After process improvement, "zero discharge" of chlorine water was realized with sodium hypochlorite and liquid lime chloride products which were produced by chlorine water.

通过工艺技术改造，利用氯水生产次氯酸钠、漂液等氯产品，实现了氯水的“零”排放。

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Since 1908, chlorine has been added to drinking water.

自从1908年起，氯就被添加到饮用水当中了。

《柯林斯英汉双解大词典》

Chlorine is used to disinfect water.

氯用来给水消毒。

《柯林斯英汉双解大词典》

After their first tests, the researchers cleaned the water system with chlorine dioxide.

VOA: special.2011.04.06

Other values recorded include ammonia, chlorine, water hardness (calcium and magnesium), dissolved oxygen and organic carbon.

BBC: Thames archive reveals long nitrate rise

When the Department of Environmental Protection noticed hydrogen sulfide in the city's water supply, Stephen Hollowell, general manager of Steinhatchee's chlorine-based water-treatment plant, and his board were willing to a take a chance on new technology.

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The machine blends iron, bleach and sodium hydroxide to form a dark purple liquid mixture of ferrate, salt and water that gets metered into the water supply. (The color disappears instantly as it reacts with the water.) Common disinfectants ozone and chlorine can turn the water cloudy or, worse, leave behind harmful chemical by-products.

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