ORIGINAL RESEARCH
Adsorption Mechanism of Heavy Metals in Heavy
Metal/Pesticide Coexisting Sediment Systems
through Factional Factorial Design Assisted
by 2D-QSAR Models
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College of Environmental Science and Engineering, North China Electric Power University,
Beijing, China
Submission date: 2017-10-02
Final revision date: 2017-11-20
Acceptance date: 2017-12-03
Online publication date: 2018-06-25
Publication date: 2018-07-09
Corresponding author
Yu Li
North China Electric Power University, Beijing, China, 102206 Beijing, China
Pol. J. Environ. Stud. 2018;27(6):2451-2461
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ABSTRACT
Resolution V of the 210-3 fractional factorial design method was used to identify the main effects and
second-order interaction effects of pollutants (copper, cadmium, lead, zinc, nickel, dimethoate, metalaxyl,
atrazine, malathion, and prometryn) on metals adsorption onto sediments, and 2D-QSAR models were
established to reveal the relationships between metal ion characteristics and the effects of pollutants on
metals adsorption. The effects on Cd adsorption were attributed to the main effects of pollutant factor
concentrations, while the effects on Cu, Pb, Zn, and Ni adsorption were from the second-order interaction
effect. No interference with Cd adsorption was observed, and the synergistic contribution of the main
effects and second-order interaction effects on Ni adsorption was 67.26%. Additionally, the antagonistic
contribution rates to Cu, Zn, and Pb adsorption reached 55.31%, 73.16%, and 86.23%, respectively.
Significant correlations existed between the main effects and ionization potential (IP), the change in
ionization potential (ΔIP) and ion hydrolysis ability of metals, and the second-order interaction effects
with atomic number, atomic weight, and polarizing power (Z2/r) of metals. The electrochemical potential,
ΔIP and IP of metals were found to promote adsorption, Z2/r, electronegativity and atomic radius of metals
to inhibit adsorption significantly. Overall, the results provide theoretical support that helps elucidate
compound pollution regulation among heavy metal pollutants in complex environmental systems.