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据有关资料介绍,制取铬酸盐的化工厂每生产1t铬酸盐将产生4～5t废渣,全国每年的废渣达27.3万t.以辽宁某化工厂为例,过去没有得到处理的废渣达13万t.而预计2003年还将产生废渣6～7万多t.这样多的废弃物不但会严重污染环境,而且若长时间接触易引起铬疮,鼻穿孔等难以治疗的疾病.如何变废为宝,化害为益,是当今研究的重要课题.
According to the relevant information, chromate chemical plant producing 1t chromate each will produce 4 ~ 5t waste, the national annual waste reached 273,000 t.Liaoning a chemical plant, for example, in the past have not been treated waste up to 130,000 t. And it is estimated that in 2003 will also produce more than 6 to 70,000 t of waste. Such waste will not only seriously pollute the environment, but also if prolonged exposure easily lead to chromium sores, nasal piercing and other difficult to treat the disease. Waste to treasure, harm for the benefit, is an important issue in today’s research.