【摘 要】
：
This paper is to present a laboratory study on the leaching characteristics of heavy metals including Cu, Zn, Ni, As, Pb in pyrolyzed municipal sewage sludge and application of solid residues in the g
【出 处】
：
2012 Postdoctoral Symposium of China on Materials Science &
论文部分内容阅读
This paper is to present a laboratory study on the leaching characteristics of heavy metals including Cu, Zn, Ni, As, Pb in pyrolyzed municipal sewage sludge and application of solid residues in the glass-ceramic.For this purpose, the municipal sewage sludge was pyrolyzed at 600℃ and the change of the total content and leaching concentration of heavy metals in the sludge and solid residues were investigated.The effect of leaching time, liquid-solid ratio and pH on the leaching concentration of heavy metals in the solid residues were studied.Pyrolyzed solid residues were used to prepare glass-ceramic and the related performances of glass-ceramic were tested.The results showed that the content of Cu, Zn, Ni, As, Pb in solid residues significantly increases, but the leaching concentration reduces respectively by 99.70%, 100%, 99.46%, 83.93% and 39.13%.Leaching time, liquid-solid ratio and pH have a certain impact on the leaching concentration of heavy metals in the solid residues.With the increase of leaching time and liquid-solid ratio, the leaching concentration of heavy metals generally increases.But with the increase of pH, the leaching concentration of heavy metals decreases.Pyrolyzed solid residues are used to prepare glass-ceramic and the compressive strength is 170MPa, flexural strength is 38MPa, micro hardness is 5GPa, density is 2.7g/cm, all the performances meet the requirements.
其他文献
The magnetic hysteresis loop is a significant performance of ferromagnetic material.The different-size specimens were fabricated and studied on the basis of magnetomechanical coupling tests.The curve
The effect of annealing temperature in the range of 1020℃-1120℃on the microstructure, mechanical properties and corrosion resistance of low-Nickel duplex stainless steel was investigated.The results s
The microstructures of Mg-2Nd-4Zn-lZr alloy in the as-cast and after heat treatment were investigated.Several kinds of secondary phases were found and characterized by transmission electron microscopy
Right evaluation of the bond behavior between corroded reinforcing bar and concrete wrapped with fiber reinforced polymers (FRPs) is a chief problem to confirm the effect of FRP confinement.the pullou
A composite stiffened panels configuration design method is proposed integrating various mechanical simplified models, dealing with global and local buckle separately based on two-level optimization f
By employing 1,4-diazabicyclo[2.2.2]octane (DABCO) as pillared ligand, a new 3D nano-scale zinc phosphite [Zn3(C6H12N2)2(HPO3)3] has been solvothermally prepared.Its structure is constructed of neutra
Residual stresses are inevitable for fibre metal laminate in curing process, and residual tensile stress is in the metal layer and residual compressive stress is in the fibre layer.In this paper, for
Microstructural evolution of the zirconium alloy deformed at a strain rate of about 1000 s-1 was investigated by means of the experimental design.Four different strain levels the zirconium alloy subje
In order to avoid catastrophic accident during the limit of validity, maintenance programs should be made based on multi-site damage.In this paper, the probability of multi-site damage occurrence, pro
Magnesium alloy as a new type of metal material has been widely used in many fields.However,magnesium has the hcp structure, poor plasticity and hard deformation during forming processing.The grain re