HEAVY METALS IN AGRICULTURAL WASTE.  

2017-09-21
Heavy metals are defined as metallic elements that have a relatively high density compares to water. With the assumption that heaviness and toxicity are inter-related. heavy metals also include metalloids ...

HEAVY METALS IN AGRICULTURAL WASTE.  

2017-09-18
Heavy metals are defined as metallic element that have a relatively high density compared to water. With the assumption that heaviness and toxicity are inter-related, heavy metals also include metalloids, ...