Synthesis of high-quality Na P1 zeolite from municipal solid waste incineration fly ash by microwave-assisted hydrothermal method and its adsorption capacity

Erythromycin Scavenging from Aqueous Solutions by Zeolitic Materials Derived from Fly Ash

“…The total mass losses for NaP1_C and NaP1_FA were ~42 and ~14 wt.%, respectively ( Figure 2 ). Zhou et al [ 64 ] obtained similar results for the total weight loss for the NaP1_FA sample, which was about 10% and, additionally, as a result of the decomposition of carbonates.…”

“…The carbon combustion ends at 790 °C for NaP1_C and 825 °C for NaP1_FA. Woszuk et al [ 62 ] and Zhou et al [ 64 ] have reported an exothermic effect in the range of 450–800 °C for the thermal curves of NaP1_FA zeolite. In the present study, this range started at 300 °C and ended around 800 °C, which is attributable to the dehydroxylation of the OH group.…”

Advances and Outlook of Heavy Metal Treatment Technology from Municipal Solid Waste Incineration Fly Ash: A Review

“…Therefore, they are collectively referred to as zeolite minerals or zeolite media. 68,203,205,206 Conversely, the traditional hydrothermal treatment method may have drawbacks, such as a sluggish reaction rate and low energy conversion efficiency, when producing zeolite-like crystals from fly ash. 203,207,208 Jin et al 209 determined that after conventional hydrothermal treatment, the zeolite-like minerals generated stabilized heavy metals by precipitation, physical encapsulation, ionic adsorption, and ion exchange, leading to a stabilization efficiency of more than 95% for heavy metals.…”

“…Recently, hydrothermal treatment (HT) has become an effective technology because of its ability to utilize aluminum or silicon sources in fly ash at lower temperatures (150–200 °C) or by adding external aluminum and silicon; fly ash is converted to zeolites, katazite, solids, and other materials while immobilizing hazardous heavy metals in the final product. − These silicate minerals, which are like zeolite, have remarkable adsorption capacity and cation exchange capacity (CEC), are thermally stable, and can effectively stabilize heavy metals in hydrothermal processes. Therefore, they are collectively referred to as zeolite minerals or zeolite media. ,,, Conversely, the traditional hydrothermal treatment method may have drawbacks, such as a sluggish reaction rate and low energy conversion efficiency, when producing zeolite-like crystals from fly ash. ,, Jin et al determined that after conventional hydrothermal treatment, the zeolite-like minerals generated stabilized heavy metals by precipitation, physical encapsulation, ionic adsorption, and ion exchange, leading to a stabilization efficiency of more than 95% for heavy metals. Shi et al indicated that the leaching toxicity of Cr, Zn, Cd and Cu was greatly reduced by the hydrothermal application of MSWI FA, which was below the values stipulated in the Toxicity Characteristic Leaching Procedure (TCLP), which indicated that the hydrothermal application of MSWI FA had a beneficial effect on the toxicity reduction of MSWI FA.…”

“…Lin and Chen found that the adsorption of heavy metals Pb 2+ , Cu 2+ and Cd 2+ by ZSM-23 zeolite prepared by MSWI FA was better than commercial activated carbon with adsorption amounts of 516.53 ± 99.67 mg/g, 251.48 ± 14.67 mg/g and 84.85 ± 34.72 mg/g, respectively . To minimize power dissipation, the speed of dissolving aluminum and silicon was expedited, the time of crystallization was shortened, and ultimately microwave was applied to the hydrothermal process. , The extraction rates of Zn, Pb and Cu from fly ash declined during microwave-assisted hydrothermal processes, but Cr leaching increased, as discovered by Gong et al The hydrothermal treatment as a promising MSWI FA detoxification technology offers a promising process for MSWI FA treatment.…”