Catalysts
·
2017
·Vol. 7
·期 12
·362
·
IF 3.082
Chunjing Hao,Zehua Xiao,Di Xu,Chengbo Zhang,Jian Qiu,Kefu Liu
Textile dyes are some of the most refractory organic compounds in the environment due to their complex and various structure. An integrated resin adsorption/Dielectric Barrier Discharge (DBD) plasma regeneration was proposed to treat the indigo carmine solution. It is the first time to report ectopic regeneration of the saturated resins by non-thermal Dielectric Barrier Discharge. The adsorption/desorption efficiency, surface functional groups, structural properties, regeneration efficiency, and the intermediate products between gas and liquid phase before and after treatment were investigated. The results showed that DBD plasma could maintain the efficient adsorption performance of resins while degrading the indigo carmine adsorbed by resins. The degradation rate of indigo carmine reached 88% and the regeneration efficiency (RE) can be maintained above 85% after multi-successive regeneration cycles. The indigo carmine contaminants were decomposed by a variety of reactive radicals leading to fracture of exocyclic C=C bond, which could cause decoloration of dye solution. Based on above results, a possible degradation pathway for the indigo carmine by resin adsorption/DBD plasma treatment was proposed.Keywords:indigo carmine;resin;Dielectric Barrier Discharge;adsorption;regeneration
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2015
·
IF 2.723
Yichen Hu,Xiao Chen,Zhiqiang Liu,Gejiao Wang,Shuijiao Liao
Indigo carmine (IC) is one of the oldest, most important, and highly toxic dyes which is released from the effluents of many industries and results in serious pollution in water. In this study, the biogenic Mn oxides were activated by NaOH and then heated for 3 h at 350 °C to produce activated carbon doped with Mn oxide (Bio-MnO x -C), which were produced by culturing Mn (II)-oxidizing bacterial strain MnI7-9 in liquid A medium at 28 °C with 10 mmol/L MnCl 2 . Bio-MnO x -C was characterized by SEM, TEM , IR , XPS , XRD , etc . It contained C, O, and Mn which comprised Mn (IV) and Mn (III) valence states at a ratio of 3.81:1. It had poorly crystalline ε-MnO 2 with a specific surface area of 130.94 m 2 /g. A total of 0.1 g Bio-MnO x -C could remove 45.95 g IC from 500 mg/L IC solution after 0.5 h contact time. IC removal by Bio-MnO x -C included a rapid oxidation reaction and the removal reaction followed second-order kinetic equation . These results confirmed that Bio-MnO x -C could be a potential material for wastewater remediation.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
Applied Catalysis O: Open
·
2024
·
IF 0
Yongsi Jiao,Cunjun Li,Yanqi Xu,Limei He,Linjiang Wang
Photodegradation of indigo carmine (IC) in wastewater has received much attention in recent decades. However, the current photocatalysts used for IC photodegradation suffer from an unsatisfactory efficiency due to low yield of reactive species. Herein, a P-modified biochar/g-C 3 N 4 (P-BC/CN) photocatalyst was fabricated by mechanochemical method using P-modified biochar and g-C 3 N 4 as precursors. It is discovered that P N bonds were constructed between P-modified biochar and g-C 3 N 4 , and these bonds served as the active sites to promote the generation of •O 2 − during the photodegradation process. The biochar component in P-BC/CN composite is conducive to transfer the photogenerated carriers, thereby avoiding their recombination. The photodegradation experiment showed that the P-BC/CN composite exhibits an impressive photodegradation performance towards IC ( C 0 = 50 mg/L) with a photodegradation rate of 95.3% in 120 min. This work provides a green and efficient method to design biochar-based photocatalyst with P N active sites for advanced wastewater purification.
研究领域:
环境科学
·
材料科学
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化学工程
✓ 已验证
DOI
Journal of Chemistry
·
2015
·Vol. 2015
·期 1
·670194
·
IF 0.772
Youxun Liu,Mingyang Yan,Yuanyuan Geng,Juan Huang
Efficient reuse and regeneration of spent mediators are highly desired for many of the laccases’ biotechnology applications. This investigation demonstrates that a redox mediator 2,2′-azino-bis-(3-ethylbenzothiazoline)-6-sulfonic acid (ABTS) covalently attached to silica nanoparticles (SNPs) effectively mediated dye decolorization catalyzed by laccase. Characteristics of ABTS-modified silica nanoparticles (ABTS-SNPs) were researched by scanning electron microscopy and Fourier-transformed infrared spectroscopy. When ABTS and ABTS-SNPs were used as laccase mediators, the decolorization yields of 96 and 95% were, respectively, obtained for indigo carmine dye. The results suggest that ABTS immobilized on SNPs can be used as laccase mediators as they retain almost the same efficiency as the free ABTS. The oxidized ABTS-SNPs were regenerated by their reduction reaction with ascorbic acid. Decolorization efficiency of regenerated ABTS-SNPs and their initial forms were found to be almost equivalent. Six reuse cycles for spent ABTS-SNPs were run for the treatment of indigo carmine, providing decolorization yields of 96–77%. Compared with free mediator, the immobilized mediators have the advantage of being easily recovered, regenerated, and reused making the whole process environmentally friendly.
研究领域:
环境生物技术
·
纳米生物技术
·
酶工程
·
污染物降解
·
绿色化学
✓ 已验证
DOI
高影响因子
QUIMICA NOVA
·
2016
·Vol. 39
·期 8
·956-961
·
IF 0.617
Zhang Xiuli,Yin Yidong,Sun Zhibo,Du Yingqiu,Ma Shichao,Wu Yan
Chromium and sulfur co-doped nanometer TiO2 hollow glass microspheres (Cr/S/TiO2-HGM) were synthesized by a sol-gel method. Characterization used X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), N2 adsorption-desorption (Brunauer-Emmett-Teller (BET) measurements) and UV-Vis diffuse reflectance spectroscopy. The photocatalytic activity was evaluated by photodegradation of indigo carmine in an aqueous solution under visible light irradiation. The results indicated that the Cr/S/TiO2 containing 0.60% (atomic ratio) chromium and 1.2% (atomic ratio) sulfur calcined at 500 ºC for 2 h had high catalytic efficiency under visible light irradiation. The floating Cr/S/TiO2-HGM catalyst had greater photocatalytic activity than Cr/S/TiO2 powder. Therefore, Cr/S/TiO2-HGM is a promising, high-performing, visible-light-driven, and more reusable photocatalyst.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 19
·6648
·
IF 3.748
Jingfei Luan,Bowen Niu,Bingbing Ma,Guangmin Yang,Wenlu Liu
In2YSbO7and In2YSbO7/BiSnSbO6heterojunction photocatalyst were prepared by a solvothermal method for the first time. The structural characteristics of In2YSbO7had been represented. The outcomes showed that In2YSbO7crystallized well and possessed pyrochlore constitution, a stable cubic crystal system and space groupFd3m. The lattice parameter of In2YSbO7was discovered to be a = 11.102698 Å and the band gap energy of In2YSbO7was discovered to be 2.68 eV, separately. After visible-light irradiation of 120 minutes (VLGI-120M), the removal rate (ROR) of indigo carmine (IC) reached 99.42% with In2YSbO7/BiSnSbO6heterojunction (IBH) as a photocatalyst. The ROR of total organic carbon (TOC) reached 93.10% with IBH as a photocatalyst after VLGI-120M. Additionally, the dynamics constant k which was taken from the dynamic curve toward (DCT) IC density and VLGI time with IBH as a catalyst reached 0.02950 min−1. The dynamics constant k which came from the DCT TOC density and VLGI time with IBH as a photocatalyst reached 0.01783 min−1. The photocatalytic degradation of IC in dye wastewater (DW) with IBH as a photocatalyst under VLGI was in accordance with the first-order kinetic curves. IBH was used to degrade IC in DW for three cycles of experiments under VLGI, and the ROR of IC reached 98.74%, 96.89% and 94.88%, respectively, after VLGI-120M, indicating that IBH had high stability. Compared with superoxide anions or holes, hydroxyl radicals possessed the largest oxidative ability for removing IC in DW, as demonstrated by experiments with the addition of trapping agents. Lastly, the probable degradation mechanism and degradation pathway of IC were revealed in detail. The results showed that a visible-light-responsive heterojunction photocatalyst which possessed high catalytic activity and a photocatalytic reaction system which could effectively remove IC in DW were obtained. This work provided a fresh scientific research idea for improving the performance of a single catalyst.Keywords:In2YSbO7;In2YSbO7/BiSnSbO6heterojunction photocatalyst;indigo carmine;photocatalytic degradation;visible-light irradiation;N-doped TiO2
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 27
·22250-22268
·
IF 3.289
Z. Zhang,N. C. Tian,X. D. Huang,W. Shang,L. Wu
The synergistic corrosion inhibition effect of indigo carmine and three kinds of cationic organic compounds on 1045 carbon steel (CS) in 0.5 M HCl solution is reported. Electrochemical measurements showed that these three cationic organic compounds combined with indigo carmine reduce the speed of corrosion on 1045 CS and act as effective inhibitors. The combination of indigo carmine with BAB resulted in the best synergistic corrosion inhibition effect (S = 17.14), and the best inhibition efficiency (95.0%). SEM images and XPS data of the corroded steel surfaces suggested that the indigo disulphonate anion and organic cation could be simultaneously adsorbed on the CS surface to inhibit the corrosion of iron. The synergistic inhibition mechanism was investigated by dynamic simulations using quantum chemistry.
研究领域:
材料腐蚀与防护
·
物理化学
·
金属材料科学
·
表面科学
·
电化学
·
量子化学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Chong Chen,Yufei Liu,Kai Zhang,Qiao Fan,Tingting Luo,Shigui Peng,Lanlan Wei,Yucheng Yin,Min He,Jie Yu
Human sweat pH closely correlates with physiological states, making its monitoring vital for health maintenance and personalized medicine. A flexible electrochemical sweat pH sensor was fabricated using a poly(3,4-ethylenedioxythiophene):indigo carmine/screen-printed carbon electrode (PEDOT:IC/SPCE). The sensing performance of pH sensor is optimized by adjusting the structure of functional coating through voltage design in electropolymerization process. The results show that the pH sensor prepared under 1.0 V constant voltage polymerization has the best performance. The sensor has a wide detection range (pH 2–11), high sensitivity (65 mV/pH) and good accuracy (deviation ≤ ±0.25 pH vs. commercial pH meter). Comprehensive stability tests were conducted, including repeatability, continuous operation, anti-interference ion resistance, storage stability, and mechanical bending tests. This work demonstrates the potential of wearable electrochemical sensors for health management applications.
研究领域:
生物传感器
·
电化学
·
可穿戴电子设备
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
BIOPROCESS AND BIOSYSTEMS ENGINEERING
·
2024
·Vol. 47
·期 3
·355-366
·
IF 3.5
Duan Xiaoyan,Pi Qian,Tang Lei
Dyes in wastewater have adverse effects on the environment and human health. Dye-decolorizing peroxidase (DyP) is a promising biocatalyst to dyes degradation, but the decolorization rates varied greatly which influencing factors and mechanisms remain to be fully disclosed. To explore an effective decolorizing approach, we have studied a DyP from Rhodococcus jostii ( Rh DyPB) which was overexpressed in Escherichia coli to decolorize four kinds of dyes, Reactive blue 19, Eosin Y, Indigo carmine, and Malachite green. We found the decolorization rates of the dyes by purified Rh DyPB were all pH-dependent and the highest one was 94.4% of Malachite green at pH 6.0. ESI–MS analysis of intermediates in the decolorization process of Reactive blue 19 proved the degradation was due to peroxidase catalysis. Molecular docking predicated the interaction of Rh DyPB with dyes, and a radical transfer reaction. In addition, we performed decolorization of dyes with whole E. coli cell with and without expressing Rh DyPB. It was found that decolorization of dyes by E. coli cell was due to both cell absorption and degradation, and Rh DyPB expression improved the degradation rates towards Reactive blue 19, Indigo carmine and Malachite green. The effective decolorization of Malachite green and the successful application of whole DyP-overexpressed cells in dye decolorization is conducive to the bioremediation of dye-containing wastewaters by DyPs. Graphical abstract
研究领域:
环境生物技术
·
酶催化
·
生物修复
·
蛋白质工程
·
废水处理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）