Characteristics, Distribution, and Source Analysis of the Main Persistent Toxic Substances in Karst Groundwater at Jinan in North China

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td class="align_left">Quality classification of toxic heavy metals in karst water</td><td class="align_center">Number of samples</td><td class="align_center">Percentage (%)</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td class="align_left">I</td><td class="align_center">99</td><td class="align_center">51.03</td></tr><tr><td class="align_left">II</td><td class="align_center">77</td><td class="align_center">39.69</td></tr><tr><td class="align_left">III</td><td class="align_center">12</td><td class="align_center">6.19</td></tr><tr><td class="align_left">IV</td><td class="align_center">4</td><td class="align_center">2.06</td></tr><tr><td class="align_left">V</td><td class="align_center">2</td><td class="align_center">1.03</td></tr><tr><td class="align_left">Total</td><td class="align_center">194</td><td class="align_center">100</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Comprehensive quality evaluation of toxic heavy metals in fractured karst water.</div>

Journal of Chemistry

tab4

Table 4

Table 4: Characteristics, Distribution, and Source Analysis of the Main Persistent Toxic Substances in Karst Groundwater at Jinan in North China 