Fe incorporated mesocellular foam as an effective and stable catalyst: Effect of Fe concentration on the characteristics and activity in Fenton-like oxidation of acid red B

Purification treatment of dyes wastewater with a novel micro-electrolysis reactor

“…However, large amounts of hydrogen generating under acidic condition inactivate the iron, which inhibits the microscopic galvanic cell reaction. In addition, the studies show that large amounts of Fe 2+ generating with the stronger acid will disturb the detection of Page 9 of 34 COD and chroma due to the reducibility and color-rendering property of Fe 2+ [31,32]. Therefore, pH was controlled at about 3.5 in the following experiments.…”

Fe Oxides Loaded on Carbon Cloth by Hydrothermal Process as an Effective and Reusable Heterogenous Fenton Catalyst

“…The micropore volume also increased from 0.377 mL/g to 0.627 mL/g. The specific surface area (S BET ) of the as-prepared Fe@CC increased from 826.4 to 1325.5 m 2 /g when the temperature increased from 160 • C to 200 • C with 0.1 M Fe(NO 3 ) 3 . The S BET of Fe@CC obtained at 200 • C increased by 81.8% compared with that of raw carbon cloth (728.9 m 2 /g).…”

“…The S BET of Fe@CC obtained at 200 • C increased by 81.8% compared with that of raw carbon cloth (728.9 m 2 /g). In order to check whether the increase of S BET of Fe@CC was attributed to the hydrothermal acidification of HNO 3 produced by the hydrolysis of Fe(NO 3 ) 3 , or the formation of FeOOH/Fe 2 O 3 particles loaded on the surface of carbon cloth, the carbon cloth was hydrothermal treated at 200 • C with different concentration of HNO 3 , and the isothermal adsorption desorption curves were shown in Figure 1B. It increased to 682.5 m 2 /g and 740.6 m 2 /g when the HNO 3 concentration was 0.1 M and 0.3 M, respectively.…”

“…Fenton reaction is one of the extensively studied advanced oxidation process that is effective for pollutants treatment [1][2][3][4][5]. This process shows obvious advantages on oxidizing recalcitrant substances, and it is usually used as pretreatment process to increase the biodegradability of the wastewater by increasing the B/C value [6][7][8].…”

“…However, the high dispersion in this catalyst also facilitates the iron leaching, and the stability of the catalysts was not studied. Fe 2 O 3 loaded active carbon fiber catalyst (Fe 2 O 3 /ACF) was prepared for Fenton reaction by calcining the impregnated active carbon fiber with Fe(NO 3 ) 3 at 500 • C [21], and the result indicated that Fe 2 O 3 /ACF showed relatively low activity on Fenton reaction. This result could be attributed to the improper selection of ACF support.…”