The pot and plot experiments to study the effect of sewage sludge compost and sewage sludge compound fertilizers on vegetables yield and heavymetal accumulation in vegetables.
通过盆栽和小区试验初步探讨了污泥复合肥对蔬菜的增产效应及其对蔬菜吸收累积重金属的影响。
2
Objective: To investigate the content limit of heavymetal and arsenicum in compound bergenin tablets.
前言：目的：考察确定复方虎耳草素片重金属与砷盐含量限度。
3
Zeolite is a natural and cheap mineral, which could be used in the removal of ammonia nitrogen, organic compound, turbidity, heavymetal and oxyanion from water.