Heliyon
·
2025
·
IF 3.6
Xinyue Li,Yue Wang,Cheng Chen,Chao Tian,Xiaoli Yu,Jinglei Liu,Qin Li,Shuling Wang
The pollution of carbamate pesticides (CMs) has seriously threatened human health. Here, a sustainable biochar derived from lotus seedpod (LSP) was prepared to remove residual CMs. Among various raw materials, lotus seedpod-derived biochar (LSPB) showed better surface morphology, high porosity and more surface functional groups to mediate the best adsorption performance of CMs. When the LSP/H 3 PO 4 ratio, carbonization temperature and time was defined as 1:5, 700°C and 60 min, respectively, LSPB obtained the highest adsorption capacity and good yield. The SEM micrographs, XRD and FTIR showed that LSPB was of porous and amorphous carbon structure, and increased functional groups for more surface adsorption sites. The adsorption efficiency of LSPB was considerably higher for adsorbent dosage of 0.5 g/L, solution temperature of 20°C, initial CMs concentration of 10 μg/mL, and adsorption time of 30 minutes. The Elovich adsorption kinetic model indicated the potential heterogeneous surface adsorption mechanism of LSPB. Adsorption thermodynamic showed that the CMs adsorption on LSPB was spontaneous and endothermic. LSPB displayed favorable recovery performance, and can be effectively used for five cycles. LSPB showed potential adsorption performance in different CMs-residual waters, and is even superior to that of some commercial adsorption products. Based on its favorable adsorption performance and low-cost, this sustainable LSPB may be a promising CMs residues adsorbent for removal of it from water.
研究领域:
环境科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2024
·
IF 3.7
Yang Wang,Qi Ren,Hongtao Xia,Jianqi Lv,Zihao Feng,Cong Yin,Yanjun Du,Yang Li,Yun Wang
Pollution from uranium(VI)-containing wastewater is a non-negligible part during the use of nuclear energy and becomes the urgent problem to be solved. This work coupled hydrothermal and pyrolytic process to prepare magnesium oxide loaded lotus seedpods-derived biochar (MgO-HBC) for U(VI) adsorption in aqueous solution. The coupling process significantly enhanced the surface area, thermal stability and active sites of biochar. Batch adsorption experiments showed that MgO-HBC had the characteristics of fast adsorption rate (within 30 min), high U(VI) adsorption capacity (906.5 mg∙g −1 ) and susceptibility to solution pH and temperature. The fittings of the pseudo-second-order and Langmuir model revealed a chemical adsorption process with homogeneous monolayer. Thermodynamics analysis demonstrated the spontaneity, endothermicity and randomness of adsorption process . Adsorption mechanism proved that U(VI) adsorption by MgO-HBC was through the complexation between uranyl and its hydrolysates of Mg-O. The work provided a new synthesis strategy of MgO-HBC for U(VI) pollution cleanup.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Shuwei Yuan,Jiahui Wang,Xiang Li,Xun Zhu,Zhenqing Zhang,Duxin Li
The lotus ( Nelumbo nucifera Gaertn.) is the largest aquatic vegetable in Asia. The lotus seedpod (LS) is an inedible part of the mature flower receptacle of the lotus plant. However, the polysaccharide isolated from the receptacle has been less studied. The purification of LS resulted in two polysaccharides (LSP-1 and LSP-2). Both polysaccharides were found to be medium-sized HG pectin, with a Mw of 74 kDa. Their structures were elucidated via GC–MS and NMR spectrum and proposed as the repeating sugar units of GalA connected via α-1,4-glycosidic linkage, with LSP-1 having a higher degree of esterification . They have certain content of antioxidant and immunomodulatory activities. The esterification of HG pectin would have an adverse effect on these activities. Furthermore, the degradation pattern and kinetics of LSPs by pectinase conformed to the Michaelis-Menten model. There is a large amount of LS, resulting from the by-product of locus seed production, and thus a promising source for the isolation of the polysaccharide. The findings of the structure, bioactivities, and degradation property provide the chemical basis for their applications in the food and pharmaceutical industries .
研究领域:
食品科学
·
药理学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2012
·
IF 3.655
Qian Wu,Hengye Chen,Zhejuan Lv,Shuyi Li,Bei Hu,Yafei Guan,Bijun Xie,Zhida Sun
It has been reported that oligomeric procyanidins of lotus seedpod (LSOPC) is effective in the alleviation of Alzheimer’s disease and diabetes through its antioxidant and insulin-potentiating activities. This study investigated the anti-glycative activity of LSOPC in a bovine serum albumin (BSA)-glucose model. The level of glycation and conformational alterations were assessed by specific fluorescence, Congo red binding assay and circular dichroism. The results show that LSOPC has a significant anti-glycative activity in vitro and it can also effectively protect the secondary structure of BSA during glycation. LSOPC or catechin (a major constituent unit of LSOPC), were used to react with methylglyoxal. The structures of their carbonyl adducts were tentatively identified using HPLC-MS 2 . Their capacity to scavenge methylglyoxal suggested carbonyl scavenging as a major mechanism of antiglycation. Therefore, LSOPC could be helpful to prevent AGEs-associated diseases, and with the potential to be used as functional food ingredients.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Liangmei Rao,Yifu Zhu,Zhongshu Duan,Ting Xue,Xuemin Duan,Yangping Wen,Annamalai Senthil Kumar,Weiming Zhang,Jingkun Xu,Akbar Hojjati-Najafabadi
Biomass waste, a good candidate for advanced carbon materials for sustainable electrodes, is receiving more and more attention for high value-added materials because of its promising contribution to economic growth and sustainable development. We proposed a green co-hydrothermal approach to prepare lotus seedpods biochar (BC) decorated molybdenum disulfide (MoS 2 ) from waste lotus seedpods and precursors of MoS 2, and a portable, flexible, outdoor and inexpensive sensing platform for hyperin on the integrated flexible three-electrode using U-disk potentiostat with smartphone was successfully developed. Structure and properties of MoS 2 -BC were characterized, it was proved that BC improves microstructure and morphology, electronic conductivity, electrode stability and electrocatalytic properties of MoS 2 . Attributing to these impressive features, the detection signal of hyperin was significantly amplified by the MoS 2 -BC modified glass carbon electrode (GCE) in detection range of 0.01–21 μΜ with detection limit (LOD) of 5 nM. It was worth mentioning that the MoS 2 -BC modified screen-printed electrode (SPE) performs hyperin detection in range of 100 nM - 3 μM with LOD 50 nM (S/N = 3). The practicability of the proposed method confirmed that the portable, on-site, low-cost, and outdoor detection of hyperin was feasible and practical in comparison with traditional both electrochemical sensing and HPLC methods.
研究领域:
材料科学
·
环境科学
·
电化学
·
可持续发展
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Foods
·
2021
·Vol. 10
·期 2
·239
·
IF 4.35
Nina Bao,Di Wang,Xizhe Fu,Hujun Xie,Guizhen Gao,Zisheng Luo
LotusReceptaculum Nelumbinishas been sparking wide research interests due to its rich phenolic compounds. In the present work, ultrasonic-assisted extraction coupled with glycerol was employed to extract phenolic compounds fromReceptaculum Nelumbinisand the process was optimized using a response surface methodology with Box-Behnken design (BBD). The optimal conditions for the total phenolic content (TPC) extract were obtained: glycerol concentration of 40%, an extraction temperature of 66 °C, ultrasonic time of 44 min, and the solvent-to-solid ratio of 55 mL/g. Under these optimum extraction conditions, the extraction yield of TPC was 92.84 ± 2.13 mg gallic acid equivalents (GAE) /g. Besides, the antioxidant activities demonstrated the ability of free radical scavenging by four different methods that included 2,2-Diphenyl-1-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP), 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and reducing activity (RA) were 459.73 ± 7.07, 529.97 ± 7.30, 907.61 ± 20.28, and 983.66 ± 11.80 μmol TE/g, respectively. Six phenolic compounds were identified by ultra-high pressure liquid chromatography combined with triple-time-of-flight mass spectrophotometry (UPLC-Triple-TOF/MS) from the extracts. Meanwhile, Fourier transform infrared (FTIR) was conducted to identify the characteristic functional groups of the extracts and thus reflected the presence of polyphenols and flavonoids. Scanning electron microscopy (SEM) illustrated the microstructure difference of four treatments, which might explain the relationships between antioxidant activities and the structures of phenolic compounds.
研究领域:
植物化学
·
分析化学
·
食品科学
·
天然产物研究
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）