Progress in the research on aquatic environmental nonpoint source pollution in China

ＰｒｏｇｒｅｓｉｎｔｈｅｒｅｓｅａｒｃｈｏｎａｑｕａｔｉｃｅｎｖｉｒｏｎｍｅｎｔａｌｎｏｎｐｏｉｎｔｓｏｕｒｃｅｐｏｌｕｔｉｏｎｉｎＣｈｉｎａＢａｏＱｕａｎｓｈｅｎｇ，ＭａｏＸｉａｎｑｉａｎｇ，ＷａｎｇＨｕａｄｏｎｇＩｎｓｔｉｔｕｔｅｏｆＥｎｖｉｒｏ...     

Effects of low pH on zooplankton in some suburban waterbodies of Chongqing City

ＥｆｆｅｃｔｓｏｆｌｏｗｐＨｏｎｚｏｏｐｌａｎｋｔｏｎｉｎｓｏｍｅｓｕｂｕｒｂａｎｗａｔｅｒｂｏｄｉｅｓｏｆＣｈｏｎｇｑｉｎｇＣｉｔｙＺｈｕａｎｇＤｅｈｕｉ（ＩｎｓｔｉｔｕｔｅｏｆＨｙｄｒｏｂｉｏｌｏｇｙ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃ...     

Climatic change and urbanization effect in China

Climatic change and urbanization effect in China during the last 39 years were investigated. It is found that a warming of about 0.23℃ for the annual temperature has been noticed from 1951 to 1989. The warmings of about 0.78 ℃ in winter and 0.34 3℃ in spring have been shown. It is also presented that a cooling of about -0.27℃ in summer has been indicated. The bigger cities are warmer than smaller cities in China. The dried trends in the annual precipitation during the last 39 years were presented. The precipitation decreased obviously in summer all over China. The bigger cities were drier than smaller cities.     

Study on nitrile-degrading microorganisms

Two strains of bacteria were isolated from nitrile polluted soils, and identified as Corynebacterium boffmanii and Arthrobacter flavescens. Acetonitrile, propionitrile, butyronitrile and acrylonitrile were degraded by these bacteria to yield corresponding amides, carboxylic acids and ammonia. The nitrile-degrading abilities of these strains were investigated. The removal rates for the nitrile were nearly 100%, after these bacteria were grown in medium containing 10000 ppm of aceto-, propio-, or butyronitrile at 28 ℃ for 24h. When the reaction mkture consisting of 5000 ppm of above mentioned nitriles or acrylonitrile and 20g (dry cell) /L resting cells of the two strains in 0.06mol/L phosphate buffer (pH7.5) was incubated separately at 25 ℃ with moderate shaking for 15 or 45 min, the nitrile could be degraded completely. The optimum growth conditions for C.hoffmanii and A.flavescens were studied as well.     

湛江:创新思路力促减排出实效

近年来,湛江市的环境保护工作取得了卓越的成就,根据城市综合整治定量考核结果显示,"十五"以来湛江市的环境质量一直居于全国47个环保重点城市的前列.     

冷却技术的革命——冷却塔节能减排的理想方法

工业生产或制冷工艺过程中产生的废热．一般要用冷却水来导走。冷却塔的作用是将挟带废热的冷却水在塔内与空气进行热交换．使废热传输给空气并散人大气中。     

国资委确定中央企业节能减排目标

中央企业节能减排工作目标日前确定：到“十一五”期末，中央企业要确保完成单位增加值能耗降低20％，主要污染物排放总量减少10％，石油石化、冶金、电力、交通运输、化工、煤炭、建材等重点行业，要力争到2009年末，提前完成上述目标。     

Removal of heavy metals (Cr6+,Ni2+)from polluted water using decaying leaves of plane (Plantanus orientalis)

plane decaying leaves have been found capable of removing chromium and nickel ions from aqueous solutions. The removal efficiency depends upon the pH conditions, ions components and concentrations, and concentrations of leaves in media. The maximum removal for unique Cr⁶⁺ is about 7.5-8.0g/kg leaves at pH 4. 0, for unique Ni²⁺ about 2. 6g/kg at the region of PH5. 0-5.5. Under the described conditions nickel increases chromium uptake by plane decaying leaves from solution.     

Purification and reclamation of wastewater by an integrated biological pond system

ＰｕｒｉｆｉｃａｔｉｏｎａｎｄｒｅｃｌａｍａｔｉｏｎｏｆｗａｓｔｅｗａｔｅｒｂｙａｎｉｎｔｅｇｒａｔｅｄｂｉｏｌｏｇｉｃａｌｐｏｎｄｓｙｓｔｅｍＷｕＺｈｅｎｂｉｎ；ＸｉａＹｉｃｈｅｎｇ；ＺｈａｎｇＹｏｎｇｙｕａｎ；ＤｅｎｇＪｉａｑｉ；ＣｈｅｎＸｉｔａ...     

The research of below-cloud scavengingof rainwater in Guilin City

Ｔｈｅｒｅｓｅａｒｃｈｏｆｂｅｌｏｗ－ｃｌｏｕｄｓｃａｖｅｎｇｉｎｇｏｆｒａｉｎｗａｔｅｒｉｎＧｕｉｌｉｎＣｉｔｙＢａｉＹｕｈｕａ；ＹａｏＲｏｎｇｋｕｉ；ＬｉＸｉｎ；ＴａｎｇＸｉａｏｙａｎ（ＴｈｅＤｅｐａｒｔｍｅｎｔｏｆＴｅｃｈｎｉｃａｌＰｈｙｓｉｅ...