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Interaction mechanisms of organic contaminants with burned straw ash charcoal

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Journal of Environmental Sciences 2010年第10期22卷 1586-1594页

作者： wenhai huang,Baoliang Chen Department of Environmental Science,Zhejiang University,Hangzhou 310028,China Department of Environmental Science Zhejiang University Hangzhou 310028 China

Black carbons （e.g., charcoal） have a great impact on the transport of organic contaminants in soil and water because of its strong affinity and ubiquity in the environment. To further elucidate their interaction mechanism, sorption of polar （p-nitrotoluene, m-dinitrobenzene and nitrobenzene） and nonpolar （naphthalene） aromatic contaminants to burned straw ash charcoal under different de-ashed treatments were investigated. The sorption isotherms fitted well with Freundlich equation, and the Freundlich N values were all around 0.31-0.38, being independent of the sorbate properties and sorbent types. After sequential removal of ashes by acid treatments （HCl and HCl-HF）, both adsorption and partition were enhanced due to the enrichment of charcoal component. The separated contribution of adsorption and partition to total sorption were quantified. The effective carbon content in ash charcoal functioned as adsorption sites, partition phases, and hybrid regions with adsorption and partition were conceptualized and calculated. The hybrid regions increased obviously after de-ashed treatment. The linear relationships of Freundlich N values with the charring-temperature of charcoal or biochar （the charred byproduct in biomass pyrolysis） were observed based on the current study and the cited publications which included 15 different temperatures （100-850℃）, 10 kinds of precursors of charcoal/biochar, and 10 organic sorbates.

关键词： ash charcoal organic pollutant adsorption partition effective carbon

Effect of background electrolytes on the adsorption of nitroaromatic compounds onto bentonite

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Journal of Environmental Sciences 2009年第8期21卷 1044-1052页

作者： CHEN Baoliang, huang wenhai Department of Environmental Science, Zhejiang University, Hangzhou 310028, Zhejiang, China. Department of Environmental Science Zhejiang University Hangzhou 310028 Zhejiang China

To further elucidate interaction of nitroaromatic compounds with mineral surface, the sorption of m-dinitrobenzene （m-DNB） and nitrobenzene to original bentonite in aqueous solution containing different electrolytes （i.e., KCl, NH4Cl, CaCl2 and Tetramethylammonium bromide （TMAB）） was studied. The sorption of m-DNB was greatly enhanced with the presence of KCl and NH4Cl, while little influence was observed with CaCl2 and TMAB, following the order of KCl 〉 NH4Cl 〉〉 TMAB, CaCl2, or DI water. For nitrobenzene, sorption enhancement only occurred at high nitrobenzene concentrations in the presence of KCl, and the solute equilibrium concentration at inflexion point was lowered with increasing KCl concentration. These sorption enhancements were significantly promoted with the increase of electrolyte concentration. The salting-out effect is insufficient to account for the sorption enhancement by original bentonite with increasing KCI or NH4Cl concentration. X-ray diffraction patterns of bentonite suspensions indicated that the sorption enhancement of m-DNB was attributed to the intercalation of K^＋ or NH4^＋ into bentonite interlayer and then dehydration with m-DNB to form inner-sphere complexes, which caused previously expanded bentonite interlayers to collapse in aqueous suspension, thus further enhanced the interaction of phenyl with siloxane surface. In comparison, the sorption enhancement of NB is attributed to the formation of outer-sphere complexes with K^＋ at high solute-loadings （〉 20（0-400 mg/kg）. The sorption of m-DNB to initially modified TMA^＋-bentonite and K^＋-bentonite was almost the same as respective sorption to original bentonite in solution containing TMA^＋ and K^＋.

关键词： sorption nitroaromatic compound bentonite cation type wastewater treatment

Preparation of AgCl Nano-Crystal Embedded Tellurite Nonlinear Optical Glasses under Electric Field Accompanied Heat Treatment

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Journal of Materials Science & Technology 2008年第6期24卷 863-866页

作者： Jian LIN wenhai huang Bofang LI Chong JIN Changcheng LIU Shuhua LEI Zhenrong SUN College of Materials Science and Engineering Tongji University Shanghai 200092 China Key Lab of Optical Magnetic Resonance Spectroscope East China Nomal University Shanghai 200062 China

The quantum effect of nano-crystals is an important factor to improve nonlinear optical performance of nanocrystal embedded glasses, while controlling the size distribution and content of nano-crystals in the glass accurately is a key to obtain good quality. The auxiliary direct current electric field, accompanied with heat treatment, was applied on AgCI containing niobic tellurite glass sheet. The nucleation and crystallization of the glass were well controlled under auxiliary electric field. It was found that the average size of AgCI nano-crystal particles in the glass is smaller than that under single heat treatment, and the content of nano- crystals is higher. Therefore the third-order nonlinear optical performance of the glass was increased a lot. The local-area distributed AgCl nano-crystal particles can also be embedded into a glass sheet by using locally applied electric field.

关键词： Tellurite glass Electric field Nonlinear optical performance

Preparation of bioactive glasses with controllable degradation behavior and their bioactive characterization

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Chinese Science Bulletin 2007年第2期52卷 272-276页

作者： YAO AiHua WANG DePing FU Qiang huang wenhai Mohamed N. RAHAMAN School of Materials Science and Technology Tongji University Shanghai 200092 China University of Missouri-Rolla MO 65409 USA

Bioactive glasses and ceramics have been widely investigated for bone repair because of their excel-lent bioactive characteristics. However, these biomaterials undergo incomplete conversion into a bone-like material, which severely limits their biomedical application. In this paper, borosilicate bioac-tive glasses were prepared by traditional melting process. The results showed that borosilicate glasses possessed high biocompatibility and bioactivity. In addition, when immersed in a 0.02 mol/L K2HPO4 solution, particles of a borate glass were fully converted to HA. The desirable conversion rate to HA may be achieved through the adjustment of the B2O3/SiO2 ratio. The results of XRD and FTIR analysis indicated that the degradation product was carbonate-substituted hydroxyapatite, which was similar to the inorganic component of bone.

关键词：生物活性陶瓷玻璃降解行为生物材料骨组织

Formation and Characterization of Bone-like Nanoscale Hydroxyapatite in Glass Bone Cement

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Journal of Materials Science & Technology 2004年第6期20卷 772-774页

作者： Qiang FU, Nai ZHOU, wenhai huang, Deping WANG and Liying ZHANGSchool of Materials Science and Engineering, Tongji University, Shanghai 200092, China Sch. of Mat. Sci. and Eng. Tongji Univ. Shanghai 200092 China

Glass based bone cement (GBC) was synthesized by mixing CaO-SiO2-P2O5 based glass powder with ammonium phosphate liquid medium. Bone-like hydroxyapatite (HAP, Ca10(PO4)6(OH)2) was found to form after GBC was immersed in simulated body fluid (SBF). HAP crystal grew with an increasing time along c axle and reached about 200 nm in length after 30 days, however, the end plane granularity remained 30-50 nm. The chemical composition, crystal structure and morphology of HAP formed from GBC were proved to have great resemblance with living HAP. It is believed that GBC was a desirabie biomedicai material with high bioactivity. Furthermore, the high compressive strength guaranteed the possibility of GBC in clinical application.

关键词： Bioactivity Bone cement Hydroxyapatite Microstructure

In vitro bioactivity and cytocompatibility of porous scaffolds of bioactive borosilicate glasses

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Chinese Science Bulletin 2009年第18期54卷 3181-3186页

作者： ZHANG Xin FU HaiLuo LIU Xin YAO AiHua WANG DePing huang wenhai ZHAO Ying JIANG XinQuan Institute of Bio-Engineering & IT Materials Center for Advanced Materials and Nano-Biomedicine Tongji University Shanghai200092 China Department of Materials Science and Engineering Missouri University of Science and Technology Rolla MO 65409 USA Key Laboratory of the Advanced Civil Engineering Materials Ministry of Education Tongji University Shanghai 200092 China Shanghai Ninth People's Hospital Shanghai 200011 China

The bioactive borosilicate scaffolds (R2O-RO-B2O3-SiO2-P2O5) with four different contents of borate were fabricated by replication technique. The bioactivity, degradability and the cytotoxicity of the scaffolds were studied in this paper. The porosity of the scaffolds was found to be 73%―80%, and the pore size was in the range of 200―300 μm. The porous scaffolds immersed in 0.02 mol·L-1 K2HPO4 solution were transformed into hydroxyapatite. And it is notable that the D-Alk-2B, D-Alk-3B-scaffolds were covered by hydroxyapatite layers after 7 h-immersion, which proved their high bioactivity. In the cell adhesion test, cells could be seen growing well on the scaffolds, showing stretched morphology and obvious pseudopodia, and only the high cumulative concentration of B ions released from the D-Alk-3B-scaffold samples had an inhibition effect on cell proliferation. But the inhibition effect could be alleviated by diluting the extract solution to a certain concentration (dilution ratio: 1:8). Therefore, after suitable pretreatment, the porous borosilicate bioactive glass scaffold can be a desirable candidate for bone tissue engineering.

关键词：生物活性玻璃硼硅酸盐玻璃细胞相容性多孔支架羟基磷灰石溶液浸泡稀释比例磷酸氢二钾

Preparation and Characterization of β-TCP/CS Scaffolds by Freeze-extraction and Freeze-gelation

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Journal of Wuhan University of Technology(Materials Science) 2011年第2期26卷 372-376页

作者：郝瑞然 School of Materials Science and Engineering Tongji University

The freeze-extraction and freeze-gelation methods were used to prepare highly porous β-TCP/CS scaffolds with different β-TCP/CS *** these methods,the suspending mixture of β-TCP and chitosan was frozen,the frozen mixture was immersed in a non-solvent（0.05mol/L NaOH/ehanol aqueous） bath to allow the exchange between solvent（acetic-acid aqueous） and non-solvent at a temperature lower than the freezing point of the ***,the β-TCP/CS scaffolds were formed and dried at room *** electron microscopy （SEM）,X-ray diffraction （XRD）,gas chromatography （GC） and omnipotence material testing machine were employed to characterize the β-TCP/CS *** results of GC show that the freeze extraction of the β-TCP/chitosan scaffolds was completed when the extraction time is above 24 *** SEM results show that the β-TCP/CS scaffolds are composed of interconnected pore *** porosity of the β-TCP/CS scaffolds decrease with the increase of the content of the β-*** β-TCP/CS scaffolds have a highest compressive strength when the chitosan/β-TCP ratio is 30：*** present work displays that the β-TCP/CS composite scaffolds with appropriate mechanical properties and high porosity can be successfully prepared by the freeze-extraction and freeze-gelation methods.

关键词： freeze-extraction and freeze-gelation β-TCP/CS scaffolds

Strontium modulates osteogenic activity of bone cement composed of bioactive borosilicate glass particles by activating Wnt/β-catenin signaling pathway

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Bioactive Materials 2020年第2期5卷 334-347页

作者： Xu Cui Yadong Zhang Jianyun Wang Chengcheng huang Yudong Wang Hongsheng Yang Wenlong Liu Ting Wang Deping Wang Guocheng Wang Changshun Ruan Dafu Chen William W.Lu wenhai huang Mohamed N.Rahaman Haobo Pan Center for Human Tissues and Organs Degeneration Shenzhen Institutes of Advanced TechnologyChinese Academy of ScienceShenzhen518055PR China Schools of Materials Science and Engineering Tongji UniversityShanghai201804PR China Department of Orthopaedics Shanghai Fengxian Central HospitalSouth Campus of the Sixth People's Hospital Affiliated to Shanghai Jiao Tong UniversityShanghai201499PR China Department of Orthopaedics Fengxian Central Hospital Affiliated to Southern Medical UniversityShanghai201499PR China Shenzhen Healthemes Biotechnology Co.Ltd Shenzhen518102PR China Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma Department of OrthopaedicsThe University of Hong Kong-Shenzhen HospitalUniversity of Hong KongShenzhen518053PR China Laboratory of Bone Tissue Engineering Beijing Laboratory of Biomedical MaterialsBeijing Research Institute of Orthopaedics and TraumatologyBeijing Jishuitan HospitalBeijing100035PR China Department of Orthopaedics and Traumatology The University of Hong KongRoom 907Lab Block21 Sassoon RoadHong Kong SARPR China Department of Materials Science and Engineering Missouri University of Science and TechnologyMO65409-0340USA

There is a need for synthetic grafts to reconstruct large bone defects using minimal invasive *** previous study showed that incorporation of Sr into bioactive borate glass cement enhanced the osteogenic capacity in ***,the amount of Sr in the cement to provide an optimal combination of physicochemical properties and capacity to stimulate bone regeneration and the underlying molecular mechanism of this stimulation is yet to be *** this study,bone cements composed of bioactive borosilicate glass particles substituted with varying amounts of Sr(0 mol%to 12 mol%SrO)were created and evaluated in vitro and in *** setting time of the cement increased with Sr substitution of the *** immersion in PBS,the cement degraded and converted more slowly to HA(hydroxyapatite)with increasing Sr *** released Sr2+modulated the proliferation,differentiation,and mineralization of hBMSCs(human bone marrow mesenchymal stem cells)in *** characteristics were optimally enhanced with cement(designated BG6Sr)composed of particles substituted with 6mol%*** implanted in rabbit femoral condyle defects,BG6Sr cement supported better peri-implant bone formation and bone-implant contact,comparing to cements substituted with 0mol%or 9mol%*** underlying mechanism is involved in the activation of Wnt/β-catenin signaling pathway in osteogenic differentiation of *** results indicate that BG6Sr cement has a promising combination of physicochemical properties and biological performance for minimally invasive healing of bone defects.

关键词： Injectable bone cement Bioactive borosilicate glass Strontium Signaling pathway Bone regeneration

Development of a Zebrafish Model for Rapid Drug Screening against Alzheimer＇s Disease

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Journal of Pharmacy and Pharmacology 2016年第4期4卷 162-173页

作者： wenhai huang Chuansheng Li Zhengrong Shen Xiaoyu Zhu Bo Xia Chunqi Li Institute of Materia Medica Zhejiang Academy of Medical Sciences Hangzhou 310013 Zhejiang Province China Hunter Biotechnology Inc. Transfarland Hangzhou 310013 Zhejiang Province China

Alzheimer＇s disease, the leading cause of dementia in the elderly, is a complex neurodegenerative disorder which leads to a progressive decline in cognitive functions. A rapid screening model is highly demanded for identification and evaluation of novel anti-Alzheimer＇s disease drugs from a large numbers of compounds. Until now, numerous studies utilized zebrafish model for drug discovery. Since aluminum can induce a similar biological activity in zebrafish as in Alzheimer patients, in this study, we developed a novel animal model using 3 to 5 day post-fertilization larval zebrafish by optimizing the doses and duration of aluminum chloride exposure. Six anti-Alzheimer＇s disease drugs with a variety of mechanisms were tested to validate the newly developed zebrafish model. Importantly, Rivastigmine, ThT, Flurbiprofen and AM-117 could increase the value of Dyskinesia Recovery Rate by 53.4-64%, 169.4-200%, 54.5-96% and 70.9-121%, respectively. Rivastigmine, Memantine, ThT, Flurbiprofen, Rosiglitazone and AM-117 improved the value of Response Efficiency by 86.6-175.1%, 28.2-66.6%, 127.2-236.5%, 118.3-323.7%, 26.6-140.8% and 70.2-161.4%, respectively. Our results suggest that the zebrafish model developed in this study could be a useful tool for high throughput screening of potential novel anti-Alzheimer＇s disease leading compounds targeting acetylcholinesterase, N-methyl-D-aspartic acid receptor, γ-secretase, peroxisome proliferator-activated receptor-γand amyloid-β.

关键词： Alzheimer's disease 3-5dpf Larvae screening platform zebrafish model.