目录前言····························································1第一章 实验部分 ···············································2§1 水样和方法 ··············································21
1 水样 ····················································21
2 试剂和检测方法·············································21
3 实验工艺流程 ·············································2§2 水中铬的测定 ··············································22
1 六价铬的测定 ·············································22
2 总铬的测定 ···············································4§3 化学还原法处理含铬废水 ····································43
1 七水硫酸亚铁处理含铬废水 ·································43
2 亚硫酸钠处理含铬废水 ·····································53
3 偏重亚硫酸钠处理含铬废水 ··································63
4 比较并找出最佳还原剂 ·····································73
5 确定最佳还原剂的最佳反
