Desalination and Water Treatment
·
2024
·
IF 1
Wenjuan Shen,Menghan Xiao,Zixin Yao,Zhan Liu,Qi Feng,Xu Zhang,Wenqing Wang,Jianfen Li,Xing Peng,Fengjiao Quan,Menghua Cao,Shunxi Zhang,Zhenhua Qin
In this study, the effect of Mn(II) on the roxarsone (ROX) removal efficiency by iron oxide was systematically investigated. ROX removed by iron oxide obeyed pseudo-second-order non-linear kinetic model with the addition of Mn(II), and the removal rate constant normalized by specific surface area was calculated to be 4.5 × 10 −3 g m −2 h −1 , which was 4.8 times than that in the absence of Mn(II). Based on a series of experimental and characterization results, we found that Mn(II) could not be oxidized to Mn(III) in the presence of iron oxide, and the enhanced ROX removal process was attributed to the promoted ROX adsorption process. Further zeta potential results suggested that the addition of Mn(II) increased the isoelectric point of iron oxide from 5.3 to 7.5, which provided positive adsorption site favoring adsorption process of the negative charged arsenic functional group in ROX. This investigation provided fundamental understanding for the effect of Mn(II) on the removal efficiency of ROX by iron oxide.
研究领域:
环境科学
·
水处理
·
吸附技术
·
重金属去除
·
表面化学
✓ 已验证
DOI
高影响因子
Nature Protocols
·
2025
·
IF 16
Ming Jiang,Xie Zheng,Wu Jiaxin,Zhang Fan
The versatility of lanthanide-doped near-infrared (NIR, 700–1,700 nm) luminescent nanoparticles makes them valuable tools in various scientific and technological fields, from bioimaging to information security. However, the luminescence intensity of typical lanthanide-doped nanoparticles is significantly influenced by the efficiency of the sensitizer. The introduction of transition metal ions (such as Cr 3+ , Mn 2+ and Ni 2+ ) can greatly enrich the library of lanthanide NIR luminescence nanoparticles. We have reported a new crystalline nanoparticle, Na 3 CrF 6 , for high-brightness NIR emission from lanthanide activators (such as Er 3+ , Tm 3+ , Yb 3+ or Nd 3+ ). As an emerging luminescent material, a straightforward and scalable synthesis approach for these nanostructures holds promise for their broader application. Here we have refined and standardized the steps for transition metal-sensitized lanthanide luminescent nanoparticles, thereby establishing a library of advanced luminescent materials for researchers engaged in luminescent materials. The Protocol enables the precise preparation of chromium-, manganese- and nickel-trifluoroacetate, the synthesis of three types of transition metal-sensitized lanthanide nanoparticle and the fabrication of chromium-sensitized lanthanide homogeneous and heterogeneous nanostructure. Moreover, we provide verification protocols for each step’s output and guidelines for adjusting synthesis conditions. To aid in the reproducible synthesis of these nanoparticles, we also include a troubleshooting guide of the various stages. The estimated duration for synthesizing transition metal trifluoroacetate, transition metal-sensitized lanthanide nanoparticles and core–shell transition metal-sensitized lanthanide nanoparticles are ~70, 30 and 30 h, respectively. These procedures can be carried out by users with expertise in chemistry or materials science.
研究领域:
材料科学
·
纳米技术
·
无机化学
·
光学材料
·
发光
·
配位化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Anan Guo,Lvqing Tang,Bing Yang,Niling Xie,Yandong Cui,Wen Sun,Yuan Li,Xiangting Li,Yang Wu,Yingshuai Liu
Adjuvants including aluminum adjuvant (Alum) and oil-water emulsion have been widely used in inactivated pseudorabies virus (PRV) vaccines to improve their performance, however, they are not sufficient to protect from PRV infection because of the weak immune response and poor Th1-type immune response. Divalent manganese ion (Mn 2+ ) has been reported to increase the cellular immune response significantly. In this work, a xanthan gum and carbomer-dispersed Mn 2+ -loaded tannic acid-polyethylene glycol (TPMnXC) nanoparticle colloid is developed and used as an adjuvant to improve the performance of the inactivated PRV vaccine. The good in vitro and in vivo biocompatibility of the developed TPMnXC colloid has been confirmed by the cell viability assay, erythrocyte hemolysis, blood routine analysis, and histological analysis of mouse organs and injection site. The TPMnXC-adjuvanted inactivated PRV vaccine (TPMnXC@PRV) significantly promotes higher and more balanced immune responses indicating with an increased specific total IgG antibody and IgG2a/IgG1 ratio, efficient splenocytes proliferation, and elevated Th1- and Th2-type cytokine secretion than those of control groups. Wild PRV challenge experiment is performed using mice as a model animal, achieving a protection rate of up to 86.67 %, which is much higher than those observed from the commercial Alum. This work not only demonstrates the high potentiality of TPMnXC in practical applications but also provides a new way to develop the Mn 2+ -loaded nanoadjuvant for veterinary vaccines.
研究领域:
兽医学
·
免疫学
·
纳米技术
·
病毒学
✓ 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）