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Reactive surface functional groups of the [email protected] are strongly important factor for removing of dyes from wastewater; the Boehm titration method provides evidence for the existence of acidic and basic sites (Boehm, 1994). The acidic and basic sites of [email protected] were 0.87 and 0.47 mmol/g, this result show that the [email protected] has mainly acidic character.
The DC electrical conductivity (?DC) values of SVT-PUF, [email protected] and ZnONPs were measured at room temperature and found to be 1.23×10-8, 7.1×10-8 and 5.8×10-6 ?1 m-1, respectively. The conductivity of [email protected] is greater than PUF. This can be attributed to additional new groups due to the interaction between PUF and ZnONPs. Also, the higher conductivity could be due to the uniform distribution of zinc oxide on PUF, as the ZnONPs have excellent electric conductivity.

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