ENVIT, Environmental Technologies and Engineering Ltd.
发明人:
Lestan Domen,Finzgar Neza,Gerl Marko,Gluhar Simon,Lakovic Gorazd,Hamiti Branko
申请号：
US201615277179
公开号：
US10124378(B2)
申请日:
2016.09.27
申请国别(地区):
美国
年份:
2018
代理人:
Renner, Otto, Boisselle & Sklar, LLP
摘要：
A batch process of remediation of soil and sediment contaminated with toxic metals includes the steps of treating contaminated soil and sediment with a solution containing aminopolycarboxylic chelating agent, rinsing the soil/sediment solid phase to remove residues of mobilized toxic metals, treating the used process waters to recycle chelating agent and clean process solutions and placing the remediated soil/sediment on a permeable horizontal reactive barrier to prevent emission of contaminants. In the batch process, toxic metals are removed from process solutions by alkaline adsorption of polysaccharide adsorbents. By applying alkaline adsorption the efficiency of toxic metal removal from process solutions and alkaline and acidic recycling of chelating agent is significantly improved.
