Adsorption of carbamate pesticides from water onto a self-polymerized α,α'- dichloro-p-xylene resin

Carbamate pesticides have played an irreplaceable role in increasing crop yield and ensuring harvests, meantime, pesticide residues could lead to the severer environmental pollution. A, a΄- dichloro-p-xylene (XDC) self-polymerization resin was prepared through the Friedel–Crafts reaction in this study. The XDC self-polymerization resin was subsequently modified by hydroxylation and amination. The characteristics of the modified resins revealed that carboxyl and amine had incorporated into the XDC self-polymerization resin successfully, and the two modified resins’ pore diameter distributions transferred from 3.00 nm to 3.34 nm and 5.70 nm, respectively. The adsorption properties of three carbamate pesticides—tsumacide, carbofuran, and pirimicarb—on the XDC self-polymerization resin were investigated, and the experimental isotherms exhibited excellent agreement with the Langmuir equation. The modified resins exhibited the highest carbamate pesticides adsorption capability, the experimental isotherms exhibited excellent agreement with the Langmuir equation at room temperature (100.00, 111.11, and 128.71 mg/g , respectively). Meanwhile, the pseudo-second-order rate equation could characterize the kinetic data of three carbamate pesticides adsorption on XDC self-polymerization resin.