PLANT AND SOIL
·
2025
·
IF 4.1
Luo Jie,Zhang Qin,Chen Xiulong,Zhou Kai,Zhou Jiahui,Zhao Xiaomin
Background and Aims The heap leaching technique causes considerable damage to environment during the mining of ionic rare earth ore in southern China. Restoration of abandoned mining sites into arable land requires determination of the contents of rare earth elements (REEs) and non-rare earth toxic elements in soil and crops. Methods In the present study, five treatments, including rare earth tailings without any amendment or navel orange cultivation (RET), biochar and fly ash combined with three organic fertilizers (cow manure organic fertilizer [CF], pig manure organic fertilizer [PF], sugarcane bagasse organic fertilizer [SF]), and a treatment without any amendments (CK) were arranged to explore the effects of different treatments on rare earth and non-rare earth toxic elements contents in soil and crops. Results Total EDTA-extractable concentrations of REEs in CF, PF, and SF soils were 42.8%, 26.7%, and 30.5% lower than that those in CK, respectively. Total EDTA-extractable concentrations of non-REEs in the CF, PF, and SF, soils were significantly higher than those in the CK, with the highest in PF, at 337.5%. Compared with CK, all treatments reduced total REEs in navel orange leaves, peel, and pulp. Besides, total rare earth and non-rare earth toxic elements contents in the pulp of the all-treatments navel oranges were all lower than the pollutant limit values for food. Conclusions Use of biochar, fly ash, and SF is the optimal strategy for improving ionic rare earth tailings soil, and navel orange cultivation, is a potential strategy for remediating such abandoned mining sites.
研究领域:
环境科学
·
土壤科学
·
农业科学
·
地球化学
·
植物科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Weiying Li,Li Liang,Yue Li,Yu Tian,Jiping Chen,Sheng Chen,Junpeng Zhang
Recently, EDTA-chelated Cd II (Cd II -EDTA) was effectively removed by sulfidated nanoscale zero-valent iron (S-nZVI). However, few studies have been performed to investigate the influence of co-existing ions and emerging contaminants (such as microplastics) on the performance of S-nZVI toward Cd II -EDTA, which is vital for the application of S-nZVI in practical wastewater treatment. In this study, the individual effects of different co-existing ions (NO 3 − , SO 4 2− , PO 4 3− , Mg 2+ , Cu 2+ , and Zn 2+ ) and polystyrene (PS) microplastics with different concentrations on the removal of Cd II -EDTA by S-nZVI were systematically investigated. The removal capacity of S-nZVI toward Cd II -EDTA fell in the range of 579.3–644.7, 612.3–670.2, 607.4–691.3, 533.3–623.6, 79.9–545.3, 544.3–631.7, and 568.6–663.8 mg/g for the presence of NO 3 − , SO 4 2− , PO 4 3− , Mg 2+ , Cu 2+ , Zn 2+ , and PS microplastics over the concentration range of 10.0–150.0 mg/L, respectively, which were all smaller than that of the system of Cd II -EDTA alone (746.6 mg/g), indicating that all of the investigated co-existing substances showed inhibitory effects on Cd II -EDTA removal. As for NO 3 − , SO 4 2− , or Mg 2+ -containing system, the inhibitory effect was ascribed to the influence of S-nZVI corrosion rate; As for PO 4 3− , Mg 2+ , Cu 2+ , Zn 2+ , or PS microplastics-containing system, the negative effect was caused by changing the corrosion of S-nZVI and occupying the reactive sites at the surface of S-nZVI. The final corrosion products of S-nZVI under different reaction conditions were strongly dependent on the species and concentration of co-existing substance with the combinations of γ-FeOOH, α-Fe 2 O 3 , FeO, or β-FeOOH as the dominant corrosion products.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Haoyu Yue,Zhijie Shang,Pan Xu,Dongyue Feng,Xinxue Li
A novel EDTA functionalized chitooligosaccharide/sodium alginate/Ca 2+ physical double network hydrogel (ECSDNH) was prepared by using of high-salinity oilfield produced water. The formation and structure of ECSDNH were characterized by FT-IR and SEM. Various factors, including EDTA functionalized chitooligosaccharide content, pH of solution, initial concentration of heavy metal ions, temperature and contact time, were thoroughly investigated to explore their effect on adsorption capacity of ECSDNH. The obtained results showed that ECSDNH had higher adsorption capacity for Zn 2+ , Ni 2+ and Mn 2+ . The maximum adsorption capacities of Zn 2+ , Ni 2+ and Mn 2+ were 160.19 mg/g, 72.67 mg/g and 52.43 mg/g at 298 K, respectively. The pseudo-second-order kinetic model and Langmuir isotherm model fit the experimental data fairly well. The thermodynamic parameters of the adsorption, Δ H ° , Δ S ° , and Δ G ° , were also calculated. In addition, the ECSDNH still had higher removal efficiency for three metal ions after three adsorption-regeneration cycles, indicating its potential application for removing heavy metal ions from wastewater.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Hao Wang,Yanju Wei,Jitong Wang,Donghui Long
Submicrometer-sized LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM111) crystals with homogeneous composition are prepared via a polymer-chelation chemical solution process. The complexed chelate agents of ethylenediaminetetraacetic acid (EDTA) and polyethyleneimine (PEI) could chelate all metal ions in one step, with intimate mixing at the atomic level, ensuring a homogeneous ion distribution in the product. The as-prepared NCM111 crystals have a narrow particle size distribution with an average size of 250 nm, which can effectively shorten the lithium ion diffusion path. In addition, the NCM111 crystals majorly consist of electrochemically active {010} facets and low Li + /Ni 2+ cation mixing, thus delivering a high reversible discharge capacity of 156.1 mAh g −1 after 100th cycles and good rate capability of 102.7 mAh g −1 at 10 C. Furthermore, it is found that the induction of excess Li could deteriorate the rate capability and increase the Li + solid-state diffusion resistance. However, Al 3+ doping could effectively improve the cycling performance, while Nb 5+ doping could increase significantly the discharge capacity as well as rate capability. Owing to the flexibility of the chelating chemistry , the synthesis should be extended to prepare other multicomponent single-crystal cathodes with homogeneous composition and desired substation.
研究领域:
材料科学
·
化学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
Chemical Engineering Journal Advances
·
2021
·
IF 0
Weifeng Chen,Guo Lv,Xiang Liu,Jiaying Yan,Qichun Zhang,Dong-Sheng Li
Although a few “on–off” approaches such as the pH-adjusting, temperature-adjusting, and controlling by light upon photo-catalysts have been reported, the “on–off” control of the on-broad and on-demand hydrogen production still faces many challenges. Herein, we first report the usage of Zn 2+ /EDTA-2Na system as an unprecedented, universal, high-efficient, and reusable “on–off” switch for the on-demand H 2 evolution upon the hydrolysis of ammonia borane, sodium borohydride and dimethyl aminoborane. This “on–off” switch has been demonstrated to be efficient and reusable in various heterogeneous and homogeneous metal catalysts for on-demand H 2 evolution. The detailed characterizations have confirmed that Zn 2+ ions attached and located at the surface of catalyst, covered its active sites on the surface, and turned off the H 2 production. The H 2 generation was switched on by the addition of EDTA-2Na, due to its strong coordination ability with Zn 2+ ions. In addition, the Zn 2+ /EDTA-2Na switch has been successfully reused several times without any activity loss in the “on–off” control of H 2 evolution. This switch is of great importance in the practical application for highly efficient, on-site and on-demand H 2 evolution under ambient conditions.
研究领域:
氢能
·
催化
·
材料科学
·
化学工程
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Tao Wang,Qing Zhang,Zhongjing Zhao,Lu Zhang,Baoshan Xing
Currently, identification and regulation of adsorption sites of carbon-based materials remain a major challenge. In this study, given the properties of the target contaminant, bisphenol A (BPA), we report a novel method for preparing ultra edge N-doped hierarchically porous carbon-based material with rich vacancy defects (HENDC) via a direct pyrolysis of simultaneous EDTA-4Na and g-C 3 N 4 . Interestingly, g-C 3 N 4 kills three birds with one stone, including pore-forming agent, nitrogen configuration regulator, and structural defect former. As such, compared with that of MNDC, which was direct pyrolysis of EDTA-4Na (462.5 mg g −1 for BPA and 551.2 mg g −1 for bisphenol S (BPS)), the adsorption capacity of HENDC for BPA was 870.1 mg g −1 , which exceeded that for BPS (793.3 mg g −1 ). Also, HENDC shortened the adsorption process to 10 min for BPA compared with MNDC (30 min) and displayed a promising environmental application potential. Based on experiments and theoretical calculations, the high adsorption performance of HENDC for BPA originated from edge nitrogen doping, defect inducing, and hierarchically porous structures. Specifically, Lewis acid-base interactions of varying strength occurred between both pyridinic-N (stronger) and pyrrolic-N (weaker) with BPA. A strong π-π EDA interaction between pyridinic-N and BPA, which was further facilitated by vacancy defects in adjacent edge nitrogen. The hydrophobic effect promoted the interaction between pyrrolic-N and BPA. This work offers deep insights into effective and selective removal of BPA, suggesting new strategies for exploring cost-effective carbon-based adsorbents.
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
FOOD HYDROCOLLOIDS
·
2020
·
IF 7.053
Xin-Sheng Qin,Zhi-Gang Luo,Xiao-Lin Li
In this study, we demonstrated the role of W 1 /O/W 2 double emulsion with alginate-Ca-EDTA system on the gastrointestinal digestion viability of Lactobacillus Plantarum strain liquid. The W 1 /O/W 2 double emulsion was prepared by WPI-EGCG covalent conjugate nanoparticles with compartmented multiple-emulsion nature. The effects of preparation parameters containing polyglycerol polyricinoleate content, oil fraction, and WPI-EGCG covalent conjugate particle concentration on the formation of W 1 /O/W 2 double emulsions were systematically studied. Then, the rheological properties of alginate-Ca-EDTA system in the external aqueous phase of the W 1 /O/W 2 double emulsions as the pH changes were investigated. The W 1 /O/W 2 double emulsion maintained in the hydrogel state at pH below 4.0 because of Ca 2+ coupled with G residues of alginate . In contrast, the W 1 /O/W 2 double emulsion transformed to solution state at neutral pH condition, which caused the dissociation of Ca 2+ from the Ca-alginate hydrogel and resulted in Ca-EDTA chelation. A pH-sensitive carrier based on an alginate-Ca-EDTA system in a set-type W 1 /O/W 2 double emulsion model was exploited by regulating the release of Ca 2+ . Based on the pH-sensitive alginate-Ca-EDTA system and middle oil phase resistance, such a double emulsion supplied a colon-targeted release carrier for the Lactobacillus Plantarum strain liquid encapsulation into inner aqueous phase with the functional protection effect. The results offer a promising strategy for probiotics strain liquid encapsulation of double emulsion delivery systems in oral applications of foods (such as yogurt, fruit juice or cheese) and pharmaceuticals.
✓ 已验证
产品关联
DOI
高影响因子
COMPUTERS AND ELECTRONICS IN AGRICULTURE
·
2026
·
IF 10.3
Liru Yan,Bianxiang Zhang,Wei Zhou,Chao Feng,Caihong Zhang,Yan Zhang,Shaomin Shuang,Lihong Shi
Highly-intelligent user-friendly sensing strategies are becoming desperately demanded and indispensable in under-developed nations and resources-insufficient areas. Herein, an intelligent sensing platform has been successfully established incorporating smartphone with machine vision and deep learning function, 3D-printed handheld device, and paper microfluidic chip stained with tri-emission ratiometric-fluorescence (FL) carbon dots (TCDs). The intelligent system can quantify zinc ion (Zn 2+ ) and ethylenediaminetetraacetic acid (EDTA) only through a single-step operation on smartphone. TCDs, engendering bright blue and cyan FL as well as weak red one at 370 nm excitation, were prepared hydrothermally using tartaric acid and alizarin carmine. As-prepared TCDs exhibit continuous FL color transformation from blue to purple to blue with the addition of Zn 2+ and EDTA. Subsequently, TCDs-based paper chip is explored to enable field-portable sequential discrimination of Zn 2+ and EDTA. Intriguingly, the proposed sensor is utilized for fast and intelligent quantification of Zn 2+ and EDTA in soil filtrate, plant sap and tap water with a low detection limit of 3.8 μM and 7.9 μM, as well as wide linear correlations of 0–280 µM and 0–560 µM, respectively. It is eagerly anticipated that our methodologies will become the strong impetus for new round of technological transformation for analyte assay.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 14
·147520
·
IF 3.721
Xinyi Wang,Liubing Kong,Shuqi Zhou,Tao Liang,Hao Wan,Ping Wang
Photoluminescence (PL) sensors based on quantum dots (QDs) are difficult to achieve exact detection in sample waters. In this paper, polyvinyl alcohol (PVA) based CdTe/ZnS/CdS QDs and fluorescein isothiocyanate (FITC) fluorophores were used to build a ratiometric PL sensor. Combining with the homemade smartphone-based PL E-eye, the Cd2+ exact detection can be achieved. PVA was used to connect QDs and FITC fluorophores without unnecessary ligand exchange and purification. For QDs fluorophore, ethylenediaminetetraaceticacid (EDTA) was used on the surface to induce the specifically Cd2+ recognition site. For FITC fluorophore, the PL remains unchanged in this experiment. Thus, the ratio of two fluorophores can be used to provide a built-in correction. The PL changes with the increase of Cd2+ concentrations could be displayed as a visual color change on the smartphone. Further quantitative analysis could be carried out by the RGB value of the picture through the App in less than 1 min The ratio of R/G is linear to Cd2+ concentration in the range of 1–2000 μg l−1 with a low LOD of 0.057 μg l−1 (S/N). Compared with traditional analysis methods, the PL ratiometric method with PL E-eye is portable, rapid, visible and highly selective especially in discriminate Cd2+ from Zn2+.
研究领域:
环境科学
·
分析化学
·
纳米技术
·
光学传感
✓ 已验证
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Aniu Qian,Anning Song,Hao Wu,Zhenzhen Du
Faradic capacitive deionization (CDI) has emerged as an ideal candidate for developing effective water purification from low-concentration desalinated water. However, long-term desalination-stability CDI still faces the challenge in unstable electrode microstructure after hundreds of ion intercalations. Herein, ethylenediaminetetraacetic acid (EDTA)-modified Ti 3 C 2 T x (denoted as EDTA-Ti 3 C 2 T x ) electrodes are proposed through intense chemical interactions without scarifying Ti 3 C 2 T x electronic conductivity, wherein the formed –COO-terminated bridge stabilizes Ti 3 C 2 T x interlayer spacing for strengthening long-term regeneration desalination. Simultaneously, abundant Na + adsorption sites with highly hydrophilic surface in the binder-free high-conductivity EDTA-Ti 3 C 2 T x accelerated ion electro-sorption with efficient ion permeations. Importantly, in 500 mg L −1 NaCl solutions, EDTA-Ti 3 C 2 T x //activated carbon (AC) assembled CDI device delivered an extremely stable adsorption/desorption with salt adsorption-capacity (SAC) retention of 83 % after 500 cycles and a high desalination capacity of 51.0 mg g −1 . In addition, the EDTA-Ti 3 C 2 T x presented without d -spacing changes after 100 cycle desalinations that was significantly different from structural collapse in Ti 3 C 2 T x . This study offers a new idea to overcome poor electrochemical desalination stability via organic molecules stabilized Ti 3 C 2 T x structure.
研究领域:
环境科学
·
材料科学
·
水处理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）