International Journal of Electrochemical Science
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2023
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IF 1.5
Yiting Chen,Dechun Fan,Lu Huang,Yanxia Li,Zhenli Qiu,Chen Feng
The malachite green (MG) has been widely used in the aquaculture and textile industry as drugs and dyes, respectively. In recent years, it has been found that MG has side effects such as carcinogenicity, teratogenicity and mutagenesis. So it becomes particularly important to degrade MG for these industries. In this paper, a set of equipment using FTO conductive glass was developed for degradation of MG. Several factors affecting the efficiency of electrochemical degradation, including the solution of pH, electrolyte, applied current density and degradation time were investigated. Based on the results of single-factor experiment, the response surface methodology (RSM) was used for optimal conditions. The degradation rate of MG reaches above 98% by electrolysis in 6.56 g/L NaCl (pH 8.84) solution with current density as 8.61 mA/cm 2 for 20 min. The degradation process was preliminarily investigated by ultraviolet-visible(UV-vis) spectroscopy, fluorescence spectrometry, and total organic carbon analysis. The equipment and operation is simple, therefore could be used for the degradation of wastewater yielded during production.
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DIAMOND AND RELATED MATERIALS
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2025
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IF 5.1
Zheng Guo,Hekai Zhang,Yunfei Song,Minghuan Wang,Jiying Wang,Qing Miao,Peng Wei,Li Yin
The development of efficient adsorbents for removing toxic organic dyes from wastewater remains a critical challenge in environmental remediation. Herein, novel carbon nanofibers (CNFs) supported ZIF-8 hybrid composite (CNFs@ZIF-8) was synthesized via an in-situ growth method and evaluated for its malachite green (MG) adsorption performance. The composite exhibited a porous structure with a high specific surface area (1154.18 m 2 /g) and abundant functional groups, enabling exceptional adsorption capacity (2384.13 mg/g). Systematic studies revealed that the adsorption mechanism involved synergistic electrostatic interactions, π-π stacking, with the process fitting the Langmuir isotherm and pseudo-second-order kinetic models. Remarkably, CNFs@ZIF-8 demonstrated pH-responsive selectivity toward cationic dyes, achieving removal efficiencies of >90 % for MG, methylene blue (MB), and rhodamine B (RhB), while showing minimal affinity for anionic methyl orange (MO). Thermodynamic analysis confirmed the spontaneous (ΔG 0 < 0) and endothermic (ΔH 0 = 71.49 kJ/mol) nature of adsorption. The composite maintained structural stability over five regeneration cycles, highlighting its potential for sustainable wastewater treatment. This work provides a strategy to overcome the limitations of pure MOFs by integrating carbon substrates, offering a multifunctional adsorbent with scalable applications in addressing complex dye-polluted effluents.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Tao Zhang,Xiaoying Jin,Gary Owens,Zuliang Chen
Dye-contaminated wastewater resulting from rapid industrialization and urbanization is a global problem. In this study, a ZIF-8@Fe/Ni sample was synthesized for the removal of malachite green (MG), removing more than 99% of an initial MG concentration of 50 mg L −1 within 120 min with a 318 K adsorption capacity of 151.520 mg g −1 . To understand the dye removal mechanism based on adsorption and reduction, ZIF-8@Fe/Ni was characterized by various techniques. XRD showed that the ZIF-8@Fe/Ni composite had a characteristic peak attributable to Fe/Ni around 44.8°, where the presence of Fe/Ni did not affect the structure of ZIF-8. SEM confirmed that ZIF-8@Fe/Ni was successfully prepared, while XRD and FTIR revealed that the structure of ZIF-8@Fe/Ni remained stable following the introduction of Fe/Ni. XPS showed that while Fe/Ni nanoparticles existed in ZIF-8-Fe/Ni, partial oxidation also occurred. GC–MS demonstrated the creation of two major MG degradation products, (4-aminophenyl) (phenyl) methanone and 4-aminophenol. While the overall adsorption process of MG to ZIF-8@Fe/Ni conformed to pseudo-second-order kinetics, degradation followed pseudo-first-order reduction kinetics. When applied to the remediation of wastewater, ZIF-8@Fe/Ni removed 92% of MG. Overall, this study demonstrated that ZIF-8@Fe/Ni could be a promising material for the treatment of wastewater.
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CHEMOSPHERE
·
2020
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IF 5.778
Lujian Lin,Shuai Tang,Xuesong Wang,Xuan Sun,Anqi Yu
The role of microplastics (MPs) as a carrier of pollutants in water environment is an emerging issue; however, information regarding the underlying mechanisms for malachite green (MG) and Pb(II) adsorption onto hexabromocyclododecane (HBCD)-polystyrene (PS) composites MPs (HBCD-PS MPs) is still lacking. In this study, the adsorption behaviors and mechanisms of MG and Pb(II) onto PS and HBCD-PS MPs were investigated in batch adsorption experiments. The amounts of MG and Pb(II) adsorbed onto PS MPs were negligible while the presence of HBCD significantly enhanced the adsorption of MG and Pb(II) onto HBCD-PS MPs. The results of intra-particle and film diffusion model confirmed that the adsorption of MG and Pb(II) onto HBCD-PS MPs was dominated by intra-particle diffusion. The maximum adsorption amount ( q m ) of Pb(II) and MG onto HBCD-PS MPs followed the sequence of Pb(II) (3.33 μmol g −1 ) > MG (1.87 μmol g −1 ). In binary systems, MG and Pb(II) showed competitive adsorption onto HBCD-PS MPs, and Pb(II) exhibited relatively higher affinity to be adsorbed onto HBCD-PS MPs. Solution pH and salinity played a crucial role in the adsorption process. XPS analysis suggested that the –Br participated in the adsorption process as an electron-withdrawing group. Overall, electrostatic interaction regulated the adsorption of MG and Pb(II) onto HBCD-PS MPs. Results from this study demonstrated that HBCD could enhance the role of MPs in the MG and Pb(II) migration by changing their adsorption behavior onto MPs.
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WATER RESEARCH
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2018
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IF 7.051
Beibei Li,Li Gan,Gary Owens,Zuliang Chen
The development of new biomaterials for the remove of organic contaminants from wastewater has attracted much attention over the few past years. One of the most cost-effective approaches is to produce new high value biomaterials from low value solid agricultural biowastes. In this work, sugarcane bagasse and agricultural waste rich in reducing sugars, acted as both a green bioreductant for graphene oxide (GO) and a sustainable supporter for the immobilization of Burkholderia cepacia . Therefore, this new biomaterial which contained both reduced graphene oxide (RGO) and Burkholderia cepacia , was cable of initial adsorption of malachite green (MG) and its subsequent biodegradation. After 60 h, immobilized Burkholderia cepacia degraded more MG (98.5%) than a cell cultured Burkholderia cepacia (87.7%) alone. Raman spectroscopy confirmed that GO was successfully reduced by bagasse and that consequently a composite (B-RGO) was prepared. SEM indicated that Burkholderia cepacia was well immobilized and kinetics studies showed that the adsorption of MG onto the developed composite fitted a pseudo-second order kinetics model (R 2 > 0.99). Biodegradation of MG, was confirmed by the detection of appropriate degradation products such as N, N-dimethylaniline and 4-(Dimethylamino) benzophenone using GC-MS, UV and FT-IR, and via best fit first-order biodegration kinetics. Furthermore, a response surface methodology (RSM) was applied to the removal process by varying four independent parameters using a Box-Behnken design (BBD). Optimum MG removal (99.3%) was achieved at 31.5 °C, with an initial MG concentration of 114.5 mg L −1 , initial pH of 5.85, and an adsorbent dosage of 0.11 g L −1 . The excellent removal efficiency indicated that agricultural waste derived reduced graphene oxide bio-adsorbents have significant potential for the removal of dyes such as MG from industrial wastewaters .
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FOOD AND AGRICULTURAL IMMUNOLOGY
·
2015
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IF 0.986
Naifeng Xu,Liqiang Li,Shanshan Song,Liguang Xu,Hua Kuang,Chuanlai Xu
We developed a sensitive lateral flow immunoassay (LFI) for the detection of total malachite green (MG) residues in fish tissues. LFI was based on a colloidal gold nanoparticle-labeled monoclonal antibody against MG , which was generated by fast immunization of carboxymalachite green-bovine serum albumin. The half-maximum inhibition concentration (IC50) of MG monoclonal antibody (MG mAb) was 0.057 ng/ml with a linear range of 0.020–0.162 ng/ml. Following the optimization of LFI, a qualitatively visual limit of detection of 1 ng/ml and a semi-quantitatively limit of detection of 0.418 ng/ml (IC50 of the calibration curve) were obtained for total MG residues in 8 min. Cross-reactivity with most MG analogs was negligible, expect with crystal violet (CV; 78.6% cross-reactivity). LFI is a novel and sensitive assay based on MG mAb that has applications for the rapid detection of total MG and CV in fish products.
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MICROCHIMICA ACTA
·
2015
·Vol. 182
·期 9
·1791-1796
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IF 3.741
Li Lu,Lin Zheng-zhong,Chen Xiao-mei,Zhang Hong-yuan,Lin Yi-dong,Lai Zhu-zhi,Huang Zhi-yong
Molecularly imprinted polymer (MIP) particles for malachite green (MG) were prepared by emulsion polymerization using methacrylic acid as the functional monomer, ethylene glycol dimethacrylate as the cross-linker, and a combination of Span-80 and Tween-80 as an emulsifier. The MIP particles were characterized by SEM micrographs and FT-IR spectra. Their binding capacity for MG was evaluated based on kinetic and isothermal adsorption experiments and compared to non-imprinted polymer particles. Analytical figures of merit include an adsorption equilibrium time of 15 min, an adsorption capacity of 1.9 mg∙g‾ 1 in acetonitrile-water (20:80), and an imprinting factor of 1.85. The MIP particles were successfully applied to the extraction of MG from fish samples spiked with MG and the other interfering substances prior to its determination of MG by HPLC. Spiked samples gave recoveries of MG that ranged from 86 to 104 %, much higher than that of the other interfering substance.
Molecularly imprinted polymer particles for malachite green (MG) were prepared by emulsion polymerization. They show adsorption capacity of 1.9 mg∙g‾¹ with imprinting factor of 1.85, and were successfully applied to the extraction of MG from spiked fish samples.
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Micro & Nano Letters
·
2015
·Vol. 10
·期 9
·447-451
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IF 0.853
Yaping Zhong,Xue Wang,Yu He,Yili Ge,Gongwu Song
Graphene/silica magnetic nanocomposites are synthesised and introduced as new and reusable adsorbents for rapid and high-efficiency preconcentraton trace amounts of dye pollutants in water. This method is simple, fast, cheap and non-toxic. The optimum adsorption conditions for the preconcentraton of crystal violet (CV) and malachite green (MG) are investigated and the adsorption mechanisms are also discussed. The regeneration and reuse experiments showed the good reusability of the as-prepared adsorbent. In addition, this method was successfully applied to the preconcentraton of trace amounts of MG and CV from water samples, which presages more opportunities for application in environmental and material sciences.
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ANALYTICA CHIMICA ACTA
·
2015
·
IF 4.513
Hui Zhao,Yong-Sheng Wang,Xian Tang,Bin Zhou,Jin-Hua Xue,Hui Liu,Shan-Du Liu,Jin-Xiu Cao,Ming-Hui Li,Si-Han Chen
We report on an enzyme-free and label-free strategy for the ultrasensitive determination of adenosine. A novel multipurpose adenosine aptamer (MAAP) is designed, which serves as an effective target recognition probe and a capture probe for malachite green. In the presence of adenosine, the conformation of the MAAP is converted from a hairpin structure to a G-quadruplex. Upon addition of malachite green into this solution, a noticeable enhancement of resonance light scattering was observed. The signal response is directly proportional to the concentration of adenosine ranging from 75 pM to 2.2 nM with a detection limit of 23 pM, which was 100–10,000 folds lower than those obtained by previous reported methods. Moreover, this strategy has been applied successfully for detecting adenosine in human urine and blood samples, further proving its reliability. The mechanism of adenosine inducing MAAP to form a G-quadruplex was demonstrated by a series of control experiments. Such a MAAP probe can also be used to other strategies such as fluorescence or spectrophotometric ones. We suppose that this strategy can be expanded to develop a universal analytical platform for various target molecules in the biomedical field and clinical diagnosis.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2016
·
IF 2.857
Feng Wang,Hong Wang,Yu-Dong Shen,Yong-Jun Li,Jie-Xian Dong,Zhen-Lin Xu,Jin-Yi Yang,Yuan-Ming Sun,Zhi-Li Xiao
A new multianalyte immunoassay was designed to screen furaltadone metabolite 5-morpholinomethyl-3-amino-2-oxazolidone (AMOZ), malachite green (MG), and leucomalachite green (LMG) in aquatic products using a bispecific monoclonal antibody (BsMAb). Gradient drug mutagenesis methods were separately used to prepare an anti-3-nitrobenzaldehyde-derivatized AMOZ (3-NPAMOZ) hybridoma cell line that was hypoxanthine-guanine-phosphoribosyltransferase (HGRPT) deficient and an anti-LMG hybridoma cell line that was thymidine kinase (TK) deficient. BsMAb recognizing 3-NPAMOZ and LMG was generated using hybrid–hybridomas of HGRPT and TK deficient cell lines. For AMOZ and LMG, respectively, the BsMAb-based indirect competitive ELSIA (ic-ELISA) values of 1.7 ng/mL and 45.3 ng/mL and detection limits of 0.2 ng/mL and 4.8 ng/mL. To establish the ic-ELISA, 3-NPAMOZ derivatized from AMOZ with 3-nitrobenzaldehyde and LMG reduced from MG by potassium borohydride was recognized by BsMAb. Recoveries of AMOZ, MG, and LMG in aquatic products were satisfactory and correlated with HPLC analysis. Thus, the multianalyte ic-ELISA is suitable for rapid quantification of AMOZ, MG, and LMG in aquatic products.
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FOOD CHEMISTRY
·
2017
·
IF 4.529
Le Wu,Zheng-zhong Lin,Hui-ping Zhong,Ai-hong Peng,Xiao-mei Chen,Zhi-yong Huang
A sensitive fluorescence sensor for the detection of malachite green (MG) was fabricated by grafting molecularly imprinted polymers (MIPs) onto the surface of CdTe quantum dots (QDs). The MIP-coated QDs were synthesized via a reverse microemulsion method using (3-aminopropyl)triethoxysilane (APTES) and tetraethyl orthosilicate (TEOS) as functional monomer and cross-linker, respectively. The optimum molar ratio of MG, functional monomer and cross-linker was 1:3:10. The MIP-coated QDs exhibited uniform spheres with diameter around 49 nm and excellent fluorescence emission at λ ex 370 nm. A linear relationship with two segments between the relative fluorescence intensities and the MG concentrations ranging from 0.08 to 20 μmol·L −1 could be obtained with a detection limit of 12 μg·kg −1 . The fluorescent probe was successfully applied to the determination of MG in fish samples with the spiked recoveries ranging from 94.3% to 109.5% which were in accordance with those of the measurement by HPLC-UV.
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Journal of Cleaner Production
·
2024
·
IF 9.7
Kai-Ning Zhang,Ze-Le Lei,Qiu-Feng Lü
The intensification of industrial production has led to a sharp increase in the discharge of toxic organic chemicals and wastewater from printing and dyeing industry. In this study, flower-like ZnO modified TiO 2 @Ti 3 C 2 T x composites (ZnO/TiO 2 @Ti 3 C 2 T x ) were prepared by in-situ oxidation solvothermal method from zinc nitrate hexahydrate and tetramethylammonium hydroxide intercalated Ti 3 C 2 T x . During the solvothermal processes, sodium hydroxide acted as an etchant to further exfoliated the accordion-like Ti 3 C 2 T x into single or few-layer; and at the same time, TiO 2 was formed in-situ on the surface of Ti 3 C 2 T x with simultaneous deposition of flower-like ZnO. The layer structural Ti 3 C 2 T x facilitates the loading and dispersion of ZnO and TiO 2 on its surface. After the in-situ oxidation by solvothermal method, TiO 2 was evenly distributed on the surface of Ti 3 C 2 T x , adjusting the functional groups on the surface of the ZnO/TiO 2 @Ti 3 C 2 T x composite, and improving its adsorption performance. ZnO/TiO 2 @Ti 3 C 2 T x can be used as an efficient adsorbent for malachite green with a high maximum adsorption capacity of 1232.7 mg g −1 , which is higher than that of TiO 2 @Ti 3 C 2 T x (628.57 mg g −1 ). Moreover, a superhydrophilic and underwater superoleophobic ZnO/TiO 2 @Ti 3 C 2 T x @PU sponge was prepared by loading ZnO/TiO 2 @Ti 3 C 2 T x onto polyurethane (PU) sponge. The introduction of ZnO enhances the surface roughness of the ZnO/TiO 2 @Ti 3 C 2 T x @PU sponge, which can effectively separate six oil-water mixtures, and has a high separation flux of 171784 L m −2 h −1 and separation efficiency of 99.6% for cyclohexane-water mixture.
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