Journal of the Taiwan Institute of Chemical Engineers
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2022
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IF 5.477
Tianhao Han,Weiwei Chen,Yawen Cai,Zhimin Lv,Yifeng Zhang,Xiaoli Tan
Background Due to the randomly distributed nature of uranium contamination, remediation strategies often concentrate on in-situ immobilization. Limestone can limit the migration of uranium through its spontaneous replacement reaction with phosphate, and achieve uranium immobilization. Methods In this study, the immobilization of uranium in the deposition process of hydroxyapatite was investigated. The effect of carbonate concentration on the reaction process was studied by adding Na 2 CO 3 . Significant findings The deposition process is accompanied by the immobilization of uranium by co-precipitation. The immobilization (92.6%) of uranium (0.52 mmol/L) is due to the formation of calcium uranyl phosphate, increasing carbonate concentration has a significant inhibitory effect on uranium immobilization, and the 50 Mm carbonate can reduce the uranium immobilization efficiency by nearly 20%. XRD, FTIR, Raman, XPS, EA and fluorescence spectroscopy proved that co-precipitation, complexation, and encapsulation were the main mechanisms of uranium immobilization. Through determining the ratios of type-A and type-B substitutions, it reveals the immobilization of uranium weakens due to the competition of carbonate and phosphate. Our study provides the deposition of uranium in the geosphere should be taken into account for remediation and radioactive pollution disposal.
研究领域:
环境科学
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放射性污染治理
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DOI
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Rui Xu,Jie Yin,Lan Li,Ruchen Hong,Yan Chen,Qing Zhao,Yuan Zhou,Ting-ting Huang,Jin-xin Lin
The implantation of 3D-printed scaffolds for bone repair could be ineffective due to the early inflammatory response. In this work, porous amorphous calcium phosphate (ACP) nanospheres were employed to not only load quercetin (Que) but also mix with octacalcium phosphate (OCP) to form biphasic calcium phosphate (BCP). Afterward, the drug-loaded nanospheres (AQ) were combined with BCP and sodium alginate (SA) to fabricate the AQ-BCP/SA scaffolds with an interconnected structure for solving the anti-inflammatory challenge and thus promoting osteogenesis. The scaffolds obtained excellent mineralizing properties due to the interaction of ACP and the OCP in the component. Additionally, the stable and continuous release of Que enabled the scaffolds to synergistically induce osteogenesis and immunoregulation. The scaffolds were capable of directly promoting osteogenic differentiation in vitro by upregulating the expression of related genes Runx2, ALP, BMP2, and OCN. Meanwhile, they were also demonstrated to be beneficial in immunoregulation by inducing macrophages to transform into M2 polarization rather than M1 polarization. In vivo evaluation also confirmed the significant osteogenic and immunoregulatory effects of the scaffolds, which were helpful for ideal bone repair. Thus, the AQ-BCP/SA scaffolds have the potential to be applied in the future bone tissue engineering area.
研究领域:
组织工程
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生物材料
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生物医学工程
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骨科
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免疫学
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产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2023
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IF 6.4
Mengxing Ge,Deqiao Xie,Youwen Yang,Huixin Liang,Chen Jiao,Yun Ye,Junnan Wu,Hanjiao Yu,Zongjun Tian
Biodegradable bone grafts have gained considerable attention in the field of clinical research as they can be used to avoid re-surgery to remove scaffolds. We fabricated biodegradable composite ceramic scaffolds using magnesium oxide and calcium phosphate following the vat photopolymerization technology. We studied the effects of different magnesium oxide content on the process of in vitro degradation of the composite scaffolds and discussed the degradation process by comparing the extent of degradation realized in Tris-HCl buffer and simulated body fluids. We also explored the variations in the mechanical properties of the scaffolds during degradation. The results revealed that the composite scaffolds maintained the strength standard for spongy bone (compressive strength σ: 2–20 MPa) even after 28 d of degradation. Additionally, the strength of the composite scaffold containing 80 wt% magnesium oxide was comparable to the strength standard recommended for cortical bones (σ: 100–200 MPa). Controllable degradation rates were recorded, and acceptable mechanical properties were observed for these scaffolds during degradation. The results reported herein can be potentially used to expand the application prospects of biodegradable scaffolds.
研究领域:
生物材料学
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医学工程
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组织工程
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DOI
高影响因子
Journal of Water Process Engineering
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2020
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IF 3.465
Zhenxuan Li,Mengxiao Guo,Xiaowen Sun,Lucheng Li,Xiaolan Guo,Lidong Huang,Jiangtian Xiao,Defu Xu,Dagang Liu
The excess phosphate and tetracycline (TC) in natural environments potentially threatens ecosystem. Few studies were conducted on efficient and cost-effective method for dealing with these pollutants together. we attempted to reutilize this abandoned calcite for the removal of other pollutant in wastewater, such as tetracycline. Firstly, removal of high concentration phosphate by calcite was studied in batch experiments. Thereafter, removal of TC by this used calcite (P-loaded calcite) was investigated under different conditions: pH, phosphate concentration, dried state and humid state. Using calcite for high concentration phosphate removal, the results showed that (1) concentrations of phosphate higher than 30 mg.L −1 , resulted in a significant phosphate precipitation on calcite surface at both pH7.7 and pH 8.3 within 24 h. The corresponding pH and calcium results confirmed this precipitation occurrence; (2) the precipitated phase was supposed to be amorphous calcium phosphate through the results of IR, XPS, XRD and BET analysis. Compared to that by pure calcite, the TC removal rate by P-loaded calcite increased significantly with the initial phosphate concentration in both cases of Humid Experiment and Dried Experiment . This may be attributed to the adsorption of TC on the precipitated amorphous calcium phosphate, which has a larger specific surface and increasingly generates > Ca + sites. From the similarity of TC removal rate by P-loaded calcite between pH7.7 and pH 8.3, it is hypothesized that TC removal is due to TCH 2 ° and TCH- adsorption on > Ca + sites. The minor difference of TC removal rate by P-loaded calcites between Humid Experiment and Dried Experiment is mainly due to slight dissolution of precipitated amorphous calcium phosphate. Our research will serve as reference knowledge for the reutilization of abandoned calcite in phosphate removal, which provides a new way to reduce the wasted materials and environmental risks induced by tetracycline.
研究领域:
环境科学
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污染控制
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DOI
高影响因子
CARBOHYDRATE POLYMERS
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2019
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IF 6.044
Huihui He,Changyu Shao,Zhao Mu,Caiyun Mao,Jian Sun,Chaoqun Chen,Ruikang Tang,Xinhua Gu
Chondroitin sulfate (CS) is widespread in mineralized tissues and is considered to play crucial roles during the mineralization process. However, its role in biomineralization remains controversial. In the present study, CS is immobilized to collagen fibrils to mimic its state in biomineralization. The results demonstrate that immobilized CS on collagen fibrils accelerates calcium phosphate nucleation and significantly promotes collagen mineralization by accumulating calcium ions in collagen fibrils. The stochastic optical reconstruction microscopy results confirm that CS gives the specific nucleation sites for calcium phosphate to preferentially form, the improved intrafibrillar heterogeneous nucleation of calcium phosphate facilitates intrafibrillar mineralization. It is found remarkably accelerated remineralization of CS immobilized demineralized dentin is achieved. This study offers insight on the understanding of the function of the biomacromolecule CS on the biomineralization front. In addition, CS effectively promotes intrafibrillar mineralization, which highlights fine prospect for CS to reconstruct collagen-mineralized tissues as a natural material.
研究领域:
生物材料学
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骨生物学
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牙医学
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DOI
高影响因子
Environmental Technology & Innovation
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2023
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IF 7.1
Lianpeng Sun,Yuhao Yang,Weifang Yuan,Xueya Wu,Zikun Cui,Hao Wang,Huanzhong Deng,Xinzhe Zhu,Ruohong Li
The practical phosphorus recovery process lacks a useful tool to predict the purity of struvite production, identify the precipitation species and evaluate the influence of impurities on struvite formation. This study developed an integrated struvite purity prediction process based on response surface methodology (RSM) and Visual Minteq combination. The integrated process combined the advantages of the RSM and chemical equilibrium model to predict the purity during the recovery of struvite and identify the impurities in the recovered products. The second-order polynomial models were established by RSM to predict the nitrogen and phosphorus removal efficiency, and struvite purity in the presence of calcium. Visual Minteq was used to simulate precipitation process of impurity groups based on 528 different reaction conditions. Each reaction condition was verified by the RSM results. The precipitation group including struvite, CaHPO 4 , MgHPO 4 , brucite, and Ca 8 H 2 (PO 4 ) 6
⋅ 5H 2 O, with the smallest Z-score root mean square error weighted mean (-0.43), was most suitable for predicting the formation of struvite. The importance of the 5 possible precipitation combinations is ranked. The integrated process reduces the deviation of the prediction results from the reality and provides a useful tool to predict and optimize the quality of recovered products in the field of practical phosphorus recovery process.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2019
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IF 4.959
Zeqin Cui,Yakai Zhang,Yinlong Cheng,Dianqing Gong,Wenxian Wang
Magnesium alloy (ZK61) and beta-tricalcium phosphate (β-TCP) composite ZK61/ x β-TCP ( x = 0, 5, 10, 15 wt%) are fabricated using spark plasma sintering (SPS). In this study, the microstructure, mechanical properties, degradation behavior in simulated body fluid and cytotoxicity tests of composite were investigated. The results show that when the content of β-TCP was 5 wt%, which could be evenly distributed on the boundary of ZK61 particles. But agglomeration phenomenon appeared when the content of β-TCP reached 15 wt%. The hardness and the compressive strength increase with increasing of β-TCP content, and ZK61/15β-TCP achieves a maximum Vickers hardness of 94.81 HV 0.1 and compressive strength of 402 ± 9 MPa. The immersion tests indicate that corrosion resistance of the composites are better than that of ZK61 matrix, especially ZK61/5β-TCP. Corrosion products of the composite surface are mainly Mg(OH) 2 , HA and Ca 3 (PO 4 ) 2 . The cytotoxicity tests indicate that composite extracts have no toxicity to L-929 cells. These results suggest that ZK61/ x β-TCP composites are promising candidate for degradable implant materials.
研究领域:
生物医学工程
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材料科学
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组织工程
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产品关联
DOI
PubMed
高影响因子
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
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2024
·Vol. 25
·期 1
·e2023GC011111
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IF 2.9
Jianlin Liao,Jieyun Chen,Xiaoming Sun,Yinan Deng,Yanjingyu Wang,Dajin Wang,Gang Hong,Lukas Klose,Andrea Koschinsky
Increasing interest in high-tech metals (e.g., rare earth elements and yttrium, REY) has triggered extensive research on the enrichment of these metals in pelagic sediments. In the sediments collected worldwide, Ca-phosphate and Fe-Mn (oxyhydr)oxides are targeted as the two most important REY carriers based on multiple geochemical and mineralogical analyses. However, the formation of the REY-rich stratum remains enigmatic as the influences of diagenesis and the local restrictions of different oceanic basins are complex, which require further investigation. In our study, we analyzed four sediment cores from the Western, Central North, and Eastern South Pacific (WP, CNP, and ESP), which are three of the most promising REY-rich regions in global oceans. Sequential leaching quantifies the dominance of Ca-phosphate by controlling ∼73.9%–93.3% of ΣREY and the secondary role of Fe-Mn (oxyhydr)oxides by holding up to ∼97.8% of Ce and ∼4.82%–13.9% of ΣREY. The shallowly and deeply buried sediments show similar features regarding the REY proportions hosted by different phases, which indicates that the REY accumulation by Ca-phosphate might majorly occur on the seawater-sediment interface. The geochemistry of the studied sediment cores reveals that (a) REY enrichment in ESP is affected by hydrothermal Fe-Mn (oxyhydr)oxides which can promote adsorptions of P and REY. (b) The Fe and Mn contents in WP sediments show an inverse relationship against REY enrichment which might be explained by the dust input from Central Asia. (c) The slow sedimentation rate of CNP enables the extraordinary REY-uptake by Ca-phosphate, but the low flux of phosphorus constrains the formation of high-grade REY deposits. Key Points The rare earth elements and yttrium (REY) held by Ca-phosphate and Fe-Mn (oxyhydr)oxides in pelagic sediments are quantified by sequential extraction Ca-phosphate mainly scavenges REY at the seawater-sediment interface on the seafloor Local constraints on REY-rich sediments from different pelagic basins relate to their material sources (e.g., eolian dust and hydrothermal vent) Plain Language Summary Rare earth elements and yttrium (REY) are useful for geological studies and valuable materials for cutting-edge technologies. Recently, scientists found high REY contents in deep-sea sediments, which could be future resources. However, its enriching mechanism is not fully understood. Here, we analyze the geochemistry of four sediment cores across the Pacific. The samples were sequentially leached with chemical solutions to separate different mineral phases. The results reveal that Ca-phosphate (e.g., fish fossils) is the main carrier holding ∼73.9%–93.3% of REY, and Fe-Mn (oxyhydr)oxides (e.g., small Fe-Mn nodules) hold ∼4.82%–13.9%. The proportions of REY hosted by the carriers are similar among the layers ranging from the surface to 8-m depth. This indicates that the REY accumulation mostly happens on the seafloor surface. Additionally, this study reveals that the REY-rich sediments in the Eastern South Pacific are likely related to underwater hot vents that release more Fe and Mn to accumulate P and REY. In the Western Pacific, the levels of REY seem to be affected by dust coming from Central Asia. In the Central North Pacific with slow sedimentation rates, fish fossils can take up high REY, but their low amount limits the formation of high-quality REY deposits.
CAS / MDL:
研究领域:
海洋地质学
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地球化学
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2020
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IF 5.278
Anming Wang,Xinxin Chen,Jianyun Yu,Ningning Li,Huimin Li,Youcheng Yin,Tian Xie,Stephen Gang Wu
To prepare enzyme@Ca 3 (PO 4 ) 2 for environmentally friendly biocatalysis, Ca 2+ and (PO 4 ) 3− were extracted from bone waste by acidification. In the nearly neutralized filtrate, the Ca 2+ and (PO 4 ) 3− formed a Ca 3 (PO 4 ) 2 sediment that crystallized on a template of Thermomyces lanuginosus lipase (TLL) at 4 ℃ for 24 h, producing enzyme@Ca 3 (PO 4 ) 2 -Bone hybrid nanoflowers (hNFs). Clindamycin palmitate was efficiently synthesized by transfer of a palmityl moiety from vinyl palmitate to clindamycin free base using these hNFs as a biocatalyst. At 30 ℃ in petroleum ether (PE) as the solvent, the yield of the TLL hNF-catalyzed reaction was as high as 70.0%. Even at a high temperature (80 ℃), the yield in the hNF-catalyzed reaction was still 52.6%, but no product was detected when using free lipase as the catalyst. Moreover, the hNFs retained 90% of their initial activity after 10 cycles (120 h, 12 h per cycle). This green and sustainable method that utilizes bone waste from food production as the raw source of the inorganic component was facile and efficient, and the system may also be applicable for preparing other enzyme@Ca 3 (PO 4 ) 2 hNFs for industrial applications.
研究领域:
生物化学
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环境科学
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制药工程
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DOI
高影响因子
MATERIALS LETTERS
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2019
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IF 3.019
Shangpeng Liu,Jianwei Ma,Shuang Wang,Shaojuan Chen,Bin Wang,Jiwei Li
In this work, silver nanoparticles (Ag NPs) were incorporated into the flower-like hierarchical chitosan/calcium pyrophosphate hybrid microflowers (CS-CaP) via an in situ reduce process by polydopamine (PDA). Scanning electron microscope (SEM) observation, Energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analysis confirmed the formation of Ag NPs on the petals of CS/CaP (Ag@CS/CaP). Since the hierarchical structure of Ag@CS/CaP facilitates the contact of Ag NPs with bacteria, results of the antibacterial test and cell culture showed that the Ag@CS-CaP has efficient antibacterial properties to both E. coli and S. aureus bacteria without causing cytotoxicity. These results demonstrate the Ag@CS-CaP has the potential capacity for biomedical applications.
研究领域:
生物材料学
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医学
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纳米技术
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Yuhang Wang,Jingyi Wang,Zichun Ding,Xitong Cheng,Runze Liu,Jianing Guo,Haoran Liu,Lishuai Zong,Xigao Jian,Jinyan Wang
With the rapid development of science and technology, high-temperature-resistant resin systems are facing more severe challenges in extreme applications. To further improve the comprehensive thermal properties of phthalonitrile resins, an in situ generation of a high-temperature-resistant phthalonitrile resin achieving an organic–inorganic hybridization network is reported. A 3-aminophenol phthalonitrile containing –NH2 is used as a material to hybridize with prepared calcium phosphate nano-oligomers (CPOs), and the hybrid precursor is named as CAPN. Notably, the hydrogen bonding plays a crucial role in the hybrid, as nanosize control of CPOs, and in the synthesis of CAPN. The presence of hydrogen bonding interaction is proved by Fourier transform infrared, Raman, 31P solid-state nuclear magnetic resonance spectra, isothermal differential scanning calorimetric testing, and calculation of apparent activation energy (Ea). Based on organic–inorganic hybrid cross-linked networks formed by resins during the curing process, 50CAPN (the hybrid containing 50 wt % CPOs) has superior thermo-mechanical properties [glass transition temperature (Tg) > 580 °C] and thermal stability [5% pyrolysis temperature (Td5%(N2) = 574 °C, Td5%(air) = 543 °C)] than the blending system 50HAPN [the mixture with 50 wt % nanohydroxyapatite (HAP)]. Additionally, under extreme high temperature and combustion conditions, it demonstrates that 50CAPN has more stable thermo-oxidative aging resistance and flame retardancy than 50HAPN. We believe that this organic–inorganic hybrid system of phthalonitrile formed based on hydrogen bonding will elevate the introduction of the inorganic phase into the organic phase for the preparation of high-temperature-resistant resin systems to a certain level.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
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2024
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IF 6.2
Hao Zhang,Yufei Tang,Xuan Zhou,Qian Liang,Yani Sun,Bo Zhang,Kang Zhao,Zixiang Wu
The development of biodegradable bone scaffolds that align with the growth cycle of new bone has become a prominent focus in the field of bone defect repair. The sintered porous hydroxyapatite scaffolds exhibit a high degree of crystallization and demonstrate a slow degradation rate following implantation. The apatite phase with low crystallinity can be obtained following the hydration reaction of the non-sintered calcium phosphate bone cement (CPC) scaffolds. However, this leads to the formation of a weak alkaline environment during degradation, ultimately resulting in unsustainable degradation. The present study focuses on the fabrication of porous pectin/CPC composite scaffolds through two approaches during the preparation process of non-sintered porous CPC scaffolds: uniform composite and surface modification. The degradation performance of porous composite scaffolds exhibited an increase with the rise in pectin content. At a pectin content of 70 mg/mL, the scaffolds demonstrated a degradation rate of 13.79% within a span of 30 days. The mechanical properties of the porous scaffolds were enhanced with an increase in pectin concentration through surface coating. When the pectin concentration was 5 wt%, the scaffold exhibited a compressive strength of 8.72 MPa, an elastic modulus of 0.82 GPa, and experienced a degradation rate of 12.57% after a period of 30 days. The local acidic environment not only facilitates the dissolution of bone-like apatite but also enhances cell proliferation and adhesion. Pectin/apatite porous scaffolds exhibit excellent biocompatibility, offering a novel approach for the development of biodegradable bone replacement scaffolds.
研究领域:
生物材料学
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骨组织工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）