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The observed adsorption sequence can be explained by the ionic properties of the metal ions.
Separation factors (α21) were calculated for all binary systems to evaluate BC/Fe3O4's selectivity towards heavy metals.
The obtained separation factors across all systems further confirmed the affinity sequence of the three metals for BC/Fe3O4 following the order Pb²⁺ ≫ Cu²⁺ > Cr³⁺.
This reduced effectiveness can be primarily attributed to two factors.
This hydrolysis affects the surface properties and binding sites of the material, potentially leading to the formation of more stable metal-surface complexes that are more difficult to desorb.

With the rapid development of China's industrial technology, Researching and developing the spring with independent intellectual property is imperative.
This disadvantage will affect the service life.In perpendicular direction of the shear direction, Exerting pressure F，Then do the shear stiffness test，In the shear direction，Exerting pressure and measuring deformation.
References [1] Hesheng Zuo .Mechanical impedance method and application[M]Beijing：Mechanical industry press .1987
The resonant vibration of mechanical theory and application .
Mechanical vibration study[M] Shanghai Jiaotong University Press. 1985.3

The pre-ECAP mechanical properties were 232 MPa tensile strength, 65% elongation, and Vickers hardness of 63 (load: 2.9 N).
After eight ECAP passages, the properties changed to 438 MPa, 28%, and 141, respectively.
The fatigue specimens were electrolytically polished (approximately ≈ 25 mm from the surface layer) prior to mechanical testing to remove any preparation-affected surface layer.
[5] P.Cavaliere, Fatigue properties and crack behavior of ultra-fine and nanocrystalline pure metals, Inter.
[11] N-A.Noda, M.Kagita, Variations of stress intensity factors of a semi-elliptical surface crack subjected to mode I, II, III loading, Inter.

This article introduces two kinds of frame structure system structure for steel structure and reinforced concrete structure, analyzes the similarities and differences in the structural properties, structural occupied area, time limit for a project, project cost and comprehensive economic benefits and other aspects.
Reinforced concrete structure makes reasonable use of two kinds of material mechanical properties for reinforcing steel bar and concrete, this application has a history of nearly 200 years [1-4].
Using different structural materials, the upper structure construction period has a greater impact, but also suffers from the influence of environmental and construction season, geological conditions and many other factors.
Moreover, structural material also affects on external wall maintenance cost, but the external costs of maintenance structure is considered to impact of overall cost in this project.
Conclusions This article introduces two kinds of frame structure system structure for steel structure and reinforced concrete structure, analyzes the similarities and differences in the structural properties, structural occupied area, time limit for a project, project cost and comprehensive economic benefits and other aspects.

All these processes promote to surface hardening and improving tribological properties of ASS [1-5].
Pre-treatment (cold rolling and heat treatment) can significantly change properties of ASS [6].
All these factors influence the diffusion intensity under nitrogen/carbon saturation.
These factors testify to high internal stresses, microstrain of the crystal lattice and low-angle misorientations in structural elements.
Murr, Handbook of materials structures, properties, processing and performance, Springer, Berlin, 2015

It is characterized by extremely good physical properties, particularly strength and durability [1].
The properties that can be achieved include the compressive and flexural strengths, crack-resisting capability, and durability.
Also, RPC has verylow porosity andexhibits durability and transport properties, making RPC potentially a suitable material for the storage of nuclear waste.
In general, there are two major factors, which cause corrosion of reinforcement in concrete to proceed to an unacceptable degree.
Hooton and Andrade[5, 6] indicated that the higher electrical potential (60 V) applied in RCPT generated the heat which may affect the flow speed.

The electrical property of multicrystalline silicon is mainly affected by several factors such as impurity concentration, grain size, crystal boundary, defect and so on.
The compensation effect of donor and acceptor impurities co-doping determines the electrical properties of directionally solidified multicrystalline silicon ingots[6].
Since the impurity concentration in silicon feedstock is relatively high, which increases the difficulty of the research, there are few researches on the resistivity property of multicrystalline silicon prepared by metallurgical method.
The effect of impurity distribution on resistivity was also investigated to clarify the influencing factors of electrical properties of metallurgical silicon.
Tan, et al: submitted to Materials For Mechanical Engineering [10] J.F.

Introduction Much attention has been devoted to glass-ceramic materials due to more excellent properties in the aspects such as thermal, mechanical, electric property and so on compared to their parent glasses.
The present work focuses on the effects of Ca-Mg substitution and P2O5 content on spontaneous crystallization and properties of the obtained glass-ceramics.
As for TGCs, size of crystalline particles and the difference in refractive index of crystals and residual glassy phase is both key factors for the transparency, generally the small particles size and refractive index difference favor good transparency[16].
In this work, crystalline, silicate- and phosphate-rich glassy phases coexist in the precursor glasses as well as glass-ceramics, this complicates the factors to affect the transparency.

The structural performance of body directly affects the security and mobility of vehicle.
It is necessary to do modal analysis of the vehicle body for investigating its dynamic properties under vibration excitation.
From the modal analysis of the body, several files can be got including the modal analysis result, the material properties of the body, the element matrix and interface nodes.
In this paper, considering various factors, the beam layout under the top surface of the hull is adjusted according to the topology optimization density contour to strengthen the body structural stiffness.
So the beam layout optimization doesn’t destroy natural properties of the body.

In particular, the frictional behavior between the sheet metals affects the geometrical formation of the clinched joint significantly.
Since the test setup is one of the instrumented tests, an independent consideration of the influencing factors is possible.
Furthermore, the occurring friction is influenced by various factors that are relevant in forming processes, for example contact pressure, relative speed, temperature and surface change due to abrasion or adhesion wear.
A separation of the specimens using machine cutting processes, wire erosion or water jet cutting is not reasonable, as this processes use cooling lubricants or other media, which may change the surface condition or friction properties.
Numerical simulation was used to determine the properties of such a mounting.