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Li Z, Xu B, Tao T, Li F, Zhang G, Wang Y. Coupling of Electric and Flow Fields to Enhance Ion Transport for Energy-Efficient Electrochemical Tap-Water Softening. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:7643-7652. [PMID: 38573006 DOI: 10.1021/acs.est.3c08333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Electrochemical-induced precipitation is a sustainable approach for tap-water softening, but the hardness removal performance and energy efficiency are vastly limited by the ultraslow ion transport and the superlow local HCO3-/Ca2+ ratio compared to the industrial scenarios. To tackle the challenges, we herein report an energy-efficient electrochemical tap-water softening strategy by utilizing an integrated cathode-anode-cathode (CAC) reactor in which the direction of the electric field is reversed to that of the flow field in the upstream cell, while the same in the downstream cell. As a result, the transport of ions, especially HCO3-, is significantly accelerated in the downstream cell under a flow field. The local HCO3-/Ca2+ ratio is increased by 1.5 times, as revealed by the finite element numerical simulation and in situ imaging. In addition, a continuous flow electrochemical system with an integrated CAC reactor is operated for 240 h to soften tap water. Experiments show that a much lower cell voltage (9.24 V decreased) and energy consumption (28% decreased) are obtained. The proposed ion-transport enhancement strategy by coupled electric and flow fields provides a new perspective on developing electrochemical technologies to meet the flexible and economic demand for tap-water softening.
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Affiliation(s)
- Zhengsen Li
- State Key Laboratory of Pollution Control and Resources Reuse (Tongji University), College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Bincheng Xu
- State Key Laboratory of Pollution Control and Resources Reuse (Tongji University), College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Tao Tao
- State Key Laboratory of Pollution Control and Resources Reuse (Tongji University), College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Fengting Li
- State Key Laboratory of Pollution Control and Resources Reuse (Tongji University), College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Gong Zhang
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | - Ying Wang
- State Key Laboratory of Pollution Control and Resources Reuse (Tongji University), College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
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Mahadevan G, Brahma RK, Kini RM, Valiyaveettil S. Purification of Intramineral Peptides from Cuttlebones and In Vitro Activity in CaCO 3 Biomineralization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:7249-7257. [PMID: 37201193 DOI: 10.1021/acs.langmuir.2c03433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Living organisms develop functional hard structures such as teeth, bones, and shells from calcium salts through mineralization for managing vital functions to sustain life. However, the exact mechanism or role of biomolecules such as proteins and peptides in the biomineralization process to form defect-free hierarchical structures in nature is poorly understood. In this study, we have extracted, purified, and characterized five major peptides (CBP1-CBP5) from the soluble organic materials (SOMs) of cuttlefish bone (CB) and used for the in vitro mineralization of calcium carbonate crystals. The SOMs induced nucleation of the calcite phase at low concentrations and the vaterite phase at high concentrations. The purified peptides nucleated calcite crystals and enhanced aggregation under laboratory conditions. Among five peptides, only CBP2 and CBP3 showed concentration-dependent nucleation, aggregation, and morphological changes of the calcite crystals within 12 h. Circular dichroism studies showed that the peptides CBP2 and CBP3 are in alpha helix and β-sheet conformation, respectively, in solution. CBP1 and CBP4 and CBP5 are in random coil and β-sheet conformation, respectively. In addition, the peptides showed different sizes in solution in the absence (∼27 nm, low aggregation) and presence (∼118 nm, high aggregation) of calcium ions. Aragonite crystals with needle-type morphologies were nucleated in the presence of Mg2+ ions in solution. Overall, exploring the activities of such intramineral peptides from CB help to unravel the mechanism of calcium salt deposition in nature.
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Affiliation(s)
- Gomathi Mahadevan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Rajeev Kungur Brahma
- Department of Biological Sciences, 14 science drive 4, National University of Singapore, Singapore 117543, Singapore
| | - R Manjunatha Kini
- Department of Biological Sciences, 14 science drive 4, National University of Singapore, Singapore 117543, Singapore
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, 16 Medical Drive, Singapore 117600, Singapore
| | - Suresh Valiyaveettil
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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Zeng G, Wang J, Dai M, Meng Y, Luo H, Zhou Q, Lin L, Zang K, Meng Z, Pan X. Natural iron minerals in an electrocatalytic oxidation system and in situ pollutant removal in groundwater: Applications, mechanisms, and challenges. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 871:161826. [PMID: 36708820 DOI: 10.1016/j.scitotenv.2023.161826] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/04/2023] [Accepted: 01/21/2023] [Indexed: 06/18/2023]
Abstract
Natural iron-bearing minerals are widely distributed in the environment and show prominent catalytic performance in pollutant removal. This work provides an overview of groundwater restoration technologies utilizing heterogeneous electro-Fenton (HEF) techniques with the aid of different iron forms as catalysts. In particular, applications of natural iron-bearing minerals in groundwater in the HEF system have been thoroughly summarized from either the view of organic pollutant removal or degradation. Based on the analysis of the catalytic mechanism in the HEF process by pyrite (FeS2), goethite (α-FeOOH), and magnetite (Fe3O4) and the geochemistry analysis of these natural iron-bearing minerals in groundwater, the feasibility and challenges of HEF for organic degradation by using typical iron minerals in groundwater have been discussed, and natural factors affecting the HEF process have been analyzed so that appropriate in situ remedial measures can be applied to contaminated groundwater.
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Affiliation(s)
- Ganning Zeng
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China; Key Laboratory of Ocean Space Resource Management Technology, MNR, Hangzhou 310012, China
| | - Ji Wang
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Mengzheng Dai
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yutong Meng
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Hongwei Luo
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Qian Zhou
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Liangyu Lin
- Key Laboratory of Ocean Space Resource Management Technology, MNR, Hangzhou 310012, China; Zhejiang Academic of Marine Science, Hangzhou 310012, China
| | - Kunpeng Zang
- Zhejiang Carbon Neutral Innovation Institute, Zhejiang University of Technology, Hangzhou 310014, China
| | - Zhu Meng
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiangliang Pan
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China.
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Kaporov A, Shtyka O, Ciesielski R, Kedziora A, Maniukiewicz W, Szynkowska-Jozwik M, Madeniyet Y, Maniecki T. Effect of CaO, Al 2O 3, and MgO Supports of Ni Catalysts on the Formation of Graphite-like Carbon Species during the Boudouard Reaction and Methane Cracking. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3180. [PMID: 37110015 PMCID: PMC10144290 DOI: 10.3390/ma16083180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/13/2023] [Accepted: 04/16/2023] [Indexed: 06/19/2023]
Abstract
The investigation of the course of the Boudouard reaction and methane cracking was performed over nickel catalysts based on oxides of calcium, aluminum, and magnesium. The catalytic samples were synthesized by the impregnation method. The physicochemical characteristics of the catalysts were determined using atomic adsorption spectroscopy (AAS), Brunauer-Emmett-Teller method analysis (BET), temperature-programmed desorption of ammonia and carbon dioxide (NH3- and CO2-TPD), and temperature-programmed reduction (TPR). Qualitative and quantitative identification of formed carbon deposits after the processes were carried out using total organic carbon analysis (TOC), temperature-programmed oxidation (TPO), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The selected temperatures for the Boudouard reaction and methane cracking (450 and 700 °C, respectively) were found to be optimal for the successful formation of graphite-like carbon species over these catalysts. It was revealed that the activity of catalytic systems during each reaction is directly related to the number of weakly interacted nickel particles with catalyst support. Results of the given research provide insight into the mechanism of carbon deposit formation and the role of the catalyst support in this process, as well as the mechanism of the Boudouard reaction.
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Affiliation(s)
- Artem Kaporov
- Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, 116 Zeromskiego St., 90-924 Lodz, Poland; (O.S.); (R.C.); (A.K.); (W.M.); (M.S.-J.); (T.M.)
| | - Oleksandr Shtyka
- Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, 116 Zeromskiego St., 90-924 Lodz, Poland; (O.S.); (R.C.); (A.K.); (W.M.); (M.S.-J.); (T.M.)
| | - Radoslaw Ciesielski
- Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, 116 Zeromskiego St., 90-924 Lodz, Poland; (O.S.); (R.C.); (A.K.); (W.M.); (M.S.-J.); (T.M.)
| | - Adam Kedziora
- Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, 116 Zeromskiego St., 90-924 Lodz, Poland; (O.S.); (R.C.); (A.K.); (W.M.); (M.S.-J.); (T.M.)
| | - Waldemar Maniukiewicz
- Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, 116 Zeromskiego St., 90-924 Lodz, Poland; (O.S.); (R.C.); (A.K.); (W.M.); (M.S.-J.); (T.M.)
| | - Malgorzata Szynkowska-Jozwik
- Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, 116 Zeromskiego St., 90-924 Lodz, Poland; (O.S.); (R.C.); (A.K.); (W.M.); (M.S.-J.); (T.M.)
| | - Yelubay Madeniyet
- Department of Chemistry and Chemical Technology, Faculty of Chemical Technology and Natural Sciences, Toraighyrov University, 64 Lomov St, Pavlodar 140008, Kazakhstan;
| | - Tomasz Maniecki
- Institute of General and Ecological Chemistry, Faculty of Chemistry, Lodz University of Technology, 116 Zeromskiego St., 90-924 Lodz, Poland; (O.S.); (R.C.); (A.K.); (W.M.); (M.S.-J.); (T.M.)
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5
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Zhang K, Yio M, Wong H, Buenfeld N. Real-time monitoring of carbonation of hardened cement pastes using Raman microscopy. J Microsc 2022; 286:126-133. [PMID: 35076109 PMCID: PMC9303739 DOI: 10.1111/jmi.13084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 11/26/2022]
Abstract
This study investigated the feasibility of Raman microscopy for monitoring early surface carbonation of hardened cement pastes in real time for up to 7 days. Samples were exposed to natural carbonation (440 ppm CO2) and accelerated carbonation (4% CO2), and the evolution of calcium carbonate (CaCO3) polymorphs, portlandite, ettringite, C‐S‐H gel and unreacted cement particles was followed. Results showed that calcite is the main polymorph formed under both natural and accelerated carbonation. Under accelerated carbonation, the formation of calcite on the sample surface completed within 1 day whereas under natural carbonation, the formation of calcite is expected to continue beyond 7 days. The contents of portlandite and ettringite decreased rapidly under accelerated carbonation but much more gradually under natural carbonation. However, calcium silicate minerals in unreacted cement particles remained unchanged throughout the carbonation processes. Overall, this study demonstrated that Raman microscopy is a valuable tool for non‐destructive real‐time imaging of surface carbonation in cement‐based materials. Carbonation of cement‐based materials involves atmospheric CO2 reacting with calcium‐bearing phases to form calcium carbonate. Carbonation is an important process because it can affect the durability of concrete structures by enabling corrosion of steel reinforcement. It is also an important process for developing carbon capture, utilisation and storage strategies with cementitious materials. The ability to observe and measure carbonation in real‐time is therefore highly valuable. However, all of the commonly used methods are destructive and unsuitable for real‐time monitoring. In this study, we showed that Raman spectroscopy combined with confocal microscopy is a powerful non‐destructive technique for monitoring early surface carbonation and phase evolution during natural and accelerated carbonation of cementitious materials. Furthermore, the technique is applicable to rough surfaces in ambient environment, and is therefore suited for studying samples in their natural state. Raman microscopy is able to capture high‐resolution images of phase distribution at the microscale, providing interesting new insights into the mechanisms of carbonation.
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Affiliation(s)
- Kai Zhang
- Centre for Infrastructure Materials, Department of Civil and Environmental Engineering, Imperial College London
| | - Marcus Yio
- Centre for Infrastructure Materials, Department of Civil and Environmental Engineering, Imperial College London
| | - Hong Wong
- Centre for Infrastructure Materials, Department of Civil and Environmental Engineering, Imperial College London
| | - Nick Buenfeld
- Centre for Infrastructure Materials, Department of Civil and Environmental Engineering, Imperial College London
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Yu BS, Sung YJ, Choi HI, Sirohi R, Sim SJ. Concurrent enhancement of CO 2 fixation and productivities of omega-3 fatty acids and astaxanthin in Haematococcus pluvialis culture via calcium-mediated homeoviscous adaptation and biomineralization. BIORESOURCE TECHNOLOGY 2021; 340:125720. [PMID: 34365300 DOI: 10.1016/j.biortech.2021.125720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/30/2021] [Accepted: 08/01/2021] [Indexed: 05/05/2023]
Abstract
Haematococcus pluvialis has attracted interest as a bio-platform for producing omega-3 fatty acids (ω-3 FA) and astaxanthin that have a great potential as anti-inflammatory drugs. This study aimed to concurrently enhance the CO2 fixation and the productivities of ω-3 FA and astaxanthin, which have been difficult to achieve because of the dissimilar culture methods for each goal, via calcium-mediated homeoviscous adaptation and biomineralization. As a result of 3 mM of Ca2+ addition, ω-3 FA content was improved by 31% due to Ca2+-induced homeoviscous adaptation. Biomineralization was promoted by the extracellular carbonic anhydrase, which resulted in 46.3% improvement in CO2 fixation. CaCO3 from the biomineralization was beneficially re-used in the H. pluvialis culture and triggered 178- and 522-fold increased biomass productivity and astaxanthin content, respectively, thanks to its anisotropic nature. The Ca2+-based productivity enhancement strategy was applied to large-scale culture which resulted improvement in overall bioprocess performance.
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Affiliation(s)
- Byung Sun Yu
- Department of Chemical and Biological Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, South Korea
| | - Young Joon Sung
- Department of Chemical and Biological Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, South Korea
| | - Hong Il Choi
- Department of Chemical and Biological Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, South Korea
| | - Ranjna Sirohi
- Department of Chemical and Biological Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, South Korea
| | - Sang Jun Sim
- Department of Chemical and Biological Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, South Korea.
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7
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Chow H, Ingelsson M, Roberts EPL, Pham ALT. How does periodic polarity reversal affect the faradaic efficiency and electrode fouling during iron electrocoagulation? WATER RESEARCH 2021; 203:117497. [PMID: 34371234 DOI: 10.1016/j.watres.2021.117497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 06/13/2023]
Abstract
Electrocoagulation (EC) is a promising electrochemical water treatment technology. However, a major challenge to sustaining effective long-term EC operation is controlling the precipitation of materials on the electrodes, commonly referred to as fouling. Periodically reversing electrode polarity has been suggested as an in-situ fouling mitigation strategy and is often implemented in EC field applications. However, the utility of this approach has not been investigated in detail. In this study, the effect of polarity reversal (PR) on the performance of EC using iron electrodes was examined under different water chemistry conditions and at a range of reversal frequencies. It was observed that the faradaic efficiency in PR-EC was always lower than that in the EC systems operated with a direct current (i.e., DC-EC). It was also observed that the faradaic efficiency progressively decreased as the current reversal frequency increased, with the faradaic efficiency dropping as low as 10% when the PR interval was 0.5 min. Results from fouling layer, chronopotentiometric, and cyclic voltammetric investigations indicated that the decrease in the faradaic efficiency was caused by (i) increased electrode fouling by iron precipitates and (ii) electrochemical side reactions at the electrode-electrolyte interface. The extent of these effects was dependent on the solution chemistry; oxyanions and sulfide were found to be particularly detrimental to the performance of PR-EC, causing severe electrode fouling while decreasing the faradaic efficiency. Fouling could be mitigated by increasing the solution convection rate, resulting in a shear on the electrode surface that removed iron and other electrochemically reactive species from the electrodes.
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Affiliation(s)
- Héline Chow
- Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, Ontario ON N2L 3G1, Canada
| | - Markus Ingelsson
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N 1NF, Canada
| | - Edward P L Roberts
- Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta T2N 1NF, Canada.
| | - Anh Le-Tuan Pham
- Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, Ontario ON N2L 3G1, Canada.
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Chow H, Pham ALT. Mitigating Electrode Fouling in Electrocoagulation by Means of Polarity Reversal: The Effects of Electrode Type, Current Density, and Polarity Reversal Frequency. WATER RESEARCH 2021; 197:117074. [PMID: 33784607 DOI: 10.1016/j.watres.2021.117074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 03/15/2021] [Accepted: 03/17/2021] [Indexed: 06/12/2023]
Abstract
One of the biggest issues in electrocoagulation (EC) water treatment processes is electrode fouling, which can cause decreased coagulant production, increased ohmic resistance and energy consumption, and reduced contaminant removal efficiency, among other operational problems. While it has been suggested that switching the current direction intermittently (i.e., polarity reversal, PR) can help mitigate electrode fouling, conflicting results about the utility of this approach have been reported in the literature. The objective of this study was to systematically investigate the effects of PR frequency and current density on the performance of Fe-EC and Al-EC. It was found that operating Fe-EC under the PR mode reduced neither electrode fouling nor energy consumption. Notably, the Faradaic efficiency (ϕ) in Fe-EC decreased with increasing PR frequency; ϕ was as low as 10% when a PR frequency of 0.5 minutes was employed. Unlike Fe-EC, operating Al-EC under the PR mode resulted in high coagulant production efficiencies, reduced energy consumption, and diminished electrode fouling. In addition to comparing PR-EC and DC-EC, a novel strategy to minimize electrode fouling was investigated. This strategy involved operating Fe DC-EC and Al DC-EC with a Ti-IrO2 cathode, whose fouling by Ca- and Mg-containing minerals could be readily avoided by periodically switching the current direction.
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Affiliation(s)
- Héline Chow
- Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Anh Le-Tuan Pham
- Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada.
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Kaewsaneha C, Elaissari A, Tangboriboonrat P, Opaprakasit P. Self-assembly of amphiphilic poly(styrene- b-acrylic acid) on magnetic latex particles and their application as a reusable scale inhibitor. RSC Adv 2020; 10:41187-41196. [PMID: 35519176 PMCID: PMC9057766 DOI: 10.1039/d0ra06334g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/05/2020] [Indexed: 12/11/2022] Open
Abstract
The deposition of scale on membranes or container and pipe surfaces (clogging the system) is a costly issue in water treatment processes or water-cooling systems. To effectively cope with this issue, magnetic polymeric nanoparticles (MPNPs) have been developed and applied as promising scale inhibitors, due to their high surface-area-to-volume ratio, surface modifiability, and magnetic separation ability. Carboxylated MPNPs, having a monodisperse size distribution (236 ± 26 nm) with a high magnetic content of 70 wt% and superparamagnetic properties, were fabricated by using a 2-step process: (i) formation of clusters of hydrophobic magnetic nanoparticles stabilized by oleic acid (OA-MNPs), and (ii) self-assembly of the amphiphilic block copolymer of poly(styrene27-b-acrylic acid120) (PS27-b-PAA120) onto the cluster surfaces. With application of ultrasonication to 12.0 wt% OA-MNPs, a three-dimensional network was formed by particle–particle interactions, suppressing coalescence, and then creating stable magnetic clusters. The cluster surfaces were then adsorbed by amphiphilic PS27-b-PAA120via the attractive force between hydrophobic PS blocks. This moves longer hydrophilic PAA blocks containing carboxylic acid groups into the water phase. The formulated MPNPs acted as a nanosorbent for calcium ion (Ca2+) removal with a removal efficiency of 92%. The MPNPs can be effectively reused for up to 4 cycles. Based on the electrostatic interactions between the negatively-charged polymer and the hydrated Ca2+, the resulting precipitation leads to the prevention of calcium carbonate scale formation. Insights into this mechanism open up a new perspective for magnetic-material applications as effective antiscalants. Carboxylated magnetic polymeric nanoparticles, having a high magnetic content, and superparamagnetic properties were prepared and applied as effective antiscalants.![]()
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Affiliation(s)
- Chariya Kaewsaneha
- School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology (SIIT), Thammasat University Pathum Thani 12121 Thailand
| | - Abdelhamid Elaissari
- Univ Lyon, University Claude Bernard Lyon-1, CNRS, LAGEPP-UMR 5007 F-69622 Lyon France
| | - Pramuan Tangboriboonrat
- Department of Chemistry, Faculty of Science, Mahidol University Rama 6 Road, Phyathai Bangkok 10400 Thailand
| | - Pakorn Opaprakasit
- School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology (SIIT), Thammasat University Pathum Thani 12121 Thailand
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A Multifaceted Kinetic Model for the Thermal Decomposition of Calcium Carbonate. CRYSTALS 2020. [DOI: 10.3390/cryst10090849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The existing kinetic models often consider the influence of a single factor alone on the chemical reaction and this is insufficient to completely describe the decomposition reaction of solids. Therefore, the existing kinetic models were improved using the pore structure model. The proposed model was verified using the thermal decomposition experiment on calcium carbonate. The equation has been modified as fα=n1−α1−1n−ln1−α−1m1−ψln1−α12. This led to the conclusion that the pore structure, generated during the thermal decomposition of calcite, has an important influence on the decomposition kinetics. The existing experimental data show that the improved model, with random pores as the main body, reasonably describes the thermal decomposition process of calcite.
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11
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Livne A, Mijowska SC, Polishchuk I, Mashikoane W, Katsman A, Pokroy B. A fungal mycelium templates the growth of aragonite needles. J Mater Chem B 2020; 7:5725-5731. [PMID: 31482938 DOI: 10.1039/c9tb01169b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fungi live within diverse environments and survive well under extreme conditions that are usually beyond the tolerance of most other organisms. In different environments fungi are known to induce precipitation of a wide range of minerals. Various species of fungi have been shown to facilitate calcium carbonate mineralization. Here, inspired by examples of needle-fiber calcite formed via fungus-induced biomineralization typically observed in soils and sediments, we utilized inactivated fungus to synthetically induce precipitation of CaCO3 needles. To our knowledge, the feasibility of growing aragonitic needles within fungal mycelium in vitro has not been previously demonstrated. The needles we obtained were curved, displayed hexagonal facets, and demonstrated high-aspect ratios close to 60. The size and shape of these synthetic needles matched those of the mycelium of the natural fungus. Utilizing high-resolution characterization techniques, we studied the morphology and the micro- and nanostructures of the aragonitic needles. Our findings showed that even inactivated fungal mycelium, if present in the crystallization environment, can serve as a template for the formation of high-aspect ratio fibers and can stabilize metastable polymorphs.
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Affiliation(s)
- Achiya Livne
- Department of Materials Science and Engineering, Technion - Israel Institute of Technology, Technion City, 3200003 Haifa, Israel.
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12
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The Effect of Temperature and Magnetic Field on the Precipitation of Insoluble Salts of Alkaline Earth Metals. J SOLUTION CHEM 2020. [DOI: 10.1007/s10953-020-00959-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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13
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Cha-Umpong W, Dong G, Razmjou A, Chen V. Effect of oscillating temperature and crystallization on graphene oxide composite pervaporation membrane for inland brine desalination. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.117210] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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CO2 capture and preparation of spindle-like CaCO3 crystals for papermaking using calcium carbide residue waste via an atomizing approach. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-019-0336-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Lei Y, Remmers JC, Saakes M, van der Weijden RD, Buisman CJN. Influence of Cell Configuration and Long-Term Operation on Electrochemical Phosphorus Recovery from Domestic Wastewater. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2019; 7:7362-7368. [PMID: 30972262 PMCID: PMC6446861 DOI: 10.1021/acssuschemeng.9b00563] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/04/2019] [Indexed: 05/09/2023]
Abstract
Phosphorus (P) is an important, scarce, and irreplaceable element, and therefore its recovery and recycling are essential for the sustainability of the modern world. We previously demonstrated the possibility of P recovery by electrochemically induced calcium phosphate precipitation. In this Article, we further investigated the influence of cell configuration and long-term operation on the removal of P and coremoved calcium (Ca), magnesium (Mg), and inorganic carbon. The results indicated that the relative removal of P was faster than that of Ca, Mg, and inorganic carbon initially, but later, due to decreased P concentration, the removal of Ca and Mg became dominant. A maximum P removal in 4 days is 75% at 1.4 A m-2, 85% at 8.3 A m-2 and 92% at 27.8 A m-2. While a higher current density improves the removal of all ions, the relative increased removal of Ca and Mg affects the product quality. While the variation of electrode distance and electrode material have no significant effects on P removal, it has implication for reducing the energy cost. A 16-day continuous-flow test proved calcium phosphate precipitation could continue for 6 days without losing efficiency even when the cathode was covered with precipitates. However, after 6 days, the precipitates need to be collected; otherwise, the removal efficiency dropped for P removal. Economic evaluation indicates that the recovery cost lies in the range of 2.3-201.4 euro/kg P, depending on P concentration in targeted wastewater and electrolysis current. We concluded that a better strategy for producing a product with high P content in an energy-efficient way is to construct the electrochemical cell with cheaper stainless steel cathode, with a shorter electrode distance, and that targets P-rich wastewater.
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Affiliation(s)
- Yang Lei
- Wetsus,
Centre of Excellence for Sustainable Water Technology, P.O. Box 1113, 8900CC Leeuwarden, The Netherlands
- Sub-department
Environmental Technology, Wageningen University
and Research, P.O. Box 17, 6700AA Wageningen, The Netherlands
| | - Jorrit Christiaan Remmers
- Sub-department
Environmental Technology, Wageningen University
and Research, P.O. Box 17, 6700AA Wageningen, The Netherlands
| | - Michel Saakes
- Wetsus,
Centre of Excellence for Sustainable Water Technology, P.O. Box 1113, 8900CC Leeuwarden, The Netherlands
| | - Renata D. van der Weijden
- Wetsus,
Centre of Excellence for Sustainable Water Technology, P.O. Box 1113, 8900CC Leeuwarden, The Netherlands
- Sub-department
Environmental Technology, Wageningen University
and Research, P.O. Box 17, 6700AA Wageningen, The Netherlands
| | - Cees J. N. Buisman
- Wetsus,
Centre of Excellence for Sustainable Water Technology, P.O. Box 1113, 8900CC Leeuwarden, The Netherlands
- Sub-department
Environmental Technology, Wageningen University
and Research, P.O. Box 17, 6700AA Wageningen, The Netherlands
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16
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Natsi PD, Rokidi SG, Koutsoukos PG. Precipitation of Calcium Carbonate (CaCO3) in Water–Monoethylene Glycol Solutions. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b04180] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- P. D. Natsi
- Department of Chemical Engineering, University of Patras and FORTH ICEHT, Patras, GR 26500, Greece
| | - S. G. Rokidi
- Department of Chemical Engineering, University of Patras and FORTH ICEHT, Patras, GR 26500, Greece
| | - P. G. Koutsoukos
- Department of Chemical Engineering, University of Patras and FORTH ICEHT, Patras, GR 26500, Greece
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17
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Subbiahdoss G, Zeng G, Aslan H, Ege Friis J, Iruthayaraj J, Zelikin AN, Meyer RL. Antifouling properties of layer by layer DNA coatings. BIOFOULING 2019; 35:75-88. [PMID: 30821496 DOI: 10.1080/08927014.2019.1568417] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 12/14/2018] [Accepted: 01/04/2019] [Indexed: 06/09/2023]
Abstract
Fouling is a major concern for solid/liquid interfaces of materials used in different applications. One approach of fouling control is the use of hydrophilic polymer coatings made from poly-anions and poly-cations using the layer-by-layer (LBL) method. The authors hypothesized that the poly-anionic properties and the poly-phosphate backbone of DNA would provide anti-biofouling and anti-scaling properties. To this end, poly(ethyleneimine)/DNA LBL coatings against microbial and inorganic fouling were developed, characterized and evaluated. DNA LBL coatings reduced inorganic fouling from tap water by 90% when incubated statically or under flow conditions mimicking surfaces in heat exchangers. The coatings also impaired biofilm formation by 93% on stainless steel from tap water, and resulted in a 97% lower adhesion force and reduced initial attachment of the human pathogens Staphylococcus aureus, Staphylococcus epidermidis and Pseudomonas aeruginosa on glass. This study demonstrates a proof of concept that LBL coatings with poly-anions harboring phosphate groups can address fouling in several applications.
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Affiliation(s)
| | - Guanghong Zeng
- a Interdisciplinary Nanoscience Center , Aarhus University , Aarhus , Denmark
| | - Hüsnü Aslan
- a Interdisciplinary Nanoscience Center , Aarhus University , Aarhus , Denmark
| | - Jakob Ege Friis
- b Department of Biological and Chemical Engineering , Aarhus University , Aarhus , Denmark
| | - Joseph Iruthayaraj
- b Department of Biological and Chemical Engineering , Aarhus University , Aarhus , Denmark
| | | | - Rikke Louise Meyer
- a Interdisciplinary Nanoscience Center , Aarhus University , Aarhus , Denmark
- d Department of Bioscience , Aarhus University , Aarhus , Denmark
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18
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Biocement Fabrication and Design Application for a Sustainable Urban Area. SUSTAINABILITY 2018. [DOI: 10.3390/su10114079] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Recently, designers have begun to pursue sustainability through the fabrication of materials from living organisms such as bacteria, fungi, and algae in order to address environmental issues. Based on the potential of materials from living organisms, this study has explored a sustainable design application using biocement formed thorough microbially-induced calcite precipitation (MICP), which produces minerals by bacterial metabolic activity. Since most of the studies on MICP thus far have focused on limited fields such as engineering, biotechnology, and geo-technology, this study has focused more on improving the application of biocement in design. We optimized MICP conditions using two parameters (i.e., concentration of urea-CaCl2 and bacterial cell density) through water percolation testing, compressive strength testing, and X-ray diffraction (XRD) analysis. Then, based on the optimized conditions, material compatibility testing and scalability testing were performed, and design application research was conducted as well. As a result, biocement has been identified as a potential sustainable design material, based on its 40% compressive strength compared to conventional concrete, improved material finish, aesthetic aspects, and environmental impact. This paper contributes to the development of biocement applications in the environmental design field through multidisciplinary research ranging from biological experiments to design applications.
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19
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Lei Y, Remmers JC, Saakes M, van der Weijden RD, Buisman CJN. Is There a Precipitation Sequence in Municipal Wastewater Induced by Electrolysis? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:8399-8407. [PMID: 29965745 PMCID: PMC6085724 DOI: 10.1021/acs.est.8b02869] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Electrochemical wastewater treatment can induce calcium phosphate precipitation on the cathode surface. This provides a simple yet efficient way for extracting phosphorus from municipal wastewater without dosing chemicals. However, the precipitation of amorphous calcium phosphate (ACP) is accompanied by the precipitation of calcite (CaCO3) and brucite (Mg(OH)2). To increase the content of ACP in the products, it is essential to understand the precipitation sequence of ACP, calcite, and brucite in electrochemical wastewater treatment. Given the fact that calcium phosphate (i.e., hydroxyapatite) has the lowest thermodynamic solubility product and highest saturation index in the wastewater, it has the potential to precipitate first. However, this is not observed in electrochemical phosphate recovery from raw wastewater, which is probably because of the very high Ca/P molar ratio (7.5) and high bicarbonate concentration in the wastewater resulting in formation of calcite. In the case of decreased Ca/P molar ratio (1.77) by spiking external phosphate, most of the removed Ca in the wastewater was used for ACP formation instead of calcite. The formation of of brucite, however, was only affected when the current density was decreased or the size of cathode was changed. Overall, the removal of Ca and Mg is much more affected by current density than the surface area of cathode, whereas for P removal, the reverse is true. Because of these dependencies, though there is no definite precipitation sequence among ACP, calcite, and brucite, it is still possible to influence the precipitation degree of these species by relatively low current density and high surface area or by targeting phosphorus-rich wastewaters.
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Affiliation(s)
- Yang Lei
- Wetsus, Centre
of Excellence for Sustainable Water Technology, P.O.
Box 1113, 8900CC Leeuwarden, The Netherlands
- Sub-department
Environmental Technology, Wageningen University
and Research, P.O. Box 17, 6700AA Wageningen, The Netherlands
| | - Jorrit Christiaan Remmers
- Sub-department
Environmental Technology, Wageningen University
and Research, P.O. Box 17, 6700AA Wageningen, The Netherlands
| | - Michel Saakes
- Wetsus, Centre
of Excellence for Sustainable Water Technology, P.O.
Box 1113, 8900CC Leeuwarden, The Netherlands
| | - Renata D. van der Weijden
- Wetsus, Centre
of Excellence for Sustainable Water Technology, P.O.
Box 1113, 8900CC Leeuwarden, The Netherlands
- Sub-department
Environmental Technology, Wageningen University
and Research, P.O. Box 17, 6700AA Wageningen, The Netherlands
- E-mail:
| | - Cees J. N. Buisman
- Wetsus, Centre
of Excellence for Sustainable Water Technology, P.O.
Box 1113, 8900CC Leeuwarden, The Netherlands
- Sub-department
Environmental Technology, Wageningen University
and Research, P.O. Box 17, 6700AA Wageningen, The Netherlands
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20
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Alpatova A, Alsaadi A, Ghaffour N. Boron evaporation in thermally-driven seawater desalination: Effect of temperature and operating conditions. JOURNAL OF HAZARDOUS MATERIALS 2018; 351:224-231. [PMID: 29550556 DOI: 10.1016/j.jhazmat.2018.02.056] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 02/04/2018] [Accepted: 02/28/2018] [Indexed: 06/08/2023]
Abstract
The volatilization of boron in thermal desalination processes, namely multi-stage flash (MSF) and air-gap membrane distillation (AGMD) was investigated for the first time. This phenomenon was observed at feed temperatures above 55 °C in both studied processes. In simulated MSF process with two feeds, model boric acid and Red Sea water, boron concentration in distillate increased with feed temperature increase from 55 °C to 104 °C because of the increase in boric acid vapor pressure. Salinity and pH were the main factors controlling boron evaporation. The achieved boron concentrations in simulated MSF process were consistent with those measured in distillate samples collected from commercial MSF plants. The AGMD process also revealed a strong influence of operating temperature on boron removal. However, unlike MSF process, the boron concentration in AGMD permeate decreased with the feed temperature increase from 55 °C to 80 °C due probably to increase in vapor production and corresponding permeate dilution. When AGMD was operated in concentrating mode at a constant feed temperature of 80 °C, permeate boron concentration increased with process time due to concentration polarization and membrane fouling. A 10% flux decline observed after 21 h was attributed to CaCO3 scaling on the membrane surface.
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Affiliation(s)
- A Alpatova
- King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Biological and Environmental Science and Engineering Division (BESE), Thuwal 23955-6900, Saudi Arabia
| | - A Alsaadi
- King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Biological and Environmental Science and Engineering Division (BESE), Thuwal 23955-6900, Saudi Arabia
| | - N Ghaffour
- King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Biological and Environmental Science and Engineering Division (BESE), Thuwal 23955-6900, Saudi Arabia.
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21
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Patel D, Kuperkar KC. Electrokinetic Potential, Thermal and Microscopic Investigation of Surfactant-Polymer Templates on Precipitated Calcium Carbonate Morphology with Dynamic Simulation. ChemistrySelect 2018. [DOI: 10.1002/slct.201702351] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dhruvi Patel
- Applied Chemistry Department; Sardar Vallabhbhai National Institute of Technology (SVNIT), Ichchhanath; Surat- 395 007, Gujarat - INDIA
| | - Ketan C. Kuperkar
- Applied Chemistry Department; Sardar Vallabhbhai National Institute of Technology (SVNIT), Ichchhanath; Surat- 395 007, Gujarat - INDIA
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22
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Narenkumar J, Sathishkumar K, Selvi A, Gobinath R, Murugan K, Rajasekar A. Role of calcium-depositing bacteria Agrobacterium tumefaciens and its influence on corrosion of different engineering metals used in cooling water system. 3 Biotech 2017; 7:374. [PMID: 29071171 DOI: 10.1007/s13205-017-1007-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 10/09/2017] [Indexed: 11/24/2022] Open
Abstract
The present investigation deals with the role of calcium-depositing bacterial community on corrosion of various engineering metals, namely, brass alloy (BS), copper (Cu), stainless steel (SS) and mild steel (MS). Based on the corrosion behavior, Agrobacterium tumefaciens EN13, an aerobic bacterium is identified as calcium-depositing bacteria on engineering metals. The results of the study are supported with biochemical characterization, 16S rRNA gene sequencing, calcium quantification, weight loss, electrochemical (impedance and polarization) and surface analysis (XRD and FTIR) studies. The calcium quantification study showed carbonate precipitation in abiotic system/biotic system as 50 and 700 ppm, respectively. FTIR results too confirmed the accumulation of calcium deposits from the environment on the metal surface by EN13. Electrochemical studies too supported the corrosion mechanism by showing a significant increase in the charge transfer resistance (Rct) of abiotic system (44, 33.6, 45, 29.6 Ω cm2) than compared to biotic system (41, 10.1 29 and 25 Ω cm2). Hence, the outcome of the present study confirmed the enhanced bioaccumulation behavior of calcium by the strain, EN13.
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Affiliation(s)
- Jayaraman Narenkumar
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore, Tamil Nadu 632115 India
| | - Kuppusamy Sathishkumar
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore, Tamil Nadu 632115 India
| | - Adikesavan Selvi
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore, Tamil Nadu 632115 India
| | - Rajagopalan Gobinath
- Faculty of Life Sciences and Biotechnology, South Asian University, Akbar Bhawan, Chanakyapuri, New Delhi 110021 India
| | - Kadarkarai Murugan
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore, Tamil Nadu 632115 India
- Division of Entomology, Department of Zoology, School of Life Sciences, Bharathiar University, Coimbatore, Tamil Nadu 641 046 India
| | - Aruliah Rajasekar
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Serkkadu, Vellore, Tamil Nadu 632115 India
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23
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Kostoglou M, Mitrouli ST, Karabelas AJ. Model Development and Experimental Data Analysis for Calcium Carbonate Membrane Scaling during Dead-End Filtration with Agitation. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04063] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Margaritis Kostoglou
- Division
of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, GR 541 24 Thessaloniki, Greece
| | - Soultana T. Mitrouli
- Division
of Chemical Technology, School of Chemistry, Aristotle University of Thessaloniki, GR 541 24 Thessaloniki, Greece
- Chemical
Process and Energy Resources Institute, Centre for Research and Technology - Hellas, sixth km Charilaou-Thermi Road, GR 57001 Thermi-Thessaloniki, Greece
| | - Anastasios J. Karabelas
- Chemical
Process and Energy Resources Institute, Centre for Research and Technology - Hellas, sixth km Charilaou-Thermi Road, GR 57001 Thermi-Thessaloniki, Greece
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24
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25
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Ma L, Zhao B, Shi H, Sha F, Liu C, Du H, Zhang J. Controllable synthesis of two CaO crystal generations: precursors' synthesis and formation mechanisms. CrystEngComm 2017. [DOI: 10.1039/c7ce01561e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, novel rod-like and block-like CaO crystals were prepared after calcinating three types of CaCO3 precursors containing dumbbell-like, wheat spike-like and microsphere-like morphologies at 1000 °C for 3 h.
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Affiliation(s)
- Liang Ma
- College of Chemical Engineering
- Inner Mongolia University of Technology
- Hohhot 010051
- China
- Inner Mongolia Engineering Research Center for CO2 Capture and Utilization
| | - Bosheng Zhao
- College of Chemical Engineering
- Inner Mongolia University of Technology
- Hohhot 010051
- China
- Inner Mongolia Engineering Research Center for CO2 Capture and Utilization
| | - Huihu Shi
- College of Chemical Engineering
- Inner Mongolia University of Technology
- Hohhot 010051
- China
- Inner Mongolia Engineering Research Center for CO2 Capture and Utilization
| | - Feng Sha
- College of Chemical Engineering
- Inner Mongolia University of Technology
- Hohhot 010051
- China
- Inner Mongolia Engineering Research Center for CO2 Capture and Utilization
| | - Chang Liu
- College of Chemical Engineering
- Inner Mongolia University of Technology
- Hohhot 010051
- China
- Inner Mongolia Engineering Research Center for CO2 Capture and Utilization
| | - Hong Du
- College of Chemical Engineering
- Inner Mongolia University of Technology
- Hohhot 010051
- China
- Inner Mongolia Engineering Research Center for CO2 Capture and Utilization
| | - Jianbin Zhang
- College of Chemical Engineering
- Inner Mongolia University of Technology
- Hohhot 010051
- China
- Inner Mongolia Engineering Research Center for CO2 Capture and Utilization
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26
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Calcium carbonate scaling of desalination membranes: Assessment of scaling parameters from dead-end filtration experiments. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.02.061] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Wang H, Alfredsson V, Tropsch J, Ettl R, Nylander T. Effect of Polyelectrolyte and Fatty Acid Soap on the Formation of CaCO3 in the Bulk and the Deposit on Hard Surfaces. ACS APPLIED MATERIALS & INTERFACES 2015; 7:21115-21129. [PMID: 26353982 DOI: 10.1021/acsami.5b04679] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The effects of sodium polyacrylate (NaPAA) as well as potassium oleate on the nucleation and calcium carbonate crystal growth on hard surfaces, i.e., stainless steel and silica, have been investigated at different temperatures. The relation between the surface deposition and the corresponding bulk processes has been revealed by combining dynamic light scattering (DLS), scanning electron microscopy (SEM), X-ray diffraction (XRD), and ellipsometry. The aim was to further our understanding of the crystal deposition/growth mechanism and how it can be controlled by the presence of polyelectrolytes (NaPAA) or soap (potassium oleate). The addition of polyelectrolytes (NaPAA) or soap (potassium oleate) decreases the size of CaCO3 particles in bulk solution and affects both crystal structure and morphology in the bulk as well as on hard surfaces. The amount of particles on hard surfaces decreases significantly in the presence of both potassium oleate and NaPAA. This was found to be a consequence of potassium oleate or NaPAA adsorption on the hard surface as well as on the CaCO3 crystal surfaces. Here, the polymer NaPAA exhibited a stronger inhibition effect on the formation and growth of CaCO3 particles than potassium oleate.
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Affiliation(s)
- Hao Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences , Taiyuan, Shanxi 030001, People's Republic of China
- Physical Chemistry, Department of Chemistry, Lund University , PO Box 124, SE-221 00 Lund, Sweden
| | - Viveka Alfredsson
- Physical Chemistry, Department of Chemistry, Lund University , PO Box 124, SE-221 00 Lund, Sweden
| | | | | | - Tommy Nylander
- Physical Chemistry, Department of Chemistry, Lund University , PO Box 124, SE-221 00 Lund, Sweden
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28
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Zhao T, Guo B, Zhang F, Sha F, Li Q, Zhang J. Morphology Control in the Synthesis of CaCO₃ Microspheres with a Novel CO₂Storage Material. ACS APPLIED MATERIALS & INTERFACES 2015; 7:15918-27. [PMID: 26176756 DOI: 10.1021/acsami.5b03568] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A green and template-free method was applied to control the morphology of CaCO3 microspheres with a layered nanostructure surface and pure crystalline phase of vaterite via the hydrothermal reaction between Ca(OH)2 saturated limpid solution and a novel CO2-storage material (CO2SM). Morphologies of the as-prepared CaCO3 crystals could be tuned with CO2SM concentration, reaction temperature, or crystallization time. After the precipitation of CaCO3 crystals, the filtered solution could not only be used to absorb CO2 but also to produce CaCO3 microspheres repeatedly with the addition of Ca(OH)2 solution. Furthermore, an aggregation and self-assembly mechanism for the formation CaCO3 microspheres had been proposed. As a result, this novel synthesis strategy of CaCO3 microspheres with CO2SM again emphasized that was possible to synthesize inorganic/organic hybrid materials with exquisite morphology and offered an alternative way for comprehensive utilization of CO2.
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Affiliation(s)
- Tianxiang Zhao
- College of Chemical Engineering, Inner Mongolia University of Technology, Huhhot 010051, China
| | - Bo Guo
- College of Chemical Engineering, Inner Mongolia University of Technology, Huhhot 010051, China
| | - Fei Zhang
- College of Chemical Engineering, Inner Mongolia University of Technology, Huhhot 010051, China
| | - Feng Sha
- College of Chemical Engineering, Inner Mongolia University of Technology, Huhhot 010051, China
| | - Qiang Li
- College of Chemical Engineering, Inner Mongolia University of Technology, Huhhot 010051, China
| | - Jianbin Zhang
- College of Chemical Engineering, Inner Mongolia University of Technology, Huhhot 010051, China
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29
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Hafid N, Belaatar M, Ben-Aazza S, Hadfi A, Ezahri M, Driouiche A. Characterization of Scale Formed in Drinking Water and Hot Water Pipes in the Taliouine Downtown—Morocco. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/ajac.2015.68065] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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30
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Karabelas AJ, Mitrouli S, Gragopoulos J, Karanasiou A, Isaias NP, Al Rammah AS. Monitoring the membrane scaling propensity of retentate in reverse osmosis desalination plants. ACTA ACUST UNITED AC 2014. [DOI: 10.1179/2051645214y.0000000024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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