Enhanced Degradation of Rh 6G by Zero Valent Iron Loaded on Two Typical Clay Minerals With Different Structures Under Microwave Irradiation

Abstract

Nanoscale zero valent iron has been a widespread concern in various fields due to its large specific surface area and high reactivity. However, nanoscale zero valent iron (nZVI) is very likely to aggregate and be oxidized, which limit its wide application in industry. Most clay minerals have a large adsorption capacity of cations due to their negative charges and high specific surface areas. In the present work, nZVI was loaded onto two typical clay minerals: kaolinite and sepiolite, to inhibit its oxidation and aggregation. The composites were applied to degrade Rhodamine 6G (Rh 6G) under microwave irradiation. The effects of pH value and microwave power on degradation were studied. The results showed that the removal amount of Rh 6G by nZVI/kaolinite was 110 mg/g in 15 min, while it reached 300 mg/g by nZVI/sepiolite. The difference between these two composites was mostly determined by the structures of these two clay minerals.

A High-Efficiency CuO/CeO2 Catalyst for Diclofenac Degradation in Fenton-Like System

“…Some metal oxides (such as CeO 2 , Al 2 O 3 ), clays, zeolites and carbon materials have been used as supports (Rao et al, 2018; Xu et al, 2018). The support increases the specific surface area of catalyst and reduces the leaching of metal ions (Du et al, 2016), which are beneficial to the adsorption property and stability of catalyst.…”

Solvent‐Free Hantzsch Condensation Reaction Leading to Polyhydroquinoline and 1,8‐Dioxo‐decahydroacridine Derivatives Promoted by Nanosized Kaolin‐[BTMSP]‐NH2+ HSO4−

“…[41] Among these, more attention has been paid to the natural clays because of their prominent physicochemical properties, abundant in nature all over the world, low-cost, and environmental advantages. [42,43] Kaolin, one of the common clay minerals, is inexpensive, easily available, non-toxic, biocompatible, resistant to microbial attacks, easily recoverable by centrifugation, filtration, or decantation and also due to its inorganic silicate framework, has high thermal and mechanical stability. [44][45][46][47] Kaolin is composed mainly of kaolinite (Al 2 Si 2 O 5 (OH) 4 ) and other related clay minerals e. g. quartz, illite, and muscovite.…”

Visible Light-Based Ag3PO4/g-C3N4@MoS2 for Highly Efficient Degradation of 2-Amino-4-acetylaminoanisole (AMA) from Printing and Dyeing Wastewater

“…The AMA-dyed wastewater contains a large amount of waste and by-products’ waste liquid. The poor treatment of AMA-dyed wastestream could lead to serious water pollution [ 5 ]. At present, the common techniques for printing and dyeing wastewater treatment mainly include physical adsorption [ 6 ], coagulation [ 7 ], membrane separation [ 8 ], chemical oxidation [ 9 ], and biological methods [ 10 ].…”