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Kinetic Adsorption of Ammonium Nitrogen by Substrate Materials for Constructed Wetlands

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Pedosphere 2011年第4期21卷 454-463页

作者： ZHU Wen-ling cui li-hua OUYANG Ying LONG cui-Fen TANG Xiao-Dan College of Natural Resources and Environmental Science South China Agricultural University Guangzhou 510642 (China) Urban Drainage Monitoring Station of Guangzhou City Guangzhou 510010 (China) Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions South China Agricultural University Guangzhou 510642 (China) Department of Water Resources St. Johns River Water Management District Palatka Florida 32178 (USA)

Constructed wetlands （CWs） are engineered systems that utilize natural systems including wetland vegetations, soils, and their associated microbial assemblages to assist in treating wastewater. The kinetic adsorption of ammonium nitrogen （NH＋-N） by CW substrate materials such as blast furnace slag （BFS）, zeolite, ceramsite, vermiculite, gravel, paddy soil, red soil, and turf, was investigated using batch experiments and kinetic adsorption isotherms. Both Freundlich and Lang- muir isotherms could adequately predict the NH＋-N adsorption process. The maximum adsorption capacities of NH＋-N, estimated from the Langmuir isotherm, ranked as： zeolite （33 333.33 mg kg^-1）〉 turf （29274.01 mg kg^-1）〉 BFS （5000 mg kg^-1）〉 vermiculite （3333.33 mg kg^-1）〉 gravel （769.23 mg kg^-1）〉 paddy soil （588.24 mg kg^-1）〉 red soil （555.56 mg kg^-1）〉 ceramsite （107.53 mg kg^-1）. Some properties of the substrate materials, including bulk density, specific gravity, hydraulic conductivity, uniformity coefficient （K60）, curvature coefficient （Co）, organic matter, pH, exchangeable （or active） Cu, Fe, Zn and Mn, total Cu, and Fe, Mn, Zn, Cd, Pb and Ca, had negative correlations with NH＋-N adsorption. Other properties of the substrate materials like particle diameter values of D10, 030 and 060 （the diameters of particle sizes of a substrate material at which 10%, 30% and 60%, respectively, of the particles pass through the sieve based on the accumulative frequency）, cation exchange capacity （CEC）, exchangeable （or active） Ca and Mg, and total K and Mg had positive correlations with NH＋-N adsorption. In addition, active K and Na as well as the total Na had significant positive correlations with NH＋-N adsorption. This information would be useful for selection of suitable substrate materials for CWs.

关键词： ammonia removal kinetic adsorption capacity Langmuir isotherm physicochemical properties substrate materials

Performance of hybrid constructed wetland systems for treating septic tank effluent

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Journal of Environmental Sciences 2006年第4期18卷 665-669页

作者： cui li-hua liU Wen ZHUXi-zhen MA Mei huaNG Xi-hua XIA Yan-yang Department of Environmental Science and Engineering South China Agricultural University Guangzhou 510642 China Coast to Coast Analytical Specialists Garland TX 75081 USA

The integrated wetland systems were constructed by combining horizontal-flow and vertical-flow bed, and their purification efficiencies for septic tank effluent were detected when the hydraulic retention time （HRT） was 1 d, 3 d, 5 d under different seasons. The results showed that the removal efficiencies of the organics, phosphorus were steady in the hybrid systems, but the removal efficiency of total nitrogen was not steady due to high total nitrogen concentration in the septic tank effluent. The average removal rates of COD （chemical oxygen demand） were 89%, 87%, 83%, and 86% in summer, autumn, winter and spring, respectively, and it was up to 88%, 85%, 73%, and 74% for BOD5 （5 d biochemical oxygen demand） removal rate in four seasons. The average removal rates of TP （total phosphorous） could reach up to 97%, 98%, 95%, 98% in four seasons, but the removal rate of TN （total nitrogen） was very low. The results of this study also indicated that the capability of purification was the worst in winter. Cultivating with plants could improve the treated effluent quality fTom the hybrid systems. The results of the operation of the horizontal-flow and vertical-flow cells （hybrid systems） showed that the removal efficiencies of the organics, TP and TN in horizontal-flow and vertical-flow cells were improved significantly with the extension of HRT under the same season. The removal rate of 3 d HRT was obviously higher than that of 1 d HRT, and the removal rate of 5 d HRT was better than that of 3 d HRT, but the removal efficiency was not very obvious with the increment of HRT. Therefore, 3 d HRT might be recommended in the actual operation of the hybrid systems for economic and technical reasons.

关键词： constructed wetlands hybrid system horizontal-flow vertical-flow removal efficiency septic tank effluent

Modified Da-chai-hu Decoction regulates the expression of occludin and NF-κB to alleviate organ injury in severe acute pancreatitis rats

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Chinese Journal of Natural Medicines 2019年第5期17卷 355-362页

作者： ZHAO Guang ZHUO Yu-Zhen cui li-hua li Cai-Xia CHEN Sha-Yan li Dan liU Jun-Hong li Di-hua cui Nai-Qiang ZHANG Shu-Kun Hepatobiliary and Pancreatic Surgery Tianjin Nankai Hospital Tianjin Hospital of Integrated Traditional Chinese and Western medicine Nankai Clinical College Tianjin Medical University Institute of Integrated Traditional Chinese and Western medicine Tianjin Nankai Hospital Tianjin Hospital of Integrated Traditional Chinese and Western medicine Department of Clinical Laboratory Tianjin Nankai Hospital Tianjin Hospital of Integrated Traditional Chinese and Western medicine

Modified Da-chai-hu Decoction(MDD), a traditional Chinese medicinal formulation, which was empirically generated from Da-chai-hu decoction, has been utilized to treat severe acute pancreatitis(SAP) for decades. The aim of the present study was to explore its potential organprotective mechanism in SAP. In the present study, rat SAP model was induced by retrograde injection of 3.5% sodium taurocholate into the biliopancreatic duct, MDD(23.35 g/kg body weight, twelve times the clinical dose) were orally given at 2 h before and 10 h after injection. At 12 h after model induction, blood was taken from vena cava for analysis of amylase, diamine oxidase(DAO), pulmonary surfactant protein-A(SP-A), and C-reactive protein(CRP). Histopathological change of pancreas, ileum and lung was assayed by H&E staining, myeloperoxidase(MPO) activity were determinated using colorimetric assay, and the expressions of occludin and nuclear factor-κB(NF-κB) were detected by real-time RT-PCR and western blot, respectively. In addition, the tissue concentrations of tumor necrosis factor-α(TNF-α), interleukin-1β(IL-1β), and monocyte chemoattractant protein-1(MCP-1) were measured by enzyme-linked immunosorbent assay(EliSA). The results showed that in SAP rats, MDD significantly alleviated histopathological damage, depressed the MPO activity and the concentrations of TNF-α, IL-1β, and MCP-1 of pancreas, ileum and lung, and reduced the serum levels of amylase [(3283.4±585.5) U·L^(-1) vs(5626.4±795.1) U·L^(-1)], DAO[(1100.1±334.3) U·L^(-1) vs(1666.4±525.3) U·L^(-1)] and CRP [(7.6±1.2) μg·mL^(-1) vs(17.8±3.8) μg·mL^(-1)]. However, the serum SP-A concentration [(106.1±16.6) pg·mL^(-1) vs(90.1±14.9) pg·mL^(-1)] was elevated when treated SAP rats with MDD. Furthermore, MDD increased the occludin expression and reduced the NF-κB expression in pancreas, ileum and lung of SAP rats. Our findings suggested that MDD administration was an effective therapeutic approach for SAP treatment. It could up-regulate o

关键词： Severe acute pancreatitis Modified Da-chai-hu Decoction Occludin Nuclear factor-κB Ileum Lung

Enhancement of Activity of SnO_(2)-doped In_(2)O_(3)/Al_(2)O_(3) Catalyst for NO Reduction with Propene in the Presence of H_(2)O and SO_(2)

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Chinese Chemical Letters 2005年第11期16卷 1535-1538页

作者： Xiang Yu cui Jun hua li Ji Ming HAO li Xin FU Department of Environmental Science and Engineering Tsinghua University Beijing 100084

The novel bimetallic Sn-Im/Al2O3 catalysts prepared by three methods for NO reduction by propene were investigated. The results showed that the catalytic activity was enhanced significantly in the presence of H2O on sol-gel catalyst, and the maximum NO conversion increased from 46% to 92%, even in the presence of 100 ppm SO2, NO conversion was still 80%.

关键词： Selective catalytic reduction De-NOx lean burn In2O3/Al2O3 Sn-Ir/A12O3.

A Zinc(Ⅱ) Coordination Polymer Based on a Polycarboxylate ligand: Synthesis, Crystal Structure, Photoluminescence and Photocatalysis

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Chinese Journal of Structural Chemistry 2019年第12期38卷 2148-2154页

作者： CHEN Xiao-li cui hua-li YANG hua liU lin WANG Xiao REN Yi-Xia WANG Ji-Jiang HAN Bo Yan'an University Key Laboratory of New Energy&New Function Materials Shaanxi Key Laboratory of Chemical Reaction EngineeringCollege of Chemistry and Chemical EngineeringYan'an UniversityYan'an 716000China

A new zinc coordination polymer（CP） {[Zn1.5（ttb）0.5（phen）（H2O）]·2 H2O}n（1）,（H6ttb = 3,4,5-tricarboxyl-（3?,4?,5?-tricarboxylazophenyl）benzene, phen = 1,10-phenanthroline）, has been hydrothermally synthesized and structurally characterized by single-crystal X-ray determination, IR and thermogravimetric analysis（TGA）. CP 1 crystallizes in the monoclinic system, space group C2/c with a = 12.402（3）, b = 15.231（3）, c = 22.233（4） ?, β = 94.388（3）°, Zn1.5C21H16N3O9, Mr = 552.42, V = 4187.3（15） ?3, Dc = 1.753 g/cm3, F（000） = 2240, μ = 1.795 mm-1, S = 1.041, GOF = 1.041, Rint = 0.0169, 2.36° 2σ（I）. The completely deprotonated（ttb）6- ion in 1 adopts an octadentate coordination mode（μ8-η2-η1-η1-η1-η1-η2）. Four of the carboxyl groups are coordinated with four zinc ions by monodentate, respectively. While the other two carboxyl groups are coordinated with four zinc ions by bidentate, respectively. So, CP 1 possesses a 3 D network structure cross-linked by（ttb）6-ion. The XRD, UV and photoluminescence properties of CP 1 were also studied. Remarkably, 1 exhibits photocatalytic activities for the degradation of dye（MO） under UV light irradiation and shows good stabilities towards UV-light photocatalysis.

关键词： zinc coordination polymer crystal structure photoluminescence photocatalysis

Long-term Thermo-oxidative Degradation Modeling of a Carbon Fiber Reinforced Polyimide Composite:Multistep Degradation Behaviors and Kinetics

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Chinese Journal of Polymer Science 2020年第11期38卷 1202-1213,I0007页

作者： Yi liu Xiao-Zhou Xu Song Mo Bang-Wei Lan Cai-Zhen Zhu cui-hua li Jian Xu lin Fan Institute of Low-dimensional Materials Genome Initiative College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China Laboratory of Advanced Polymer Materials Institute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

This study aims to disclose the thermo-oxidative degradation behaviors and kinetics of a carbon fiber reinforced polyimide(CFRPI)composite for modeling of the Iong-term degradation *** degradation behaviors were revealed through off-gas products analysis,and the overall kinetic interpretation was achieved from study of the mass-loss curves recorded under dynamic *** was found that thermooxidative degradati on of the CFRPI composite was a multistep process,which in eluded four main reaction *** most kinetic an alysis methods were derived from simple reactions described by a single kinetic triplet,they cannot be applied reliably to such a ***,we firstly separated the four overlapped reaction steps by peak fitting of derivative thermogravimetric curves using Fraser-Suzuki equation consider!ng the asymmetrical n ature of kin etic curves,and subsequently an a lyzed each in dividual reaction employing Friedma n method and experimental master-plots *** sets of kinetic triplets were determined to characterize the entire degradation *** validity of four corresponding kinetic triplets was confirmed by perfect simulation of mass-loss curves recorded at both dynamic conditions used in kinetic analysis and entirely different isothermal ***,modeling of Iong-term aging at 400°C of the CFRPI composite was successfully achieved based on these kinetic *** predicted mass loss and flexural property correlated well with experimental *** study can serve as a basis for rapid evaluation of the long-term durability of the CFRPI composite in various application environments.

关键词： Polyimide composite Thermo-oxidative degradation Multistep process Kinetics Long-term aging modeling

Wireless Autonomous Soft Crawlers for Adjustable Climbing Actuation

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Chinese Journal of Polymer Science 2023年第3期41卷 405-413,I0008页

作者： Lei Tian Ji-Ji Tan Wei-liang Dong Bo Yang cui-hua li Dai Wang Hai-Yu huang Xin-Tong li Cai-Zhen Zhu Jian Xu Institute of Low-Dimensional Materials Genome Initiative College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China

Artificial soft actuators,featured with non-equilibrium internal circumstance and fast,programmable shape transformations,have attracted strong research interest recently due to their flexibility,highly controllable,and ***,wireless soft actuators,achieving the locomotion on different large slopes with multiple energy conversion,have been rarely ***,we create a asymmetric bilayer strategy to construct autonomous soft crawler via“breathing”moisture to motivate the mechanical *** soft crawlers present conspicuous performances including periodic tumbler locomotion predicted via improved Timoshenko’s equation,multiple reversible shape-morphing(circle,helix,despiralization,etc.)determined by their fiber orientation,controlled drive mode(front drive and rear drive)and rapid climb speed(4.76 cm/min)at wide slope *** architecture design,they can be series-wound or shunt-wound to construct multijoint complex *** climbing,a intelligent soft ring-pull with admirable cycle performance for preventing overheating or something untouchable,has been *** soft crawlers also realize multiple energy conversion to be actuated by light *** envision that this soft crawler system has an enormous potential in intelligent machine,microscopic diagnosis and treatment,biosensing,energy harvesting and conversion.

关键词： Soft crawler Tumbler locomotion Reversible shape-morphing Autonomous Energy conversion

Comparison of microendoscopic discectomy and open discectomy for single-segment lumbar disc herniation

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World Journal of Clinical Cases 2020年第14期8卷 2942-2949页

作者： Jiu-Ya Pang Fei Tan Wei-Wei Chen cui-hua li Shu-Ping Dou Jing-Ran Guo li-Ying Zhao Department of Traumatology The Second Hospital of TangshanTangshan 0630000Hebei ProvinceChina Intensive Care Unit The Second Hospital of TangshanTangshan 0630000Hebei ProvinceChina Department of Nursing The Second Hospital of TangshanTangshan 0630000Hebei ProvinceChina Department of Hand Surgery The Second Hospital of TangshanTangshan 0630000Hebei ProvinceChina Department of Spinal Surgery The Second Hospital of TangshanTangshan 0630000Hebei ProvinceChina Hospital Office The Second Hospital of TangshanTangshan 0630000Hebei ProvinceChina

BACKGROUND Lumbar disc herniation is a common *** treatment may have more advantages than traditional *** To compare the clinical efficacy and safety of microendoscopic discectomy(MED)and open discectomy with lamina nucleus enucleation in the treatment of singlesegment lumbar intervertebral disc *** Ninety-six patients who were operated at our hospital were selected for this *** with single-segment lumbar disc herniation were admitted to the hospital from March 2018 to March 2019 and were randomly divided into the observation group and the control group with 48 cases in each *** former group underwent lumbar discectomy and the latter underwent laparotomy and nucleus *** effects were compared between the two *** In terms of surgical indicators,the observation group had a longer operation time,shorter postoperative bedtime and hospital stay,less intraoperative blood loss,and smaller incision length than the control group(Plications was significantly lower in the observation group than in the control group(6.25%vs 22.92%,Plications.

关键词： Lumbar intervertebral discectomy open discectomy with fenestrated windows Single-segment lumbar disc herniation Nerve root Nucleus pulposus Pain

Three new bioactive flavonoid glycosides from Viscum album

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Chinese Journal of Natural Medicines 2019年第7期17卷 545-550页

作者： DAI Jia-Kun CAO Duo li cui-hua GAO Jing li Meng-Qing FAN Na WEI Ya-Hui SUN Zheng-liang HOU Meng-Yang The College of life Science Northwest University Xi 'an 710069 China State Key Laboratory of New Drug and Pharmaceutical Process Shanghai Institute of Pharmaceutical Industry China State Institute of Pharmaceutical Industry Shanghai 201203 China The College of life Science Yan 'an University Yan 'an 710000 China Shanghai University of Medicine & Health Sciences Affiliated Sixth People s Hospital South Campus Shanghai 201499 China Bio-Agriculture Institute of Shaanxi Xi 'an 710043 China School of life Science and Biotechnology Dalian University of Technology Dalian 116024 China College of Healthy Management Shangluo University Shangluo 726000 China

Two new flavonoid glycosides, named viscumneoside XⅡ(1), and viscumneoside XⅢ(2);a new dihydrogen flavonoid glycoside product named viscumneoside XⅣ(3), were isolated from the aerial part of Viscum album, along with seven known compounds(4-10). Their structures were identified by analysis of spectroscopic data. In addition, cytotoxicity assay showed that 1, 2 and 3 possessed significant inhibitory activities against C6, A549 and MDA-MB-231(the inhibition rate arrived about 50%, 70% and74% respectively with IC50 ≤ 60.00 μmol·L^-1), while the inhibition of TF-1 and Hela was not significant.

关键词： Viscum album Flavonoid glycosides Cytotoxic activities