Chromiumpollution from leather tanning (more than 1.8 million).
鞣革产生的铬污染-超过180万。
2
Chromium-6 is a naturally occurring metal. Chromiumpollution most commonly comes from mining and other industrial processes.
铬- 6是一种自然形成的金属。铬污染最通常是由采矿和其他工业制造过程造成的。
3
By using chromium containing sludge as sinter ore, not only chromiumpollution of environment was solved, but also resources of Fe and Cr in the sludge were recovered.