RSC Advances
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2018
·Vol. 8
·期 38
·21084-21091
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IF 2.936
D. Zhang,X. Y. Liu,H. T. Zhao,L. Yang,T. Lü,M. Q. Jin
Radioactive iodine is quite mobile in soil and poses threats to human health and the ecosystem. Many materials, including layered double hydroxides (LDH), have been synthesized to successfully capture iodine from aqueous environments. However, limited information is available on the application of LDH in soil to immobilize iodine species. In the present study, the feasibility of using Mg–Al–NO3 LDH for retention of soil iodate (IO3−) in both batch and column systems was analyzed. The 2 : 1 Mg–Al–NO3 LDH exhibited the greatest removal efficiency of IO3− from aqueous solution, compared with 3 : 1 and 4 : 1 Mg–Al–NO3 LDH. The Mg2–Al–NO3 LDH demonstrated a strong affinity for IO3−, with a high sorption capacity of 149 528 mg kg−1 and a Freundlich affinity constant KF of 21 380 L kg−1. The addition of Mg2–Al–NO3 LDH in soil resulted in significant retention of IO3− in both the batch and column experiments. The affinity parameter KF of soil with the addition of 1.33% Mg2–Al–NO3 LDH was 136 L kg−1, which was 28.6 times higher than soil without LDH added. Moreover, the eluted iodate percentage was only 12.9% in the soil column with the 1.33% Mg2–Al–NO3 LDH addition, whereas almost 43.5% iodate was washed out in the soil column without LDH addition. The results suggested that Mg2–Al–NO3 LDH could effectively immobilize iodate in soil without obvious interference.
研究领域:
环境科学
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放射性污染控制
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Qian Zhao,Guangyuan Chen,Zeru Wang,Mei Jiang,Jingruolan Lin,Ling Zhang,Lin Zhu,Tao Duan
Effectively remove radioactive iodine from aqueous solutions is highly desirable for the purpose of radioactive liquid waste treatment. However, anionic radioiodine species do not prefer to sorb on minerals or inorganic sorbents . Herein, we report a stable millimeter-level bismuth-based polymer composite beads (δ-Bi 2 O 3 @PES) with fast removal kinetics and high adsorption capacities for both iodide (I − ) and iodate (IO 3 − ). Abundant micro-flower-like δ-Bi 2 O 3 was embedded in the porous interconnection network of polymer composite beads, making it an effective adsorbent for removing radioactive iodine. δ-Bi 2 O 3 @PES composite beads showed high adsorption capacities of 95.4 mg/g and 170.6 mg/g for I − and IO 3 − by forming an insoluble Bi 4 I 2 O 5 and BiOIO 3 phase, respectively, which also can selectively remove iodine anions in the presence of large excesses of NO 3 – and SO 4 2− . Furthermore, δ-Bi 2 O 3 @PES composite beads can highly reduce the Bi 3+ leaching of δ-Bi 2 O 3 powder after immersed in the acid solution and can be easily separated from the liquid after sorption . The performance of δ-Bi 2 O 3 @PES in dynamic column experiments indicates that economical Bi-based composite bead is a promising candidate sorbent for environmental remediation of actual iodine-contaminated water.
研究领域:
环境科学
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核化学
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材料科学
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Chenhui Yan,Bowen Zhang,Yansong Liu,Zhibing He
There are strong radiological hazards and the risk of direct cell damage in living organisms for radioactive iodate (131IO3–/129IO3–). Thus, it is essential to capture and remove them. In the contribution, the micro flower-like Bi2S3 (MF-Bi2S3) was prepared via a hydrothermal method to investigate its adsorption behavior toward IO3–. MF-Bi2S3 exhibits the maximum adsorption capacity of 875.6 mg/g for IO3– at pH ≈ 3, and the adsorbent achieves a removal efficiency of 98.98% within 2 h. Furthermore, the removal efficiency of MF-Bi2S3 can still reach 96.37% at high concentrations of coexisting anions such as Cl–, SO42–, NO3–, and CO32–, demonstrating excellent anti-interference performance. In simulated artificial groundwater, the adsorbent achieves a removal rate of 88.8% for IO3–, suggesting its potential to solve the problem of IO3– in actual wastewater. Notably, the adsorbed products change depending on iodine content, with BiI3O9 and BiOI as the intermediate products, and the final product is BiOIO3. X-ray photoelectron spectroscopy detects the presence of I2 and I3– in the product, which is attributed to the reduction and fixed to iodine by S2–. Meanwhile, the corresponding S2– becomes SO42– and remains in the liquid after the reaction. This work provides a breakthrough solution for effectively removing IO3–.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 3
·576
·
IF 5.3
Jiaqi Li,Mengzhou Wang,Xu Zhao,Zitong Li,Yihui Niu,Sufeng Wang,Qina Sun
Iodine is a nuclide of crucial concern in radioactive waste management. Nanomaterials selectively adsorb iodine from water; however, the efficient application of nanomaterials in engineering still needs to be developed for radioactive wastewater deiodination.Artemiaegg shells possess large surface groups and connecting pores, providing a new biomaterial to remove contaminants. Based on theArtemiaegg shell-derived biochar (AES biochar) and in situ precipitation and reduction of cuprous, we synthesized a novel nanocomposite, namely porous biochar-confined nano-Cu2O/Cu0(C-Cu). The characterization of C-Cu confirmed that the nano-Cu2O/Cu0was dispersed in the pores of AES biochar, serving in the efficient and selective adsorption of iodide and iodate ions from water. The iodide ion removal by C-Cu when equilibrated for 40 min exhibited high removal efficiency over the wide pH range of 4 to 10. Remarkable selectivity towards both iodide and iodate ions of C-Cu was permitted against competing anions (Cl−/NO3−/SO42−) at high concentrations. The applicability of C-Cu was demonstrated by a packed column test with treated effluents of 1279 BV. The rapid and selective removal of iodide and iodate ions from water is attributed to nanoparticles confined on the AES biochar and pore-facilitated mass transfer. Combining the advantages of the porous biochar and nano-Cu2O/Cu0, the use of C-Cu offers a promising method of iodine removal from water in engineering applications.Keywords:nanoparticles;cuprous;biochar;Artemia;iodide ion;iodate ion
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yiyang Lin,Tao Lin,Han Chen,Junding Yin
The effect of N , N -bis(carboxymethyl)glutamic acid (GLDA) on the removal of organic pollutants by Fe(II)-mediated periodate (PI) advanced oxidation process at neutral pH was investigated, in which N-(1,3-dimethylbutyl)- N ′-phenyl- p -phenylenediamine quinone (6PPD-Q) was used as the model pollutant. The results showed that the Fe(II)-GLDA complex formed by mixing GLDA with Fe(II) in a 1:1 ratio reacted with PI can degrade 6PPD-Q effectively. The presence of GLDA alters the redox potential of Fe(II)/Fe(III), which allows for a better utilization of Fe(II) under the synergistic effect of ultraviolet (UV) irradiation. Based on quenching experiments, sulfoxide probe transformation and electron spin resonance (ESR) signals, the reactive species that play a major role in this process are Fe IV O and IO 3 . The degradation products of 6PPD-Q were detected by Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry (UPLC-MS/MS) and two possible degradation pathways were proposed based on density functional theory (DFT) calculations. The toxicity of 6PPD-Q was found to be effectively reduced after degradation by Ecological Structure Activity Relationships (ECOSAR) software analysis and zebrafish experiments. This study provides some fundamental insights for the removal of organic pollutants by GLDA-enhanced Fe(II)/PI system under neutral conditions.
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
·
IF 1.6
Sun Yuchen,Guo Mingyu
In this work, we report the efficient removal of I − /IO 3 − from wastewater by tripropylamine quaternary ammonium cation based monodisperse microspheres. Benefitting from the rapid solvent exchange process and the excellent ionic selectivity of tripropylamine quaternary ammonium cation, these microspheres show capture rate of 98% for I − and 66% for IO 3 − at a concentration of 50 ppm. Meanwhile, they exhibit high adsorption capacities of 350 mg/g for I − and 370 mg/g for IO 3 − , coupling with excellent reusability. These characteristics highlight their superior practicability for removal of iodine, particularly in the context of radioactive iodine-contaminated water.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Shuoxing Yang,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongwei Yu
Introducing F– anions or substituting F– anions with IO3– groups has been proven to be ideal strategies for designing novel noncentrosymmetric (NCS) and polar materials, yet systematic investigation into the effect of F– anions or the substitution of IO3– for F– anions on structures and properties remains rarely explored. Herein, two new gallium iodates, NaGa(IO3)2F2 (1) and NaGa(IO3)4 (2), were successfully designed and synthesized based on NaGa(IO3)3F by introducing more F– anions and replacing F– anions with IO3 groups, respectively. Structurally, in compound 1, the adjacent [GaF3(IO3)3]3– polyanions are connected in an antiparallel manner, resulting in a complete cancellation of local polarity. While in compound 2, all IO3 groups in 2D [Ga(IO3)4]∞– layers are aligned, leading to large macroscopic polarization. Additionally, chemical substitution also results in a qualitative improvement in the functional properties of compound 2. It possesses strong SHG response (12 × KDP @1064 nm) and broad optical transparency, coupled with large birefringence (0.21 @1064 nm), showcasing its promise as a promising nonlinear optical (NLO) crystal. The effects of chemical substitution between F– anions and IO3– groups on the structures and properties are discussed in detail.
研究领域:
材料科学
·
晶体化学
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DOI
PubMed
高影响因子
WATER RESEARCH
·
2019
·
IF 7.913
Jiangkun Du,Guangfeng Xiao,Yanxing Xi,Xiaowei Zhu,Fan Su,Sang Hoon Kim
This study presents a novel periodate oxidation system mediated by manganese oxides for the rapid removal of aqueous contaminants. The catalytic activation of periodate on manganese oxides was demonstrated as an efficient advanced oxidation system for degradation of sulfanilamide. The reactivity of manganese oxides with different Mn valence followed the order of MnO 2 >Mn 3 O 4 >Mn 2 O 3 , all of which showed extraordinary reusability during repeated activation of periodate. Sulfanilamide was rapidly degraded along with stoichiometric transformation of IO 4 − to IO 3 − , and both processes exhibited good linear correlations with the dosage of manganese oxides. While the degradation of sulfanilamide in the MnO 2 /IO 4 − system was accelerated at lower solution pH, it was only slightly affected by ionic strength, water anions and humic acid . In contrast to the homogeneous system of Mn 2+ /IO 4 − , sulfanilamide degradation was not influenced in oxic and anoxic environment. It was evidenced by quenching studies and EPR tests that both singlet oxygen ( 1 O 2 ) and iodate radicals (IO 3 • ) were generated when the metastable Mn(IV)-O-IO 3 interacted with sulfanilamide. The XPS spectra of Mn 2p and O 1s before and after reactions indicated that the catalytic activation of periodate on MnO 2 was not in company with the redox cycling of Mn(IV) species.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2024
·
IF 0
Zhao Jingnan,Chen Junwen,Wang Qun,Xiong Renxuan,Ma Jun
As reported, the persistent toxic and harmful pollutant bisphenol A (BPA) from industrial emissions has been consistently found in aquatic environments inhabited by humans. Periodate (PI)-based advanced oxidation processes (AOPs) have been employed to degrade BPA, although activating PI proves more challenging compared to other oxidants. A novel nano iron metal catalyst, sulfided nanoscale iron-nickel bimetallic nanoparticle supported on biocarbon (S-(nFe 0 -Ni)/BC) was synthesized and utilized to activate PI for the removal of BPA. The morphology, structure, and composition of S-(nFe 0 -Ni)/BC were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy-energy dispersive spectrometer (SEM–EDS), and fourier-transform infrared spectrum (FTIR). The catalyst demonstrates an excellent ability to activate PI, achieving a BPA removal efficacy of 86.4%, accompanied by a 33% reduction in total organic carbon (TOC) in the {S-(nFe 0 -Ni)/BC}/PI system. BPA degradation exhibited a significant change at the 5-min mark. In the first stage (0–5 min), nonlinear dynamic fitting research, combined with scavenging experiments, unveiled the competitive degradation of pollutants primarily driven by iodate radical ( \({{\mathrm{IO}}}_{3}^{\cdot }\) ), singlet oxygen \(\left({}^{1}{{\mathrm{O}}}_{2}\right)\) , and hydroxyl radical ( \(\cdot {\mathrm{OH}}\) ). The competitive dynamics aligned with the ExpAssoc model. The contribution rates of different active species during the second stage (5–120 min) were calculated. The contributions of main species to BPA removal follow the order of \({{\mathrm{IO}}}_{3}^{\cdot }\) > \({}^{1}{{\mathrm{O}}}_{2}\) > \(\cdot {\mathrm{OH}}\) throughout the entire process. The influence of various parameters, such as the dosage of S-(nFe 0 -Ni)/BC, initial PI concentration, BPA concentration, pH, temperature, and the presence of coexisting anions, was also examined. Finally, a plausible reaction mechanism in the system is proposed, suggesting that the {S-(nFe 0 -Ni)/BC}/PI system involves a heterogeneous synergistic reaction occurring primarily on the surface of S-(nFe 0 -Ni)/BC. Therefore, this study proposes a promising approach for PI-based AOPs to degrade organic pollutants, aiming to mitigate the irreversible harm caused by such pollutants to organisms and the environment.
研究领域:
环境科学
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化学工程
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材料科学
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产品关联
DOI
PubMed
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