SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Ming Chen,Jinhui Liu,Yuke Kong,Wenxiu Zheng,Yong Wang,Xueyan Zou,Yuguang Wang,Yangyang Wang
Co-contamination of wastewater with toxic metals and dyes pose a severe threat to ecosystems and human health. In the present study, a novel surface-etched mercapto-functionalized porous nanosilica microsphere (E-MPNS) was prepared for the simultaneous removal of Cd(II) and malachite green (MG) from wastewater. The effects of various environmental factors on Cd(II) and MG adsorption and their adsorption mechanisms are elucidated in detail. The results showed that the E-MPNS exhibited a relatively higher specific surface area (272.06 m 2 /g). The maximum adsorption capacities of E-MPNS for Cd(II) and MG were 436.68 and 3831.08 mg/g in the single system and 433.66 and 1932.18 mg/g in the binary system, respectively. The adsorption mechanisms of E-MPNS were surface complexation and ion exchange for Cd(II) and hydrogen bonding and electrostatic attraction for MG. Density functional theory calculation revealed that the E-MPNS-Cd(II) complex had a higher molecular stability and lower reactivity compared with that of E-MPNS-MG, and the energy gaps of the E-MPNS-Cd(II) (1.15 eV for SH and 0.71 eV for OH) were markedly larger than those of the E-MPNS-MG (0.69 eV for SH and 0.52 eV for OH). Moreover, the E-MPNS exhibited good biocompatibility with bacteria and plants. These results indicate that the E-MPNS is a promising adsorbent for remediating of Cd(II) and MG co-contaminated wastewater.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiayu Feng,Ruoxu Liu,Xuejin Yang,Shuo Cui,Rui Cao,Ping Ning,Fang Wang,Zibin Pan,Lijuan Jia
Efficient removal of the highly toxic gas phosphine (PH 3 ) from various exhaust gases is a major challenge. To address this, we developed a cost-effective NiO/TiO 2 adsorbent (Ni X /TiO 2 ) via facile impregnation, achieving efficient anaerobic PH 3 removal at a low temperature (350 °C) with an exceptional breakthrough capacity of 232.23 mg(PH 3 ) g −1 . Characterization revealed that superior performance stems from abundant surface basic sites, developed porosity, and strong NiO-TiO 2 interfacial interactions promoting PH 3 adsorption and dissociation. During PH 3 capture, phosphorus incorporation transforms active NiO into Ni 2 P species, leading to adsorbent deactivation. Crucially, recognizing the photocatalytic potential of both TiO 2 and Ni 2 P, we repurposed the spent adsorbent as a Ni 2 P/TiO 2 heterojunction photocatalyst. Proof-of-concept experiments demonstrated its high efficacy in visible-light-driven wastewater treatment, achieving 91 % degradation of malachite green (MG). This work advances PH 3 purification technology while establishing a sustainable circular economy strategy via repurposing deactivated adsorbents into photocatalysts, aligning with resource conservation and recycling.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Tianxing Fang,Qingyi Wei,Erwen Wu,Hongbin Pu
Malachite green (MG), with teratogenic and reproductive toxicity, is widely misused as an antimicrobial agent, posing a serious threat to animal and human health. Therefore, this study developed a novel recyclable Surface-enhanced Raman scattering (SERS) hydrogel substrate, TiO 2 /MXene/PAA-PAM@AuNPs (TMPA), by forming a dual hydrogen-bond network using a PAA-PAM hydrogel matrix with TiO 2 /MXene and embedding AuNPs, for detecting MG residues in aquatic products. This hydrogel exhibits high sensitivity, with a detection limit for MG of 8.13 × 10 −6 mg/L. Additionally, it can completely degrade surface-adsorbed MG within 60 min under light irradiation, achieving self-cleaning and enabling reuse for more than seven cycles, and can be stored for over 50 days while maintaining its SERS activity due to the support and preservation provided by the hydrogel network. Additionally, this substrate can rapidly detect MG residues on or within fish, offering a new strategy for monitoring MG residues in aquatic products.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yupeng Sun,Kaihui Zhou,Yuxin Wang,Ye Lin,Weiran Wang,Xue Xiong,Xiangru Zhao,Huinan Cui,Min Liang,Qiao Wang,Shengnan Yang,Li Li
Rapid, low-cost, and in-situ detection of illegal residues on aquatic product surfaces remains a significant challenge. Herein, we developed a versatile surface-enhanced Raman scattering (SERS) sensor by integrating instant interfacial self-assembled silver nanostar film onto flexible polytetrafluoroethylene filter membrane (AgNS/PTFE) for sensitive detection of malachite green (MG) and crystal violet (CV) in crayfish. The entire process, from room-temperature substrate preparation to detection completion, takes less than 20 min. The AgNS/PTFE flexible substrate not only provides excellent hydrophobicity for signal enhancement with minimal sample volumes (2 μL) but also ensures good uniformity, resulting in a homogeneous and dense distribution of SERS-active hot spots with superior anti-interference properties and mechanical durability. By simple “drop/wipe” operations and data visualization treatment, this method achieved detection limits as low as 10 pg/mL for MG and 7 pg/mL for CV, with in-situ analysis in spiked and actual crayfish samples, demonstrating significant potential for food safety applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2020
·
IF 5.647
Yiqiao Xie,Jiawei Huang,Haojie Dong,Tong Wu,Ling Yu,Guoqiang Liu,Yang Yu
Dye decolorization is of crucial concern for effectively treating dye wastewater. In this study, rapid and effective decolorization of malachite green cationic dye was achieved by tea polyphenols and ferric ions under moderate conditions. Approximately 96.2% of decolorization efficiency could be obtained within the first 10 min at the initial dye concentration of 50 mg/L. The proposed method can perform excellently in a wide pH range of 5–9 and decolorization kinetics of malachite green under different solution pH were well fitted by the pseudo-second-order model. After the decolorization, only a slight reduction of tea polyphenols was observed, while the strength of peaks assigned to nitrogen-containing groups was significantly weakened, indicating that the N-demethylation reaction might occur during the decolorization process. The nucleophilic attack of deprotonated hydroxyl groups of tea polyphenols was proposed as the decolorization mechanism. The presence of ferric ions at an appropriate dosage could promote the deprotonation process and therefore enhance decolorization efficiency, while excess ferric ions in solution might compete with malachite green dye towards reductive sites on tea polyphenols. The findings from this study provided an economical and environmentally friendly technique for the effective decolorization of dye wastewater.
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Min Chen,Yiqun Huang,Junjian Miao,Yuxia Fan,Keqiang Lai
Concerns about food safety have been arisen due to the improper use of chemicals in aquaculture. Malachite green (MG) has attracted attention because of its illegal usage and its potential negative impacts on the environment and public health. Surface-enhanced Raman scattering (SERS) platforms coupled with different SERS substrates have been employed for rapid analysis of MG residues in food. However, the most commonly used SERS substrates were non-reusable and showed limited detection sensitivity. In this study, a novel SERS substrate with a good recyclability and a high sensitivity was prepared by electrostatically assembling together a metal–organic framework material called materials of institute lavoisie-100(Fe) (MIL-100(Fe)) and Au NPs. The lowest detectable concentration of MG was 10 −13 M based on the optimal substrate. The SERS sensor was applied for the detection of the trace MG in fish pond water, which was accomplished with the correlation coefficients R 2 = 0.991–0.996 in a concentration range of 10 −6 –10 −13 M. Moreover, MIL-100(Fe)/Au was recycled at least five times, realizing a “detection to degradation”, showing great potential for food contamination monitoring due to its distinguished performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Shiqing Luo,Xiaojie Sun,Lifang Zhang,Yanming Miao,Guiqin Yan
The photoluminescent properties of Mn-doped ZnS quantum dots were fully exploited, and room-temperature phosphorescence (RTP)-ratiometric fluorescence (RF) magnetic mesoporous molecularly imprinted polymers (PFMM-MIPs) were prepared by integrating molecular imprinting technology. RTP was used to detect malachite green (MG). The fluorescence at 420 nm and the peak at 590 nm in the fluorescence mode were used as the response reference signals respectively to detect tartrazine (TZ). The linear responsive range and detection limit of MG were 0.01–150 μM and 4.3 nM, and these of TZ were 0.05–80 μM and 23.7 nM. RTP, which can avoid the interference of background fluorescence, and RF with self-calibration ability can both largely weaken the matrix effect. This work enables single-probe-type MIPs to achieve dual-target analysis via RTP and RF. This method provides excellent sensitivity, specificity, recovery and recyclability, and is expected to be prospectively applied in the fields of food, environment and biological analyses.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 22
·5353-5363
·
IF 4.3
Yu Yang,Pai Nanya,Chen Xiaoya,Wang Baoling,Gao Shulin,Ge Dandan
A new type of hexafluorobutanol (HFB) primary alcohol ethoxylate (AEO)-based supramolecular solvent (SUPRAS) with density higher than water was prepared for the first time. HFB acted as AEO micelle-forming agent and density-regulating agent for SUPRAS formation. The prepared SUPARS was applied as extraction solvent for vortex-assisted direct microextraction of malachite green (MG) and crystal violet (CV) from lake sediment followed by high-performance liquid chromatographic determination. In the present work, SUPRASs prepared from AEO with different carbon chains as the amphiphiles and various coacervation agents were investigated. SUPARS formed from MOA-3 and HFB provided better extraction efficiency in comparison with other SUPRASs. Parameters influencing the extraction recovery of target analytes including the type and volume of AEO, volume of HFB, and vortex time were investigated and optimized. Under optimized conditions, linearity in the range of 2.0–400 μg g −1 for MG and 2.0–500 μg g −1 for CV with a correlation coefficient higher than 0.9947 was obtained. Limits of detection of 0.5 μg g −1 and relative standard deviations in the range of 0.9–5.8% were obtained. Compared to conventional extraction techniques for analysis of analytes in solid samples, the proposed method reduced sample usage and eliminated a primary extraction process by using a toxic organic solvent. The proposed method is simple, fast, and green and can be used for the analysis of target analytes in solid samples. Graphical Abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Yuwei Hua,Donghui Xu,Zhongxiao Liu,Jie Zhou,Jiatong Han,Zhihao Lin,Dan Xu,Ge Chen,Xiaodong Huang,Jing Chen,Jun Lv,Guangyang Liu
To deal with the environmental pollution caused by dyes and heavy metals , it is vital to design and prepare adsorbents with efficient adsorption and removal capabilities for the regulated removal of contaminants in the environment. In this work, biomimetic apatite hydrogel beads inspired by the structure of petunia pollen were produced in order to efficiently remove lead ions (Pb 2+ ) and malachite green (MG) by adsorption. Utilizing an ionic cross-linking approach, magnetic hydroxyapatite nanoparticles (MHNPs) were encapsulated in sodium alginate gels to make hydrogel beads (MHSB) with the structure of petunia pollen. The MG and Pb 2+ adsorption capacities of MHNPs were 208.06 mg/g and 475.50 mg/g, respectively, demonstrating a satisfactory adsorption ability. In addition, the magnetic hydroxyapatite nanoparticles/hydrogel microspheres demonstrated effective MG and Pb 2+ adsorption and removal in mixed adsorption studies, environmental water samples, and fruit juices, as well as in real application. Due to their sound adsorption capability and stability, magnetic MHNPs and MHSB are regarded as fairly promising composite materials for the adsorption and removal of dyes and heavy metal pollutants.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Zhuxian Gao,Yuanyuan Li,Yulong Ma,Wenxin Ji,Tong Chen,Xiaoxia Ma,Hong Xu
Functionalized melamine sponge based on β-cyclodextrin (β-CD) and graphene oxide (GO) as a new solid phase extraction (SPE) adsorbent, was developed for determination of malachite green (MG) in seafood, coupled with high-performance liquid chromatography (HPLC). The obtained sponge prepared by an easy method and simple step, is placed into a syringe to enrich quickly MG. The extraction procedure was further improved by investigating the effects of the experimental parameters on pre-enrichment of MG. The present method had been successfully applied to determination of MG from crayfish and squid sample and obtained satisfied recovery value (88.6–100.8%) with coefficient of variance below 2.6–9.2% ( n = 3), which indicated that the method was suitable for the analysis of MG in complex samples. The method displayed good linear relationship in the concentration range of 0.5–20 μg mL − 1 (R 2 > 0.99), the low limit of detection of 0.21 mg L − 1 and 1.0 mg kg − 1 for food samples. Therefore, the β-CD-GO/MeS material has great application potential in the area of pre-concentration of complex matrix.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 5
·1-8
·
IF 5.479
Zhao Chen,Hong Cheng-yi,Lin Zheng-zhong,Chen Xiao-mei,Huang Zhi-Yong
A specific and sensitive colorimetric aptasensor is described for the determination of Malachite Green (MG). It is exploiting the inhibition of the peroxidase-like activity of gold nanoparticles (AuNPs). The AuNPs act as enzyme mimics that catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) by H 2 O 2 to yield a dark blue solution. The catalytic activity is inhibited by hexadecyl trimethyl ammonium ion, specifically by cetyltrimethylammonium bromide (CTAB), which causes the aggregation of AuNPs. If a (negatively charged) RNA-aptamer against MG is added, it binds to the positively charged CTAB and prevents aggregation. This enhances the enzyme mimicking activity of the AuNPs and leads to the formation of a dark blue solution. However, in the presence of MG, the aptamer binds to MG, and leads to the aggregation of AuNPs again. The aggregated AuNPs possess a light blue color. A colorimetric method (best performed at 650 nm) was work out that can detect MG in a concentration range from 10 to 500 nmol L −1 . The detection limit based on 3σ/k criterion is 1.8 nmol L −1 . The assay is highly specific and accurate. Recoveries from spiked real samples (aquaculture water) ranged from 80% to 120%.
Based on the inhibition of cetyltrimethyal ammonium ion and the enhancement of RNA-aptamer, the differences of the peroxidase-like activities of AuNPs can be greatly enlarged with and without MG, by which a colorimetric aptasensor can be constructed for the detection of Malachite Green (MG).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Le Wu,Zheng-zhong Lin,Hui-ping Zhong,Xiao-mei Chen,Zhi-yong Huang
A fluorescent probe based on CdTe quantum dots (QDs) coated with molecularly imprinted polymers (MIPs) was fabricated for the determination of malachite green (MG) by the strategy of fluorescence resonance energy transfer (FRET). The MIP-coated QDs were synthesized through precipitation polymerization using acrylamide and ethylene glycol dimethacrylate as monomer and cross-linker, respectively. The optimum molar ratio of MG, monomer and cross-linker was 1:8:40 in 60 mL of acetonitrile, and the polymerization time was 28 h. The MIP-coated QDs, with an average diameter around 290 nm, showed excellent fluorescence emission in 500–700 nm at λ ex 370 nm. The probe exhibited fluorescence quenching response to MG selectively within only 5 min at the concentrations from 0.1 to 20 μmol L −1 . The fluorescent probe was successfully used to detect MG in water and fish samples with a detection limit of 0.059 μmol L −1 (3 σ , n = 9). The spiked recoveries, from 94.8% to 98.1% for water samples, and 98.1% to 106.2% for fish samples, respectively, indicated that the as-prepared MIP-coated QDs could be used as a fluorescent probe to detect MG rapidly in water and fish samples.
✓ 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）