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Enhanced Mn^(2+)solidification and NH_(4)^(+)-N removal from electrolytic manganese metal residue via surfactants

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Chinese Journal of Chemical Engineering 2022年第9期35卷 205-212页

作者： Jiancheng Shu Xiangfei Zeng Danyang Sun Yong Yang Zuohua Liu Mengjun Chen daoyong tan School of Environment and Resource Southwest University of Science and TechnologyMianyang 621010China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China

Electrolytic manganese metal residue(EMMR)harmless treatment has always lacked a low-cost and quick processing *** this study,surfactants,namely tetradecyl trimethylammonium chloride(TTC),sodium dodecyl benzene sulfonate(SDBS),sodium lignin sulfonate(SLS),and octadecyl trimethylammonium chloride(OTC),were used in the solidification of Mn^(2+)and removal of NH_(4)^(+)-N from *** Mn^(2+)and NH_(4)^(+)-N concentrations under different reaction conditions,Mn^(2+)solidification and NH_(4)^(+)-N removal mechanisms,and leaching behavior were *** results revealed that the surfactants could enhance the Mn^(2+)solidification and NH_(4)^(+)-N removal from EMMR,and the order of enhancement was as follows:TTC>SDBS>OTC>*** NH_(4)^(+)-N and Mn^(2+)concentrations were 12.3 and 0.05 mg·L^(-1)with the use of 60.0 mg·kg^(-1)TTC under optimum conditions(solid–liquid ratio of 1.5:1,EMMR to BRM mass ratio of 100:8,temperature of 20℃,and reaction duration of 12 h),which met the integrated wastewater discharge standard(GB8978-1996).Mn^(2+)was mainly solidified as Mn(OH)_(2),MnOOH and MnSiO_(3),and NH_(4)^(+)-N in EMMR was mostly removed in the form of *** results of this study could provide a new idea for cost-effective EMMR harmless treatment.

关键词： Electrolytic manganese metal residue Mn^(2+)solidification NH_(4)^(+)-N removal Surfactants

High-performance cascade nanoreactor based on halloysite nanotubes-integrated enzyme-nanozyme microsystem

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Chinese Chemical Letters 2022年第2期33卷 807-811页

作者： Yan Liu Rui Lv Shiyong Sun daoyong tan Faqin Dong Yevgeny A.Golubev Xiaoqin Nie Olga B.Kotova Jin Liu Ke Wang School of Environment and Resource Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010China Yushkin’s Institute of Geology Komi Science CenterUral Branch of RASul.Pervomayskaya54Syktyvkar 167982Russia

Various enzymatic reactions or enzymatic cascade reactions occur efficiently in biological microsystems due to space constraints or orderly transfer of intermediate products. Inspired by this, the horseradish peroxidase(HRP)-like nanozyme(Fe-aminoclay) was in situ synthesized on the surface of alkali-activated halloysite nanotubes and the natural enzyme(glucose oxidase, GOx) was immobilized on it to construct a high-efficiency GOx-Fe AC@AHNTs cascade nanoreactor. In which, Fe AC@AHNTs can not only be used as a carrier for immobilized enzymes, but also help its catalytic activity to cooperate with glucose oxidase in a cascade reaction. The microcompartments and substrate channel effect of this enzyme-nanozyme microsystem exhibit a superior catalytic performance than that of natural enzyme system, and exhibits excellent long-term stability and recyclability. Subsequently, the GOx-Fe AC@AHNTs cascade nanoreactor was employed as a glucose colorimetric platform, which displayed a low detection limit(0.47 μmol/L)in glucose detection. This enzyme-nanoenzyme nanoreactor provides a simple and effective example for constructing a multi-enzyme system with limited space, and lays the foundation for subsequent research in the fields of biological analysis and catalysis.

关键词： Halloysite nanotubes Fe-aminoclay Nanozyme Cascade nanoreactor Catalysis enhancement

Calcification response of Pleurochrysis carterae to iron concentrations in batch incubations： implication for the marine biogeochemical cycle

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Frontiers of Structural and Civil Engineering 2017年第4期11卷 682-688页

作者： Xiang ZOU Shiyong SUN Sen LIN Kexuan SHEN Faqin DONG daoyong tan Xiaoqin NIE Mingxue LIU Jie WEI School of Environment and Resources Key Laboratory of Solid Waste Treatment and Resource Recycle Southwest University of Science and Technology Mianyang 621010 China State Key Laboratory of Marine Geology TonNi University Shanghai 200092 China Low-cost Wastewater Treatment Technology International Sci-Tech Cooperation Base of Sichuan Province Mianyang 621010 China

Calcified coccolithophores, a diverse and widely distributed group of marine microalgae, produce biogenic calcite in the form ofcoccoliths located on the cell surface. Using batch incubations of the coccolithophorid Pleurochrysis carterae, we investigated the responses of this calcification process to iron concentrations by changing the iron supply in the initial culture media from a normal concentration to 1 ppm （parts per million）, 5 ppm, and 10 ppm. Time-dependent measurements of cell population, production of inorganic carbon （coccoliths）, and organic carbon （organic cellular components） showed that elevated iron supply in the growth medium of P. carterae stimulates carbon sequestration by increasing growth along enhanced photosynthetic activity and calcification. In addition, the acquired time-dependent UV-Vis and FT-IR spectra revealed that iron fertilization- enhanced coccolith calcification is accompanied by a crystalline phase transition from calcite to aragonite or amorphous phase. Our results suggest that iron concentration has a significant influence on the marine carbon cycle of coccolithophores.

关键词： calcification coccolithophores iron fertiliza- tion Pleurochrysis carterae

Phase Behaviour and Physical Properties of Alkane Solvent（s）/CO2/N2/DME/Water/Heavy Oil Systems under Reservoir Conditions

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油气地质与采收率 2024年第2期 175-208页

作者： YANG daoyong LI Yunlong HUANG Desheng Energy Systems Engineering Faculty of Engineering and Applied Science University of Regina

The hybrid steam-solvent injection has been considered as a promising technique for enhancing heavy oil/bitumen recov‐ery,while its main mechanisms including the heat transferred and dissolution of solvents (e.g.,CH4,C2H6,C3H8,C4H10,CO2,N2,and DME) into heavy oil/bitumen to reduce its viscosity and swell it are closely related to the phase behaviour of the solvents/water/heavy oil *** allow the seamless integration with the existing reservoir simulators,the traditional cubic equations of state （i.e.,SRK EOS and PR EOS） have been modified and improved to accurately quantify the phase behaviour and physical prop‐erties of the aforementioned systems under equilibrium and nonequilibrium ***,a huge database has been built to de‐velop the corresponding alpha functions by minimizing the deviation between the measured and calculated vapour pressures for wa‐ter as well as non-hydrocarbon and hydrocarbon compounds available from the public *** obtained alpha functions are fur‐ther validated with enthalpy of vaporization for pure substances,and then the reduced temperature has been optimized and the ec‐centric factor has been ***,a pressure-implicit strategy has been developed to optimize the binary interaction param‐eters （BIPs） by treating heavy oil as one pseudocomponent （PC） or multiple ***,the contributions of each solvent to the aforementioned systems have been compared and analyzed within a consistent and unified *** addition to new alpha func‐tions for hydrocarbons and water,respectively,the reduced temperature is found to have its optimum value of 0.59 for the two equa‐tions of state （EOSs）,while 0.60 is recommended for practical *** improved EOSs have been further employed to reproduce the experimentally measured multiphase boundaries （or pseudo-bubble-point pressures）,density,viscosity,（mutual） solubility,and preferential mass transfer for the aforementioned mixtures under equilibrium and nonequilibrium

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富镁与贫镁坡缕石的红外光谱

硅酸盐学报 2013年第1期41卷 89-95页

作者：颜文昌袁鹏谭道永吴大清刘冬中国科学院广州地球化学研究所广州510640 安徽建筑工业学院土木工程学院合肥230022

研究了安徽明光富镁坡缕石和江苏盱眙贫镁坡缕石及其热处理产物的红外光谱特征(尤其是中低频区域),结果表明:坡缕石的红外光谱特征峰为1 196 cm-1(连接倒转SiO4四面体的Si—O—Si非对称伸缩振动),647 cm-1(与孔道边缘MgO6八面体配位的... 详细信息

研究了安徽明光富镁坡缕石和江苏盱眙贫镁坡缕石及其热处理产物的红外光谱特征(尤其是中低频区域),结果表明:坡缕石的红外光谱特征峰为1 196 cm-1(连接倒转SiO4四面体的Si—O—Si非对称伸缩振动),647 cm-1(与孔道边缘MgO6八面体配位的结晶水相关的H2O—Mg—OH2振动)。由于八面体中阳离子占位差异,垂直的Si—O—M(Ⅵ)非对称伸缩振动与对称伸缩振动峰在盱眙贫镁坡缕石中分别出现在998cm-1和685cm-1,明光富镁坡缕石中则分别显示为987 cm-1和680 cm-1,而且富镁的坡缕石一般出现特征峰3 687 cm-1(Mg3—OH伸缩振动)。此外,明光富镁坡缕石样品中存在的865cm-1峰应为杂质无定形碳酸盐的CO32-弯曲振动。

关键词：坡缕石红外光谱热处理

The Effect of Temperature on Transformation of Kaolinite to Halloysite-like Nanoroll Via One-step Delamination

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矿物学报 2013年第S1期33卷 91-91页

作者： tan daoyong YUAN Peng Faza Annabi-Bergaya LIU Dong LIU Hongmei Guangzhou Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences Centre de Recherche sur la Matière Divisée CNRS-Université d'OrléansOrleansFrance

Tubular halloysite is a hydrated polymorph of kaolinite, commonly considered as its associated mineral. Due to its unique mesoscopic (2–50 nm) tubular structure, it has attracted great interest in the field of adsorption, catalysis, and nanocarrier. The halloysites in different deposits present various morphological properties which significantly affect the interface reactions with functional guests. These scattered properties in addition to their low purity severely limit the actual applications of halloysite in industry.

关键词： kaolinite halloysite-like nanoroll intercalation reaction temperature thermal stability

Natural Tubular Halloysite as Drug Carrier: Effect of Organosilane Modification and Thermal Treatment

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矿物学报 2013年第S1期33卷 131-131页

作者： YUAN Peng tan daoyong Annabi-Bergaya Faza LIU Dong LIU Hongmei CAS Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of Sciences University of Chinese Academy of Sciences Centre de Recherche sur la Matière Divisée CNRS-Université d'OrléansOrléans 45071France

Naturally occurring tubular halloysite is a potential drug carrier because of the significant deposit, unique mesoscopic (2-50 nm) or even macroscopic (>50 nm) lumen, and excellent biocompatibility. The drugs loaded on halloysite exhibited slow release under the diffusion limitation by the halloysite nanotube. However, due to the weak interaction between halloysite and guest, the loading capacity of halloysite was relatively low. This drawback severely limits the application of halloysite as carrier in pharmaceutics. In this study, the performance of halloysite as carrier for ibuprofen (IBU) loading was investigated for the first time. The effects of 3-aminopropyltriethoxysilane (APTES) modification and thermal treatment of halloysite on the loading and release of IBU were also studied. The purified halloysites were heated at 120 ℃ and 400 ℃ (labeled as Hal/120 and Hal/400), and then modified with APTES (labeled as Hal/120-A and Hal/400-A). The loading of IBU was achieved by soaking method (labeled as IBU-Hal/120, IBU-Hal/400, IBU-Hal/120-A, and IBU-Hal/400-A.). The in vitro drug delivery assays were performed in phosphate buffer solution. IBU was loaded mainly into the lumen and partially on the external surface of halloysite. The order of IBU contents was as follows: IBU-Hal/400-A (14.8wt%) > IBU-Hal/120-A (12.7wt%) > IBU-Hal/400 (11.8wt%) > IBU-Hal/120 (11.7wt%). The IBU was initially anchored to the surface hydroxyl groups of halloysite by hydrogen bonding, followed by further bonding of IBU with the anchored IBU to form hydrogen-bonded aggregates. The APTES modification of halloysite promoted the loading of IBU by introducing a strong affinity through electrostatic attraction between the introduced aminopropyl groups of APTES and the carboxyl groups of IBU. Thermal treatment at 400°C did not destroy the tubular morphology or the crystal structure of halloysite and had little effect on IBU loading in unmodified halloysite. However, thermal treatment by reducing

关键词： halloysite ibuprofen drug delivery organosilane modification thermal treatment

Physically Activated Diatomite-templated Carbon with High Porosity for the Adsorption of Methylene Blue

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矿物学报 2013年第S1期33卷 55-55页

作者： LIU Dong YUAN Weiwei YUAN Peng YU Wenbin tan daoyong LIU Hongmei HE Hongping CAS Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of Sciences University of Chinese Academy of Sciences

Porous carbons are extensively applied in gas separation, water purification, catalytic reaction, and electrochemical processing, attributing to their high specific surface area, large pore volume, chemical inertness, and good mechanical and thermal stability. The templating method is widely used to synthesize porous carbons with the controlled pore structure. Among them, preparation of diatomite-templated carbons attracts increasing attention because the obtained carbon has unique developed macropores and exhibits the promising application in adsorption and support of large-sized molecules. Macroporous diatomite-templated carbons are prepared by using additive or inherent solid acid sites of diatomite as the catalyst. The obtained carbons showed tubular and pillared macroporous structures, and had a few mesopores and micropores. However, the carbons possessed the small specific surface area and micropore volume, and thus showed the low adsorption capacity of small-sized molecules, such as methylene blue (MB). In this case, enhancement of porosity, especially microporosity, is necessary.

关键词： diatomite-templated carbon physical activation porosity adsorption of methylene blue

Methane Adsorption on Montmorillonite, Kaolinite and Illite at High Pressures

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矿物学报 2013年第S1期33卷 54-54页

作者： LIU Dong YUAN Peng LIU Hongmei tan daoyong YUAN Weiwei ZHOU Xiang HE Hongping CAS Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of Sciences University of Chinese Academy of Sciences

Shale gas, which is derived from organic matters in shale and stored in shale deposits, is an important unconventional gas resource and attracts attention due to its significant requirement in the hydrocarbon production. Methane (CH4) is the dominant component of shale gas, and adsorbed gas is an important reservoir form. Many studies have investigated the adsorption capacities and adsorption mechanisms of CH4 in shale. Organic matters and clay minerals have been proposed to be the two major components for CH4 adsorption. Adsorption of CH4 in organic matters, such as the adsorption capacity and effects of characteristics of the organic matters, has been well investigated. However, studies on CH4 adsorption on clay minerals have mainly focused on evaluating the adsorption capacity, and very little information about the adsorption mechanism has been provided. For example, the adsorption sites and factors influencing CH4 adsorption on clay minerals remain unclear. Three main reasons account for this: (1) the co-existence of organic matters in samples affects the evaluation of CH4 adsorption on clay minerals; (2) the pressures used during adsorption are not representative of actual reservoir pressures; and (3) the clay minerals selected have low swelling capacity and a smaller interlayer distances than a CH4 size, resulting in the misunderstanding of the CH4 adsorption sites.

关键词： methane (CH4) adsorption clay minerals interlayer space montmorillonite high pressure