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| 1 | Phosphate removal and recovery through crystallization of hydroxyapatite using xonotlite as seed crystal显示文摘Xonotlite was synthesized and tested for phosphate removal and recovery from synthetic solution in a batch mode. The effects of pH, initial calcium concentration, bicarbonate concentration on phosphate removal through crystallization were examined. The morphology and X-ray diffraction (XRD) pattern of xonotlite before and after crystallization confirmed the formation of crystalline hydroxyapatite. The results indicated that the crystallization product had a very high P content (> 10%), which is comparable to phosphate rock at the dosage of 50-200 mg xonotlite per liter, with a maximum P content of 16.7%. The kinetics of phosphate removal followed the second-order reaction equation. The phosphate removal ability increased with increasing pH. The precipitation of calcium phosphate took place when pH was higher than 7.2, whereas the crystallization occurred at pH 6.0. A high calcium concentration could promote the removal of phosphate via crystallization, while a high bicarbonate concentration also enhanced phosphate removal, through that the pH was increased and thus induced the precipitation process. When xonotlite was used to remove phosphate from wastewater, the removal effciency could reach 91.3% after 24 h reaction, with removal capacity 137 mg/g. The results indicated that xonotlite might be used as an effective crystal seed for the removal and recovery of phosphate from aqueous solution. | CHEN Xuechu, KONG Hainan, WU Deyi, WANG Xinze, LIN Yongyong School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China | 2009 | Journal of Environmental Sciences2009，21，5： | 24 |
| 2 | Temperature dependence of the point defect properties of GaN thin films studied by terahertz time-domain spectroscopy显示文摘The dielectric functions of GaN for the temperature and frequency ranges of 10–300 K and 0.3–1 THz are obtained using terahertz time-domain spectroscopy.It is found that there are oscillations of the dielectric functions at various temperatures.Physically,the oscillation behavior is attributed to the resonance states of the point defects in the material.Furthermore,the dielectric functions are well fitted by the combination of the simple Drude model together with the classical damped oscillator model.According to the values of the fitting parameters,the concentration and electron lifetime of the point defects for various temperatures are determined,and the temperature dependences of them are in accordance with the previously reported result.Therefore,terahertz time-domain spectroscopy can be considered as a promising technique for investigating the relevant characteristics of the point defects in semiconductor materials. | FANG HeNan ZHANG Rong LIU Bin LI YeCao FU DeYi LI Yi XIE ZiLi ZHUANG Zhe ZHENG YouDou WU JingBo JIN BiaoBing CHEN Jian WU PeiHeng | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，11： | 6 |
| 3 | Structural and biochemical mechanism for increased infectivity and immune evasion of Omicron BA.2 variant compared to BA.1 and their possible mouse origins显示文摘The Omicron BA.2 variant has become a dominant infective strain worldwide.Receptor binding studies show that the Omicron BA.2 spike trimer exhibits 11-fold and 2-fold higher potency in binding to human ACE2 than the spike trimer from the wildtype(WT)and Omicron BA.1 strains.The structure of the BA.2 spike trimer complexed with human ACE2 reveals that all three receptor-binding domains(RBDs)in the spike trimer are in open conformation,ready for ACE2 binding,thus providing a basis for the increased infectivity of the BA.2 strain.JMB2002,a therapeutic antibody that was shown to efficiently inhibit Omicron BA.1,also shows potent neutralization activities against Omicron BA.2.In addition,both BA.1 and BA.2 spike trimers are able to bind to mouse ACE2 with high potency.In contrast,the WT spike trimer binds well to cat ACE2 but not to mouse ACE2.The structures of both BA.1 and BA.2 spike trimer bound to mouse ACE2 reveal the basis for their high affinity interactions.Together,these results suggest a possible evolution pathway for Omicron BA.1 and BA.2 variants via a human-cat-mouse-human circle,which could have important implications in establishing an effective strategy for combating SARS-CoV-2 viral infections. | Youwei Xu Canrong Wu Xiaodan Cao Chunyin Gu Heng Liu Meriting Jiang Xiaoxi Wang Qingning Yuan Kai Wu Jia Liu Deyi Wang Xianqing He Xueping Wang Su-Jun Deng H.Eric Xu Wanchao Yin | 2022 | Cell Research2022，32，7： | 6 |
| 4 | A new sorbent that simultaneously sequesters multiple classes ofpollutants from water: Surfactant modified zeolite显示文摘A zeolite (ZFA) was synthesized from coal fly ash and then modified using hexadecyltrimethylammonium. The surfactant modified ZFA (SMZFA) was evaluated for its versatility to sequester multiple classes of pollutants from water. The target pollutants include ionic inorganic pollutants (ammonium and phosphate), ionic organic pollutants (methylene blue and humic acid), ionizable organic pollutants (bisphenol A,-chlorophenol and phenol, with different pKa), and electrically neutral or-ganic pollutants (aniline, nitrobenzene, and naphthalene, with different hydrophobicity). The SMZFA showed high potential for the retention of ammonium and phosphate, being comparable with ZFA. While the negative charge in the internal pores of zeolite was responsible for the retention of ammonium, the oxides of CaO, Al2O3and Fe2O3in the non-zeolite fraction, which originated from coal fly ash but received modification during zeolite synthesis, accounted for the removal of phosphate. Results also showed that while ZFA had little affinity for humic acid, the ionizable, and the electrically neutral organic compounds, SMZFA exhibited greatly enhanced adsorption capacity. Thus, the surfactant modified external surface, which formed a bilayer micelle of zeolite, imparts a hydrophobic characteristic that enables the uptake of the organic pollutants. We showed that SMZFA is a promising versatile sorbent for water treatment. | XIE Qiang XIE Jie CHI LiNa LI ChunJie WU DeYi ZHANG ZhenJia KONG HaiNan | 2013 | Science China(Technological Sciences)2013，56，7： | 5 |
| 5 | Future vehicles:interactive wheeled robots显示文摘Owing to the lack of variety of interactions in automatic driving,the interactive cognition and evolution growth of self-driving vehicles in uncertain and complex environments have been proposed,making future vehicles interactive wheeled robots. | Nan MA Deyi LI Wen HE Yue DENG Jiahong LI Yue GAO Hong BAO Huan ZHANG Xinkai XU Yuansheng LIU Zhixuan WU Li CHEN | 2021 | Science China(Information Sciences)2021，64，5： | 4 |
| 6 | Experimental study on the deformation behaviour,energy evolution law and failure mechanism of tectonic coal subjected to cyclic loads显示文摘Compared to intact coal,tectonic coal exhibits unique characteristics.The deformation behaviours under cyclic loading with different confining pressures and loading rates are monitored by MTS815 test system,and the mechanical and energy properties are analysed using experimental data.The results show that the stress-strain curve could be divided into four stages in a single cycle.The elastic strain and elastic energy density increase linearly with deviatoric stress and are proportional to the confining pressure and loading rate;irreversible strain and dissipated energy density increase exponentially with deviatoric stress,inversely proportional to the confining pressure and loading rate.The internal structure of tectonic coal is divided into three types,all of which are damaged under different deviatoric stress levels,thereby explaining the segmentation phenomenon of stress-strain curve of tectonic coal in the cyclic loading process.Tectonic coal exhibits nonlinear energy storage characteristics,which verifies why the tectonic coal is prone to coal and gas outburst from the principle of energy dissipation.In addition,the damage mechanism of tectonic coal is described from the point of energy distribution by introducing the concepts of crushing energy and friction energy. | Deyi Gao Shuxun Sang Shiqi Liu Jian Wu Jishi Geng Wang Tao Tengmin Sun | 2022 | International Journal of Mining Science and Technology2022，32，6： | 3 |
| 7 | Use of zeolitized coal fly ash in the simultaneous removal of ammonium and phosphate from aqueous solution显示文摘Discharge of wastewater containing nitrogen and phosphate can cause eutrophication.Therefore,the development of an efficient material for the immobilization of the nutrients is important.In this study,a low calcium fly ash and high calcium fly ash were converted into zeolite using the hydrothermal method.The removal of ammonium and phosphate that coexist in aqueous solution by the synthesized zeolites were studied.The results showed that zeolitized fly ash could efficiently eliminate ammonium and phosphate at the same time.Saturation of zeolite with Ca^(2+)rather than Na+favored the removal of both ammonium and phosphate because the cation exchange reaction by the NH_(4)^(+)resulted in the release of Ca2+into the solution and precipitation of Ca^(2+)with PO_(4)^(3−)followed.An increase in the temperature elevated the immobilization of phosphate whereas it abated the removal of ammonium.Nearly 60%removal efficiency for ammonium was achieved in the neutral pH range from 5.5 to 10.5,while the increase or decrease in pH out of the neutral range lowered the adsorption.In contrast,the removal of phosphate approached 100%at a pH lower than 5.0 or higher than 9.0,and less phosphate was immobilized at neutral pH.However,there was still a narrow pH range from 9.0 to 10.5 favoring the removal of both ammonium and phosphate.It was concluded that the removal of ammonium was caused by cation exchange;the contribution of NH3 volatilization to immobilization at alkaline conditions(up to pH level of 11.4)was limited.With respect to phosphate immobilization,the mechanism was mainly the formation of precipitate as Ca_(3)(PO_(4))_(2) within the basic pH range or as FePO_(4) and AlPO_(4) within acidic pH range. | WU Deyi HU Zhanbo WANG Xinze HE Shengbing KONG Hainan | 2007 | Frontiers of Environmental Science & Engineering2007，1，2： | 2 |
| 8 | Remediation of chromite ore processing residue by pyrolysis process with sewage sludge显示文摘 | Dalei Zhang Hainan Kong Deyi Wu Shengbing He Zhanbo Hu Xiaofang Hu | 2009 | Bioresource Technology2009，，11： | 1 |
| 9 | Treatment of Chromite Ore Processing Residue by pyrolysis with rice straw显示文摘 | Dalei Zhang Shengbing He Luwei Dai Xiaofang Hu Deyi Wu Kangjin Peng Guanhuan Bu Hao Pang Hainan Kong | 2009 | Chemosphere2009，，8： | 1 |
| 10 | Phosphate immobilization from aqueous solution by fly ashes in relation to their composifion显示文摘 | Jiangang Chen Hainsa Kong Deyi Wu | | 0，，： | 1 |
| 11 | Simultaneous removal of ammonium and phosphate by zeolite synthesized from fly ash as influenced by salt treatment 显示文摘 | Wu Deyi Zhang Baohua Li Chunjie | 2006 | Journal of Colloid and Interface Science2006，304，： | 1 |
| 12 | A analysis on the mechanism and influ--encing factors of inter- layer separation of complex roof in deep coal mining 显示文摘 | Wu Deyi Wang Ailan Liang Huaqiang | | Advane--ed Materials Research0，146，： | 1 |
| 13 | Adsorption of bisphenol a from water by surfactant-modified zeolite 显示文摘 | Dong Yi Wu Deyi Chen Xueehu et ai | 2010 | Journal of Colloid and Interface Science2010，348，2： | 1 |
| 14 | Removal of organic pollutants by surfactant modified zeolite: Comparison between ionizable phenolic compounds and non-ionizable organic compounds显示文摘 | Jie Xie Wenna Meng Deyi Wu Zhenjia Zhang Hainan Kong | 2012 | Journal of Hazardous Materials2012，，： | 1 |
| 15 | Application of zeolitic material synthesized from thermally treated sediment to the removal of trivalent chromium from wastewater显示文摘 | Qingyu Guan Deyi Wu Yan Lin | 2009 | Journal of Hazardous Materials2009，167，13： | 1 |
| 16 | Removal of phosphate from aqueous solution by zeolite synthesized from fly ash显示文摘 | Chen Jiangang Kong Hainan Wu Deyi | 2006 | Journal of Colloid and Interface Science2006，300，2： | 1 |
| 17 | Simultaneous removal of ammonium and phosphate by zeolite synthesized from fly ash as influenced by salt treatment显示文摘 | Wu Deyi Zhang Baohua Li Chunjie | 2006 | Journal of Colloid and Interface Science2006，304，2： | 1 |
| 18 | Simultaneous removal of ammonium and phosphate by zeolite synthesized from fly ash as influenced by salt treatment显示文摘 | Deyi Wu Baohua Zhang Chunjie Li | | 0，，： | 1 |
| 19 | Surfactant modified zeolite as adsorbent for removal of humic acid from water显示文摘 | LI Junjie DONG Yang WU Deyi | 2011 | Applied clay science2011，52，： | 1 |
| 20 | Simultaneous removal of ammonium and phosphate by zeolite synthesized from fly ash as influenced by salt treatment 显示文摘 | Wu Deyi Zhang Baohua Li Chunjie | 2006 | Journal of Colloid and Interface Science2006，304，2： | 1 |
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