β-Cyclodextrin and its derivatives-enhanced solubility and biodegradation of 2-nitrobiphenyl

This paper investigated the effects of β-cyclodextrins （I3-CD） and its two derivatives, hydroxypropyl-β-cyclodextrin （HPCD） and carboxymethyl-β-cyclodextrin （CMCD）, on the solubility and biodegradation of 2-nitrophenyl by an A cinetbacter sp. Results showed that β-CD, HPCD and CMCD could not be utilized by A cinetbacter sp. as sole carbon source and none of the CDs had toxic effects on the growth of the bacteria in the experiments; all the CDs could enhance the apparent solubility and accelerate the biodegradation of 2-nitrobipheny. It showed that biodegradation-accelerating effects of CDs on 2-nitrobiphenyl were correlated with their solubility-enhancing effects. Among three CDs investigated, CMCD had the most obvious effects both on the apparent solubility and the biodegradation, followed by β-CD and HPCD.     

Fouling and cleaning of membrane--a literature review

1　ＩｎｔｒｏｄｕｃｔｉｏｎＤｕｒｉｎｇｔｈｅｐａｓｔｆｅｗｙｅａｒｓ,ｍｅｍｂｒａｎｅｓｅｐａｒａｔｉｏｎｓｈａｖｅｂｅｃｏｍｅｍｏｒｅｗｉｄｅｌｙｕｓｅｄ,ａｎｄｒｅｐｌａｃｅｄｓｏｍｅｏｆｔｈｅｃｏｎｖｅｎｔｉｏｎａｌｃｏｎｃｅｎｔｒａｔｉｏｎｔ?..     

Preparation and characterization of Fe2O3-CeO2-TiO2/γ-Al2O3 catalyst for degradation dye wastewater

In order to develop a catalyst with high activity for catalytic wet oxidation （CWO） process at room temperature and atmospheric pressure, Fe2O3-CeO2-TiO2/γ-Al2O3 catalyst was prepared by consecutive impregnation method and the prepared parameters were optimized. The structure of the catalyst was characterized by BET, XRF, SEM and XPS technologies, and the actual wastewater was used to investigate the catalytic activity of Fe2O3-CeO2-TiO2/γ-Al2O3 in CWO process. The experimental results showed that the prepared catalyst exhibited good catalytic activity when the doping amount of Ti was 1.0 wt% （the weight ratio of Ti to carriers）, and the middle product, Fe2O3-CeO2-TiO2/γ-Al2O3, was calcined in 450℃ for 2 h. The CWO experiment for treating actual dye wastewater indicated that the COD, color and TOC of actual wastewater were decreased by 62.23%, 50.12% and 41.26% in 3 h, respectively, and the ratio of BOD5/COD was increased from 0.19 to 0.30.     

Conceptual understandings of the ecological engineering issues: in China and abroad

ＩｎｔｒｏｄｕｃｔｉｏｎＡｓａｎｅｗｂｒａｎｃｈｏｆｅｃｏｌｏｇｙａｎｄａｎｉｎｔｅｒｄｉｓｃｉｐｌｉｎａｒｙｆｉｅｌｄ,ｔｈｅｅｃｏｌｏｇｉｃａｌｅｎｇｉｎｅｅｒｉｎｇｗａｓｉｎｉｔｉａｌｌｙｆｏｒｍｕｌａｔｅｄｉｎｔｈｅｅａｒｌｙ1960ｓ.Ｄｕｒｉｎ...     

Bioaugmentation: a new strategy for removal of recalcitrant compounds in wastewater—a case study of quinoline

ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｒｅｃｅｎｔｙｅａｒｓｘｅｎｏｂｉｏｔｉｃｓｈａｖｅｃａｕｇｈｔｗｏｒｌｄｓａｔｔｅｎｔｉｏｎｂｅｃａｕｓｅｔｈｅｙａｒｅｐｏｏｒｌｙｂｉｏｄｅｇｒａｄａｂｌｅａｎｄｔｈｒｅａｔｅｎｐｕｂｌｉｃｈｅａｌｔｈｉｆｈａｎｄｌｅ...     

Treatment of manganese wastewater from titanium dioxide plant using complex phosphate

ＩｎｔｒｏｄｕｃｔｉｏｎＵｓｉｎｇｃｏｍｐｌｅｘｐｈｏｓｐｈａｔｅｔｏｔｒｅａｔｍａｎｇａｎｅｓｅｗａｓｔｅｗａｔｅｒｆｒｏｍｔｉｔａｎｉｕｍｄｉｏｘｉｄｅｐｌａｎｔｗａｓｐｒｅｓｅｎｔｅｄｉｎｔｈｉｓｐａｐｅｒ.Ｃｏｍｐａｒｉｎｇｗｉｔｈｏｔｈｅｒ?..     

Furfural residues from straw become complex fertilizer by addition method

ＩｎｔｒｏｄｕｃｔｉｏｎＦｕｒｆｕｒａｌｉｓａｋｉｎｄｏｆｉｍｐｏｒｔａｎｔｒａｗｍａｔｅｒｉａｌｉｎｃｈｅｍｉｃａｌｉｎｄｕｓｔｒｙ.Ｗｉｔｈｔｈｅｇｒｏｗｔｈｏｆｉｔｓｕｓｅ,ｉｔｓｐｒｏｄｕｃｔｉｏｎｉｓｉｎｃｒｅａｓｉｎｇａｎｎｕａｌｌｙ.Ｂｕ?..     

A novel kinetic procedure for the determination of iron in environmental samples

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｄｅｔｅｒｍｉｎａｔｉｏｎｏｆｉｒｏｎｒｅｃｅｉｖｅｄｅｘｔｅｎｓｉｖｅａｔｔｅｎｔｉｏｎｂｅｃａｕｓｅｏｆｉｔｓｉｎｃｒｅａｓｉｎｇｉｍｐｏｒｔａｎｃｅｉｎｂｉｏｃｈｅｍｉｃａｌａｎｄｅｎｖｉｒｏｎｍｅｎｔａｌｓｔｕｄ...     

Levels of toxic metal in Achatina achatina from parts of Akwa Ibom State, Nigeria

ＩｎｔｒｏｄｕｃｔｉｏｎＳｎａｉｌｓａｒｅｔｙｐｉｃａｌｕｎｉｖａｌｖｅｓｔｈａｔｂｅｌｏｎｇｔｏｔｈｅｐｈｙｌｕｍｍｏｌｌｕｓｃａ.Ｔｈｅｙａｒｅｅｉｔｈｅｒａｑｕａｔｉｃｏｒｔｅｒｒｅｓｔｒｉａｌａｎｄｔｈｅｃｏｍｍｏｎｔｅｒｒｅｓｔｒｉａｌｓｐ?..     

On the study of ecosystem health:state of the art

ＩｎｔｒｏｄｕｃｔｉｏｎＤｕｒｉｎｇｌａｓｔｄｅｃａｄｅｓ,ｔｈｅｔｅｒｍ“ｅｃｏｓｙｓｔｅｍｈｅａｌｔｈ”ｉｓｕｓｅｄｗｉｔｈｉｎｃｒｅａｓｉｎｇｆｒｅｑｕｅｎｃｙｉｎｔｈｅｌｉｔｅｒａｔｕｒｅ.Ｔｈｅｇｒｏｗｉｎｇｉｎｔｅｒｅｓｔｓｉｎｔｈｅｓｔｕ...     

Urban environmental problems transition and environmental education towards sustainable cities in China

1　ＵｒｂａｎｉｚａｔｉｏｎａｎｄｔｒａｎｓｉｔｉｏｎｏｆｕｒｂａｎｅｎｖｉｒｏｎｍｅｎｔａｌｐｒｏｂｌｅｍｓＩｔｉｓｗｅｌｌｋｎｏｗｎｔｈａｔＣｈｉｎａｉｓｎｏｗｅｘｐｅｒｉｅｎｃｉｎｇｒａｐｉｄｕｒｂａｎｉｚａｔｉｏｎａｎｄｉｎｄｕｓｔｒｉａｌｉ?..     

Assessment of traffic related air pollution in urban areas of Macao

1　ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｒｅｃｅｎｔｙｅａｒｓ,ｍｏｒｅａｎｄｍｏｒｅｃｉｔｉｅｓｈａｖｅｓｕｆｆｅｒｅｄｆｒｏｍａｉｒｐｏｌｌｕｔｉｏｎｃａｕｓｅｄｂｙｖｅｈｉｃｌｅｄｉｓｃｈａｒｇｅ.Ｍａｎｙｏｆｔｈｅｐｏｌｌｕｔａｎｔｓｆｒｏｍｖｅｈｉｃ?..     

复合催化剂CuO-MnO_2-CeO_2/13X制备及其对萘的催化性能

采用浸渍法制备出复合过渡金属氧化物催化剂Cu O-Mn O2-Ce O2/13X,并用氮吸附、SEM、XRD、TGA对其结构、组成及热稳定性进行了表征,同时在固定催化床中研究了Cu O-Mn O2-Ce O2/13X催化剂对萘的催化性能。BET分析表明6%Cu O-Mn O2-2%Ce O2/13X催化剂的比表面积达到了476 m2/g,平均孔径达到2.314 nm,SEM和XRD结果表明一定负载率下Cu O、Mn O2、Ce O2在13X表面呈高度分散状态,有利于催化剂的催化活性提高。催化降解实验结果表明助催化剂Ce O2的适量添加可以明显提高催化剂的性能,当催化剂的负载率为6%Cu O-Mn O2-2%Ce O2时其对萘的催化率达到了65%。     

Mixed surfactant washing of petroleum contaminants from the soils and sediments in the unsaturated zone

ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｒｅｃｅｎｔｙｅａｒｓ,ｒｅｍｅｄｉａｔｉｏｎｏｆｐｅｔｒｏｌｅｕｍｃｏｎｔａｍｉｎａｔｅｄｇｒｏｕｎｄｗａｔｅｒａｎｄｓｏｉｌｈａｓａｔｔｒａｃｔｅｄｍｕｃｈａｔｔｅｎｔｉｏｎｏｆｓｃｉｅｎｔｉｓｔｓｉｎｖａｒｉｏｕｓｃ?..     

Petro-chemical wastewater treatment by biological process

Ｉｎｔｈｅｃｏｕｒｓｅｏｆｏｉｌｒｅｆｉｎｉｎｇ,ｏｒｇａｎｉｃｗａｓｔｅｗａｔｅｒｗｉｔｈｈｉｇｈｃｏｎｃｅｎｔｒａｔｉｏｎｏｆｅｍｕｌｓｉｆｉｅｄｏｉｌａｎｄｐｈｅｎｏｌｉｓｐｒｏｄｕｃｅｄ,ｓｏｆａｒ,ｔｈｅｍｅｔｈｏｄｓｏｆｐｈｙｓｉｃｏｃｈｅ?..     

Human impacts on the terrestrial ecosystem of Fildes Peninsula of King George Island, Antarctica

Ｓｉｎｃｅｔｈｅｉｎｔｅｒｎａｔｉｏｎａｌｇｅｏｐｈｙｓｉｃａｌｙｅａｒ(ＩＧＹ,1957—1958),Ａｎｔａｒｃｔｉｃａｈａｓｂｅｅｎｔｈｅｏｂｊｅｃｔｏｆｉｎｔｅｎｓｉｖｅｓｃｉｅｎｔｉｆｉｃｉｎｖｅｓｔｉｇａｔｉｏｎｂｙｔｅａｍｓｏｆｓｃｉｅｎｔｉｓｔｓ...     

Life cycle assessment for municipal solid waste treatment and utilization

ＩｎｔｒｏｄｕｃｔｉｏｎＷｉｔｈｍｕｎｉｃｉｐａｌｅｘｐａｎｓｉｏｎ,ｅｃｏｎｏｍｉｃｄｅｖｅｌｏｐｍｅｎｔａｎｄｉｍｐｒｏｖｅｍｅｎｔｏｆｐｅｏｐｌｅ’ｓｌｉｖｉｎｇｓｔａｎｄａｒｄｓ,ｔｈｅａｍｏｕｎｔｏｆｍｕｎｉｃｉｐａｌｓｏｌｉｄｗａｓｔｅ(Ｍ?..     

Suspended particulate and colloidal matter in natural waters

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｒｅｉｓｃｏｎｓｉｄｅｒａｂｌｅｅｖｉｄｅｎｃｅｔｈａｔｐａｒｔｉｔｉｏｎｂｅｔｗｅｅｎｓｏｌｉｄａｎｄａｑｕｅｏｕｓｐｈａｓｅｈａｓａｍａｊｏｒｅｆｆｅｃｔｏｎｔｈｅｏｃｃｕｒｒｅｎｃｅ,ｔｒａｎｓｐｏｒｔ,ｆａｔｅａｎ...     

Catalyst assisted destruction of trichloro ethylene and toluene in corona discharges

ＩｎｔｒｏｄｕｃｔｉｏｎＴｒｉｃｈｌｏｒｏｅｔｈｙｌｅｎｅｉｓａｖｅｒｙｅｆｆｅｃｔｉｖｅｓｏｌｖｅｎｔｔｏｒｅｍｏｖｅｏｉｌｆｒｏｍｓｉｌｉｃｏｎａｎｄｏｔｈｅｒｍａｔｅｒｉａｌｓｕｓｅｄｉｎｓｅｍｉｃｏｎｄｕｃｔｏｒｉｎｄｕｓｔｒｙ.ＴｈｅＣ2ＨＣ...     

UV/H2O2/草酸铁络合物光降解水中氯仿的研究

以４００Ｗ高压汞灯为紫外光源，Ｈ２Ｏ２－草酸铁络合物为光氧化剂，对氯仿水溶液进行了光降解反应实验研究．结果表明，ＵＶ／Ｈ２Ｏ２草酸铁络合物体系能有效地使水溶液中氧仿迅速光解脱氯；在等摩尔系列溶液中,Ｆｅ３＋／草酸根的摩尔比为１：３时，氯仿光解效果最好：溶液ｐＨ值对氯仿光解有显著影响，ｐＨ值在３－４时光解速率最快；随着Ｈ２ｏ２浓度的增加，氯仿大解速率提高，但Ｈ２Ｏ２浓度较大时，Ｈ２Ｏ２的有效利用率降低；温度对氯仿光解反应有一定影响，反应的表观活化能为７．６ｋＪ／ｍｏｌ.