需氧污染物 的英文怎麼說

中文拼音 [xūyǎngwūrǎnwù]
需氧污染物 英文
oxygen demanding pollutants
  • 需 : Ⅰ動詞（需要） need; want; require Ⅱ名詞1. （需用的東西） necessaries; needs 2. （姓氏） a surname
  • 氧 : 名詞[化學] （氣體元素） oxygen （o）
  • 污 : Ⅰ名詞（臟水; 臟物） slops; sewage; dirt; filth Ⅱ動詞（弄臟） defile; dirty; smear Ⅲ形容詞1 （臟）...
  • 染 : Ⅰ動詞1 （用染料著色）dye 2 （感染） catch [contract] （a disease） 3 （沾染） acquire （a bad hab...
  • 物 : 名詞1 （東西） thing; matter; object 2 （指自己以外的人或與己相對的環境） other people; the outsi...
  • 污染物 : contaminants
  • 污染 : pollute; contaminate
  1. The effort of manganese removal was studied and the kinetics of manganese removal was tried to establish. the factors of dissolved oxygen concentration, fe2 + concentration, ph, p concentration and closing of the filter were studied to evaluate their effort for biological manganese removal, and the correlation of residual manganese and oxidation - reduction potential was also discussed. as the iron content of water was high, experiment results showed that the reaction was zero order, as the iron content of water was low, the reaction was first order. the time needed for the cultivation of biological manganese removal was 60 70 days. the filter operated at the filtration rate of 8 10m / h, silica sand of effective size 0. 95 1. 25mm filled the filter to a depth of 1200mm

    試驗結果表明，成熟后濾砂表面濾膜的x射線衍射圖譜與mno _ x ? 5h _ 2o （ x = 1 . 86 ）的x射線衍射圖譜一樣，濾膜成熟后的結構在進水物質不發生變化的情況下不發生變化;合適的碳磷比對生物除錳有明顯的促進作用，試驗條件下的投磷量不會對出水造成二次污染;生物除錳需要亞鐵的參與，亞鐵的存在除了能夠促進微生物分泌胞外酶並刺激其活性外，還通過鐵離子的變價傳遞電子，催化錳離子的氧化反應，從而促進對二價錳的降解。
  2. We will mount the historical photographs on acid - free or low alkaline paper. then the photographs can be stored inside archival boxes which are acid - free or low alkaline. this can prevent the contamination of the surface of photographs by dirt particles and wrapping paper that may lead to the chemical reaction like oxidation, yellowing and colour fastness

    部份藏品如歷史圖片及明信片更需要特別的保護，博物館會使用不含酸性或低鹼度的紙張及紙板裝裱歷史圖片，再存放于不含酸性或低鹼度的紙盒內，防止圖片上藥膜受到空氣及一般包裝紙的雜質污染而產生化學作用，如圖片氧化、變黃、退色等。
  3. In 2005, 61 physical and chemical parameters were measured and analysed in sediments. these included particle size, electrochemical potential as highly anoxic sediment with negative potential is related to organic pollution, chemical oxygen demand which indicates organic pollutants, total sulphide inorganic constituents, source of the unpleasant - smelling gas hydrogen sulphide, 15 metals and metalloids aluminium, arsenic, barium, boron, cadmium, chromium, copper, iron, lead, manganese, mercury, nickel, silver, vanadium and zinc, and trace toxic organics pahs and pcbs - 16 compounds and 18 congeners respectively

    2005年，沉積物監測包括分析61種物理及化學參數，其中有粒子大小電化學勢有機污染促使沉積物缺氧，而讓電化學勢呈負數值化學需氧量顯示有機污染程度總硫化物無機物，是造成難聞氣體硫化氫的主因15種金屬及準金屬鋁砷鋇硼鎘鉻銅鐵鉛錳汞鎳銀釩及鋅和痕量毒性有機物多環芳烴及多氯聯苯分別為16種復合物及18種同質物。
  4. Farmers outside the prohibition areas were permitted to continue rearing livestock, but they were required to properly dispose of their waste and treat their effluent so that it complied with standards of no more than 50 mg l of suspended solids and 50 mg l of 5 - day biochemical oxygen demand by the mid - 1990s

    禁制區以外的禽畜農戶繼續獲準飼養禽畜，但必須適當地處置禽畜廢物和污水，在1990年中期之前達到污染物排放標準，即懸浮固體含量不超過50毫克公升，五天生化需氧量不超過50毫克公升。
  5. Electrolytic polishing needs expensive equipments and jigs ; and chemical polishing make worse damage to environment and workers. easily make cyber - flashing sand plane

    電解拋光設備投資大，需特殊夾具;化學拋光和電解拋光產生的氮氧化物和酸霧等嚴重污染環境並毒害人體
  6. Low dissolved oxygen can be harmful to most aquatic life, whereas high 5 - day biochemical oxygen demand and ammonia nitrogen levels indicate the presence of organic pollution and sewage contamination

    溶解氧含量過低會危害大部分水生物的生存，而五天生化需氧量和氨氮水平則顯示河溪受有機物和生活污水污染。
  7. This method measures the reduction over time in the overall organic pollution load in a given river catchment area, expressed in terms of kilograms of biochemical oxygen demand per day kg bod day

    這套方法通稱為污染減幅量，可計算個別河溪集水區某一段時間內有機污染物總量的減幅，這是以每日生化需氧量千克數值表示千克生化需氧量日。
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