Cu2+ adsorption from simulated aqueous solution was investigated using a modified spent shiitake substrate (MSSS). The results showed that the MSSS has a high adsorption efficiency and removal performance. The Cu2+rem...Cu2+ adsorption from simulated aqueous solution was investigated using a modified spent shiitake substrate (MSSS). The results showed that the MSSS has a high adsorption efficiency and removal performance. The Cu2+removal rate of the MSSS reached above 95%. Compared with spent shiitake substrate (SSS), the specific surface area, electronegativity and surface functional groups of the MSSS were all improved, resulting in a high adsorption capacity. The Cu2+ adsorption of MSSS reached equilibrium after 0.75 h and was an exothermic reaction. The SEM and EDS analyses of the MSSS before and after Cu2+ adsorption showed that the pores on the surface of the MSSS were occupied after adsorption and the Cu content increased but the Na content decreased.展开更多
[Objective] The aim of this study was to explore the effects of substrates before and after fermenting treatment on the growth,development and cut flower quality of lily.[Method] Oriental lily cultivar ＇Siberia＇ was...[Objective] The aim of this study was to explore the effects of substrates before and after fermenting treatment on the growth,development and cut flower quality of lily.[Method] Oriental lily cultivar ＇Siberia＇ was taken as material to study the effect of using fermentative and unfermented agricultural waste as substrates on the growth,development and cut flower quality of lily.And the physical and chemical properties of substrates before and after fermenting treatment were studied.[Result] The full decomposition of agricultural waste would greatly improve the physical and chemical properties of substrates,such as the fermentative substrates changed to stabilization,the ratio of carbon nitrogen had dropped drastically,the total porosity was increase,the ratio of gas and water was better,and the nutrition elements was increased.Moreover,it could significantly increased the plant height,stem diameter,leaf number,leaf area,leaf fresh weight and so on,as well as expanded the lily roots and significantly improved the rate of cut flower and cut flower quality.[Conclusion] This study had provided theoretically basis for the cultivation of cut lily.展开更多
Based on the theory of substrate permeation through the cytoplasmic membrane,and considering the effect of initial concentration of substrate,a new kinetic model of phenol degradation process was proposed,Comparing wi...Based on the theory of substrate permeation through the cytoplasmic membrane,and considering the effect of initial concentration of substrate,a new kinetic model of phenol degradation process was proposed,Comparing with the widely used Haldane model,which is greatly dependent on the initial phenol concentration,our model can be used to simulate the phenol degradation process in a wide range of initial phenol concentration by using only one set of model parameters ,Therefore,this new kinetic model has much more potential applications to industrial design and operation.展开更多
Five different substrates were prepared using oyster mushroom residue,rice straw,peat soil,pine bark,volcanic rock and perlite.Orchids(variety Chunjian)were cultivated on these five substrates with substrate being mad...Five different substrates were prepared using oyster mushroom residue,rice straw,peat soil,pine bark,volcanic rock and perlite.Orchids(variety Chunjian)were cultivated on these five substrates with substrate being made from aseptic residue and straw as the control.The changes of physical and chemical properties of substrates and the growth of orchids were observed after three months.The results showed that the physical and chemical characters of the treatments and the control each had its own advantage,and there were no significant differences in the cultivation effects of all treatments.Therefore,the mushroom residue and decomposed rice straw are good substitutes for peat soil as soilless culture substrate in orchid cultivation.This research provides a scientific basis for the transformation of agricultural wastes into useful materials and can greatly stimulate the development of related industries.展开更多
The composition of ashes stemming from the burning of medical waste is similar to that of urban waste. Specific pieces of evidence are looked for that allowed distinguishing some components in those waste products. A ...The composition of ashes stemming from the burning of medical waste is similar to that of urban waste. Specific pieces of evidence are looked for that allowed distinguishing some components in those waste products. A selection is carried out and some elements are included in a glass matrix. An unexpected result is presented here. It is possible to differentiate sterile and non-sterile medical gloves. The main difference is the relative amounts of calcium, in glass forming. Glasses are manufactured with a mono-ammonium phosphate since it is a natural product in Morocco. Several compositions are tried and studied. These compositions are expressed in usual two ternary and one quaternary systems built with the four equivalent components： SiO2, A1203, P205 and CaO and then compared to a patented composition.展开更多
Waste cellulosic biomass obtains various applications due to low-cost and eco-benign characteristics.A general strategy is proposed for waste cellulosic biomass to be modified with dialdehyde functional groups as inte...Waste cellulosic biomass obtains various applications due to low-cost and eco-benign characteristics.A general strategy is proposed for waste cellulosic biomass to be modified with dialdehyde functional groups as intermediates through periodate partial oxidation.Finally,aminothiourea-modified waste cellulosic biomass can be prepared through Schiff reaction.Waste corn stalk,cotton and paper as typical precursors,were used to prepare cellulosic biomass,abbreviated as AT-S,AT-C and AT-P,respectively,and their adsorption behaviors of Au(III)from the hydrochloric acid medium were investigated.The pseudo-second kinetics equation as well as the Langmuir isotherm equation can be used to depict the adsorption process,and the maximum adsorption capacities of Au(III)are21.4,19.0and3.28mol/kg for AT-S,AT-C and AT-P at298K,respectively.The adsorption capacities of Au(III)on aminothiourea modified corn stalk(AT-S)is almost357times greater than that of raw corn stalk.To the best of our knowledge,AT-S has the highest adsorption capacity towards Au(III).AT-S also displays a superior separation selectivity towards Au(III)in the presence of Cu(II),Ni(II),Co(II),Pt(VI),Pd(II)and Rh(III).Furthermore,the characterization analysis of XRD,TG,SEM,TEM and FTIR confirms that AuCl4– has been reduced to elemental Au nanoparticles and deposit onto the surface of the biomass.It shows a prospect for waste corn stalk to be used to adsorb Au(III)from liquid phase and the possible fabrication of gold nanoparticles by a general adsorption process without any reductant.展开更多
One of the big problems of the urban centres of the cities in Brazil is the growth of the generation of the Civil Construction Waste （CCW）. A disturbing concern for the public and private sectors is to find proper d...One of the big problems of the urban centres of the cities in Brazil is the growth of the generation of the Civil Construction Waste （CCW）. A disturbing concern for the public and private sectors is to find proper disposal of Urban Solid Waste （USW） in large cities, since suitable dumping sites for this waste are increasingly scarce due to the spread and development of large urban centres. In general, recycling is currently one of the procedures most studied by researchers for disposal of such waste. In this context and aiming a new application for recycled CCW aggregates, the research characterized the physical properties of the material to use in fill compaction piles in soil improvement. The analysis shows results from laboratorial tests executed in CCW recycled samples, which came from works in different construction stages from Recife-PE, and natural aggregate, adopted as a reference. Characterization tests were performed with samples CCW recycled CLue aggregates and samples of natural fine aggregate （stone powder）. The results of characterization tests showed similarities between the CCW samples tested and the reference samples, indicating that the civil construction wastes has potcntial use as material for consolidation piles in foundation works.展开更多
基金Project(51204011)supported by the National Natural Science Foundation of ChinaProject(20121000803)supported by the Foundation of the Advisor of Beijing Excellent Doctoral Dissertation of ChinaProject(2013T60063)supported by the China Postdoctoral Science Foundation
文摘Cu2+ adsorption from simulated aqueous solution was investigated using a modified spent shiitake substrate (MSSS). The results showed that the MSSS has a high adsorption efficiency and removal performance. The Cu2+removal rate of the MSSS reached above 95%. Compared with spent shiitake substrate (SSS), the specific surface area, electronegativity and surface functional groups of the MSSS were all improved, resulting in a high adsorption capacity. The Cu2+ adsorption of MSSS reached equilibrium after 0.75 h and was an exothermic reaction. The SEM and EDS analyses of the MSSS before and after Cu2+ adsorption showed that the pores on the surface of the MSSS were occupied after adsorption and the Cu content increased but the Na content decreased.
基金Supported by "12th Five-Year" National Science and Technology Suppot Project(2011BAD12B02)Beijing Finance Bureau Support Project~~
文摘[Objective] The aim of this study was to explore the effects of substrates before and after fermenting treatment on the growth,development and cut flower quality of lily.[Method] Oriental lily cultivar ＇Siberia＇ was taken as material to study the effect of using fermentative and unfermented agricultural waste as substrates on the growth,development and cut flower quality of lily.And the physical and chemical properties of substrates before and after fermenting treatment were studied.[Result] The full decomposition of agricultural waste would greatly improve the physical and chemical properties of substrates,such as the fermentative substrates changed to stabilization,the ratio of carbon nitrogen had dropped drastically,the total porosity was increase,the ratio of gas and water was better,and the nutrition elements was increased.Moreover,it could significantly increased the plant height,stem diameter,leaf number,leaf area,leaf fresh weight and so on,as well as expanded the lily roots and significantly improved the rate of cut flower and cut flower quality.[Conclusion] This study had provided theoretically basis for the cultivation of cut lily.
基金Supported by China Petroleum & Chemical Corporation (X599011).
文摘Based on the theory of substrate permeation through the cytoplasmic membrane,and considering the effect of initial concentration of substrate,a new kinetic model of phenol degradation process was proposed,Comparing with the widely used Haldane model,which is greatly dependent on the initial phenol concentration,our model can be used to simulate the phenol degradation process in a wide range of initial phenol concentration by using only one set of model parameters ,Therefore,this new kinetic model has much more potential applications to industrial design and operation.
基金Supported by Innovation Alliance Project of Agricultural Science and Technology Innovation Fund of Hunan Province(2017LM0301)Science and Technology Innovation Project in Hunan Academy of Agricultural Sciences(2017JC55)Key Research&Development Project of Hunan(2016NK2180)~~
文摘Five different substrates were prepared using oyster mushroom residue,rice straw,peat soil,pine bark,volcanic rock and perlite.Orchids(variety Chunjian)were cultivated on these five substrates with substrate being made from aseptic residue and straw as the control.The changes of physical and chemical properties of substrates and the growth of orchids were observed after three months.The results showed that the physical and chemical characters of the treatments and the control each had its own advantage,and there were no significant differences in the cultivation effects of all treatments.Therefore,the mushroom residue and decomposed rice straw are good substitutes for peat soil as soilless culture substrate in orchid cultivation.This research provides a scientific basis for the transformation of agricultural wastes into useful materials and can greatly stimulate the development of related industries.
文摘The composition of ashes stemming from the burning of medical waste is similar to that of urban waste. Specific pieces of evidence are looked for that allowed distinguishing some components in those waste products. A selection is carried out and some elements are included in a glass matrix. An unexpected result is presented here. It is possible to differentiate sterile and non-sterile medical gloves. The main difference is the relative amounts of calcium, in glass forming. Glasses are manufactured with a mono-ammonium phosphate since it is a natural product in Morocco. Several compositions are tried and studied. These compositions are expressed in usual two ternary and one quaternary systems built with the four equivalent components： SiO2, A1203, P205 and CaO and then compared to a patented composition.
基金Projects(51504073,51404081,51672275)supported by the National Natural Science Foundation of ChinaProject(2012CBA01202)supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology,China+1 种基金Project(QianJiaoKeHe KY[2015]433)supported by the Research Program of the Education Department of Guizhou Province,ChinaProject(XJG20141104)supported by the Research Program of Talented Scholars of Guizhou Institute of Technology,China
文摘Waste cellulosic biomass obtains various applications due to low-cost and eco-benign characteristics.A general strategy is proposed for waste cellulosic biomass to be modified with dialdehyde functional groups as intermediates through periodate partial oxidation.Finally,aminothiourea-modified waste cellulosic biomass can be prepared through Schiff reaction.Waste corn stalk,cotton and paper as typical precursors,were used to prepare cellulosic biomass,abbreviated as AT-S,AT-C and AT-P,respectively,and their adsorption behaviors of Au(III)from the hydrochloric acid medium were investigated.The pseudo-second kinetics equation as well as the Langmuir isotherm equation can be used to depict the adsorption process,and the maximum adsorption capacities of Au(III)are21.4,19.0and3.28mol/kg for AT-S,AT-C and AT-P at298K,respectively.The adsorption capacities of Au(III)on aminothiourea modified corn stalk(AT-S)is almost357times greater than that of raw corn stalk.To the best of our knowledge,AT-S has the highest adsorption capacity towards Au(III).AT-S also displays a superior separation selectivity towards Au(III)in the presence of Cu(II),Ni(II),Co(II),Pt(VI),Pd(II)and Rh(III).Furthermore,the characterization analysis of XRD,TG,SEM,TEM and FTIR confirms that AuCl4– has been reduced to elemental Au nanoparticles and deposit onto the surface of the biomass.It shows a prospect for waste corn stalk to be used to adsorb Au(III)from liquid phase and the possible fabrication of gold nanoparticles by a general adsorption process without any reductant.
文摘One of the big problems of the urban centres of the cities in Brazil is the growth of the generation of the Civil Construction Waste （CCW）. A disturbing concern for the public and private sectors is to find proper disposal of Urban Solid Waste （USW） in large cities, since suitable dumping sites for this waste are increasingly scarce due to the spread and development of large urban centres. In general, recycling is currently one of the procedures most studied by researchers for disposal of such waste. In this context and aiming a new application for recycled CCW aggregates, the research characterized the physical properties of the material to use in fill compaction piles in soil improvement. The analysis shows results from laboratorial tests executed in CCW recycled samples, which came from works in different construction stages from Recife-PE, and natural aggregate, adopted as a reference. Characterization tests were performed with samples CCW recycled CLue aggregates and samples of natural fine aggregate （stone powder）. The results of characterization tests showed similarities between the CCW samples tested and the reference samples, indicating that the civil construction wastes has potcntial use as material for consolidation piles in foundation works.
