Water
·
2019
·Vol. 11
·期 11
·2302
·
IF 2.524
Dingyun Yan,Zhe Sun,Jiajie Wang,Lili Wang,Ruijun Pan,Qiang Wu,Xiaowei Liu
Mn(III) oxidation technology has attracted increasing interest in recent years because of its fast decontamination kinetics and second-pollution-free characteristic. Whether it can be used as a pre-oxidation step to enhance conventional coagulation process remains to be evaluated. Herein, an Fe-coagulation/sedimentation process combined with Mn(III) pre-oxidation (Mn(III)+C/S), hypochlorite pre-oxidation (Cl2+C/S), and permanganate pre-oxidation (PM+C/S) was applied to treat simulated micro-polluted raw water. The removal performance of routine water quality indices (turbidity, dissolved organic carbon, total nitrogen, nitrate-nitrogen, ammonia-nitrogen, Pb(II), and Cr(VI)) and the emerging pollutants (acesulfame, carbamazepine, bisphenol S, and nano-ZnO) created by these three processes were researched. The mechanism of how Mn(III) pre-oxidation influences C/S was explored by identifying the transformation products of Mn(III), measuring the timely variation of flocs’ zeta potential and size, and scanning flocs’ micromorphology. Compared to Cl2+C/S and PM+C/S, Mn(III)+C/S exhibited its superiority in removing dissolved organic carbon (72.9%), total nitrogen (31.74%), and emerging pollutants (21.78%–93.49%). The enhanced removal of these contaminants by Mn(III)+C/S found its explanation in the strong oxidation power of Mn(III) and the multiple roles of in-situ formed MnO2(e.g., flocculation core, adsorption co-precipitant, and densification agent). The acute toxicity tests confirmed that water treated by Mn(III)+C/S did not show a significant change in the associated toxicity. The findings of the present study indicate that Mn(III) oxidation technology shows great potential as an alternative to pre-oxidation technology of waterworks.Keywords:pre-oxidation;enhanced coagulation;Mn(III);emerging pollutants;micro-polluted raw water
研究领域:
环境科学
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水处理工程
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DOI
高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2016
·Vol. 182
·期 1
·55-66
·
IF 1.606
Fu Ruijie,Yao Kai,Zhang Qisheng,Jia Dongying,Zhao Jiayuan,Chi Yuanlong
A series of collagen hydrolysates (CHs) were prepared from pigskin shavings by using pepsin (PCH), trypsin (TCH), Alcalase (ACH), HCl (HCH), and NaOH (NCH). Their physicochemical properties, including degree of collagen hydrolysis, molecular weight distribution, electric charge, and microstructure, were investigated, and their flocculation performance was evaluated in a kaolin suspension, at varied pHs and concentrations. PCH exhibited high flocculation capability under acidic and neutral conditions, and its efficiency for removing suspended particles was approximately 80% at a concentration of 0.05 g/L. TCH, ACH, HCH, and NCH showed almost no flocculation capability. The flocculation capability of PCH could be mainly due to a combination of optimal molecular weight distribution and electric charge. This study could provide an environment-friendly natural flocculant and also proposes a promising approach for the reuse of collagen wastes.
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研究领域:
生物化学
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环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS BIOCHEMISTRY
·
2017
·
IF 2.497
Xia Li,Wei-Cai Zeng,De-Yi Zhu,Jiang-Ling Feng,Cui-Cui Tian,Xue-Pin Liao,Bi Shi
This study explored the possible application of collagen hydrolysate (CH) in the fermentation process using Bacillus pumilus as probe bacterial strain. When CH acted as an only source of carbon and nitrogen in the culture medium, B. pumilus was observed to show normal characterizations during its growing process. Meanwhile, the utilization degree of CH by B. pumilus could be enhanced when wheat bran was added (used as carbon source) in the fermentation process. It was found that the highest alkaline protease activity was 325 U/mL when only CH was used, while it was increased to 620 U/mL with the addition of wheat bran. Besides, with different combination of soybean meal and CH, it was found that the ability using CH to produce alkaline protease is comparable to that of soybean meal in the presence of wheat bran. Moreover, the growth behaviors of the strain were not affected by inoculation concentrations, but the time of producing alkaline protease was greatly saved as reducing loading volume. Present investigation suggested that CH can be used as carbon and nitrogen sources in the fermentation process.
研究领域:
微生物学
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生物技术
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DOI
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2018
·Vol. 21
·期 3
·313-322
·
IF 1.454
Baochuan Wang,Jun Liu,Xiaona Han,Fengdi Li,Zhengjun Li,Qinhuan Yang
2 bola-type collagen hydrolysate-based siloxane surfactants (CBES) were prepared via grafting of an epoxy-terminated polydimethylsiloxane oligomer onto 2 collagen hydrolysates with different molecular weights. Their structure was characterized by Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance ( 1 H NMR) spectroscopy, and the degree of grafting was determined by calculating the free amino content, which confirmed the successful synthesis of CBES. Subsequently, their physicochemical properties, such as particle size and isoelectric point, were evaluated. Besides, surface activities, application functionalities, and biodegradability of CBES were investigated. The results showed that CBES-1, prepared with the lower-molecular-weight collagen hydrolysate, possessed superior surface activity, excellent foaming ability, and good emulsifying capacity comparable to those of a typical emulsifier such as the fatty alcohol polyoxyethylene ether (AEO-9). In addition, their BOD 5 /COD Cr value and CO 2 evolution demonstrated that the CBES are readily biodegradable. There is, therefore, great potential for the bola-type CBES to be applied in fields such as leather treatment and textile industries.
研究领域:
材料科学
·
生物学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2018
·
IF 3.909
Xuechuan Wang,Ke Chen,Wei Li,Dongyan Hao,Peiying Guo
In this research, collagen hydrolysates with different average molecular weights ( Mn ¯ ) from leather collagen were chosen as raw materials. Five environmental-friendly sizing agents (SA) were prepared by cross-linking collagen hydrolysates with glycol diglycidyl ether (GDE) and further grafting them with butyl acrylate (BA) and styrene (St). Then the compound sizing agents (SGDESA-x, x = 1, 2, 3 and 4) were obtained by simple physical mixing of GDESA and starch. The surface sizing performance of GDESA and compound sizing agents were studied. The research result shows that both physical, mechanical properties and water resistance of the corrugated paper coated by GDESA were significantly improved when Mn ¯ of collagen hydrolysate was about 10,000, and its emulsion exhibited robust stability in long standing time. Furthermore, when the SGDESA-2 was used as a sizing agent, the coated corrugated paper exhibited strong water resistance, good physical and mechanical properties even after refolded for 20 times.
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yizhuang Wang,Bingbing Liu,Hu Sun,Yanfang Huang,Guihong Han
Bauxite residue (red mud) is a typical solid waste discharged from the aluminum metallurgy industry and can be considered as an alternative resource for the recovery of iron (Fe), aluminum (Al), and titanium (Ti). Acid leaching is an effective technique for the simultaneous extraction of valuable metals from red mud, whereas the leachate with various metals confronts the difficulty of metals separation. In this work, a selective separation and recovery of Fe, Al and Ti from red mud leachate by the preferential Fe-Ti iso precipitate flotation followed by a reduction-hydrolyzation process was proposed. In the iso precipitate flotation process, the cupferron was acted as an Fe-Ti synchronous chelation agent and hexadecyl trimethyl ammonium bromide (CTAB) was used as an anionic collector for the flotation separation of Fe-Ti chelate. The generated fine hydrophobic chelates are rapidly separated from solution by flotation with the assistance of CTAB, in which 99.3% Fe and 99.8% Ti were transferred into the flotation product, while 96.7% Al remained in the leachate, realizing the first separation of Al. Reduction-hydrolyzation was further conducted to separate Ti and Fe from the dissolving solution of the flotation product. Hydrolysis thermodynamic analysis indicated that the required hydrolysis pH range of Fe 2+ was much different from that of TiO 2+ and Ti 3+ . After selective reduction of Fe 3+ to Fe 2+ by KI, 99.8% Ti was concentrated in the residue while 94.8% Fe remained in the solution. Eventually, the comprehensive recoveries of Fe, Ti, and Al are 94.1%, 99.7%, and 96.7%, respectively.
研究领域:
冶金学
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化学工程
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环境科学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Mao Yang,Lang Rui,Yuhan Lu,Wenjia Han,Xugang Dang
Functional papermaking additives have tremendous potential for application in multipurpose paper. In this research, a functional paper internal sizing agent based on waterborne polyurethane-grafted collagen hydrolysate (WPUC) was first prepared via free-radical emulsion polymerization of vinyl monomer-modified collagen hydrolysate and waterborne polyurethane (WPU). Then, the prepared WPUC was used as an internal sizing agent for sustainable processing and manufacturing of the handsheets. FTIR, XRD, DSC, and other analytical techniques were used to characterize the behavior and effects of WPUC internal sizing on the handsheets. The research found that the tensile coefficient, the tear coefficient, the folding resistance, and Cobb60 of the handsheets reached 55.8 N.m.g–1, 1.9 mN.m2.g–1, 12 times, and 190 g/m2, respectively, when the WPUC sizing agent was 2% in the pulp. In addition, when the precipitated calcium carbonate (PCC) and WPUC were incorporated in the pulp, the retention rate of PCC could be greatly increased without affecting the mechanical properties of the finished paper. Specifically, when the PCC dosages were 25 and 50% in the papermaking, the PCC retention rate of handsheets with the WPUC sizing agent increased correspondingly by 139.2 and 174.5%, respectively. Moreover, the handsheets had good water resistance. The results indicate that the WPUC is expected to be used as a novel paper internal sizing agent to further improve the paper performance as well as lower the production costs.
研究领域:
材料科学
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环境科学
·
造纸工程
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DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 7
·4024-4029
·
IF 3.108
Jianfei Zhou,Teng Xu,Xiaoling Wang,Chang Liu,Xuepin Liao,Xin Huang,Bi Shi
A low-cost and water resistant biomass adhesive, collagen hydrolysate–silane coupling agent hybrids (CSH), was prepared by using collagen hydrolysate (CH) extracted from leather waste as the starting material, and silane coupling agent (SCA) as the crosslinking agent. The as-prepared adhesive was fully characterized by Fourier transform infrared spectroscopy (FTIR), 29Si CP-MAS NMR spectroscopy, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), ANS assay and ninhydrin assay. The as-prepared CSH exhibited pretty good adhesive strength and water resistance. Moreover, the water resistance of CSH can be conveniently tuned by changing the type and dosage of the silane coupling agent. When used as a wood adhesive, the dry adhesive strength of CSH was as high as 1.57 MPa, and the corresponding wet adhesive strength reached 0.95 MPa. Our experimental results suggest that the collagen hydrolysate extracted from leather waste has a great potential to be used as a low-cost and highly effective adhesive in the wood composite industry.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
Food Bioscience
·
2024
·
IF 4.8
Na Li,Zhangwen Liu,Wenhua Li,Linyan Yao,Jianxi Xiao
Osteoporosis is a prevalent systemic disease characterized by the change of bone structure and function, significantly affecting the human health. Oral collagen hydrolysates have garnered increasing attention for the prevention and treatment of osteoporosis due to their advantages of low molecular weight, easy absorption, and high biological activity; however, they suffer from severe concerns including uncontrollable molecular weights, limited biocompatibility, and unclear correlations between molecular weight and efficacy. Herein, we have for the first time developed a series of yak bone collagen hydrolysates (YBCH) with controllable molecular weight for effective prevention of osteoporosis. The YBCH exhibited low (LYBCH, M < 1000 Da), medium (MYBCH, 1000 < M < 3000 Da), high (HYBCH, 3000 < M < 10000 Da), and ultra-high (UYBCH, M > 10000 Da) molecular weight, respectively. An osteoporosis mouse model was established to evaluate the therapeutic effects of YBCH. Histological analysis indicated that YBCH could ameliorate pathological changes of osteoporosis by increasing bone mass and promoting collagen regeneration, with MYBCH showing the most pronounced effect. Micro-CT results revealed that MYBCH significantly enhanced the microstructure of osteoporotic bone by increasing BMD, BV/TV, Tb.N, and Tb.Th, while decreasing Tb.Sp and Po. These bioactive YBCH provide a novel strategy for the treatment of osteoporosis, presenting promising applications in nutritional supplements and functional food.
研究领域:
医学
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营养学
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DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2025
·
IF 12.4
Renyuan Wang,Qiaoyan Wang,Jie An,Ying Wang,Qiang Xia,Daodong Pan,Lihui Du,Jun He,Yangying Sun,Jinxuan Cao,Renyou Gan,Changyu Zhou
Emulsion-filled hydrogels have recently attracted interest against foodborne pathogens. However, the relationship between fibrinogen hydrolysate-carrageenan (AHs-C) and carboxymethyl chitosan-cinnamaldehyde (CMCS-CAL), as well as the antibacterial effect, were not investigated during the formation of emulsion-filled hydrogels. To explore the interaction mechanism between AHs-C and CMCS-CAL as well as the antimicrobial effect of the emulsion-filled hydrogels, the emulsion-filled hydrogels were fabricated using different ratios of AHs-C and CMCS-CAL. The morphological characteristics, structural changes, antimicrobial capacity, and release behavior of cinnamaldehyde were evaluated. The rheological results showed that the hydrogel of AHs-C/CMCS-CAL-5:1 exhibited the highest crossover strain value (23.7%) and formed more stable network structure compared with other groups (AHs-C, AHs-C/CMCS-CAL-10:1, 20:1, 40:1). FTIR and XPS showed that CMCS-CAL was bonded to AHs-C via Schiff bases, hydrogen bonds and electrostatic interactions, where AHs-C/CMCS-CAL-5:1 showed more interaction between AHs-C and CMCS-CAL, and higher thermal stability compared with other groups. The inhibition of AHs-C/CMCS-CAL-5:1 against Staphylococcus aureus and Salmonella enteritidis reached 99.9%, and the release kinetics of cinnamaldehyde demonstrated that the release of cinnamaldehyde in AHs-C/CMCS-CAL transitioned from dissolution diffusion to Fick diffusion in gastrointestinal simulation experiments, which was mainly responsible for the sustaining inhibition of foodborne pathogens.
研究领域:
食品科学
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生物化学
·
材料科学
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DOI
高影响因子
Pharmacognosy Magazine
·
2025
·
IF 0.9
Yezhou Li,Chengjian Tang
Background and PurposeAlginate and gelatin have biocompatibility and biodegradability for drug formulations or carriers, but the roles and mechanisms in cartilage injury (CI) repair remain unclear. This research investigated the application of alginate-collagen hydrogel (ACH) in rat CI repair and its related mechanisms through in vitro and in vivo experiments.Materials and MethodsAlginate and modified collagen solutions were mixed to prepare the ACH. The obtained samples were characterized, and their sustained release properties were determined. L929 mouse fibroblasts were assigned into a blank control group (BC group, untreated), a positive control group (PC group, treated with 6.4% phenol), a negative control group (NC group, treated with tissue culture polystyrene), and an ACH group (treated with ACH). The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay assessed cell viability. Meanwhile, the cytotoxicity of the ACH and its impact on cell proliferation and cell attachment capabilities were analyzed. Thirty 4-week-old specific pathogen-free Sprague-Dawley rats were randomly grouped into a chondrocyte group (chondrocytes collected and cultured), a cPAGE group (chondrocytes treated with ACH), a model group (CI model), and an mPAGE group (CI model treated with ACH). The influence of ACH on chondrocyte proliferation and type II collagen (COL-II) expression were assessed via cell counting kit 8 (CCK-8) assay and immunofluorescence staining. Furthermore, the impacts of ACH on chondrocyte tissue and COL-II expression were analyzed using Safranin O-Fast Green staining, the International Cartilage Repair Society (ICRS) score, and COL-II tissue staining. Immunoblotting was utilized to detect tumor necrosis factor alpha (TNF-α), nuclear factor kappa-B (NF-κB), matrix metalloproteinase 13 (MMP-13), and COL-II proteins in cartilage tissue.ResultsThe release rate of the constructed ACH reached over 85% within 72 h and achieved degradation equilibrium within 5 days with a weight loss rate of over 60%. L929 fibroblast culture results showed that the ACH posed no significant cytotoxicity, and cell attachment results were not obviously different from those on tissue culture plates (p < .05). MTT assay results demonstrated that the ACH exerted no adverse effects on L929 cell proliferation and growth, indicating good biocompatibility. CCK-8 and COL-II results indicated that chondrocyte proliferation in the cPAGE group was markedly higher versus that in the chondrocyte group (p < .05). Besides, animal experiments unveiled that, relative to the CI group, the mPAGE group had more chondrocytes, upregulated COL-II, and higher ICRS scores (p < .05). MMP-13, NF-κB, and TNF-α were downregulated, and COL-II was upshifted in the mPAGE group, with remarkable differences (p < .05).ConclusionACH exhibited excellent biocompatibility and low cytotoxicity, promoted cell proliferation and growth, and facilitated chondrocyte proliferation in rat CI repair, offering a valuable research foundation for CI treatment.
研究领域:
生物材料学
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组织工程学
·
医学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Weixiang Li,Zhanfang Ma
In this work, a conductive catalytic redox hydrogel composed of aniline and vinyl-ferrocene was prepared which showed good conductivity and strong electrochemical redox signal at 0.04 V (vs. Ag/AgCl). The hydrogel was simply generated in situ on the glassy carbon electrode to fabricate an amperometric immunosensor. The redox hydrogel provided a three dimensional porous structure, which improved the specific surface area of modified electrode. Based on the catalytic activity of ferrocene toward the oxidation of ascorbic acid, the electrochemical signal can be amplified. Gold nanoparticles were modified on the redox hydrogel by electrochemical deposition to promote electron transfer, which also can immobilize antibody. Prostate-specific antigen (PSA), a significant indicator of prostate cancer, had been measured as a model tumor marker. Under the optimized conditions, a linear range of the prostate specific antigen concentrations from 0.001 to 200 ng mL −1 with a detection limit of 0.54 pg mL −1 ((S/N) = 3) was obtained. Importantly, the detection of PSA in the human blood serum samples showed satisfactory accuracy with the enzyme linked immunosorbent assay results, which showed the redox hydrogel possessed huge potential for the detection of other tumor markers.
研究领域:
生物医学工程
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分析化学
·
肿瘤标志物检测
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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）