2024 |
Wang L, Cheng Y, Parekh G, Naidu R, 'Real-time monitoring and predictive analysis of VOC flux variations in soil vapor: Integrating PID sensing with machine learning for enhanced vapor intrusion forecasts', Science of the Total Environment, 924 (2024) [C1]
In the rapidly evolving domain of vapor intrusion (VI) assessments, traditional methodologies encompass detailed groundwater and soil vapor sampling coupled with comprehensive lab... [more]
In the rapidly evolving domain of vapor intrusion (VI) assessments, traditional methodologies encompass detailed groundwater and soil vapor sampling coupled with comprehensive laboratory measurements. These models, blending empirical data, theoretical equations, and site-specific parameters, evaluate VI risks by considering a spectrum of influential factors, from volatile organic compounds (VOC) concentrations in groundwater to nuanced soil attributes. However, the challenge of variability, influenced by dynamic ambient conditions and intricate soil properties, remains. Our study presents an advanced on-site gas sensing station geared towards real-time VOC flux monitoring, enriched with an array of ambient sensors, and spearheaded by the reliable PID sensor for VOC detection. Integrating this dynamic system with machine learning, we developed predictive models, notably the random forest regression, which boasts an R-squared value exceeding 79 % and mean relative error near 0.25, affirming its capability to predict trichloroethylene (TCE) concentrations in soil vapor accurately. By synergizing real-time monitoring and predictive insights, our methodology refines VI risk assessments, equipping communities with proactive, informed decision-making tools and bolstering environmental safety. Implementing these predictive models can simplify monitoring for residents, reducing dependence on specialized systems. Once proven effective, there's potential to repurpose monitoring stations to other VI-prone regions, expanding their reach and benefit. The developed model can leverage weather forecasting data to predict and provide alerts for future VOC events.
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Nova |
2024 |
Wang L, Cheng Y, Meftaul IM, Luo F, Kabir MA, Doyle R, et al., 'Advancing Soil Health: Challenges and Opportunities in Integrating Digital Imaging, Spectroscopy, and Machine Learning for Bioindicator Analysis', Analytical Chemistry, [C1]
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2023 |
Wang L, Cheng Y, Wu C, Luo F, Lin Z, Naidu R, 'Rapid on-site detection of underground petroleum pipeline leaks and risk assessment using portable gas chromatography-mass spectrometry and solid phase microextraction.', J Chromatogr A, 1696 463980 (2023) [C1]
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Nova |
2023 |
Wang L, Cheng Y, Gopalan S, Luo F, Amreen K, Singh RK, et al., 'Review and Perspective: Gas Separation and Discrimination Technologies for Current Gas Sensors in Environmental Applications.', ACS Sens, 8 1373-1390 (2023) [C1]
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Nova |
2023 |
Chen W, Cheng Y, Owens G, Chen Z, 'Self- immobilized bio-nanomaterials based on hybridized green reduced graphene and Burkholderia vietnamiensis C09V for enhanced removal of Sb species from mine wastewater', Chemical Engineering Journal, 472 145002-145002 (2023) [C1]
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2023 |
Zhao Z, Chen W, Cheng Y, Li J, Chen Z, 'Burkholderia cepacia immobilized onto rGO as a biomaterial for the removal of naphthalene from wastewater.', Environ Res, 235 116663 (2023) [C1]
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Nova |
2021 |
Wang L, Cheng Y, Naidu R, Chadalavada S, Bekele D, Gell P, et al., 'Application of portable gas chromatography mass spectrometer for rapid field based determination of TCE in soil vapour and groundwater', Environmental Technology and Innovation, 21 (2021) [C1]
The application of portable chromatography¿mass spectrometer (GC¿MS) is restrained by its detection limits without the development of proper sample pre-concentration methods. The ... [more]
The application of portable chromatography¿mass spectrometer (GC¿MS) is restrained by its detection limits without the development of proper sample pre-concentration methods. The primary focus of this paper is to introduce a practical field measurement methodology for the analysis of volatile organic compounds (VOCs) in soil vapour and groundwater using a portable gas (GC¿MS)system for application to in situ assessment of vapour intrusion from VOC contamination. A solid-phase micro-extraction (SPME) technique was applied for sample pre-concentration before the GC¿MS¿ measurement. Practical in-field soil gas SPME sampling methods have been developed to optimise the SPME extraction efficiency to then ultimately improve the detection limits of portable GC¿MS. An Australian site impacted by a chlorinated VOC, trichloroethylene (TCE), was the subject of the case study. To rapidly assess soil vapour samples in subsurface soil, in-house-developed retractable soil vapour sampling probes (SVSPs) were installed at the site in clusters at depths of 1 m, 2 m and 3 m below ground level at each sampling location. Use of the SVSPs for sampling enabled the generation of a three-dimensional map and distribution contours for TCE concentrations using the in situ measurement results of a portable GC¿MS analysis for vapour intrusion investigation. The results of the portable GC¿MS¿ analysis were compared with the results from conventional USEPA methods, such as TO-15 and Method 8265 for soil vapour and groundwater samples, respectively. This work demonstrates that the developed methodology of using a portable GC¿MS system has the capability for in-field quantitative analysis of VOCs for rapid contaminated site vapour intrusion assessment.
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Nova |
2021 |
Hoang SA, Lamb D, Seshadri B, Sarkar B, Cheng Y, Wang L, Bolan NS, 'Petroleum hydrocarbon rhizoremediation and soil microbial activity improvement via cluster root formation by wild proteaceae plant species', Chemosphere, 275 (2021) [C1]
Rhizoremediation potential of different wild plant species for total (aliphatic) petroleum hydrocarbon (TPH)-contaminated soils was investigated. Three-week-old seedlings of Acaci... [more]
Rhizoremediation potential of different wild plant species for total (aliphatic) petroleum hydrocarbon (TPH)-contaminated soils was investigated. Three-week-old seedlings of Acacia inaequilatera, Acacia pyrifolia, Acacia stellaticeps, Banksia seminuda, Chloris truncata, Hakea prostrata, Hardenbergia violacea, and Triodia wiseana were transplanted in a soil contaminated with diesel and engine oil as TPH at pollution levels of 4,370 (TPH1) and 7,500 (TPH2) mg kg-1, and an uncontaminated control (TPH0). After 150 days, the presence of TPH negatively affected the plant growth, but the growth inhibition effect varied between the plant species. Plant growth and associated root biomass influenced the activity of rhizo-microbiome. The presence of B. seminuda, C. truncata, and H. prostrata significantly increased the TPH removal rate (up to 30% compared to the unplanted treatment) due to the stimulation of rhizosphere microorganisms. No significant difference was observed between TPH1 and TPH2 regarding the plant tolerance and rhizoremediation potentials of the three plant species. The presence of TPH stimulated cluster root formation in B. seminuda and H. prostrata which was associated with enhanced TPH remediation of these two members of Proteaceae family. These results indicated that B. seminuda, C. truncata, and H. prostrata wild plant species could be suitable candidates for the rhizoremediation of TPH-contaminated soil.
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Nova |
2021 |
Wang L, Cheng Y, Naidu R, Gell P, Bowman M, 'Rapid In-Field Approaches for Delineating VOC in Both Soil Vapour and Groundwater for Vapour Intrusion Assessment', Frontiers in Environmental Science, 9 (2021) [C1]
Traditional contaminated site characterisation approaches are time-consuming, labour-intensive, and demand a high level of expertise. This case study provides a rapid field-based ... [more]
Traditional contaminated site characterisation approaches are time-consuming, labour-intensive, and demand a high level of expertise. This case study provides a rapid field-based solution to investigating a VOC contaminated site and its vapour incursion by combining soil vapour and groundwater survey. To fully assess the volatile organic compound (VOC) distribution in a contaminated site, a number of self-developed soil vapour sampling probes (SVSPs) were placed vertically at different locations in a grid with different depths. Hence, 3D subsurface contour maps for VOC concentrations in soil vapour can be obtained and used to help identify hot spots and the migration patterns of VOCs. This SVSP is ¿easy-to-install¿ in the field and a cost-effective solution for rapid assessment of soil vapour samples. The SVSPs can be installed both vertically and horizontally. If there is a requirement to take soil vapour samples beneath an existing building from a potential contamination source zone, SVSPs can be horizontally installed beneath the building without compromising its structural integrity. In addition, to ascertain the correct groundwater channels that are likely to carry contaminants from a potential source zone, an electrical resistivity tomography technique was employed to provide the preliminary information for groundwater delineation in a complex groundwater channel network.
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Nova |
2021 |
Wang L, Cheng Y, Naidu R, Bowman M, 'The Key Factors for the Fate and Transport of Petroleum Hydrocarbons in Soil With Related in/ex Situ Measurement Methods: An Overview', Frontiers in Environmental Science, 9 (2021) [C1]
Once petroleum hydrocarbons (PHs) are released into the soil, the interaction between PHs and soil media is dependent not only upon the soil properties but also on the characteris... [more]
Once petroleum hydrocarbons (PHs) are released into the soil, the interaction between PHs and soil media is dependent not only upon the soil properties but also on the characteristics of PHs. In this study, the key factors influencing the interactions between PHs and soil media are discussed. The key factors include: 1) the characteristics of PHs, such as volatility and viscosity; and 2) soil properties, such as porosity, hydraulic properties and water status, and organic matter; and 3) atmospheric circumstances, such as humidity and temperature. These key factors can be measured either ex-situ using conventional laboratory methods, or in situ using portable or handheld instruments. This study overviews the current ex/in situ techniques for measuring the listed key factors for PH contaminated site assessments. It is a tendency to apply in situ methods for PH contaminated site characterisation. Furthermore, handheld/portable Fourier transform infrared spectroscopy (FTIR) instrument provides tremendous opportunities for in-field PH contaminated site assessment. This study also reviewed the non-destructive FTIR spectroscopy analysis coupling with handheld FTIR for in-field PH contaminated site characterisation, including determining the concentration of total PH, dominant PH fractions and soil key properties for PH transport modelling.
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Nova |
2020 |
Wang L, Cheng Y, Lamb D, Naidu R, 'The application of rapid handheld FTIR petroleum hydrocarbon-contaminant measurement with transport models for site assessment: A case study', Geoderma, 361 (2020) [C1]
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Nova |
2019 |
Wang L, Cheng Y, Lamb D, Megharaj M, Naidu R, 'Application of Ion Selective Electrode array to simultaneously determinate multi-free ions in solution', Environmental Technology and Innovation, 15 (2019) [C1]
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Nova |
2019 |
Wang L, Cheng Y, Lamb D, Dharmarajan R, Chadalavada S, Naidu R, 'Application of infrared spectrum for rapid classification of dominant petroleum hydrocarbon fractions for contaminated site assessment', Spectrochimica Acta Part A-Molecular And Biomolecular Spectroscopy, 207 183-188 (2019) [C1]
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Nova |
2018 |
Cheng Y, Mallavarapu M, Naidu R, Chen Z, 'In situ fabrication of green reduced graphene-based biocompatible anode for efficient energy recycle', CHEMOSPHERE, 193 618-624 (2018) [C1]
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Nova |
2017 |
Cheng Y, Wang L, Faustorilla V, Mallavarapu M, Naidu R, Chen Z, 'Integrated electrochemical treatment systems for facilitating the bioremediation of oil spill contaminated soil', Chemosphere, 175 294-299 (2017) [C1]
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Nova |
2017 |
Wang L, Cheng Y, Lamb D, Lesniewski P, Chen Z, Mallavarapu M, Naidu R, 'Novel recalibration methodologies for ion-selective electrode arrays in the multi-ion interference scenario', Journal of Chemometrics, 31 (2017) [C1]
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Nova |
2017 |
Wang K, Cheng Y, Chen Y, Jin X, Chen Z, 'Green reduced graphene oxide electrodes by eucalyptus leaves extract to enhance the power generation of microbial fuel cells (MFC)', Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae, 37 2944-2950 (2017) [C1]
Green-reduced graphene oxide (G-rGO) film electrode and bio-reduced graphene oxide (B-rGO) film electrode are used as anodes in microbial fuel cells (MFCs) to examine their perfor... [more]
Green-reduced graphene oxide (G-rGO) film electrode and bio-reduced graphene oxide (B-rGO) film electrode are used as anodes in microbial fuel cells (MFCs) to examine their performance in electricity generation. The anodes were characterized by fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscope (SEM). Furthermore, the electrochemical techniques such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were applied to explore the electrochemical performance. The internal resistances of G-rGO group was 243.87 O with the maximum power densities and output voltage at 18.77 W·m-3 and 760 mV, respectively. However, the internal resistances of unmodified group and B-rGO group were larger at 375.21 O and 299.11 O. Besides, lower power density and output voltage were shown at 8.97 W·m-3 and 480 mV for control group and 13.16 W·m-3 and 635 mV for B-rGO group. Above all, it demonstrates that G-rGO film anodes performed better and can be applied as anode materials in MFC to accelerate electricity generation.
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Nova |
2017 |
Xiao X, Cheng Y, Wang Q, Chen Z, 'Effects of Fe nanoparticles on microbial fuel cells in startup process', Chinese Journal of Environmental Engineering, 11 5233-5238 (2017)
To explore the impact of different nano zero valent iron (nZVI) on microbial fuel cells (MFC) in the start-up phase, in this study, MFCs were setting up with different anodic subs... [more]
To explore the impact of different nano zero valent iron (nZVI) on microbial fuel cells (MFC) in the start-up phase, in this study, MFCs were setting up with different anodic substrates: sludge (control group), sludge containing chemical synthetic nZVI (c-nZVI group) and sludge containing green synthetic nZVI (g-nZVI group), respectively, and MFCs tested by five cycles. In the start-up process of g-nZVI group and c-nZVI group, a high concentration of nZVI could inhibit electricity generation, while nZVI made no essentially change in voltage output after MFC starting successfully. The results obtained from COD removal rate, SEM and electrochemical characterization showed that green synthesis of nZVI, was less likely to enrich on the electrode surface, change the surface electronic properties and suppress bacteria activity in anode to compare chemical synthetic nZVI.
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2016 |
Cheng Y, Zhou F, Li S, Chen Z, 'Removal of mixed contaminants, crystal violet, and heavy metal ions by using immobilized stains as the functional biomaterial', RSC Advances, 6 67858-67865 (2016) [C1]
A new functional biomaterial based on Burkholderia vietnamiensis C09V (C09V) was immobilized on beads and used for simultaneous removal of both heavy metals and crystal violet (CV... [more]
A new functional biomaterial based on Burkholderia vietnamiensis C09V (C09V) was immobilized on beads and used for simultaneous removal of both heavy metals and crystal violet (CV). The results showed that removal of CV and metal ions using immobilized cell bead (biomaterial) was more efficient than that of free cells, wherein 89.4% of CV and 64.1% of Cu(ii) were removed after 42 h of using the biomaterial, whilst only 27.1% of CV and 23.9% of Cu(ii) were removed by free cells. Similar results were also observed in the CV and Cr(vi) removal. Fourier transform infrared spectroscopy (FTIR) revealed the change of functional groups in the presence of heavy metals. Scanning electron microscopy (SEM) showed that the existence of Cu(ii) and Cr(vi) affected the cellular morphology of the strain. X-ray energy-dispersive spectrometer (EDS) indicated that Cu(ii) and Cr(vi) adsorbed. Further Cr(vi) reduced to Cr(iii) was observed by X-ray photoelectron spectroscopy analysis (XPS). Finally, reusability and wastewater application were carried out, which shows that this functional material has a potential for co-removal of CV and heavy metals.
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Nova |
2016 |
Wang L, Fang C, Cheng Y, Lamb D, Chen Z, Megharaj M, Naidu R, 'A practical way to make solid-state reference electrodes', Journal of Biochemistry and Analytical studies, 1 1-5 (2016) [C1]
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Nova |
2016 |
Wang L, Cheng Y, Lamb D, Chen Z, Lesniewski P, Mallavarapu M, Naidu R, 'Simultaneously determining multi-metal ions using an Ion Selective Electrode array system', Environmental Technology & Innovation, 6 165-176 (2016) [C1]
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Nova |
2015 |
Wang L, Liu E, Cheng Y, Bekele DN, Lamb D, Chen Z, et al., 'Novel methodologies for automatically and simultaneously determining BTEX components using FTIR spectra', Talanta, 144 1104-1110 (2015) [C1]
This study introduced a patented novel methodological system for automatically analysis of Fourier Transform Infrared Spectrometer (FTIR) spectrum data located at 'fingerprin... [more]
This study introduced a patented novel methodological system for automatically analysis of Fourier Transform Infrared Spectrometer (FTIR) spectrum data located at 'fingerprint' region (wavenumber 670-800 cm-1), to simultaneously determinate multiple petroleum hydrocarbons (PHs) in real mixture samples. This system includes: an object oriented baseline correction; Band decomposition (curve fitting) method with mathematical optimization; and Artificial Neural Network (ANN) for determination, which is suitable for the characteristics of this IR regions, where the spectra are normally with low signal to noise ratio and high density of peaks. BTEX components are potentially lethal carcinogens and contained in many petroleum products. As a case study, six BTEX components were determinate automatically and simultaneously in mixture vapor samples. The robustness of the BTEX determination was validated using real petroleum samples, and the prediction results were compared with gas chromatography-mass spectrometry (GC-MS).
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Nova |
2014 |
Gan L, Cheng Y, Palanisami T, Chen Z, Megharaj M, Naidu R, 'Pathways of reductive degradation of crystal violet in wastewater using free-strain Burkholderia vietnamiensis C09V', ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 21 10339-10348 (2014)
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2014 |
Zha S, Cheng Y, Gao Y, Chen Z, Megharaj M, Naidu R, 'Nanoscale zero-valent iron as a catalyst for heterogeneous Fenton oxidation of amoxicillin', Chemical Engineering Journal, 255 141-148 (2014) [C1]
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2014 |
Zhou F, Cheng Y, Gan L, Chen Z, Megharaj M, Naidu R, 'Burkholderia vietnamiensis C09V as the functional biomaterial used to remove crystal violet and Cu(II)', ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, 105 1-6 (2014)
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2014 |
Gan L, Zhou F, Cheng Y, Chen Z, 'Simultaneously removal of crystal violet and Cr (VI) by biomaterial immobilized Burkholderia vietnamiensis C09V', Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae, 34 107-114 (2014)
The removal efficiencies of crystal violet (CV) and Cr (VI) by the biomaterial based on the beads with immobilized Burkholderia vietnamiensis C09V, were compared with those of fre... [more]
The removal efficiencies of crystal violet (CV) and Cr (VI) by the biomaterial based on the beads with immobilized Burkholderia vietnamiensis C09V, were compared with those of free cells and those on the beads without immobilized cells. The results showed that CV and Cr (VI) were removed simultaneously by the biomaterial, with the removal efficiencies of 92.7% and 25.9% on 60.0 mg · L-1 CV and 50.0 mg · L-1 Cr (VI), respectively, after 42 h. The efficiencies were higher than those of free cells at 75.6% and 13.9% and than those without immobilized cells at 83.9% and 16.4%, respectively. The efficiencies displayed little change after 42 h. This indicated that the removal of CV and Cr (VI) was enhanced by the biomaterial due to its good adsorption of CV and Cr (VI), which was further confirmed by the adsorption of CV and Cr (VI) onto beads without beads without immobilized cells. This fit well to the pseudo-second order model (R2 > 0.99) and the equilibrium of CV and Cr (VI) were 0.288 mg · g-1, 0.082 mg · g-1 at 10 h, respectively. In addition, CV and Cr (VI) adsorbed simultaneously by the biomaterial, where CV was degraded and the adsorbed Cr (VI) was reduced to Cr (III) by Burkholderia vietnamiensis C09V, as confirmed by EDS, SEM, FTIR and XPS analysis.
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2014 |
Chen ZX, Cheng Y, Chen Z, Megharaj M, Naidu R, 'Kaolin-supported nanoscale zero-valent iron for removing cationic dye crystal violet in aqueous solution 189-196 (2014)
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2013 |
Xie W, Jiang C, Cheng Y, Liu H, Xu X, Chen Z, 'Toxic effect of CNTs on growth of Acidithiobacillus ferrooxidans and mechanism of toxication', Chinese Journal of Environmental Engineering, 7 3671-3676 (2013)
This present study investigated the effect of carbon nanotubes (CNTs) on the cell growth using Acidithiobacillus ferrooxidans as the experiment strain under different conditions a... [more]
This present study investigated the effect of carbon nanotubes (CNTs) on the cell growth using Acidithiobacillus ferrooxidans as the experiment strain under different conditions and its toxic mechanism characterized by SEM, EDS and FT-IR. The results showed the presence of CNTs could inhibit the growth of A. ferrooxidans and the toxicity increased when dosages of CNTs increased. A significant decrease of cell numbers at 40 h was observed when CNTs concentration was 500 mg/L (OD420=0.117) compared to the control (OD420=0.163). In addition, the solution pH and the temperature could impact obviously CNTs on the growth, the results showed that under the optimum conditions of 30°C, pH 3.0, CNTs had high toxicity to the growth of A. ferrooxidans. The SEM, EDS and FT-IR analyses showed that CNTs attached to the surface of cells, and reacted with -OH and N-H. Furthermore, the CNTs also could induce bacteria cells to produce reactive oxygen species (ROS) and lead to cell death.
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2013 |
Wen Y-M, Cheng Y, Tang C, Chen Z-L, 'Bioleaching of heavy metals from sewage sludge using indigenous iron-oxidizing microorganisms', JOURNAL OF SOILS AND SEDIMENTS, 13 166-175 (2013)
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2012 |
Cheng Y, Lin H, Chen Z, Megharaj M, Naidu R, 'Biodegradation of crystal violet using Burkholderia vietnamiensis C09V immobilized on PVA-sodium alginate-kaolin gel beads', ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, 83 108-114 (2012)
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2012 |
Chen Z-X, Cheng Y, Chen Z, Megharaj M, Naidu R, 'Kaolin-supported nanoscale zero-valent iron for removing cationic dye-crystal violet in aqueous solution', JOURNAL OF NANOPARTICLE RESEARCH, 14 (2012) [C1]
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