhu,Lvdan Liu,Guangming Liu
Macromolecular crowding could influence the binding affinity of the polyzwitterion-conjugated proteins. Herein, the hydrolysis of N-succinyl-Ala-Ala-Pro-Phe p-nitroanilide by the poly(carboxybetaine) conjugated α-chymotrypsin (PCT) was employed as a model system to investigate the modulation of the binding affinity of the polyzwitterion-conjugated proteins by the ion-specific effects in the crowded environments. In comparison with the bare α-chymotrypsin (BCT), the binding affinity of the PCT to the peptide is stronger in the dilute solutions but becomes weaker in the crowded environments. Our study demonstrates that the kosmotropic Ac– anion is incapable of achieving a stronger enzymatic binding affinity of the PCT than the BCT in the highly crowded environments. By contrast, the binding affinity of the PCT can be enhanced to be stronger than that of the BCT by the chaotropic SCN– anion in the crowded environments.
研究领域:
生物物理学
·
生物化学
·
分子生物学
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DOI
PubMed
高影响因子
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