Synthesis and Characterization of NaX Zeolite from Coal Gangue and Its Efficacy in Cd and Pb Remediation in Water and Soil.

Alkaline fusion is a pivotal process influencing the cost of synthesizing zeolite from coal gangue. This study examined the effects of alkaline fusion temperature ( ), treatment duration ( ) and the NaOH/coal gangue weight ratio ( ) on the composition and properties of the products, as well as their adsorption capacities for Cd ( ) and Pb ( ). Response surface methodology (RSM) was employed to analyze the interactions among these factors, and the adsorption mechanisms for Cd and Pb were investigated using X-ray diffraction, scanning electron microscopy-EDS, Fourier transform infrared, X-ray photoelectron spectroscopy, and N adsorption-desorption techniques.

Process Optimization of Dual-Liquid Casting and Interfacial Strength-Toughness of the Produced LAS/HCCI Bimetal.

The pouring time interval is the decisive factor of dual-liquid casting for bimetallic productions. Traditionally, the pouring time interval is fully determined by the operator's experience and on-site observation. Thus, the quality of bimetallic castings is unstable.