环境化学思维导图

这是一篇关于environmental chemistry的思维导图，详细介绍了环境化学中与空气污染、大气中的二氧化碳以及水相关的内容。

environmental chemistry

• 17.1 air pollution
• 17.2 carbon dioxide in the atmosphere
• 主题
• 17.5-17.6 water
  • how to test purity of water
    • melting point <0
    • boiling point >100
  • how to test presence of water
    • cobalt chloride: blue to pink
    • copper sulfate: white to blue
  • distilled water used in lab rather than tap water: has fewer chemical impurities
  • substances in water
    • dissolved oxygen
      • essential for aquatic life to survive 有溶解氧
    • may damage aquatic life
      • metal compound
        • provide essential minerals for life
        • toxic too many(重金属) damage aquatic life
      • plastic: 被海洋生物吃进去的话 会伤害海洋动物 如果太多 plastic may enter food chain
      • sewage: involve microbes
      • from fertiliser 会lead to deoxygenation
        • phosphate ion
        • nitrates
    • how to treate
      • sedimentation(使用flocculants) and filtration
        • passed through wire screens to remove large twigs
        • passed through coarse gravel to remove large pieces pf dirt
        • passed through fine sand to remove small particles
      • use carbon to remove taste and odour (physical change
      • chlorination to kill bateria and microbes