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Meng Q, Wu L, Chen T, Xiong Y, Duan T, Wang X. Constructing the Electron-Rich Microenvironment of an All-Polymer-Based S-Scheme Homostructure for Accelerating Uranium Capture from Nuclear Wastewater. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024. [PMID: 39141319 DOI: 10.1021/acs.est.4c04881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
Large quantities of uranium-containing radioactive wastewater are typically generated during nuclear fuel cycle processes. Despite significant efforts, efficient capture of migratable hexavalent uranium U(VI) is still a huge challenge due to its acidity, radioactivity, coexisting organics, and high impurity cation abundance in wastewater. Herein, we have fabricated all-polymer-based 0D/2D C4N/C6N7 homostructure hybrids with an S-scheme electronic configuration by coordinating the band engineering of semiconductors to enrich uranium species from the complex wastewater environment. The sample can capture over 97% of U(VI) in the actual concentration of nuclear industrial reprocessing wastewater; also, the U(VI) enrichment ratio still exceeds 95% when the irradiation dose (including α, β, and γ) is up to 100 kGy. Density functional theory and X-ray absorption spectroscopy demonstrate that the aggregation of charge carriers on the surface of the sample regulates the electron-rich microenvironment, thus accelerating the reduction conversion of single electron reaction uranium disproportionation. It is expected that this work can provide more insight into other functional materials, thereby promoting uranium removal advancements in nuclear wastewater.
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Affiliation(s)
- Qi Meng
- State Key Laboratory of Environment-Friendly Energy Materials, CAEA Innovation Center of Nuclear Environmental Safety Technology, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Linzhen Wu
- State Key Laboratory of Environment-Friendly Energy Materials, CAEA Innovation Center of Nuclear Environmental Safety Technology, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
| | - Tao Chen
- State Key Laboratory of Environment-Friendly Energy Materials, CAEA Innovation Center of Nuclear Environmental Safety Technology, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
| | - Ying Xiong
- State Key Laboratory of Environment-Friendly Energy Materials, CAEA Innovation Center of Nuclear Environmental Safety Technology, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
| | - Tao Duan
- State Key Laboratory of Environment-Friendly Energy Materials, CAEA Innovation Center of Nuclear Environmental Safety Technology, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
| | - Xiangke Wang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
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Niu CP, Zhang CR, Liu X, Liang RP, Qiu JD. Synthesis of propenone-linked covalent organic frameworks via Claisen-Schmidt reaction for photocatalytic removal of uranium. Nat Commun 2023; 14:4420. [PMID: 37479725 PMCID: PMC10361971 DOI: 10.1038/s41467-023-40169-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 07/17/2023] [Indexed: 07/23/2023] Open
Abstract
The type of reactions and the availability of monomers for the synthesis of sp2-c linked covalent organic frameworks (COFs) are considerably limited by the irreversibility of the C=C bond. Herein, inspired by the Claisen-Schmidt condensation reaction, two propenone-linked (C=C-C=O) COFs (named Py-DAB and PyN-DAB) are developed based on the base-catalyzed nucleophilic addition reaction of ketone-activated α-H with aromatic aldehydes. The introduction of propenone structure endows COFs with high crystallinity, excellent physicochemical stability, and intriguing optoelectronic properties. Benefitting from the rational design on the COFs skeleton, Py-DAB and PyN-DAB are applied to the extraction of radionuclide uranium. In particular, PyN-DAB shows excellent removal rates (>98%) in four uranium mine wastewater samples. We highlight that such a general strategy can provide a valuable avenue toward various functional porous crystalline materials.
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Affiliation(s)
- Cheng-Peng Niu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, China
| | - Cheng-Rong Zhang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, China
| | - Xin Liu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, China
| | - Ru-Ping Liang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, China.
| | - Jian-Ding Qiu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang, 330031, China.
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang, 330013, China.
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3
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Bayuo J, Rwiza MJ, Sillanpää M, Mtei KM. Removal of heavy metals from binary and multicomponent adsorption systems using various adsorbents - a systematic review. RSC Adv 2023; 13:13052-13093. [PMID: 37124024 PMCID: PMC10140672 DOI: 10.1039/d3ra01660a] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 04/19/2023] [Indexed: 05/02/2023] Open
Abstract
The ecosystem and human health are both significantly affected by the occurrence of potentially harmful heavy metals in the aquatic environment. In general, wastewater comprises an array of heavy metals, and the existence of other competing heavy metal ions might affect the adsorptive elimination of one heavy metal ion. Therefore, to fully comprehend the adsorbent's efficiency and practical applications, the abatement of heavy metals in multicomponent systems is important. In the current study, the multicomponent adsorption of heavy metals from different complex mixtures, such as binary, ternary, quaternary, and quinary solutions, utilizing various adsorbents are reviewed in detail. According to the systematic review, the adsorbents made from locally and naturally occurring materials, such as biomass, feedstocks, and industrial and agricultural waste, are effective and promising in removing heavy metals from complex water systems. The systematic study further discovered that numerous studies evaluate the adsorption characteristics of an adsorbent in a multicomponent system using various important independent adsorption parameters. These independent adsorption parameters include reaction time, solution pH, agitation speed, adsorbent dosage, initial metal ion concentration, ionic strength as well as reaction temperature, which were found to significantly affect the multicomponent sorption of heavy metals. Furthermore, through the application of the multicomponent adsorption isotherms, the competitive heavy metals sorption mechanisms were identified and characterized by three primary kinds of interactive effects including synergism, antagonism, and non-interaction. Despite the enormous amount of research and extensive data on the capability of different adsorbents, several significant drawbacks hinder adsorbents from being used practically and economically to remove heavy metal ions from multicomponent systems. As a result, the current systematic review provides insights and perspectives for further studies through the thorough and reliable analysis of the relevant literature on heavy metals removal from multicomponent systems.
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Affiliation(s)
- Jonas Bayuo
- School of Materials, Energy, Water, and Environmental Sciences (MEWES), The Nelson Mandela African Institution of Science and Technology (NM-AIST) P.O. Box 447 Arusha Tanzania
- Department of Science Education, School of Science, Mathematics, and Technology Education (SoSMTE), C. K. Tedam University of Technology and Applied Sciences (CKT-UTAS) Postal Box 24 Navrongo Upper East Region Ghana
| | - Mwemezi J Rwiza
- School of Materials, Energy, Water, and Environmental Sciences (MEWES), The Nelson Mandela African Institution of Science and Technology (NM-AIST) P.O. Box 447 Arusha Tanzania
| | - Mika Sillanpää
- Department of Chemical Engineering, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg P. O. Box 17011 Doornfontein 2028 South Africa
| | - Kelvin Mark Mtei
- School of Materials, Energy, Water, and Environmental Sciences (MEWES), The Nelson Mandela African Institution of Science and Technology (NM-AIST) P.O. Box 447 Arusha Tanzania
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Mei D, Yan B. Flumequine-mediated fluorescent zeolitic imidazolate framework functionalized by Eu 3+ for sensitive and selective detection of UO 22+, Ni 2+ and Cu 2+ in nuclear wastewater. JOURNAL OF HAZARDOUS MATERIALS 2023; 447:130822. [PMID: 36680898 DOI: 10.1016/j.jhazmat.2023.130822] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/05/2023] [Accepted: 01/16/2023] [Indexed: 06/17/2023]
Abstract
Currently, antibiotics and heavy metal contaminants have posed a great threat for ecological security and human health. Herein, the lanthanide functionalized ZIF (named ZIF-90-PABA-Eu) is constructed by coordinating with Eu3+ via p-aminobenzoic acid intermediate. Due to the excellent fluorescence properties, the novel fluorescent probe can selectively monitor flumequine based on "turn on" mode. Furthermore, the obtained new material (named ZIF-90-PABA-Eu-Flu) can be used as "turn off" sensor for selective detection of both radioactive and nonradioactive heavy metal ions (UO22+, Ni2+ and Cu2+) which are the main component of nuclear industrial wastewater. ZIF-90-PABA-Eu-Flu shows ultra-short fluorescence response time (3 s) and ultra-low limit of detection (9.0 × 10-3, 1.3 × 10-2 and 6.1 × 10-4 ppm) for three metal ions, which may be attributed to its good affinity with UO22+, Ni2+ and Cu2+. Moreover, principal component analysis (PCA) is applied to distinguish the three metal ions. Additionally, the possible sensing mechanism is investigated by the UV-vis spectra, luminescence lifetimes and theoretical calculation analysis. Based on these results, ZIF-90-PABA-Eu possesses promising potential in practical application and provides insight for the design of novel probes to continuously monitor flumequine, radioactive and nonradioactive heavy metal ions.
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Affiliation(s)
- Douchao Mei
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China
| | - Bing Yan
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China.
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Chen XJ, Zhang CR, Liu X, Qi JX, Jiang W, Yi SM, Niu CP, Cai YJ, Liang RP, Qiu JD. Flexible three-dimensional covalent organic frameworks for ultra-fast and selective extraction of uranium via hydrophilic engineering. JOURNAL OF HAZARDOUS MATERIALS 2023; 445:130442. [PMID: 36436454 DOI: 10.1016/j.jhazmat.2022.130442] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 11/09/2022] [Accepted: 11/18/2022] [Indexed: 06/16/2023]
Abstract
It has been considered challenging to develop ideal adsorbents for efficient and lower adsorption time uranium extraction, especially 3D covalent organic frameworks with interpenetrating topologies and tunable porous structures. Here, a "soft" three-dimensional (3D) covalent organic framework (TAM-DHBD) with a fivefold interpenetrating structure is prepared as a novel porous platform for the efficient extraction of radioactive uranium. The resultant TAM-DHBD appears exceptional crystallinity, prominent porosity and excellent chemical stability. Based on the strong mutual coordination between phenolic-hydroxyl/imine-N on the main chain and uranium, TAM-DHBD can effectively avert the competition of other ions, showing high selectivity for uranium extraction. Impressively, the 3D ultra-hydrophilic transport channels and multi-directional uniform pore structure of TAM-DHBD lay the foundation for the ultra-high-speed diffusion of uranium (the adsorption equilibrium can be reached within 60 min under a high-concentration environment). Furthermore, the utilization of lightweight structure not only increases the adsorption site density, but renders the adsorption process flexible, achieving a breakthrough adsorption capacity of 1263.8 mg g-1. This work not only highlights new opportunities for designing microporous 3D COFs, but paves the way for the practical application of 3D COFs for uranium adsorption.
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Affiliation(s)
- Xiao-Juan Chen
- College of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Cheng-Rong Zhang
- College of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Xin Liu
- College of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Jia-Xin Qi
- College of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Wei Jiang
- College of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Shun-Mo Yi
- College of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Cheng-Peng Niu
- College of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Yuan-Jun Cai
- College of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Ru-Ping Liang
- College of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China.
| | - Jian-Ding Qiu
- College of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China; State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China.
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6
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Mei D, Liu L, Yan B. Adsorption of uranium (VI) by metal-organic frameworks and covalent-organic frameworks from water. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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7
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Embaby MA, Haggag ESA, El-Sheikh AS, Marrez DA. Biosorption of Uranium from aqueous solution by green microalga Chlorella sorokiniana. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:58388-58404. [PMID: 35366208 PMCID: PMC9395467 DOI: 10.1007/s11356-022-19827-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 03/16/2022] [Indexed: 06/14/2023]
Abstract
Uranium and its compounds are radioactive and toxic, as well as highly polluting and damaging the environment. Novel uranium adsorbents with high biosorption capacity that are both eco-friendly and cost-effective are continuously being researched. The non-living biomass of the fresh water green microalga Chlorella sorokiniana was used to study the biosorption of uranium from aqueous solution. The biosorption of uranium from aqueous solutions onto the biomass of microalga C. sorokiniana was investigated in batch studies. The results showed that the optimal pH for uranium biosorption onto C. sorokiniana was 2.5. Uranium biosorption occurred quickly, with an equilibrium time of 90 min. The kinetics followed a pseudo-second-order rate equation, and the biosorption process fit the Langmuir isotherm model well, with a maximum monolayer adsorption capacity of 188.7 mg/g. The linear plot of the DKR model revealed that the mean free energy E = 14.8 kJ/mol, confirming chemisorption adsorption with ion exchange mode. The morphology of the algal biomass was investigated using a scanning electron microscope and energy dispersive X-ray spectroscopy. The FTIR spectroscopy analysis demonstrated that functional groups (carboxyl, amino, and hydroxyl) on the algal surface could contribute to the uranium biosorption process, which involves ion exchange and uranium absorption, and coordination mechanisms. Thermodynamic simulations indicated that the uranium biosorption process was exothermic (ΔH = -19.5562 kJ/mol) and spontaneous at lower temperatures. The current study revealed that C. sorokiniana non-living biomass could be an efficient, rapid, low-cost, and convenient method of removing uranium from aqueous solution.
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Affiliation(s)
- Mohamed A Embaby
- Food Toxicology and Contaminants Department, National Research Centre, Cairo, Egypt
| | | | | | - Diaa A Marrez
- Food Toxicology and Contaminants Department, National Research Centre, Cairo, Egypt.
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8
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Niu CP, Zhang CR, Cui WR, Yi SM, Liang RP, Qiu JD. A conveniently synthesized redox-active fluorescent covalent organic framework for selective detection and adsorption of uranium. JOURNAL OF HAZARDOUS MATERIALS 2022; 425:127951. [PMID: 34894515 DOI: 10.1016/j.jhazmat.2021.127951] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 11/19/2021] [Accepted: 11/27/2021] [Indexed: 06/14/2023]
Abstract
Uranium is a key element in the nuclear industry and also a global environmental contaminant with combined highly toxic and radioactive. Currently, the materials based on post-modification of amidoxime have been developed for uranium detection and adsorption. However, the affinity of amidoxime group for vanadium is stronger than that of uranium, which is the main challenge hindering the practical application of amidoxime-based adsorbents. Herein, we synthesized a fluorescent covalent organic framework (TFPPy-BDOH) through integrating biphenyl diamine and pyrene unit into the π-conjugated framework. TFPPy-BDOH has an excellent selectivity to uranium due to the synergistic effect of nitrogen atom in the imine bond and hydroxyl groups in conjugated framework. It can achieve ultra-fast fluorescence response time (2 s) and ultra-low detection limit (8.8 nM), which may be attributed to its intrinsic regular porous channel structures and excellent hydrophilicity. More excitingly, TFPPy-BDOH can chemically reduce soluble U (VI) to insoluble U (IV), and release the binding site to adsorb additional U (VI), achieving high adsorption capacity of 982.6 ± 49.1 mg g-1. Therefore, TFPPy-BDOH can overcome the challenges faced by current amidoxime-based adsorbents, making it as a potential adsorbent in practical applications.
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Affiliation(s)
- Cheng-Peng Niu
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Cheng-Rong Zhang
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Wei-Rong Cui
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Shun-Mo Yi
- College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Ru-Ping Liang
- College of Chemistry, Nanchang University, Nanchang 330031, China.
| | - Jian-Ding Qiu
- College of Chemistry, Nanchang University, Nanchang 330031, China; Engineering Technology Research Center for Environmental Protection Materials and Equipment of Jiangxi Province, Pingxiang University, Pingxiang 337055, China.
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10
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Ozudogru Y, Merdivan M. Adsorption of U(VI) and Th(IV) ions removal from aqueous solutions by pretreatment with Cystoseira barbata. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06943-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Wang H, Guo H, Zhang N, Chen Z, Hu B, Wang X. Enhanced Photoreduction of U(VI) on C 3N 4 by Cr(VI) and Bisphenol A: ESR, XPS, and EXAFS Investigation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:6454-6461. [PMID: 31081617 DOI: 10.1021/acs.est.8b06913] [Citation(s) in RCA: 140] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The effect of Cr(VI) and bisphenol A (BPA) on U(VI) photoreduction by C3N4 photocatalyst was demonstrated by the batch experiments, electron spin resonance (ESR), X-ray photoelectron spectroscopy (XPS), X-ray absorption near edge structure (XANES), and extended X-ray absorption fine structure (EXAFS) techniques. The batch experiments manifested that Cr(VI) and BPA enhanced the photocatalytic activity of C3N4 for U(VI) photoreduction, whereas U(VI) photoreduction was significantly diminished with increased pH from 4.0 to 8.0. According to radical scavengers and ESR analysis, U(VI) was photoreduced to U(IV) by photogenerated electrons of conduction band edge, whereas Cr(VI) was reduced to Cr(III) by H2O2. BPA and its products such as organic acid and alcohols can capture photoinduced holes, which resulted in the enhancement of U(VI) photoreduction to U(IV). XPS and XANES analyses demonstrated that U(VI) was gradually photoreduced to U(IV) by C3N4 within irradiation 60 min, whereas U(IV) was reoxidized to U(VI) with increasing irradiation time. EXAFS analysis determined that the dominant interaction mechanisms of U(VI) on C3N4 after irradiation for 240 min were reductive precipitation and inner-sphere surface complexation. This work highlights the synergistic removal of radionuclides, heavy metals, and persistent organic pollutants by C3N4, which is crucial for the design and application of a high-performance photocatalyst in actual environmental cleanup.
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Affiliation(s)
- Huihui Wang
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering , North China Electric Power University , Beijing 102206 , P. R. China
- School for Radiological and Interdisciplinary Sciences , Soochow University and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions , 215123 Suzhou , P. R. China
- School of Life Science , Shaoxing University , Huancheng West Road 508 , Shaoxing 312000 , P. R. China
| | - Han Guo
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering , North China Electric Power University , Beijing 102206 , P. R. China
| | - Ning Zhang
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering , North China Electric Power University , Beijing 102206 , P. R. China
| | - Zhongshan Chen
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering , North China Electric Power University , Beijing 102206 , P. R. China
| | - Baowei Hu
- School of Life Science , Shaoxing University , Huancheng West Road 508 , Shaoxing 312000 , P. R. China
| | - Xiangke Wang
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering , North China Electric Power University , Beijing 102206 , P. R. China
- School for Radiological and Interdisciplinary Sciences , Soochow University and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions , 215123 Suzhou , P. R. China
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Rangabhashiyam S, Balasubramanian P. Characteristics, performances, equilibrium and kinetic modeling aspects of heavy metal removal using algae. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2018.07.009] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Jalali F, Fakhar J, Zolfaghari A. Investigation on biosorption of V (III), Ti(IV), and U(VI) ions from a contaminated effluent by a newly isolated strain of Galdieria sulphuraria. SEP SCI TECHNOL 2018. [DOI: 10.1080/01496395.2018.1543323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- F. Jalali
- Engineering Department, Shahid Beheshti University, Tehran, Iran
| | - J. Fakhar
- Biological Sciences Faculty, Shahid Beheshti University, Tehran, Iran
| | - A. Zolfaghari
- Engineering Department, Shahid Beheshti University, Tehran, Iran
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14
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Biosorption characteristics of Ceratophyllum demersum biomass for removal of uranium(VI) from an aqueous solution. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5269-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Sarkar K, Sen K, Lahiri S. Separation of long-lived 152Eu radioisotopes from a binary mixture of 152Eu and 134Cs by calcium alginate: a green technique. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5176-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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U(VI) biosorption by bi-functionalized Pseudomonas putida @ chitosan bead: Modeling and optimization using RSM. Int J Biol Macromol 2016; 89:647-58. [DOI: 10.1016/j.ijbiomac.2016.05.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 05/04/2016] [Accepted: 05/05/2016] [Indexed: 11/30/2022]
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17
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Azizi S, Kamika I, Tekere M. Evaluation of Heavy Metal Removal from Wastewater in a Modified Packed Bed Biofilm Reactor. PLoS One 2016; 11:e0155462. [PMID: 27186636 PMCID: PMC4871482 DOI: 10.1371/journal.pone.0155462] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 04/29/2016] [Indexed: 01/24/2023] Open
Abstract
For the effective application of a modified packed bed biofilm reactor (PBBR) in wastewater industrial practice, it is essential to distinguish the tolerance of the system for heavy metals removal. The industrial contamination of wastewater from various sources (e.g. Zn, Cu, Cd and Ni) was studied to assess the impacts on a PBBR. This biological system was examined by evaluating the tolerance of different strengths of composite heavy metals at the optimum hydraulic retention time (HRT) of 2 hours. The heavy metal content of the wastewater outlet stream was then compared to the source material. Different biomass concentrations in the reactor were assessed. The results show that the system can efficiently treat 20 (mg/l) concentrations of combined heavy metals at an optimum HRT condition (2 hours), while above this strength there should be a substantially negative impact on treatment efficiency. Average organic reduction, in terms of the chemical oxygen demand (COD) of the system, is reduced above the tolerance limits for heavy metals as mentioned above. The PBBR biological system, in the presence of high surface area carrier media and a high microbial population to the tune of 10 000 (mg/l), is capable of removing the industrial contamination in wastewater.
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Affiliation(s)
- Shohreh Azizi
- Department of Environmental Sciences, School of Agriculture and Environmental Sciences, University of South Africa, P. O. Box 392, Florida, 1710, South Africa
- * E-mail:
| | - Ilunga Kamika
- Department of Environmental Sciences, School of Agriculture and Environmental Sciences, University of South Africa, P. O. Box 392, Florida, 1710, South Africa
| | - Memory Tekere
- Department of Environmental Sciences, School of Agriculture and Environmental Sciences, University of South Africa, P. O. Box 392, Florida, 1710, South Africa
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