The causes of formation of black and smelly river water were summarized,including the entry of organic pollutants into rivers,such as domestic waste,three industrial wastes,thermal pollution caused by industrial hot d...The causes of formation of black and smelly river water were summarized,including the entry of organic pollutants into rivers,such as domestic waste,three industrial wastes,thermal pollution caused by industrial hot drainage,pollution of the river bottom and resuspension movement,and so on. The existing modes and valence changes of iron,sulfur and other elements in black and smelly water were discussed. It is clear that the formation of the black and stink is mainly caused by blackening factors and stink-causing factors. It is concluded that the main blackening factors are ferrous sulfide,manganese sulphide,and the main stink-causing factors are hydrogen sulfide,ammonia or sulfides( VOSCs),josamidine and 2-dimethyl isobenol based on sulfur elements. It provides theoretical reference for the control of black and smelly river water in island cities.展开更多
This paper presents the different categories of communicative names of cities and streets with some examples all over the world. The commemorative role is playing also by the names of some continents, like America, fr...This paper presents the different categories of communicative names of cities and streets with some examples all over the world. The commemorative role is playing also by the names of some continents, like America, from the Amerigo Vespucci＇s name. But many countries and states particularly in the Americas remember the Columbus＇ name. Many city names remember political leaders of great significance, like Washington after Georg Washington, Monrovia after James Monroe, Leningrad （today Saint Petersburg, which remembered the tsar Peter I）. Two soviet leaders, Lenin and Stalin were remembered by two Russian cities, Leningrad and Stalingrad, nowadays Saint Petersburg and Volgograd. The name Ho Chi Minh, after the North Vietnamese leader. The names of other regions and cities have been considered, like many cities and islands named Georgia after some kings. Also Louisiana, The Carolinas, Lfopoldville, Elisabethville were named after other kings and queens. Some cities and islands＇ names remember explorers, like Cook, Stanley, Louren^o Marques （today Maputo, after the name of a fiver）, Brazzaville after, Pietro Paolo Savorgnan di Bra77h etc. Rio de Janeiro is named after the date of its discovery. Many place names were named after Alexander the Great, outer than the Italian Alesssandria, named after the Pope Alexander III. Many place names remember Saints, particularly in Latin America, but also in North America, like St. Francisco. The streets＇ names are many all over the world. In Rome we have streets names to politicians, like Camill Benso di Cavour, Giuseppe Mazzini and Palmiro Togliatti; writers like Alessandro Manzoni and Torquato Tasso. A name like Giuseppe Garibaldi is extremely diffused in all Italy and also in other countries.展开更多
基金Supported by Zhejiang Public Welfare Technology Application Research Project(2016C33054)Science and Technology Plan Project of Zhoushan City(2016C41006)
文摘The causes of formation of black and smelly river water were summarized,including the entry of organic pollutants into rivers,such as domestic waste,three industrial wastes,thermal pollution caused by industrial hot drainage,pollution of the river bottom and resuspension movement,and so on. The existing modes and valence changes of iron,sulfur and other elements in black and smelly water were discussed. It is clear that the formation of the black and stink is mainly caused by blackening factors and stink-causing factors. It is concluded that the main blackening factors are ferrous sulfide,manganese sulphide,and the main stink-causing factors are hydrogen sulfide,ammonia or sulfides( VOSCs),josamidine and 2-dimethyl isobenol based on sulfur elements. It provides theoretical reference for the control of black and smelly river water in island cities.
文摘This paper presents the different categories of communicative names of cities and streets with some examples all over the world. The commemorative role is playing also by the names of some continents, like America, from the Amerigo Vespucci＇s name. But many countries and states particularly in the Americas remember the Columbus＇ name. Many city names remember political leaders of great significance, like Washington after Georg Washington, Monrovia after James Monroe, Leningrad （today Saint Petersburg, which remembered the tsar Peter I）. Two soviet leaders, Lenin and Stalin were remembered by two Russian cities, Leningrad and Stalingrad, nowadays Saint Petersburg and Volgograd. The name Ho Chi Minh, after the North Vietnamese leader. The names of other regions and cities have been considered, like many cities and islands named Georgia after some kings. Also Louisiana, The Carolinas, Lfopoldville, Elisabethville were named after other kings and queens. Some cities and islands＇ names remember explorers, like Cook, Stanley, Louren^o Marques （today Maputo, after the name of a fiver）, Brazzaville after, Pietro Paolo Savorgnan di Bra77h etc. Rio de Janeiro is named after the date of its discovery. Many place names were named after Alexander the Great, outer than the Italian Alesssandria, named after the Pope Alexander III. Many place names remember Saints, particularly in Latin America, but also in North America, like St. Francisco. The streets＇ names are many all over the world. In Rome we have streets names to politicians, like Camill Benso di Cavour, Giuseppe Mazzini and Palmiro Togliatti; writers like Alessandro Manzoni and Torquato Tasso. A name like Giuseppe Garibaldi is extremely diffused in all Italy and also in other countries.
