Suitability Evaluation of Restoration Plants on Soil Polluted by Heavy Metal Based on AHP-TOPSIS
Restoration plants were studied on the remediation of heavy metals contaminated soil.An indexed system of restoration plant was built by analytic hierarchy process(AHP).Ecological adaptability,technical feasibility and economic feasibility as construction criteria,this system included eight influencing factors.Based on AHP,a judgment matrix was established and its construction was improved.And the most suitable remediation plants were selected through the weighted sorting method of approximating the ideal solution.This system was used to select restoration plants for the remediation of heavy metals contaminated soil in a chemical plant in Shenyang City.15 species of plants taken as screening objects,an improved judgment matrix with minor evaluation error was constructed.In the system drought tolerance is the main factor affecting the remediation effect in phytoremediation of contaminated soil by calculation.The results showed that,wolfsbane was the most suitable for phytoremediation at this site,with a proximity of 0.838 and the removal rate is 82％.It is concluded that the system could analyze the impact of each evaluation index and screen restoration plants objectively and accurately.
mathematical modeling of plant screeninganalytic hierarchy processindicator evaluation systemranking method for approximating ideal solutions
NETL
NSTL
万方数据
