adj.[化]六价的

It proved that hexavalent chromium content in disposed effluent meets national standard for effluent discharge. 实践证明,经处理的废水中六价铬含量达国家排放标准。

Hexavalent chromium is used to plate metals and to make paints, dyes, plastics and inks. 六价铬常作为金属板用于制造涂料、燃料、塑料和墨水。