The first method use less reagents and avoid the secondary pollution from silver salt and mercuric salt and chromiumsalt with short digestion time which reduce the energy.
试验过程试剂用量小，减少了银盐、汞盐、铬盐带来的二次污染问题；消解过程短，能有效降低能耗。
2
Pollution problem of solid hazard waste from production of chromiumsalt refer two aspect: the one was old slag of donkey's years' store up, the another was keeping procreant fresh slag.
铬盐生产中固体危险废物污染问题主要涉及两个方面：一是多年积存的老渣，二是不断产生的新渣。
3
A complete utilization new method of zero discharging chromium poison and resource is used to process the waste residue which is discharged in metal chromium and chromiumsalt producing process.