Metal pollution in relation to mass outbreaks of Dendrolimus punctatus Walker on Pinus massoniana Lamb.in China

Insects with their ecological superpower have enormous capacity to transform small pollution damage in forests to full scale calamities. Acid rain resulting from extensive coal burning is the chief pollutant in China. Acid rain activates from soil deposits toxic metals, which are transferred to trees and further to insects eating them. We studied the levels of the toxic Cd, its antagonists Zn and Cu, and acid rain indicators Fe and Mn in the forest pest moth Dendrolimus punctatus Walker (Lepidoptera:Lasiocampidae) in variously polluted Pinus massoniana Lamb forests in China. The highest density of D. punctatus, as well as the highest Cd levels developed in the moderately polluted forests. Possibly Cd had there broken down the pest resistance of the pines. The paradoxical coexistence of high Cd level and elevated population density of the pest seems to result from the high accumulation of Cd in its ichneumonid parasitoid. In the most heavily polluted forests the Cd level in needles was low, possibly because the strong acid rain had washed away most of the Cd deposit in the soil. It existed there no D.punctatus population. Absence of pest insects from the most heavily polluted areas is a common phenomenon.     

UV/O3复合杀菌去除2,4-DCP的试验研究

以紫外光源为主要依托，变换反应器中的不同工艺条件，分别对紫外光、臭氧和紫外光／臭氧三种不同工艺条件对水中微污染物2，4二氯酚(2，4—DCP)的降解规律进行研究。试验证明，UV／O3复合是一种很有前景的杀菌、除微污染技术。     

Deformity frequencies of benthic marine diatoms associated with contaminated sediments in Hong Kong

ＤｅｆｏｒｍｉｔｙｆｒｅｑｕｅｎｃｉｅｓｏｆｂｅｎｔｈｉｃｍａｒｉｎｅｄｉａｔｏｍｓａｓｏｃｉａｔｅｄｗｉｔｈｃｏｎｔａｍｉｎａｔｅｄｓｅｄｉｍｅｎｔｓｉｎＨｏｎｇＫｏｎｇＭｉｃｋＤｉｃｋｍａｎＥｃｏｌｏｇｙａｎｄＢｉｏｄｉｖｅｒｓｉｔｙＤｅｐａｒｔ...     

Effects of alkaline ameliorator additions on the acidic buffering abilities of aluminum-rich alfisols

Ｅｆｆｅｃｔｓｏｆａｌｋａｌｉｎｅａｍｅｌｉｏｒａｔｏｒａｄｄｉｔｉｏｎｓｏｎｔｈｅａｃｉｄｉｃｂｕｆｆｅｒｉｎｇａｂｉｌｉｔｉｅｓｏｆａｌｕｍｉｎｕｍ－ｒｉｃｈａｌｆｉｓｏｌｓ￥ＷｕＪｉｅｍｉｎ；ＳｈａｏＦｅｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＥｎｖｉｒ...     

Organobentonites as adsorbents for some organic pollutants and its application in wastewater treatment

Ｏｒｇａｎｏｂｅｎｔｏｎｉｔｅｓａｓａｄｓｏｒｂｅｎｔｓｆｏｒｓｏｍｅｏｒｇａｎｉｃｐｏｌｌｕｔａｎｔｓａｎｄｉｔｓａｐｐｌｉｃａｔｉｏｎｉｎｗａｓｔｅｗａｔｅｒｔｒｅａｔｍｅｎｔ￥ＺｈｕＬｉｚｈｏｎｇ；ＺｈａｎｇＪｉａｎｙｉｎｇ；ＬｉＹｉｍｉｎ；Ｓ...     

Biologically effective radiation of solar ultraviolet radiation and the depletion of stratospheric ozone

ＢｉｏｌｏｇｉｃａｌｌｙｅｆｆｅｃｔｉｖｅｒａｄｉａｔｉｏｎｏｆｓｏｌａｒｕｌｔｒａｖｉｏｌｅｔｒａｄｉａｔｉｏｎａｎｄｔｈｅｄｅｐｌｅｔｉｏｎｏｆｓｔｒａｔｏｓｐｈｅｒｉｃｏｚｏｎｅＷａｎｇＳｈａｏｂｉｎ；ＳｕＷｅｉｈａｎ（ＲｅｓｅａｒｃｈＣｅｎｔ...     

Effect of applying selenium fertilizer to improve soil and increase selenium level in food for prevention and treatment of Kaschin-Beck disease

For prevention and treatment of Kaschin-Beck disease by applying Se fertilizer to soil to increase Se up to normal level for the wheat grains is introduced in this paper. After use this measure the intake of Se by the residents in the exemplary area increased from 10.4μg to 33.6 μg per day in average. After supplementing Se to human body one year, there is no new patient found among 300 healthy children in the exemplary area but 4 patients found among 264 healthy children in the control area. It is shown that by applying Se fertilizer to KBD area is a effective way for preventing and cure this disease.     

The ways to prevent pollution of the pulp and paper industry in China

Water pollution from the pulp and paper industry is one of the most serious environment problems in China. In order to prevent and treat pollution of the pulp and paper industry, the following works have been done in recent years: 1. Making necessary policies, measures and regulations; 2. Making overall planning and rational layout; 3. Relying mainly on internal treatment developing external treatment as supplement; 4. Improving the technology of treating wastewater of the pulp and paper industry.     

Mercury pollution and control in China

Before 1970s the Second Songhua River and Ji Canal of China had been polluted seriously by mercury. During peak pollution period, mercury levels in water, sediment and fish body of these rivers were close to or even higher than that of famous Minamata Bay of Japan. Some residents who live near to the polluted rivers were affected and the methyl mercury values in their blood, hair and urine were higher than normal people obviously . Since the fish had decreased even vanished in these rivers, so the food chain that transfers mercury to human also was out off almostly. However, nervous symptoms of Minamata disease were discovered among fisherman who had eaten more fishes. This report relates the stories about the mercury pollution of the Second Songhua River and Ji Canal.     

Study on correlation between humic acid and selenium in Kaschin-Beck disease areas

The relationship between humic acid and selenium content was studied in this research. The results of calculation showed that there is more humic acid and less selenium in Kaschin-Beck disease areas in China. Fulvic acid in soil could increase selenium level in plants. The chemical bonding between humic acid and selenium was observed with an I.R. spectroscope. It was remarkable for the changes of absorption peak and frequency in 1100-1000 cm-1, 900-700 cm-1.