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Zhang J, Zhou Z, Zeng L, Wang C, Han R, Ren X, Wang W, Xiang M, Chen S, Li H. The molecular binding sequence transformation of soil organic matter and biochar dissolved black carbon antagonizes the transport of 2,4,6-trichlorophenol. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 947:174657. [PMID: 38986700 DOI: 10.1016/j.scitotenv.2024.174657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 05/29/2024] [Accepted: 07/07/2024] [Indexed: 07/12/2024]
Abstract
Dissolved organic matter (DOM) and dissolved black carbon (DBC) are significant environmental factors that influence the transport of organic pollutants. However, the mechanisms by which their molecular diversity affects pollutant transport remain unclear. This study elucidates the molecular binding sequence and adsorption sites through which DOM/DBC compounds antagonize the transport of 2,4,6-trichlorophenol (TCP) using column experiments and modelling. DBC exhibits a high TCP adsorption rate (kn = 5.32 × 10-22 mol1-n∙Ln-1∙min-1) and conditional stability constant (logK = 5.19-5.74), indicating a strong binding affinity and antagonistic effect on TCP. This is attributed to the high relative content of lipid/protein compounds in DBC (25.65 % and 30.28 %, respectively). Moreover, the small molecule lipid compounds showed stronger TCP adsorption energy (Ead = -0.0071 eV/-0.0093 eV) in DOM/DBC, combined with two-dimensional correlation spectroscopy model found that DOM/DBC antagonized TCP transport in the environment through binding sequences that transformed from lipid/protein small molecule compounds to lignin/tannin compounds. This study used a multifaceted approach to comprehensively assess the impact of DOM/DBC on TCP transport. It reveals that the molecular diversity of DOM/DBC is a critical factor affecting pollutant transport, providing important insights into the environmental trend and ecological effects of pollutants.
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Affiliation(s)
- Jin Zhang
- Institute for Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China
| | - Zhikang Zhou
- Institute for Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China
| | - Lingjun Zeng
- Institute for Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China
| | - Chen Wang
- Institute for Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
| | - Ruixia Han
- Key Laboratory of Urban Environment and Health, Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, PR China
| | - Xinlei Ren
- Institute for Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China
| | - Wenbing Wang
- Institute for Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China
| | - Minghui Xiang
- Institute for Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China
| | - Shuai Chen
- School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai 201209, PR China
| | - Hui Li
- Institute for Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
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Zhang J, Huang N, Li H, Cheng B, Zhou X, Wang C. Interaction between biochar-dissolved organic matter and chlorophenols during biochar adsorption. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:40375-40387. [PMID: 36609760 DOI: 10.1007/s11356-022-25083-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 12/27/2022] [Indexed: 06/17/2023]
Abstract
Biochar (BC) has been widely applied in the remediation of chlorophenols (CPs) from contaminated sites in which the role and mechanisms of BC dissolved organic matter (BDOM), as a crucial component of BC, with CPs are largely unknown and thus need to be investigated. In this study, DOM was derived from peanut hulls (PDOM) and corn stalks (CDOM) as BC sources, and the interactions between PDOM/CDOM and 2,4,6-trichlorophenol (TCP) were analysed using excitation-emission matrix spectroscopy (EEM) in combination with multiple models. EEM combined with fluorescence region integration (EEM-FRI) indicated that humic-like materials were the major materials of both PDOM and CDOM (percentage fluorescence response Ri,n > 60%), and CDOM contained more protein- and fulvic-like materials than PDOM. Based on EEM in combination with parallel factor analysis (EEM-PARAFAC), 4 components were obtained, and the percentage decrease in maximum fluorescence intensities (Fmax) showed that the main components interacting with TCP in PDOM/CDOM were protein- and fulvic-like components (> 25%). Moreover, the modified Stern-Volmer model was used to calculate the stability constants (Log KTCP) of PDOM/CDOM and TCP for the first time, and the mechanism of static quenching was dominant for interacting with TCP in PDOM (Log KTCP: 4.36-4.65) and CDOM (Log KTCP: 3.53-4.73). Furthermore, the sequential TCP binding of fluorescent components in BDOM generally followed the order of protein-like → short-wavelength fulvic-like → long-wavelength fulvic-like → humic-like components. These findings will provide a basis for screening biochar as a functional material for CP remediation applications and for understanding the environmental chemical behaviour of leached DOM during biochar application.
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Affiliation(s)
- Jin Zhang
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Nannan Huang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 10012, People's Republic of China
| | - Hui Li
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Biao Cheng
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Xuan Zhou
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Chen Wang
- Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, People's Republic of China.
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Tang Y, Wang X, Yang Y, Gao B, Wan Y, Li YC, Cheng D. Activated-Lignite-Based Super Large Granular Slow-Release Fertilizers Improve Apple Tree Growth: Synthesis, Characterizations, and Laboratory and Field Evaluations. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:5879-5889. [PMID: 28671837 DOI: 10.1021/acs.jafc.7b01699] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, lignite, a low-grade coal, was modified using the solid-phase activation method with the aid of a Pd/CeO2 nanoparticle catalyst to improve its pore structure and nutrient absorption. Results indicate that the adsorption ability of the activated lignite to NO3-, NH4+, H2PO4-, and K+ was significantly higher than that of raw lignite. The activated lignite was successfully combined with the polymeric slow-release fertilizer, which exhibits typical slow-release behavior, to prepare the super large granular activated lignite slow-release fertilizer (SAF). In addition to the slow-release ability, the SAF showed excellent water-retention capabilities. Soil column leaching experiments further confirmed the slow-release characteristics of the SAF with fertilizer nutrient loss greatly reduced in comparison to traditional and slow-release fertilizers. Furthermore, field tests of the SAF in an orchard showed that the novel SAF was better than other tested fertilizers in improve the growth of young apple trees. Findings from this study suggest that the newly developed SAF has great potential to be used in apple cultivation and production systems in the future.
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Affiliation(s)
- Yafu Tang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University , Tai'an, Shandong 271018, People's Republic of China
| | - Xinying Wang
- Weifang University of Science and Technology , Shouguang, Shandong 262700, People's Republic of China
| | - Yuechao Yang
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University , Tai'an, Shandong 271018, People's Republic of China
- Department of Soil and Water Science, Tropical Research and Education Center, Institute of Food and Agricultural Sciences (IFAS), University of Florida , Homestead, Florida 33031, United States
| | - Bin Gao
- Agricultural and Biological Engineering, Institute of Food and Agricultural Sciences (IFAS), University of Florida , Gainesville, Florida 32611, United States
| | - Yongshan Wan
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University , Tai'an, Shandong 271018, People's Republic of China
- Department of Soil and Water Science, Tropical Research and Education Center, Institute of Food and Agricultural Sciences (IFAS), University of Florida , Homestead, Florida 33031, United States
| | - Yuncong C Li
- Department of Soil and Water Science, Tropical Research and Education Center, Institute of Food and Agricultural Sciences (IFAS), University of Florida , Homestead, Florida 33031, United States
| | - Dongdong Cheng
- National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University , Tai'an, Shandong 271018, People's Republic of China
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Chu Q, Sha Z, Osaki M, Watanabe T. Contrasting Effects of Cattle Manure Applications and Root-Induced Changes on Heavy Metal Dynamics in the Rhizosphere of Soybean in an Acidic Haplic Fluvisol: A Chronological Pot Experiment. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:3085-3095. [PMID: 28368588 DOI: 10.1021/acs.jafc.6b05813] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
To characterize the dynamic mobilization of heavy metals (HM) in a crop-soil system affected by cattle manure (CM) application, soybean [Glycine max L. Merr. cv. Toyoharuka] crops were exposed in a chronological pot experiment to three CM application rates and sampled at two vegetative stages and two reproductive stages. A sequential extraction procedure for metal fractionation, soil pH, microbial activity, and plant HM uptake was determined. In non-rhizopshere soil, with CM application a liming effect was detected, and increased microbial activity was detected at the reproductive stage. CM application shifted Cd from available state to oxide-bound pool in non-rhizosphere soil; however, shifts in Cd from an oxide-bound pool to the available state were observed in rhizosphere soil. CM application stabilized the available Zn and Pb to oxide-bound Zn and organic-bound Pb in both non-rhizosphere and rhizosphere soils, and the stabilizing degree increased with higher CM application rates. The promoted Zn immobilization in the rhizosphere was due to the liming effects induced by added CM that counteracted the root-induced acidification. On the basis of a stepwise multiple regression analysis, the shift of Cd and Pb fractionation was mainly related to microbial activity. Adding manure inhibited Zn and Pb uptake but promoted Cd uptake by soybean, and a greater influence was detected at the reproductive stage, at which CM application increased the root Cd-absorbing power but did not significantly affect the Zn- and Pb-absorbing powers. In an agricultural context, long-term CM application, even at the recommended rate of 10.13 Mg ha-1, may cause a soybean Zn deficiency and high Pb accumulation in Haplic Fluvisols, although CM is often considered as an environmentally friendly fertilizer.
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Affiliation(s)
- Qingnan Chu
- Graduate School of Agriculture, Hokkaido University , Sapporo 060-8589, Japan
| | - Zhimin Sha
- School of Agriculture and Biology, Shanghai Jiaotong University , 200240 Shanghai, China
| | - Mitsuru Osaki
- Graduate School of Agriculture, Hokkaido University , Sapporo 060-8589, Japan
| | - Toshihiro Watanabe
- Graduate School of Agriculture, Hokkaido University , Sapporo 060-8589, Japan
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5
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Al-Faiyz YS. CPMAS 13 C NMR characterization of humic acids from composted agricultural Saudi waste. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2012.12.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Wang D, Markus J, Kim YJ, Wang C, Jiménez Pérez ZE, Ahn S, Aceituno VC, Mathiyalagan R, Yang DC. Coalescence of functional gold and monodisperse silver nanoparticles mediated by black Panax ginseng Meyer root extract. Int J Nanomedicine 2016; 11:6621-6634. [PMID: 28008248 PMCID: PMC5167459 DOI: 10.2147/ijn.s113692] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
A rapid biological synthesis of multifunctional gold nanoparticle (AuNp) and monodisperse silver nanoparticle (AgNp) was achieved by an aqueous extract of black Panax ginseng Meyer root. The physicochemical transformation into black ginseng (BG) greatly enhanced the pharmacological activities of white ginseng and its minor ginsenoside content. The optimal temperature conditions and kinetics of bioreduction were investigated. Formation of BG-AuNps and BG-AgNps was verified by ultraviolet–visible spectrophotometry at 548 and 412 nm, respectively. The biosynthesized BG-AgNps were spherical and monodisperse with narrow distribution, while BG-AuNps were icosahedral-shaped and moderately polydisperse. Synthesized nanoparticles exhibited long-term stability in buffers of pH 7.0–8.0 and biological media (5% bovine serum albumin) at an ambient temperature and at 37°C. BG-AgNps showed effective antibacterial activity against Escherichia coli and Staphylococcus aureus. BG-AuNps and BG-AgNps demonstrated increased scavenging activity against 2,2-diphenyl-1-picrylhydrazyl free radicals. In addition, BG-AuNps and BG-AgNps were nontoxic to HaCaT and MCF-7 cells; the latter showed no cytotoxicity at concentrations lower than 10 µg/mL. At higher concentrations, BG-AgNps exhibited apparent apoptotic activity in MCF-7 breast cancer cell line through reactive oxygen species generation and nuclear fragmentation.
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Affiliation(s)
- Dandan Wang
- Department of Oriental Medicine Biotechnology and Ginseng Bank
| | - Josua Markus
- Department of Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, Republic of Korea
| | - Yeon-Ju Kim
- Department of Oriental Medicine Biotechnology and Ginseng Bank
| | - Chao Wang
- Department of Oriental Medicine Biotechnology and Ginseng Bank
| | - Zuly Elizabeth Jiménez Pérez
- Department of Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, Republic of Korea
| | - Sungeun Ahn
- Department of Oriental Medicine Biotechnology and Ginseng Bank
| | | | - Ramya Mathiyalagan
- Department of Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, Republic of Korea
| | - Deok Chun Yang
- Department of Oriental Medicine Biotechnology and Ginseng Bank; Department of Biotechnology and Ginseng Bank, College of Life Sciences, Kyung Hee University, Yongin, Republic of Korea
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7
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Wang D, Markus J, Wang C, Kim YJ, Mathiyalagan R, Aceituno VC, Ahn S, Yang DC. Green synthesis of gold and silver nanoparticles using aqueous extract of Cibotium barometz root. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2016; 45:1548-1555. [DOI: 10.1080/21691401.2016.1260580] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Dandan Wang
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, Republic of Korea
| | - Josua Markus
- Department of Biotechnology, College of Life Science, Kyung Hee University, Yongin, Republic of Korea
| | - Chao Wang
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, Republic of Korea
| | - Yeon-Ju Kim
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, Republic of Korea
| | - Ramya Mathiyalagan
- Department of Biotechnology, College of Life Science, Kyung Hee University, Yongin, Republic of Korea
| | - Verónica Castro Aceituno
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, Republic of Korea
| | - Sungeun Ahn
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, Republic of Korea
| | - Deok Chun Yang
- Department of Oriental Medicine Biotechnology and Ginseng Bank, College of Life Science, Kyung Hee University, Yongin, Republic of Korea
- Department of Biotechnology, College of Life Science, Kyung Hee University, Yongin, Republic of Korea
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8
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Enhanced treatment of swine wastewater by electron beam irradiation and ion-exchange biological reactor. Sep Purif Technol 2016. [DOI: 10.1016/j.seppur.2015.11.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Lim SJ, Kim TH. Combined treatment of swine wastewater by electron beam irradiation and ion-exchange biological reactor system. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.03.021] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jasuja ND, Gupta DK, Reza M, Joshi SC. Green Synthesis of AgNPs Stabilized with biowaste and their antimicrobial activities. Braz J Microbiol 2015; 45:1325-32. [PMID: 25763037 PMCID: PMC4323306 DOI: 10.1590/s1517-83822014000400024] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Accepted: 04/17/2014] [Indexed: 11/29/2022] Open
Abstract
In the present study, rapid reduction and stabilization of Ag+ ions with different NaOH molar concentration (0.5 mM, 1.0 mM and 1.5 mM) has been carried out in the aqueous solution of silver nitrate by the bio waste peel extract of P.granatum. Generally, chemical methods used for the synthesis of AgNPs are quite toxic, flammable and have adverse effect in medical application but green synthesis is a better option due to eco-friendliness, non-toxicity and safe for human. Stable AgNPs were synthesized by treating 90 mL aqueous solution of 2 mM AgNO3 with the 5 mL plant peels extract (0.4% w/v) at different NaOH concentration (5 mL). The synthesized AgNPs were characterized by UV-Vis spectroscopy, TEM and SEM. Further, antimicrobial activities of AgNPs were performed on Gram positive i.e. Staphylococcus aureus, Bacillus subtilius and Gram negative i.e. E. coli, Pseudomonas aeruginosa bacteria. The AgNPs synthesized at 1.5 mM NaOH concentration had shown maximum zone of inhibition (ZOI) i.e. 49 ± 0.64 in E. coli, whereas Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus subtilius had shown 40 ± 0.29 mm, 28 ± 0.13 and 42 ± 0.49 mm ZOI respectively. The MIC value of 30 μg/mL observed for E. coli Whereas, Staphylococcus aureus, Bacillus subtilius and Pseudomonas aeruginosa had shown 45 μg/mL, 38 μg/mL, 35 μg/mL respectively. The study revealed that AgNPs had shown significant antimicrobial activity as compared to Streptomycin.
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Affiliation(s)
- Nakuleshwar Dut Jasuja
- School of Science Suresh Gyan Vihar University Mahal, JagatpuraJaipur India School of Science, Suresh Gyan Vihar University, Mahal, Jagatpura, Jaipur, India
| | - Deepak Kumar Gupta
- Centre for Converging Technologies University of Rajasthan Jaipur India Centre for Converging Technologies, University of Rajasthan, Jaipur, India
| | - Mohtashim Reza
- University Science Instrumentation Centre (USIC) University of Rajasthan Jaipur India University Science Instrumentation Centre (USIC), University of Rajasthan, Jaipur, India
| | - Suresh C Joshi
- Department of Zoology University of Rajasthan Jaipur India Department of Zoology, University of Rajasthan, Jaipur, India
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Ashokkumar S, Ravi S, Kathiravan V, Velmurugan S. Synthesis of silver nanoparticles using A. indicum leaf extract and their antibacterial activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 134:34-39. [PMID: 24997264 DOI: 10.1016/j.saa.2014.05.076] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 05/15/2014] [Accepted: 05/28/2014] [Indexed: 06/03/2023]
Abstract
Green synthesis of silver nanoparticles has been achieved using environmentally acceptable plant extract. It is observed that Abutilon indicum leaf extract can reduce silver ions into silver nanoparticles within 15 min of reaction time. The formation and stability of the reduced silver nanoparticles in the colloidal solution were monitored by UV-Vis spectrophotometer analysis. The mean particle diameter of silver nanoparticles was calculated from the XRD pattern. FT-IR spectra of the leaf extract after the development of nanoparticles are determined to allow identification of possible functional groups responsible for the conversion of metal ions to metal nanoparticles. The AgNPs thus obtained showed highly potent antibacterial activity toward Gram-positive (Staphyloccocus aureus and Bacillus subtilis) and Gram-negative (Salmonella typhi and Escherichia coli) microorganisms.
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Affiliation(s)
- S Ashokkumar
- Department of Physics, Annamalai University, Annamalainagar 608002, Tamil Nadu, India.
| | - S Ravi
- Department of Engg. Physics, Annamalai University, Annamalainagar 608002, Tamil Nadu, India.
| | - V Kathiravan
- Department of Physics, Annamalai University, Annamalainagar 608002, Tamil Nadu, India
| | - S Velmurugan
- Department of Engg. Physics, Annamalai University, Annamalainagar 608002, Tamil Nadu, India
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Fakour H, Lin TF. Experimental determination and modeling of arsenic complexation with humic and fulvic acids. JOURNAL OF HAZARDOUS MATERIALS 2014; 279:569-578. [PMID: 25108831 DOI: 10.1016/j.jhazmat.2014.07.039] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 07/17/2014] [Accepted: 07/18/2014] [Indexed: 06/03/2023]
Abstract
The complexation of humic acid (HA) and fulvic acid (FA) with arsenic (As) in water was studied. Experimental results indicate that arsenic may form complexes with HA and FA with a higher affinity for arsenate than for arsenite. With the presence of iron oxide based adsorbents, binding of arsenic to HA/FA in water was significantly suppressed, probably due to adsorption of As and HA/FA. A two-site ligand binding model, considering only strong and weak site types of binding affinity, was successfully developed to describe the complexation of arsenic on the two natural organic fractions. The model showed that the numbers of weak sites were more than 10 times those of strong sites on both HA and FA for both arsenic species studied. The numbers of both types of binding sites were found to be proportional to the HA concentrations, while the apparent stability constants, defined for describing binding affinity between arsenic and the sites, are independent of the HA concentrations. To the best of our knowledge, this is the first study to characterize the impact of HA concentrations on the applicability of the ligand binding model, and to extrapolate the model to FA. The obtained results may give insights on the complexation of arsenic in HA/FA laden groundwater and on the selection of more effective adsorption-based treatment methods for natural waters.
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Affiliation(s)
- Hoda Fakour
- Department of Environmental Engineering and Global Water Quality Research Center, National Cheng Kung University, Tainan City, Taiwan
| | - Tsair-Fuh Lin
- Department of Environmental Engineering and Global Water Quality Research Center, National Cheng Kung University, Tainan City, Taiwan.
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Qu X, Xie L, Lin Y, Bai Y, Zhu Y, Xie F, Giesy JP, Wu F. Quantitative and qualitative characteristics of dissolved organic matter from eight dominant aquatic macrophytes in Lake Dianchi, China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:7413-23. [PMID: 23666633 DOI: 10.1007/s11356-013-1761-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 04/22/2013] [Indexed: 05/10/2023]
Abstract
The aim of this research was to determine and compare the quantitative and qualitative characteristics of dissolved organic matters (DOM) from eight aquatic macrophytes in a eutrophic lake. C, H, N, and P in ground dry leaves and C, N, and P in DOM of the species were determined, and C/N, C/P, C/H, DOC/C, TDN/N, TDP/P, DOC/TDN, and DOC/TDP were calculated. Chemical structures of the DOM were characterized by the use of multiple techniques including UV-visible, FT-IR, and (13)C CP/MAS spectra. The results showed subtle differences in quantity and quality of DOM among species and life-forms. Except oriental pepper which had a C/H of 0.7, C/H of all the other species was 0.6. C/N and C/P of ground leaves was 10.5-17.3 and 79.4-225.3, respectively, which were greater in floating and submerged species than in the others. Parrot feather also had a small C/P (102.8). DOC/C, TDN/N, and TDP/P were 7.6-16.8, 5.5-22.6, and 22.9-45.6 %, respectively. Except C/N in emergent and riparian species, C/N in the other species and C/P in all the species were lower in their DOM than in the ground leaves. DOM of the macrophytes had a SUVA254 value of 0.83-1.80. The FT-IR and (13)C NMR spectra indicated that the DOM mainly contained polysaccharides and/or amino acids/proteins. Percent of carbohydrates in the DOM was 37.3-66.5 % and was highest in parrot feather (66.5 %) and crofton weed (61.5 %). DOM of water hyacinth, water lettuce, and sago pondweed may have the greatest content of proteins. Aromaticity of the DOM was from 6.9 % in water lettuce to 17.8 % in oriental pepper. DOM of the macrophytes was also different in polarity and percent of Ar-OH. Distinguished characteristics in quantity and quality of the macrophyte-derived DOM may induce unique environmental consequences in the lake systems.
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Affiliation(s)
- Xiaoxia Qu
- Institute of Water Science, Beijing Normal University, Beijing, 100875, People's Republic of China
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Bergier I, Vinhal-Freitas I, Guiotoku M. Low vacuum thermochemical conversion of anaerobically digested swine solids. CHEMOSPHERE 2013; 92:714-720. [PMID: 23582405 DOI: 10.1016/j.chemosphere.2013.03.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 03/09/2013] [Accepted: 03/11/2013] [Indexed: 06/02/2023]
Abstract
This work provides data on the production of biochar from the pyrolysis of the solid phase of swine effluents following anaerobic biodigestion. The study involved the low vacuum thermochemical conversion by environmental scanning electron microscope (ESEM) in a thermoregulated hot-stage tungsten SEM. The feedstock was characterized by FTIR, ESEM and energy dispersive X-ray analysis (EDS). The charred feedstock at peak temperatures of 300°C, 400°C, 500°C, 600°C, 700°C, and 1000°C were assessed by SEM and EDS. For each pyrolysis experiment, the exhaust gases were monitored by photoacoustic spectroscopy. SEM/EDS indicated that for increasing peak temperature in low vacuum pyrolysis, the mass losses are greater and the proportion of mineral particles such as P, Ca and Mg in the biochar. Photoacoustic spectroscopy showed that low vacuum pyrolysis is responsible for emissions of toxic gases NH3 and SO2 and radiative trace gases, especially N2O above 600°C.
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Affiliation(s)
- Ivan Bergier
- Biomass Conversion Laboratory, Embrapa, P.O. Box 109, 79320-900 Corumbá, MS, Brazil.
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Green Synthesis of Gold and Silver Nanoparticles UsingAverrhoa bilimbiFruit Extract. JOURNAL OF NANOTECHNOLOGY 2013. [DOI: 10.1155/2013/906592] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
We report on rapid one-step green synthesis of gold and silver nanoparticles using fruit extract ofAverrhoa bilimbi Linn. UV-Vis absorption spectroscopy was used to monitor the quantitative formation of gold and silver nanoparticles. The characteristics of the obtained gold and silver nanoparticles were studied using UV-Vis absorption spectroscopy (UV/Vis), Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), and Energy-dispersive spectroscopy (EDX). UV/Vis spectrum showed Surface Plasmon Resonance (SPR) for both gold and silver nanoparticles at 540 and 420 nm. The EDX spectrum of the solution containing gold and silver nanoparticles confirmed the presence of elemental gold and silver signals. The average diameter of the prepared nanoparticles in solution was about 50–150 nm. Synthesized particles were either hexagonal or rhomboidal in shape. This synthesis approach of gold and silver nanoparticles is cost effective and can be widely used in biological systems. The effect of fruit extract and metal ion concentration was also studied.
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Variations in methanogenic population structure under overloading of pre-acidified high-strength organic wastewaters. Process Biochem 2011. [DOI: 10.1016/j.procbio.2011.01.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ou X, Chen S, Quan X, Zhao H. Photoinductive activity of humic acid fractions with the presence of Fe(III): the role of aromaticity and oxygen groups involved in fractions. CHEMOSPHERE 2008; 72:925-931. [PMID: 18462778 DOI: 10.1016/j.chemosphere.2008.03.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Revised: 03/16/2008] [Accepted: 03/17/2008] [Indexed: 05/26/2023]
Abstract
Relationship between the photoinductive activity and the properties of humic acids (HA) fractions were investigated with and without Fe(III). Three fractions were separated based on the molecular weight (M(w)) and were obtained following the order of M(w): F(A)>F(B)>F(C). Compared to F(A) and F(B), photodegradation of atrazine under simulated sunlight was much faster in solution containing F(C), whose structure was dominated by greater aromaticity, more oxygen groups and fluorophores. The interaction of HA fractions and Fe(III) was studied using fluorescence spectrometry and F(C) had the largest quenching constant. The capacity of electron transfer, estimated from the amount of photoformed Fe(II), was also highest for F(C). Thus, the Fe(III)-F(C) complex was efficient in phototransformation of atrazine in nearly neutral aqueous solutions. These results suggest that the aromaticity and oxygen groups content of HA exert great influence on the binding ability of metals and on the fate of pollutants in natural waters.
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Affiliation(s)
- Xiaoxia Ou
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China
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