Autor: Mildred McCarthy

Many types of urban soils, including tree pit soil, contain elevated concentrations of trace metals as compared to agricultural and natural soils. Chapter One describes how trace metals from vehicula …

Germanium is a relatively scarce element found in the Earth’s crust at a concentration of 0.007% in the form of bromides, chlorides, fluorides, iodides, hydrides, oxides, selenides, sulfides and telu …