INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Boyun Wang,Wanqi Zhang,Yuan Zhong,Yuan Guo,Ximing Wang,Xiaotao Zhang
Ions of mercury, one of the most hazardous heavy metals in nature, pose serious risks to the environment and human health. Blue sulfur-doped carbon dots (SCDs) from corn stalks were utilized as material. The SCDs were incorporated into a carboxylated hydrogel modified with sulfur, and a compound gel (SCDs–KTOCS gel) was successfully fabricated for simultaneous fluorescence detection and Hg(II) adsorption. This enabled the effective identification and removal of Hg(II) from contaminated water. The chemical content, fluorescence properties, and adsorption behaviors of the SCDs–KTOCS–gels were analyzed. The results demonstrate that the SCDs–KTOCS–gels exhibited effective Hg(II) adsorption (193 mg/g) and an extensive linear spectrum for Hg(II) fluorescence emission (150–500 mg/L; detection limit = 1.5668 mg/L). The adsorption values fit well with the Temkin models and pseudo-second-order kinetics. Additionally, Hg(II) detection and adsorption in the SCDs–KTOCS–gels were examined. By exchanging the existing probe for a suitable one that fits various relevant applications, this study suggests an environmentally friendly and sustainable method of producing materials for removing and detecting Hg(II) and constructing a fluorescence hydrogel for the detection and adsorption of different metals.
研究领域:
环境科学
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材料科学
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化学
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可持续技术
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产品关联
DOI
PubMed
高影响因子
COLLOID AND POLYMER SCIENCE
·
2014
·Vol. 292
·期 9
·2157-2172
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IF 2.41
Chen Xing Juan,Cai Jian Chong,Zhang Zheng Han,Liu Li Jia,Yang Guang Lei
A novel cross-linked chitosan-poly(aspartic acid) chelating resin was synthesized by combining chitosan and poly(aspartic acid) derivative with crosslinker. The structure and morphology of the resin containing disulfide bonds were characterized by 1 H NMR, FT-IR, Raman spectra, and SEM. Adsorption of Pb(II) and Hg(II) from aqueous solution by the resulted chelating resin was investigated in batch techniques. The result of the Raman spectra suggests that the disulfide bonds in the resin also play an important role in the adsorption of Pb(II) and Hg(II). The kinetic data were fitted to pseudo-first-order, pseudo-second-order, and intraparticle diffusion models, which is suggestive of following closely the pseudo-second-order kinetic model. Equilibrium data were fitted to Langmuir, Freundlich, and D–R isotherm models. The results of equilibrium isotherm reveal that the empirical Langmuir equation provides an accurate description of the experimental data under the studied concentration range. In addition, thermodynamic and regeneration properties of the adsorbent were also studied.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2021
·
IF 6.901
Jinrui Li,Zhongxin Zhuang,Zheng Guo,Zhonggang Liu,Xingjiu Huang
Exploiting advanced bimetallic oxide as sensing materials for electroanalysis offers new opportunity to improve the electrochemical performance, but still presents a tough challenge. Herein, we synthesized the uniform Fe 2 O 3 /Mn 3 O 4 nanocubes from a framework structure in a facile approach, which were developed as the electrochemical catalyst for individual and simultaneous analysis of Cu(II) and Hg(II) in 0.1 M HAc-NaAc buffer solution (pH5.0). It showed the excellent electrochemical behavior for the simultaneous analysis Cu(II) and Hg(II) with high sensitivities of 69.29 and 190.55 μA μM cm −2 . The corresponding limit of detection values (LODs) were calculated to be 3.94 nM and 1.39 nM, respectively. The excellent electrochemical behavior of Fe 2 O 3 /Mn 3 O 4 could be attributed to the large specific surface area, which could provide a large number of adsorption sites for Cu(II) and Hg(II). Meanwhile, the bimetallic Fe and Mn atoms arranged in the porous nanocubes could offer a synergistic effect and improve the electrochemical activity. Moreover, it could be successfully applied for the simultaneous analysis of Cu(II) and Hg(II) in real water samples with the favorable recovery rate. The results confirmed that the Fe 2 O 3 /Mn 3 O 4 nanocubes could serve as a reliable platform for the simultaneous analysis of Cu(II) and Hg(II).
研究领域:
分析化学
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材料科学
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DOI
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
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2021
·Vol. 68
·期 9
·1739-1747
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IF 1.967
Xiaoqing Wang,Jing Zhang,Zimeng Xu,Chen Rao,Leilei Pi,Yaqin Fu,Yubing Dong,Chen Shen,Lanying Yao,Chunhua Xiong
The MCTS-g-AT was developed as a novel magnetic adsorbent with core-shell structure. Its unique synthesis route endows MCTS-g-AT with green, convenient, economical and safe characteristics, and also good selective adsorption of Hg(II). The material was characterized using an appropriate set of spectroscopic and analytical techniques (SEM, EDS, XRD, VSM, FTIR, and TGA). Its adsorption kinetics fits the pseudo-secondary model well and adsorption isotherm fits the Langmuir equation well, suggesting the mechanism of chemisorption with monolayer adsorption. The results of the thermodynamic parameters indicate spontaneous and endothermic process. Column adsorption experiments showed that the maximum adsorption capacity of Hg(II) was 207.6 mg/g (298 K). Moreover, the Hg(II) adsorbed on composite microspheres was completely eluted by 3 mol/L HNO 3 or 4 mol/L HCl. Furthermore, MCTS-g-AT adsorption column combined with spectrophotometer can achieve more accurate detection of Hg(II) in aquatic products.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2020
·
IF 4.794
Guo Lin,Chen Wang,Xiteng Li,Yunhao Xi,Wei Wang,Libo Zhang,Jun Chang
At present, the functionalized Zr-based coordination polymer for heavy metal ions removal are primarily implemented via post-synthesis, and it is still a challenge to reduce the concentration of heavy metal ions to wastewater discharge standard. In this work, the 2,2′-dithiodipropionic acid modified Zr-based coordination polymer (named as Zr-DTDPA) was prepared by direct synthesis. It presented extraordinary adsorption ability in the process of removing Hg(II)/Pb(II). The optimum pH for Hg(II) and Pb(II) absorption was 4.0 and 6.0, respectively, and the saturated adsorption capacity reached 960 mg/g and 478 mg/g. The adsorption process can be exceedingly fitted by Langmuir isotherm model and pseudo-second-order (PSO) kinetic model, which indicated that chemisorption played a dominant role. Additionally, the maximum selectivity coefficient reached 21.36 × 10 5 and 5605 for Hg(II) and Pb(II). Impressively, the residual contents of Hg(II) and Pb(II) were only 1.04 μg/L and 0.34 mg/L, which respectively reached the concentration standard of Hg(II) and Pb(II) in wastewater. Zr-DTDPA was easy to be regenerated, and the removal rate of Hg(II) had only decreased by 17.15% after ten consecutive cycles. The results of Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) suggested that the adsorption performance of Zr-DTDPA toward Hg(II)/Pb(II) was primarily determined by thiol/thio groups, and the adsorption mechanism was the interaction between sulfur atoms and Hg(II)/Pb(II) ions.
研究领域:
环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Hongbo Wang,Xinyu Zhao,Xuechun Zhou,Xiaoyu He,Lizhi Xiao,Xun Zhang,Ying Zhang,Shu Nie,Yingnan Jiang
Amoxicillin was used as the sole precursor to rapidly synthesize amoxicillin carbon nanodots via a one-step microwave method. The diameter of the amoxicillin carbon nanodots was concentrated at 1.8 ± 0.6 nm, with fluorescence excitation-dependent characteristics. After characterization, the carbon nanodots retained some of the amoxicillin structure, exhibiting low biological toxicity and good antibacterial activity. Due to the formation of the carbon dots structure, the hydrophilicity and water solubility of the amoxicillin carbon nanodots improved. An antibacterial plate experiment further showed that the antibacterial performance of the amoxicillin carbon nanodots was higher than that of the original amoxicillin. The amoxicillin carbon nanodots could quickly and conveniently detect Hg 2+ via changes in their fluorescence intensity. Moreover, several aliphatic alcohols could be distinguished and quantified based on the fluorescence intensity increase of the amoxicillin carbon nanodots. Most importantly, the amoxicillin carbon nanodots quickly identified and quantified methanol mixed in edible alcohol. These multifunctional amoxicillin carbon nanodots have broad application prospects in antibiosis, toxic Hg 2+ detection, and identification and detection of several aliphatic alcohols, especially the microfluorometric determination of methanol in edible alcoholic beverages.
研究领域:
纳米技术
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分析化学
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生物医学工程
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环境科学
✓ 已验证
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2021
·
IF 3.975
Yue Sun,Yingpeng Gu,Xiao Li,Rajendra Prasad Singh
As a common heavy metal ion in wastewater, Hg(II) has high toxicity even at low concentration. In this study, a novel magnetic nano-adsorbent (FS@PTL-SH) was synthesized by modifying thiol groups on phase-transited lysozyme (PTL) coated magnetic nanoparticles . FS@PTL-SH exhibited superior adsorption performance for Hg(II) in a wide pH range. The maximum adsorption capacity of FS@PTL-SH fitted by Langmuir model could reach 1001.21 mg/g at 298 K, and 90% of the equilibrium uptake could be achieved within 5 min. The interference of inorganic ions and organic complexing agents was limited even at high concentrations. High adsorption selectivity of Hg(II) was observed in the mixed solution containing various heavy metal ions. Moreover, FS@PTL-SH could still maintain above 90% of the adsorption capacity after five adsorption–desorption cycles. For the mechanisms, the adsorption of FS@PTL-SH for Hg(II) was mainly relied on the strong complexation of the surface functional groups, especially thiol groups.
研究领域:
环境科学
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生物化学
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纳米材料科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Yu Sun,Ying Wu,Yong Fu,Chengyue Yang,Jinwen Jiang,Guiyang Yan,Jianshe Hu
In this study, a new tannic acid cross-linking cellulose/polyethyleneimine functionalized magnetic composite (MCP) as a biomass adsorbent of Hg(II) ions was prepared. The morphology and structure of MCP were characterized with FT-IR, TG, XRD, SEM and TEM . The effect of the different factors such as pH, contact time, initial Hg(II) ion concentration, and adsorption temperature on the adsorption behavior was investigated. The results showed that MCP exhibited an excellent selectivity and reutilization, fast removal rate, and very high adsorption capacity. The corresponding adsorption capacity and removal rate of could reach 99.00% and 247.51 mg/g when the pH value, adsorption time, Hg(II) ion concentration were 5, 180 min and 100 mg/L at 293 K. The kinetics followed the pseudo-second-order, which indicated that the adsorption behavior of MCP for Hg(II) ion belonged to the chemical adsorption process and external diffusion. The thermodynamic study showed that the adsorption process was a spontaneous and exothermic process. After the fifth adsorption-desorption experiment, it still had better adsorption performance and reutilization. All in all, MCP with highly stable and efficient, as well as excellent reusability will be a candidate for industry-level applications from wastewater with Hg(II) ions.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Yajun Zhang,Xiaoliang Zeng,Xiaofang Jiang,Hanjiao Chen,Zhou Long
The cerium (Ce)-based UiO-66 metal-organic frameworks were employed for the first time as an effective catalyst for both oxidation and reduction. On one hand, selenium (Se)(VI) was efficiently photo-reduced to volatile species derived from the low lying of Ce 4f orbital and efficient generation of photo-electrons through the frameworks of UiO-66(Ce); on the other hand, the chromogenic substrate, 3, 3′, 5, 5′-tetramethylbenzydine (TMB), was oxidized based on the oxidase-like behavior of UiO-66(Ce) derived from the Ce 4+ /Ce 3+ spontaneous redox couple. The photo-reduced Se(VI) was determined by atomic fluorescence spectrometry , with a linear range of 5.0–200.0 μg/L − 1 , correlation coefficient of 0.998, and detection limit of 1.5 ng/mL − 1 obtained. The colorimetric sensing of mercury (Hg)(II) was accomplished based on the inhibition of TMB oxidation via Hg (II)-TMB interaction, with two linear ranges of 0.1–2.0 μM and 2.25–4.1 μM obtained, and a correlation coefficient of 0.993 and 0.995 obtained, respectively. The catalytic activity of UiO-66(Ce) was demonstrated to be satisfactory for both oxidation and reduction, which further explored the application of UiO-66(Ce) in the field of catalysis.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Hongyu Guo,Linfang Liang,Jiayi Guo,Liangbin Lin,Fafu Yang
The metal-coordination self-assemble system played an important role on constructing novel supramolecular smart-response materials. Although the single and double-response materials based on metal-induced self-assembly had been studied extensively, the triple responses for this kind of supramolecular material was seldom reported. In this work, the first metal-induced self-assemble system with triple responses on photophysical, liquid crystalline and gel properties was presented based on Hg 2+ -coordination tetraphenylene dimer ( Bis-TPE ). Bis-TPE was prepared by bridging two alkyl-substituted tetraphenylene with amido chain. It possessed the fluorescence response from the strong emission for Bis-TPE to the faint emission for Bis-TPE -Hg 2+ complex. The self-assemble mechanism of Bis-TPE -Hg 2+ was clarified as that Hg 2+ was located in the cavity of the amido-ether chain of Bis-TPE . The Hg 2+ -induced mesomorphic transition was also observed from smectic mesophase for Bis-TPE to hexagonal columnar mesophase for Bis-TPE -Hg 2+ complex. The unique Hg 2+ -induced gel transition was further distinguished from low-order spherical morphology for Bis-TPE to high-order fibrous morphology for Bis-TPE -Hg 2+ complex. The maximum fluorescence wavelength exhibited the giant shift from 494 nm for Bis-TPE in gel to 606 nm for Bis-TPE -Hg 2+ in gel. This kind of triple responses on photophysical, liquid crystalline and gel properties for metal-coordination self-assemble system was described for the first time, affording a new idea on design of new multiple-response materials with unique properties.
研究领域:
超分子化学
·
材料科学
·
配位化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Chen Wang,Guo Lin,Yunhao Xi,Xiteng Li,Zhen Huang,Shixing Wang,Jiling Zhao,Libo Zhang
A novel Zr-MOF adsorbent was synthesized by one-step method and was used to selectively adsorb Hg(II) and Pb(II) from wastewater. The adsorbent can reduce the concentration of mercury and lead to less than the national standard (Hg is 50 μg/L and Pb is 1 mg/L). The entire adsorption process conforms to the pseudo second-order kinetic and Hill isotherm models. At pH 4, the adsorbent removed more than 90% of mercury (to 22 μg/L) and lead (to 0.732 mg/L) in 10 min and 960 min, and the maximum adsorption capacity was 1080 mg/g and 510 mg/g, respectively. In addition, the practical application in wastewater proved that the adsorbent can selectively adsorb Hg(II) and Pb(II) from the mixed ion solution and it still meets national standards for wastewater discharge. The research of repeated experiments proves that the adsorbent can be used repeatedly. The adsorption mechanism was clarified by FTIR, XPS spectroscopy before and after adsorption, and density functional theory (DFT) calculation. In summary, the adsorbent is stable in aqueous solution and has great potential for the efficient removal of trace heavy metal ions (mercury and lead) in future treatment of wastewater.
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
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Lijin Huang,Qin Shuai
Construction of adsorbents with specific porous structure and heteroatom doping is significant for enhancing adsorption performance toward the contaminants. However, it is still a crucial task for selective adsorption with high affinity and fast uptake kinetics. Herein, we present a facile and cost-effective postsynthesis modification approach to fabricate a novel effective sulfur-doped magnetic amide-linked organic polymer (S-MAOP), where AOP is chemically anchored on the surface of NH2-functionalized magnetic nanoparticles. The thionation process, e.g., transforming the amide group (−C═O–NH−) into the thioamide group (−C═S–NH−), was illustrated by treating the MAOP with Lawesson’s reagent. The resultant S-MAOP exhibited much higher adsorption selectivity and affinity for Hg(II) uptake from water solution than the initial MAOP due to introduction of thioamide groups in the network. In addition, by covalently anchoring polymer networks onto magnetic nanoparticles, recovery and regeneration of S-MAOP were greatly facilitated due to its good superparamagnetism. Furthermore, it also showed superior stability, of which the adsorption capacity was well maintained even after 5 cycles. The remarkable adsorption performance, good cycling stability, and cost-efficient synthesis make S-MAOP a desirable adsorbent for contaminant removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
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