aquifer : 含水土層,地下蓄水層

unpalatable : 味道差的;難吃的 ; 討厭的;使人不快的

desalination : 【化】去鹽作用

Storm drain : 雨水排水孔

coagulation : 凝結;凝結物

floc : 絮狀物, (填塞用的)毛屑;廢棉絮

sladge : 爛泥, 泥狀雪, 沈澱物, (海上的)小浮冰

flocculation : 使(雲)成毛狀團塊 ; 使(土壤)結成小團塊 ; 絮化



sulfur : 硫
sulfide : 【化】硫化物
sulfite : 亞硫酸鹽 (-SO3)
sulfate : 硫酸鹽 ; 硫酸 ... (-SO4)




chlorine : 【化】氯
chloride : 【化】氯化物
chlorite : 【化】氯酸鹽
chlorate : 【化】氯酸鹽

alum : 明礬
Alum (pronounced /?al?m/) is both a specific chemical compound and a class of chemical compounds. The specific compound is the hydrated aluminium potassium sulfate with the formula KAl(SO4)2.12H2O. The wider class of compounds known as alums have the related stoichiometry, AB(SO4)2.12H2O.

As a Chemical Flocculant

    * Alum is used to clarify water by catching the very fine suspended particles in a gel-like precipitate of aluminium hydroxide. This sinks to the bottom of the containing vessel and can be removed in a variety of ways.
    * Alum may be used to increase the viscosity of a ceramic glaze suspension; this makes the glaze more readily adherent and slows its rate of sedimentation.
    * Alum is an ingredient in some recipes for homemade modeling compounds intended for use by children. (These are often called "play clay" or "play dough" for their similarity to "Play-Doh", a trademarked product marketed by American toy manufacturer Hasbro).


effluent : 流出物, 流出的