Wu Lei, Shikha Garg, T. David Waite,
Metal-organic complexes, especially those of ethylenediaminetetraacetic acid (EDTA) with metals such as copper (Cu) and nickel (Ni) (denoted here as Cu-EDTA and Ni-EDTA), are common contaminants in wastewaters from chemical and ... electrochemical oxidation of a wastewater containing both Cu-EDTA and Ni-EDTA complexes as well as separation and selective recovery ... demonstrate that the ME system successfully achieved 90% EDTA removal, 99% solid Cu recovery at the Cu ... was mainly driven by the direct reduction of EDTA-complexed Cu(II) at the cathode, oxidation of ...
Tópico(s): Electrochemical Analysis and Applications
2024 - Elsevier BV | Journal of Hazardous Materials
Yuyang Sun, Shikha Garg, Changyong Zhang, Boyue Lian, T. David Waite,
... effectively degrade complexes of nickel and ethylenediaminetetraacetic acid (EDTA) present in electroless nickel plating wastewaters. Our results show that Ni-EDTA complexes can be effectively degraded by an EAOP ... results further show that the rate of Ni-EDTA degradation is not a function of the rate ... controlled by the rate of transport of Ni-EDTA to the anode surface. The oxidation of EDTA to smaller noncomplexing entities releases Ni2+, which is ... onto the cathode as Ni0. While complete Ni-EDTA removal and Ni recovery are achieved within 2 ...
Tópico(s): Electrocatalysts for Energy Conversion
2023 - American Chemical Society | ACS ES&T Engineering
Ziwei Liu, Feiqiang He, Limin Zhou, Ying Dai, Zhuyao Li, Yuan Xu, Jianhua Ding,
Fe(II)EDTA regeneration mainly referring to Fe(III)EDTA and Fe(Ⅱ)EDTA-NO reduction has a very remarkable significance for NO removal using Fe(II)EDTA solution. Here, surface-fluorinated anatase TiO2 nanosheets with ... was prepared and firstly served for Fe(II)EDTA regeneration with ultraviolet light. The performance and kinetics of Fe(II)EDTA regeneration had been investigated under different F-TiO2 ... pH, and diverse temperatures, in which Fe(III)EDTA and Fe(II)EDTA-NO reduction rate raised and then decreased under ...
Tópico(s): Geochemistry and Elemental Analysis
2023 - Elsevier BV | Journal of environmental chemical engineering
Ja-Young Goo, Seonggyu Choi, Bongju Kim, Jongtae Jeong, Jang-Soon Kwon, Ho Young Jo,
... the decommissioning of nuclear power plants. Ethylenediaminetetraacetic acid (EDTA), used as a decontamination agent during the decommissioning ... radionuclides. This study investigated the effects of the EDTA present in simulated radioactive decommissioning wastes on the ... facilitated by the formation of highly mobile Co–EDTA complexes. However, Cs leaching was impeded by the competition for leaching with other metal–EDTA complexes. Moreover, the EDTA-induced carbonated layer with a dense pore structure ...
Tópico(s): Radioactive element chemistry and processing
2023 - Elsevier BV | Journal of Hazardous Materials
Mingliang Zhu, Ruixia Yuan, Chijia Wang, Qing-He Gao, Huaiyuan Wang, Huijuan Qian,
... 2H,2H-perfluorodecyl triethoxysilane (PFDS)/ethylenediamine tetraacetic acid (EDTA)/anodized copper oxide (ACO) coating at the surface ... copper alloy. The water contact angle of PFDS/EDTA/ACO coating reaches 164.53°, showing superhydrophobicity, which ... corrosion. Results show during the CaCO3 deposition test, EDTA molecules, EDTA-Zn2+ and EDTA-Cu2+ chelates stored in the micro-structure of superhydrophobic PFDS/EDTA/ACO coating are released to the interface and ... 48 h, the CaCO3 scaling mass of PFDS/EDTA/ACO coating was only 27.0 % that of ...
Tópico(s): Advanced Sensor and Energy Harvesting Materials
2023 - Elsevier BV | Applied Surface Science
Zhicheng Liu, Fengrui Zhang, Xuan Li, Danqian Wang,
The corrosion inhibition of EDTA-Ca for mild steel in chloride-contaminated concrete pore solution, with EDTA-Na as comparison, was investigated via several electrochemical ... characterizations. Results show that corrosion inhibition efficiency of EDTA-Ca is higher than that of EDTA-Na. Corrosion inhibition efficiency increased with an increase in EDTA-Ca concentration while decreased with the increased EDTA-Na concentration. EDTA-Ca adsorbs physiochemically on surface of mild steel which obeys Langmuir isotherm, while adsorption of EDTA-Na is physical obeying Freundluich isotherm. A much ...
Tópico(s): Concrete and Cement Materials Research
2023 - Elsevier BV | Cement and Concrete Composites
Wu Lei, Shikha Garg, Jiangzhou Xie, Changyong Zhang, Yuan Wang, T. David Waite,
... and Ni complexes with ethylenediaminetetraacetic acid (Cu/Ni-EDTA), which are commonly present in metal plating industry ... treatment of solutions containing either or both Cu-EDTA and Ni-EDTA using an electrochemical process is investigated under both ... reducing electrolysis conditions. Our results indicate that Cu-EDTA is decomplexed as a result of the cathodic ... more negative than the reduction potential of Cu-EDTA to Cu(0). In contrast, the very negative reduction potential of Ni-EDTA to Ni(0) renders the direct reduction of ...
Tópico(s): Environmental remediation with nanomaterials
2023 - American Chemical Society | Environmental Science & Technology
Mia L. DeSanctis, Elizabeth A. Soranno, Ella Messner, Ziyu Wang, Elena M. Turner, Rosalia Falco, Hannah J. Appiah-Madson, Daniel L. Distel,
Ethylenediaminetetraacetic acid (EDTA) is a divalent cation chelator and chemical preservative that has been shown to be the active ingredient of the popular DNA preservative DESS. EDTA may act to reduce DNA degradation during tissue ... by nucleases naturally occurring in animal tissues. Although EDTA is typically used between pH 7.5 and 8 in preservative preparations, the capacity of EDTA to chelate divalent cations is known to increase with increasing pH. Therefore, increasing the pH of EDTA-containing preservative solutions may improve their effectiveness as ...
Tópico(s): Ecology and Conservation Studies
2023 - Public Library of Science | PLoS ONE
Xinkai Yuan, Wei Xiong, Yanhua Peng, Bo Li, Jianzhi Zhang, Meiling Chen, Xiuqin Xiong, Liming Yang, Hui Shi, Xubiao Luo, Penghui Shao,
... PDS) dosage, and the initial concentration of Ni-EDTA on the removal of Ni-EDTA using TAP. Results showed that increasing the activation ... PDS dosage enhanced the removal rate of Ni-EDTA, whereas decreasing the pH and initial concentration of Ni-EDTA were more conducive to Ni-EDTA removal. In addition, the quenching experiment indicated that ... being the most important contributor in the Ni-EDTA removal process. The degradation mechanism of Ni-EDTA was also explored through ultra performance liquid chromatography– ...
Tópico(s): Arsenic contamination and mitigation
2023 - Elsevier BV | Journal of Water Process Engineering
Mohab Amin Kamal, Kahkashan Perveen, Faheema Khan, R. Z. Sayyed, Ghim Hock Ong, Santosh Chandra Bhatt, Jyoti Singh, Mohd Obaid Qamar,
... the environment. To explore the probable function of EDTA in ameliorating heavy metal toxicity and achieve the ... L. seedlings were treated with different concentrations of EDTA (0, 1.0, 2.0, 3.0, and ... capacity of heavy metals by B. juncea under EDTA treatments. In the absence of EDTA, B. juncea seedlings accrued heavy metals in their ... with the application of 2 mM kg −1 EDTA. Moreover, high levels (above 3 mM kg −1 ) of EDTA concentration have reduced the biomass of plants (roots ... photosynthetic area, and chlorophyll content. The effect of EDTA levels on photosynthetic pigments (chlorophyll a and b) ...
Tópico(s): Constructed Wetlands for Wastewater Treatment
2023 - Frontiers Media | Frontiers in Microbiology
Ao Zhang, Wenguang Zhou, Ying Zhang, Qianqian Ye, Cheng Li, Jianzhang Li,
... MOC composite by co-modifying with ethylenediaminetetraacetic acid (EDTA) or disodium ethylenediaminetetraacetic acid (EDTA-Na) in conjunction with tartaric acid. The four –COOH of EDTA and EDTA-Na coordinated well with the 5-phase structure ... the formation of microcracks. The synergistic effect between EDTA/EDTA-Na and tartaric acid prevented the disruption of ... softening coefficients of the MOC composite modified by EDTA and EDTA-Na in cooperation with tartaric acid after soaking ... and the wet strength of plywood modified with EDTA in cooperation with tartaric acid being 25% higher ...
Tópico(s): Layered Double Hydroxides Synthesis and Applications
2023 - Elsevier BV | Construction and Building Materials
Linqing Liang, Jiahong Wang, Yanxin Zhang,
... groups was synthesized for removal of Cr(III)-EDTA and Cr(III) in high salinity wastewater. Fe3O4@ ... and the determined adsorption amount of Cr(III)-EDTA and Cr(III) on the adsorbent was 9. ... 25 °C, respectively. Adsorption behavior of Cr(III)-EDTA could be better described by Langmuir isotherm and Cr(III) adsorption followed Freundlich isotherm. Cr(III)-EDTA and Cr(III) adsorption on the adsorbent followed ... adsorbent is higher than that of Cr(III)-EDTA. Fe3O4@void@C@H2O2 showed strong affinity for Cr(III) and Cr(III)-EDTA even in high salinity water. Moreover, Fe3O4@void@ ...
Tópico(s): Mercury impact and mitigation studies
2022 - Elsevier BV | Microporous and Mesoporous Materials
Yang Zong, Wenjie Ji, Yu Xie, Deli Wu,
• Ni(II) enhanced the mineralization of EDTA by O 3 under alkaline condition. • Ni(III) was generated via the oxidation of decomplexed Ni(II) by OH. • Both Ni(III) and OH contributed to the mineralization of EDTA . • Ni(III) promoted EDTA mineralization via decomposing OH-resistant oxalate . The mineralization ... mM Ni(II) enhanced the mineralization efficiency of EDTA by O 3 under alkaline conditions by 22. ... oxidants (i.e., OH and O 3 ) in EDTA mineralization, the overlooked Ni(III) species (i.e., ... an indispensable role in enhancing the mineralization of EDTA. The Ni(III) species was formed via the ...
Tópico(s): Analytical chemistry methods development
2022 - Elsevier BV | Separation and Purification Technology
Fe(II)EDTA shows superior ability in complexing absorption denitrification; however, the resulting Fe(II)EDTA-NO and its easy oxidation to Fe(III)EDTA decimate its role. Rapid Fe(II)EDTA regeneration from Fe(II)EDTA-NO and Fe(III)EDTA reduction is important for effective and successive nitrogen ... the performance, kinetics, and pathway of Fe(III)EDTA and Fe(II)EDETA-NO reduction by four ...
Tópico(s): Mercury impact and mitigation studies
2022 - Elsevier BV | Journal of environmental chemical engineering
Zhenxiang Pan, Bizhen Zeng, Genying Yu, Jiaheng Teng, Hanmin Zhang, Liguo Shen, Lining Yang, Hongjun Lin,
... a major foulant, and ethylene diamine tetraacetic acid (EDTA) is a strong chelating agent frequently used for ... known about TEP-associated membrane fouling affected by EDTA. This work was performed to investigate roles of EDTA addition in TEP (Ca-alginate gel was used ... solution firstly decreased and then increased rapidly with EDTA concentration increase (0-1 mM). A series of characterizations suggested that EDTA took roles in SFR of TEP solution by ... by the extended Flory-Huggins lattice theory. Initial EDTA addition disintegrated TEP structure by EDTA chelating calcium ...
Tópico(s): Membrane-based Ion Separation Techniques
2022 - Elsevier BV | The Science of The Total Environment
Xin-Ying Lin, Rong-Yue Xue, Lei Zhou, Yao-Sheng Zhang, Hongyu Wang, Shuo Zhang, Shiwei Li, Albert L. Juhasz, Q. Lena, Dongmei Zhou, Hongbo Li,
... in two soils variedly depending on Fe forms. EDTA-FeNa was most efficient, which reduced Pb-RBA ... or higher doses (3.6-68 % lower). When EDTA-FeNa, ferrous gluconate, ferric citrate, and ferrous bisglycinate ... precipitation was not observed in the intestinal tract. EDTA-FeNa, ferrous gluconate, ferric citrate, and ferrous sulfate ... 27-68 % lower). In comparison, among ten compounds, EDTA-FeNa elevated Fe concentrations in mouse liver, kidney, ... Fe absorption that competed with Pb. In addition, EDTA was unique from other organic ligands, ingestion of ...
Tópico(s): Heavy metals in environment
2022 - Elsevier BV | Environment International
Nurul Amal Nadhirah Mohamad, Junaidah Jai,
... the pulp and paper industry. Therefore, ethylenediaminetetraacetic acid (EDTA) was considered as an additive to minimize cellulose ... for statistical modeling and optimization of NaOH and EDTA charges for maximum pulp yield, lignin removal, and ... revealed a significant interaction effect of NaOH and EDTA charges on pulp yield and its cellulose content. ... optimum condition of 17.7% NaOH and 10% EDTA, pulping of banana stem at 100 ± 5 °C ... 0.6%, respectively, as compared to pulping without EDTA. Changes in the functional groups monitored using Fourier ...
Tópico(s): Biofuel production and bioconversion
2022 - Elsevier BV | Heliyon
Kang Gu, Yierfan Maierdan, Bing Chen,
Ethylenediamine tetra-acetic acid (EDTA) and its disodium salt derivative (EDTA-Na) (0.5% weight of MgO powder) were incorporated into MgO–MgSO4–H2O ternary ... magnesium oxysulfate (MOS) cement. The single effect of EDTA/EDTA-Na as well as the synergistic effect of EDTA/EDTA-Na and citric acid (CA) on the hydration ... MOS cement were investigated. The results showed that EDTA and EDTA-Na addition induced no new phase, but the ...
Tópico(s): Concrete and Cement Materials Research
2022 - Elsevier BV | Composites Part B Engineering
Yue Teng, Jiawei Zhu, Shan Xiao, Zhengzhuo Ma, Tao Huang, Zhiying Liu, Yanhua Xu,
... ACF) was successfully designed to adsorb Pb(II)-EDTA from electroplating wastewater. Characterization results revealed that CS ... of ACF and CS/ACF for Pb(II)-EDTA were compared by batch adsorption experiments. Pb(II)-EDTA adsorption by CS/ACF was minimally influenced by ... pH0 had a higher impact on Pb(II)-EDTA adsorption by ACF. Adsorption equilibrium on CS/ACF ... 30 min with 99.40% of Pb(II)-EDTA (0.1988 mmol∙g−1) removal. By contrast, ... could only eliminate 52.75% of Pb(II)-EDTA (0.1055 mmol∙g−1). The Freundlich model ...
Tópico(s): Recycling and Waste Management Techniques
2022 - Elsevier BV | Separation and Purification Technology
Sai Li, Tong Yue, Wei Sun, Chenyang Zhang, Jianyong He, Mingjun Han, Hongliang Zhang, Heng Yu, Wenyuan Li,
... removal of Ni (Ⅱ) chelated by ethylenediaminetetraacetic acid (EDTA) from wastewater remains an important but challenging environmental ... was proposed to remove Ni (Ⅱ) chelated by EDTA from simulated Ni-EDTA wastewater and real electroless nickel plating wastewater. The ... by DFT calculation. Regardless of the simulated Ni-EDTA wastewater or the real electroless nickel plating wastewater, ... increase the proportion of free Ni2+ in Ni-EDTA wastewater, thereby enhancing the Ni removal efficiency. Additionally, ...
Tópico(s): Analytical chemistry methods development
2022 - Elsevier BV | Process Safety and Environmental Protection
Muhammad Zia‐ur‐Rehman, Arisha Mubsher, Muhammad Rizwan, Muhammad Usman, Muhammad Jafir, Muhammad Umair, Hesham F. Alharby, Atif A. Bamagoos, Rahma Alshamrani, Shafaqat Ali,
... manure (FM), elemental sulphur (S) and ethylenediaminetetraacetic acid (EDTA) for Cd phytoremediation through spider plants (Chlorophytum comosum ... efficiency of S (0.1 and 0.2%), EDTA (0.1 and 0.2%, represented as EDTA-0.1 and EDTA-0.2) and FM (0.5 and 1%, ... found in FM treated plants followed by S, EDTA and control except in EDTA-0.2 treatment in which the lowest values ... Cd-50 as compared to control. Application of EDTA-0.2 increased the bioavailable fraction of Cd ... concentrations in shoot and roots were found in EDTA treated plants followed by S, control and FM ...
Tópico(s): Agricultural Science and Fertilization
2022 - Elsevier BV | Chemosphere
Wei Zhang, Xinyue Ma, Rui Li, Wenzheng Yang, Qiao Li, Xiuyun Sun, Jiansheng Li, Jinyou Shen,
... adsorbent to realize one-step elimination of typical EDTA-Cr(III) complexes without introducing secondary pollution. Batch experiment results illustrated that more than 93% of EDTA-Cr(III) was removed at pH = 3 or 6 (a final concentration of <1 mg/L EDTA-Cr(III) was detected in the residual solution ... Fh retained good performance for the removal of EDTA-Cr(III) after desorption reactions in 2 g/ ... series of experiments and characterization results suggested that EDTA-Cr(III) was adsorbed on Fh materials mainly ...
Tópico(s): Environmental remediation with nanomaterials
2021 - Elsevier BV | Colloids and Surfaces A Physicochemical and Engineering Aspects
Narasimha Murthy Umesh, Antolin Jesila Jesu Amalraj, Sea‐Fue Wang,
... work, a simple sonochemical-assisted synthesis of Bismuth-EDTA complex/GO flakes was achieved and was developed ... 3D hollow bricks were obtained for the Bi-EDTA complex without PVP. Surprisingly, PVP influenced the formation ... broken glass-like structured for PVP with Bi-EDTA complex. Bi-EDTA complex modified GCE was developed to determine the ... The results obtained by modifying the electrode Bi-EDTA complex with PVP showed good electrochemical performance compared ... bare and other controls like GO and Bi-EDTA complex without PVP. The synergetic effect and high ...
Tópico(s): Analytical Chemistry and Sensors
2021 - Elsevier BV | Journal of the Taiwan Institute of Chemical Engineers
Guangzhao Sun, Fenglian Fu, Bing Tang,
... in the environment makes many contaminants including metal-EDTA complexes being adsorbed on it. However, the fate of metal-EDTA complexes during the transformation of ferrihydrite was poorly ... Understanding the migration and speciation changes of metal-EDTA adsorbed on ferrihydrite during the transformation was helpful ... this work, the interaction of the two metal-EDTA complexes (Ni(II)-EDTA and Ca(II)-EDTA) and ferrihydrite during the 9-day transformation of ... was studied. The results showed that part of EDTA complexing metals changed to non-complexed metals during ...
Tópico(s): Iron oxide chemistry and applications
2021 - Elsevier BV | Chemosphere
Xinxin Hu, Shuai Yang, Xinyu You, Wenwen Zhang, Yu Liu, Wenyan Liang,
Cu-ethylenediaminetetraacetic acid (Cu-EDTA) has strong stability in water and is hard to remove by conventional methods. Fixed bed of particle electrodes was investigated on decomplexation of Cu-EDTA and simultaneously recovery of Cu in the present ... composed by Ni0 and Ni2+. Decomplexation of Cu-EDTA and total complexing copper (TCCu) nearly reached to ... TCu) deposited and recovered, at 1 mmol Cu-EDTA, 1.6 mA cm−2, pH of 3.15 and 1:1 molar ratio of Cu2+:EDTA. The acidic condition was beneficial to decomplexation, while ...
Tópico(s): Analytical Chemistry and Sensors
2021 - Elsevier BV | Chemical Engineering Journal
... highly reversible Zn–Mn flow battery by employing EDTA-Mn as the positive electrolyte. In aqueous solutions, EDTA exhibits a strong ligand field for Mn 2+ ... Mn 2+ . Benefiting from the coordination effect of EDTA, both electrochemical and material characterizations demonstrate a highly reversible Mn 2+ /Mn 3+ redox reaction in EDTA-Mn, which effectively inhibits the disproportionation reaction of ... electrode. The constructed Zn–Mn flow cell adopting EDTA-Mn not only demonstrates excellent rate performance with ...
Tópico(s): Supercapacitor Materials and Fabrication
2021 - Elsevier BV | Journal of Power Sources
Li Liang, Weiying Li, Yue Li, Wei Zhou, Jiping Chen,
... zero-valent iron (S-nZVI) toward Cd II -EDTA. • Fe and S had coupled effect on Cd II -EDTA removal. • The removal capacity of S-nZVI toward Cd II -EDTA was 746.6 mg/g within 90 min. • The removal of Cd II -EDTA by S-nZVI consisted of two-step replacement ... great influence on the removal of Cd II -EDTA by S-nZVI. In this study, the removal ... sulfidated nanoscale zero-valent iron (S-nZVI) toward EDTA-chelated Cd II (Cd II -EDTA) and the detailed effects of some critical factors on Cd II -EDTA removal by S-nZVI were systematically investigated. The ...
Tópico(s): Environmental remediation with nanomaterials
2021 - Elsevier BV | Separation and Purification Technology
Fan Zhang, Weilai Wang, Lei Xu, Chengzhi Zhou, Yanglong Sun, Junfeng Niu,
Ethylene diamine tetraacetic acid (EDTA) could form stable complexes with nickel due to its strong chelation. Ni-EDTA has significant impacts on human health because of ... prepared and employed in electrochemical degradation of Ni-EDTA. The oxygen evolution potential of ECR-TiO 2 ... 6 V vs. SCE. More than 96% Ni-EDTA and 88% TOC was removed after reaction for ... at pH 4.34. The degradation of Ni-EDTA was mainly through the cleavage of amine group within Ni-EDTA and furthermore decomposed it into small molecular acids ...
Tópico(s): Advanced Photocatalysis Techniques
2021 - Elsevier BV | Chemosphere
Nicole A. DiBlasi, E. Yalçıntaş, Floyd Stanley, Donald T. Reed, Amy E. Hixon,
Spectrophotometry was used to study the effect of EDTA on plutonium oxidation state distribution as a function ... L/M) under anoxic conditions. Novel Pu(V)-EDTA absorption bands were identified at 571, 993, 1105, ... 10 ± 1 cm−1M−1, respectively. Pu(V)-EDTA spectral changes occurred at L/M < 1, indicating only PuVO2(EDTA)3- formed with logK = 3.6 ± 0.3. Time-resolved experiments showed EDTA drastically increased the Pu(V/VI) reduction rate, ... pair electron donation and the oxidative decarboxylation of EDTA. Oxidation of Pu(III)-EDTA to Pu(IV)- ...
Tópico(s): Nuclear materials and radiation effects
2021 - Elsevier BV | Chemosphere
Mingliang Zhu, Huijuan Qian, Ruixia Yuan, Dongyan Zhao, Haichao Huang, Huaiyuan Wang,
... vinylidene fluoride)/fluorinated ethylene propylene/SiO 2 /CNTs-EDTA (PFSC-EDTA) composite coating was successfully fabricated and applied for ... 3 on the surface of the superhydrophobic PFSC-EDTA composite coating reached 0.0444 mg/cm 2 ... between the CaCO 3 solution and the PFSC-EDTA coating, the Ca 2+ could be firstly chelated by EDTA that was benefit for improving the anti-scaling performance of the superhydrophobic PFSC-EDTA composite coating. In another hand, the addition of EDTA to the CNTs played an important role in ...
Tópico(s): Marine Biology and Environmental Chemistry
2021 - Elsevier BV | Petroleum Science