Research Article

[Retracted] Treatment of Comprehensive Wastewater from Chemical and Pharmaceutical Parks by Fly Ash-Coated Iron Electrode Electrocoagulation

Table 2

Chemical composition of fly ash.

ElementVariation rangeAverage value

Silica30–6247.1
Aluminum oxide17–3822.8
Ferric oxide1.2–177.01
Calcium oxide0.6–192.81
Magnesium oxide0.6–3.61.28
Potassium oxide0.5–2.71.03
Sodium oxide0.3–4.11.02
Ignition loss0.8–327.99