The masson pine (Pinns massoniana Lamb.) forest of 2000 ha situated on Nanshan, the south bank of the Yangtze River near Chongqing, China. From 1982, some trees began to die. Since then, half of the trees have died an...The masson pine (Pinns massoniana Lamb.) forest of 2000 ha situated on Nanshan, the south bank of the Yangtze River near Chongqing, China. From 1982, some trees began to die. Since then, half of the trees have died and the whole forest is in danger. Prom November 1986 to January 1987, a study dealt with the characteristics of fogwater in that area was carried out, in order to explain the relationship between acid fog and masson pine decline. The results of our study showed that the acid fog might be responsible in part for the decline of the masson pine forest.展开更多
A new type of corrosion inhibitor and fog suppressor composed of Nitrogen-containing alkaloid,water-soluble butadiene lower polymer, and inorganic electrolyte has been investigated by gravimetric and electrochemical m...A new type of corrosion inhibitor and fog suppressor composed of Nitrogen-containing alkaloid,water-soluble butadiene lower polymer, and inorganic electrolyte has been investigated by gravimetric and electrochemical method. Effects or this chemicals on pickling rate and hydrogen penetration into iron and steel material in 50～150 g/L HCI or/and H2SO4 solutions at 20～70℃ temperature were examined. The amount of acid fog escaping from the surface of air-liquid was determined by chemical titration. The results indicate that the efficiency of inhibition and suppression depends on film properties by which mean a barrier film on the interface of bare mild steel/solution or an unsolvable liquid membrane as hydrophibic effect.In present work the film-forming mechanism by in situ and chemistry-mechanics effect is also discussed.展开更多
SO2 in fogwaters of Qingdao has been stuided in June and July, 1991. Analytical method of SO2 in fogwaters has been established. From south to north and from east to west in Qingdao, the pollution of SO2 changes stron...SO2 in fogwaters of Qingdao has been stuided in June and July, 1991. Analytical method of SO2 in fogwaters has been established. From south to north and from east to west in Qingdao, the pollution of SO2 changes strongly, its concentrations are in the ranges 0. 03-14. 00 mg/L. Pollution regions of acid fog were divided with weight factors of pH value. SO2, SO3 and NO2. The mark values of pH, SO2, SO3 and NO2 are given in the same pollution dergee, i. e. 0. 48 pH unit, 2. 5l, 42. 13 and 3. 42 mg/L respectively. The efficient projects of controlling acid fog pollution has ben suggested in this paper. This has an impor tant role in the research of the globe acidic precipitation.展开更多
文摘The masson pine (Pinns massoniana Lamb.) forest of 2000 ha situated on Nanshan, the south bank of the Yangtze River near Chongqing, China. From 1982, some trees began to die. Since then, half of the trees have died and the whole forest is in danger. Prom November 1986 to January 1987, a study dealt with the characteristics of fogwater in that area was carried out, in order to explain the relationship between acid fog and masson pine decline. The results of our study showed that the acid fog might be responsible in part for the decline of the masson pine forest.
文摘A new type of corrosion inhibitor and fog suppressor composed of Nitrogen-containing alkaloid,water-soluble butadiene lower polymer, and inorganic electrolyte has been investigated by gravimetric and electrochemical method. Effects or this chemicals on pickling rate and hydrogen penetration into iron and steel material in 50～150 g/L HCI or/and H2SO4 solutions at 20～70℃ temperature were examined. The amount of acid fog escaping from the surface of air-liquid was determined by chemical titration. The results indicate that the efficiency of inhibition and suppression depends on film properties by which mean a barrier film on the interface of bare mild steel/solution or an unsolvable liquid membrane as hydrophibic effect.In present work the film-forming mechanism by in situ and chemistry-mechanics effect is also discussed.
文摘SO2 in fogwaters of Qingdao has been stuided in June and July, 1991. Analytical method of SO2 in fogwaters has been established. From south to north and from east to west in Qingdao, the pollution of SO2 changes strongly, its concentrations are in the ranges 0. 03-14. 00 mg/L. Pollution regions of acid fog were divided with weight factors of pH value. SO2, SO3 and NO2. The mark values of pH, SO2, SO3 and NO2 are given in the same pollution dergee, i. e. 0. 48 pH unit, 2. 5l, 42. 13 and 3. 42 mg/L respectively. The efficient projects of controlling acid fog pollution has ben suggested in this paper. This has an impor tant role in the research of the globe acidic precipitation.
