Desalination and Water Treatment
·
2024
·
IF 1
Shifeng Li,Feng Lu,Shuhua Yao,Shuyan Zang
The mesoporous goethite synthesized by the hydrothermal method was employed to remove selenate (Se(VI)) and selenite (Se(IV)) from wastewater. The adsorption data of kinetics and isotherms were determined and fitted with different models, and the potential adsorption mechanism was discussed according to X-ray photoelectron spectroscopy (XPS) analysis. The maximum adsorption capacities of Se(IV) and Se(VI) on the mesoporous goethite are 71.07 and 21.07 mg/g at 25°C, respectively, which are about two orders of magnitude higher than the natural goethite. The XPS results revealed that the Se(IV) was adsorbed on the surface of the mesoporous by the formation of the inner-sphere complex, but the outer-sphere complexes are formed with Se(IV). The meso-porous goethite is expected to be a potential adsorbent for Se removal from industrial selenium- containing wastewater on a large scale for its properties of easy-preparation and less cost compared with classic nanomaterials.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2015
·Vol. 641
·期 11
·1953-1958
·
IF 1.16
Yunsheng Liu,Dajiang Mei,Jingli Xu,Yuandong Wu
Sodium magnesium selenite NaMg 2 (OH)(SeO 3 ) 2 and rubidium zinc selenite RbZn 2 (OH)(SeO 3 ) 2 were prepared by hydrothermal reactions. The crystal structures of the title compounds were determined by single-crystal X-ray diffraction. NaMg 2 (OH)(SeO 3 ) 2 crystallizes in the orthorhombic space group Pnma (no. 62) with lattice parameters a = 13.1919(10), b = 6.0415(4), c = 8.2182(6) Å, and Z = 4 and RbZn 2 (OH)(SeO 3 ) 2 crystallizes in the triclinic space group P (no. 2) with lattice parameters a = 4.8698(5), b = 7.3446(8), c = 11.7796(12) Å, α = 82.554(3), β = 78.456(2), γ = 71.603(3)°,and Z = 2. The structure of NaMg 2 (OH)(SeO 3 ) 2 is a three-dimensional framework consisting of edge-sharing MgO 6 octahedra and trigonal pyramidal SeO 3 2– groups, whereas the structure of RbZn 2 (OH)(SeO 3 ) 2 is a two-dimensional layers structure consisting of corner-sharing [Zn 2 O 7 ] dimers linked by trigonal pyramidal SeO 3 2– groups. The compounds were characterized by the solid state UV/Vis/NIR diffuse reflectance, and FT-IR spectroscopy.
研究领域:
无机化学
·
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
Environmental Science-Nano
·
2018
·Vol. 5
·期 6
·1441-1453
·
IF 6.087
Jingmiao Wei,Wei Zhang,Weiyi Pan,Chaoran Li,Weiling Sun
Adsorption behaviors and mechanisms of selenite [Se(IV)] and selenate [Se(VI)] on two types of zirconium metal–organic frameworks (MOFs, UiO-66 and UiO-66-NH2) were investigated using batch experiments, spectroscopic analyses, and theoretical calculations. Se(IV) adsorption was substantially greater than Se(VI) adsorption. Intriguingly, with increasing solution pH, Se(IV) adsorption increased to a maximum at pH 7, whereas Se(VI) adsorption monotonically decreased. Se(IV) adsorption was not influenced by coexisting ions except for PO43−, whereas Se(VI) adsorption was in general decreased with increasing coexisting ion concentrations. The underlying molecular binding mechanisms were elucidated via zeta potential, XPS, and FTIR analyses as well as density functional theory calculations. Se(IV) formed a strong inner-sphere complex with the MOFs via Lewis acid/base complexation between the Zr coordinatively unsaturated sites and HSeO3− or SeO32− (−59.4 to −142 kJ mol−1) and hydrogen bonding between Zr–O–C and H2SeO3 (−24.4 to −29.8 kJ mol−1). Se(VI) formed outer-sphere complexes with the MOFs through electrostatic interactions (−50.6 to −62.1 kJ mol−1). Thus, the BET surface area was the predominant factor determining the Se(IV) adsorption, whereas both the surface charge and BET surface area controlled the Se(VI) adsorption. This study provided new insights on the molecular interactions between Se(IV) and the MOFs, and revealed the distinct differences between the Se(IV) and Se(VI) adsorptions.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Food Analytical Methods
·
2021
·Vol. 14
·期 7
·1345-1358
·
IF 3.366
Wei Yihua,Zhang Jinyan,Qiu Shuyan,Huang Qingqing,Yuan Linfeng,Chen Liumeng,Dai Tingcan,Tu Tianhua,Zhang Biaojin,Yan Han,Li Weihong
A simple, rapid, and accurate method for determination of selenocystine (SeCys 2 ), methyl selenocysteine (MeSeCys), selenourea (SeUr), selenite (Se(IV)), selenotmethionine (SeMet), and selenate (Se(VI)) in grain crops was developed, based on the coupling of ion-pair reversed-phase high-performance liquid chromatography (IP-RP-HPLC) and ultraviolet irradiation hydride generation atomic fluorescence spectrometry (UV-HG-AFS). The conditions of IP-RP-HPLC-UV-HG -AFS were studied. The conditions of the pretreatment sample, such as types and dosage of proteinases, were investigated. The detection limits (LODs) for six Se species were between 0.77 and 1.77 μg·L −1 . Then, the proposed method has been successfully used to analyze selenium (Se) species in Se-enriched rice paddy ( Oryza sativa L. ), soybean ( Glycine max (Linn.) Merr. ), and sweet potato ( Ipomoea batatas (L.) Lam. ) with foliar application of sodium selenite solution. SeMet was the major Se spices in Se-enriched grain crops, ranged from 77–90% of the total Se contents. The capabilities of Se enrichment were relatively larger differences in three-grain corps as follows: soybean > rice paddy > sweet potato.
研究领域:
植物学
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分析化学
·
营养学
✓ 已验证
产品关联
DOI
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2017
·Vol. 643
·期 16
·1082-1087
·
IF 1.144
Chen Shen,Dajiang Mei,Chuanling Sun,Yunsheng Liu,Yuandong Wu
The selenites, Na 2 Be 3 (SeO 3 ) 4 · H 2 O and Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 , were synthesized under hydrothermal conditions. The crystal structures of Na 2 Be 3 (SeO 3 ) 4 · H 2 O and Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 were determined by single-crystal X-ray diffractions. Na 2 Be 3 (SeO 3 ) 4 · H 2 O crystallizes in the triclinic space group P 1 (no. 2) with unit cell parameters a = 4.8493(9), b = 12.013(2), c = 12.077(2) Å, and Z = 2, whereas Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 crystallizes in the monoclinic space group C 2/ m (no. 12) with lattice cell parameters a = 12.596(6), b = 7.297(4), c = 16.914(8) Å, and Z = 2. Na 2 Be 3 (SeO 3 ) 4 · H 2 O features a three-dimensional open framework structure formed by BeO 4 tetrahedra and SeO 3 trigonal pyramids. Na cations and H 2 O molecules are located in different tunnels. Cs 2 [Mg(H 2 O) 6 ] 3 (SeO 3 ) 4 has a structure composed of isolated [Mg(H 2 O) 6 ] octahedra and SeO 3 trigonal pyramids interacted by hydrogen bonds, and Cs cations are resided in-between. Both compounds were characterized by thermogravimetric analysis and FT-IR spectroscopy.
研究领域:
无机化学
·
材料科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Guiping Liao,Jin Luo,Tengfei Cui,Jie Zou,Mian Xu,Yuhan Ma,Lingsheng Shi,Jia Jia,Chen Ma,Hui Li,Fujian Xu
Herein, a label-free, sensitive, and selective fluorescence method for the detection of trace selenite (Se(IV)) in water sample by carbon dots (CDs) was reported. The fluorescence CDs probe was simply and rapidly synthesized within 4 min by microwave-assisted pyrolysis of citric acid and 3,3′-diaminobenzidine (DAB), with a relatively uniform size of approximately 2.6 nm. The fluorescence emission of as-prepared CDs was 450 nm upon the excitation of 400 nm with a quantum yield of about 8% against quinine sulfate as reference standard, which can be quenched by the addition of selenite. Benefit from the strong surface chelating reaction between DAB and Se(IV), the proposed sensor owned the advantage of high sensitivity (limit of detection = 0.5 ng/mL), wide linear range (1–100 ng/mL range, relative standard deviation: 3.8%), and excellent selectivity in the presence of various ions, even other forms of selenium, including selenate (Se(VI)), Selenomethionine (SeMet), and L-Selenocystine (SeCys) etc. Preliminary study on fluorescence quenching mechanism studied. The sensor was successfully exemplified for real water samples and exhibits comparative performance.
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Chengyang Zhang,Guoyang Zhang,Jiyuan Jin,Hongcen Zheng,Zhiwei Zhou,Shujuan Zhang
The coexistence of selenite (Se(IV)) and acetylacetone (AA) generated a synergistic effect on the growth inhibition of a bloom-forming cyanobacterium, Microcystis aeruginosa. The mechanism behind this phenomenon is of great significance in the control of harmful algal blooms. To elucidate the role of Se(IV) in this effect, the reactions in ternary solutions composed of Se(IV), AA (or two other similar hydrogen donors), and quinones, especially benzoquinone (BQ), were investigated. The transformation kinetic results demonstrate that Se(IV) played a catalytic role in the reactions between AA (or ascorbic acid) and quinones. By comparison with five other oxyanions (sulfite, sulfate, nitrite, nitrate, and phosphate) and two AA derivatives, the formation of an AA-Se(IV) complexation intermediate was confirmed as a key step in the accelerated reactions between BQ and AA. To our knowledge, this is the first report on Se(IV) as a catalyst for quinone-involved reactions. Since both quinones and Se are essential in cells and there are many other chemicals of similar electron-donating properties to that of AA, the finding here shed light on the regulation of electron transport chains in a variety of processes, especially the redox balances that are tuned by quinones and glutathione.
研究领域:
环境科学
·
微生物学
·
生态学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Lingyang Yao,Huan Tian,Zhengyu Bao,Shuyun Xie,Tao Feng,Min Sun,Hui Ma,Lingyun Yao,Qiangjun Lang
In this study, four Se species including selenite [Se (VI)], selenate [Se (VI)], potassium,2-selenocyanatoacetate (PSeCA), and selenium ore powder (SeOP) were used for biofortification of Pleurotus geesteranus to obtain Se-enriched mushroom. Based on their effects on mycelium growth of P. geesteranus Jinxiu, [Se (VI)] in the concentration range of 100–1000 μg/kg and other three Se species in the range of 100–2000 μg/kg were adopted in spawn running and fruiting body growth stage, with their effects on production yield and elements accumulation evaluated. The results revealed that PSeCA treatment (200 μg/kg) had the highest fruiting body production (290.61 g/bag), followed by 2000 μg/kg of SeOP treatment (286.24 g/bag). SeMet revealed to be dominant species detected in mushroom, with [Se (VI)] exhibited the highest biological efficiency among the four Se species, and 2000 μg/kg of PSeCA treatment exhibited the highest Se content (10.25 mg/kg) in terminal phase of fruiting body. The results suggested that high concentration of PSeCA would be more favored for the Se biofortification. Moreover, Se treatment could greatly alter the mineral elements content of fruiting bodies, both synergistic and antagonistic relationships on accumulation of mineral elements were observed for each tested Se species.
研究领域:
真菌学
·
农业生物技术
·
环境科学
·
营养科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2024
·
IF 5.3
Jingxuan Lu,Juan Li,Shiyan Fu,Huanhuan Tan,Yuhui Hao
The combined chemotoxicity and radiotoxicity associated with uranium, utilized in nuclear industry and military applications, poses significant threats to human health. Among uranium pollutants, uranyl is particularly concerning due to its high absorptivity and potent nephrotoxicity in its + 6 valence state. Here, we have serendipitously found Na 2 SeO 3 facilitates the conversion of U(VI) to U(IV) precipitates. A novel approach involving nano-chitosan loaded internally with melatonin and externally modified with selenite (NPs Cs-Se/MEL) was introduced. This modification not only enhances the conversion of U(VI) to U(IV) but also preserves the spherical nanostructure and specific surface area, leading to increased adsorption of U(VI) compared to unmodified samples. Selenite modification improves lysosomal delivery in HEK-293 T cells and kidney distribution of the nanoparticles. Furthermore, NPs Cs-Se/MEL demonstrated a heightened uranium concentration in urine and exhibited remarkable efficiency in uranium removal, resulting in a reduction of uranium deposition in serum, kidneys, and femurs by up to 52.02 %, 46.79 %, and 71.04 %, respectively. Importantly, NPs Cs-Se/MEL can be excreted directly from the kidneys into urine when carrying uranium. The results presented a novel mechanism for uranium adsorption, making selenium-containing nano-materials attractive for uranium sequestration and detoxification.
研究领域:
环境科学
·
毒理学
·
纳米医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 41
·19712-19721
·
IF 3.925
Wenxian Wang,Yufei Zhou,Dan Yang,Xianfen Zhang,Lijiao Guan,Yuding Zhang,Saipeng Huang
Selenite (SeO32−), as the most toxic form of selenium in water, is a great threat to water quality and human health, which also has been closely associated with various physiological and pathological processes. The sensitive detection and quantification of SeO32− are imperative for the early diagnosis and prevention of selenite-associated disease. Herein, we constructed novel o-phenylenediamine functionalized carbon quantum dots (OPD-CQDs) by a one-step hydrothermal method. The OPD-CQDs exhibited good water solubility, high quantum yield, strong photostability, excellent biocompatibility and cell imaging capabilities, and also displayed high selectivity and sensitivity to SeO32− with an excellent linear relationship and a low limit of detection (86 nM). Moreover, the OPD-CQDs were successfully employed for the quantitative determination of SeO32− in tap water and human serum with high accuracy and recovery rate. In particular, the designed OPD-CQDs were successfully applied for intracellular SeO32− detection with excellent biocompatibility and cellular imaging capability. The present research demonstrated that OPD-CQDs provided a novel approach for imaging and detecting SeO32− in live cells and in vivo. Based on these excellent properties and comprehensive applications, OPD-CQDs illustrated great potential to offer a scientific and effective method for SeO32− detection in complex environments and clinical early diagnosis of SeO32− related diseases.
研究领域:
环境科学
·
生物医学
·
分析化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2021
·
IF 6.498
Lixun Zhang,Sunny C. Jiang,Yuntao Guan
The discovery of cheap and eco-friendly functional materials for the removal of anionic heavy metal ions is still challenging in the treatment of heavy metal-contaminated water. Herein, a new poly(allyltrimethylammonium) grafted chitosan and biochar composite (PATMAC-CTS-BC) was introduced for the removal of selenate (SeO 4 2− ) in water. Results suggest that the PATMAC-CTS-BC showed a rapid removal of SeO 4 2− with efficiency of >97% within 10 min and it followed a pseudo-second-order model. High capacity of SeO 4 2− adsorption by the composite was achieved, with maximum value of 98.99 mg g −1 based on Langmuir model, considerably higher than most of reported adsorbents. The thermodynamic results reflected the spontaneous and exothermic nature of SeO 4 2− adsorption onto the composite. The composite could be applied at a wide initial pH range (2–10) with high removal efficiency of SeO 4 2− because of permanent positive charges of quaternary ammonium groups (=N + –). The removal mechanisms of SeO 4 2− were mainly attributed to electrostatic interactions with =N + – and protonated –NH 3 + groups, and redox-complexation interactions with –NH 2 , –NH–, and –OH groups. Besides SeO 4 2− , the hexavalent chromium (Cr 2 O 7 2− ) was considered as example to further demonstrate the anion removal capability of cationic hydrogel-BC composite. The study outcomes open up new opportunities to efficiently remove anionic heavy metal ions (e.g., SeO 4 2− and Cr 2 O 7 2− ) in water using these materials.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 45
·16920-16926
·
IF 4
Qiuyuan Feng,Zhixia Gao,Ketian Hou,Jialong Wang,Hong Du,Qun Jing
Two new selenites, K2Zn3Se4O12 (compound 1) and K4Zn3V4Se2O19 (compound 2), have been successfully synthesized by solid-state reactions in vacuum tubes. Compound 1 consists of a three-dimensional (3D) framework with [SeO3] triangular pyramids and [ZnO4] tetrahedra in the monoclinic space group P21/c (No. 14). Compound 1′s cut-off edge is below 344 nm, based on its UV-Vis-NIR diffuse reflectance studies, and theoretical calculations indicate a birefringence of around 0.043 at 1064 nm. The two-dimensional layer of compound 2, in contrast, is made up of [SeO3] triangular pyramids, [ZnO4] tetrahedra, and [V4O13] tetrahedra. It crystallizes in the monoclinic space group C2/c (No. 15). Its UV-Vis-NIR diffuse reflectance studies demonstrate that the compound's cut-off edge is lower than 330 nm.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）