被引排行
Research and Application Progress in Cellulase
ZHAO Xin;ZHANG Hong;MEN Zhonghua;MA Yong;WEN Tong;Cellulose is mainly degraded by cellulase with different functions into oligosaccharides or monosaccharides, which provides carbon source and energy for herbivorous animals and some microorganisms, and plays an important role in the natural carbon cycle.In this paper, on the basis of the introduction of cellulose and cellulase, we review the research progress of cellulase and its applications in textile, paper making, feed, food, and energy industries.
The Research Progress in Biological Activity of Mannopeptin
SONG Gang,GAN Xin(School of Biotechnology,Hubei University of Technology,Wuhan 430068,China)The structure and characteristics of mannopeptin were introduced.The extraction method and biological activity were stated.The research and development progress of mannopeptin were discussed also.
E-Fenton Techniaue Treatment of Phenol-Wastewater
ZHOU Shan, DENG Dai-ju (Department of Chemistry and Environmental Engineering, Hubei Normal University, Huangshi 435000, China)In this paper the treatment of phenol wastewater with E-Fenton reagent was studied. The elec-trobath was made up of iron-anode and ACF-cathode, meanwhile the air blowed cathode. When electrifying, H2O2 and Fe2+ composed of E-Fenton reagent were produced. E-Fenton reagent having amount of active·OH degraded the phenol obviously. The optimum technology parameters were determined as follows: reaction temperature: room temperature, pH:3. 0-3. 5, reaction time 60 min, concentration of NaCl:10 g· L-1, current: 0. 1 A, voltage: 1 V. Under the optimum reaction conditions, the moved effciency of phenol was 92. 83%.
Research Progress in Biodiesel Preparation by Transesterification via Solid Acid Catalysts
YUAN Li,GAO Wen-yi,ZHANG Xiao-li,REN Li-guo(The School of Chemistry & Materials Science,Liaoning University of Petroleum and Chemical Technology,Fushun 113001,China)The most commonly used method for preparation of biodiesel is transesterification of vegetable oils and animal fats via homogeneous base or acid catalysts.A major hurdle in the commercialization of biodiesel from vegetable oil and animal fats,in comparison to petroleum-based diesel fuel,is its cost of manufacturing,primarily the raw material cost.In order to reduce production cost of biodiesel oil,inexpensive materials(such as used cooking oils and fats) can be used as raw materials,adaption of continuous transesterification process and recovery of high quality glycerol from biodiesel by-product(glycerol) are primary options to be considered.Homogenous acid catalysts have rather high oil conversion.However,the separation of waste catalysts brings about some environmental problems.More and more research has focused on heterogeneous acid catalysts.This review focuses on an introduction to research progress in preparation of biodiesel by transesterification via solid acid catalysts and developing prospect of biodiesel.Finally,some suggestions for further research of biodiesel are also provided.
Applications of Iron-Carbon Micro-Electrolysis Technology in Water Treatment
ZHANG Shuai;ZHAO Zhi-wei;PENG Wei;MAI Zheng-jun;Water purification mechanism and technical characteristics of iron-carbon micro-electrolysis technology are introduced.In addition,application status of iron-carbon micro-electrolysis technology are summarized in treatments of printing and dyeing wastewater,pharmaceutical wastewater,electroplating wastewater,coking wastewater,or drinking water.Finally,aiming at the problems of iron-carbon micro-electrolysis technology,the future researches toward improving iron-carbon packing,optimizing process,and combination with other process are put forward.
Development of Herbicidal-activitive Materials from Plants
MO Wen-yan, HE Hong-wu(Key Laboratory of Pesticide & Chemical Biology,Ministry of Education, College of Chemistry,Central China Normal University,Wuhan 430079,China)The progress of herbicidal-activitive materials from plants is reviewed in this article.Natural products with herbicidal-activity,botanical herbicides and their mechanisms are also described.
Environmental Hazardous of Hexachlorobenzene and Its Pollution Control
WU Rong-fang 1 , XIE Qing-jie 2 , HUANG Wei-hong 2 , LU Xiao-hua 2 (1.Construction Management Department,Jiangsu University, Zhenjiang 212013,China;2. School of Environmental Science & Engineering, Huazhong University of Science & Technology, Wuhan 430074,China)Hexachlorobenzene (HCB),one of the persistent organic pollutants (POPs), is refractory semi-volatile organic compound and non-biodegradable. Because of the bioaccumulation and persistence of HCB as well as its potential toxicity, HCB can lead to many serious illnesses, such as endocrinopathy, maladjustment of procreation and immunity, heteroplasia, cancer and so on.The main sources and hazardous of HCB in the environment are introduced, and the control technologies for HCB contaminated environment are also summarized in this paper.
Progress in Hydrothermal Carbonization of Waste Biomass and Application of Biochar in Wastewater Treatment
LIU Yitao;WEI Jia;LI Jun;Biomass carbonization,which mainly fixes biomass in the form of stable carbon through carbonization to form a new type of biochar products,is an emerging technology in biomass utilization.We briefly introduced the technology of biomass carbonization,and mainly introduced the research progress in biochar prepared by waste biomass with high moisture content,such as agricultural and forestry waste,food waste,livestock and poultry manure,and excess sludge through hydrothermal carbonization.Moreover,we discussed the application of hydrothermal biochar in the the treatment of wastewater containing organics,heavy metals,and anions.Finally,we forecast the prospect of hydrothermal carbonization of biomass.
Studies on Structures and Functions of the Cellulase from Bacteria
CHEN Yan-qin~(1), MAO Pei-hong~(2,3), ZENG Xian-xian~(2,3) (1.College of Chemical Engineering,Xinjiang Agricultural University,Urumqi 830052,China; 2. Ion Beam Bio-Engineering Center, Xinjiang University, Urumqi 830008,China; 3. Department of Physics, Xinjiang University, Urumqi 830046,China)This paper reviewed and discussed the recent advance in structure-function of cellulase from bacteria by structure biology and protein engineering, including cellulase compose, the structure-function of catalytic domains and cellulose-binding domains and linker, molecular folding, and the research prospects.
Research Progress of Pyrimidine Analogues
YUAN Dan,RONG Ru-bing,YU Zong-yuan (Hubei Research Institute of Chemistry,Wuhan 430074,China)Based on the data,pyrimidine analogues were classified as six species,including single substituted pyrimidine,double substituted pyrimidine,three substituted pyrimidine,four substituted pyrimidine,thiazolopyrimidine and pyridopyrimidine.Preparations and applications of pyrimidine analogues were also introduced in particular.