【摘 要】
：
The aim of this work was to investigate the effect of different surfactants on the removal efficiency of heavy metals in sewage sludge treated by a method combi
论文部分内容阅读
The aim of this work was to investigate the effect of different surfactants on the removal efficiency of heavy metals in sewage sludge treated by a method combining bio-acidification with Fenton oxidation. Four surfactants were adopted such as anionic surfactant (sodium dodecyl benzene sulfonate, SDBS), nonionic surfactants (tween-20 and tween-60) and cationic surfactant (hexadecyl trimethyl ammonium chloride, HTAC), respectively. The indigenous sulfur-oxidizing bacteria in bio-acidification phase were enriched and cultured from fresh activated sludge obtained from a wastewater treatment plant. It is shown that different surfactants exhibited distinct effect on the removal efficiency of heavy metals from sewage sludge. The nonionic surfactants, especially tween-60, promotes the solubilization of heavy metals, while the anionic and cationic surfactants hinder the removal of heavy metals. Copper is efficiently leached. The removal efficiency of cadium is relatively lower than that of Cu due to the demand for rigorous pH value. Lead is leached with a low efficiency as the formation of low soluble PbSO4 precipitates.
其他文献
A novel coordination polymer,[Pr2(BIPA)3(H2O)2]·2H2O (1) (H2BIPA=5-bromoisophthalic acid),was prepared by hydrothermal synthesis and characterized by IR spectr
Ni-W-P composite coatings reinforced by CeO2 and SiO2 nano-particles on the surface of common carbon steels, were prepared by double pulse electrodeposition. Th
Based on the log-linear virtual age process, an imperfect preventive maintenance policy for numerical control (NC) machine tools with random maintenance quality
Real time remaining useful life (RUL) prediction based on condition monitoring is an essential part in condition based maintenance (CBM). In the current methods
Mg-6%Al-1%Sn (mass fraction) alloy is a newly developed anode material for seawater activated batteries. The electrochemical properties of Mg-1%Sn, Mg-6%Al and
The present investigation addresses the simultaneous effects of heat and mass transfer in the mixed convection peristaltic flow of viscous fluid in an asymmetri
随着社会的不断发展，科技的进步，在市场方面已经进入了客户为主导的时代。而教育业的兴起也受到了人们越来越多的关注。教育培训机构作为对学校教育的发展，同时教育机构也为社会
Anodized composite films containing SiC nanoparticles were synthesized on Ti6Al4V alloy by anodic oxidation procedure in C4O6H4Na2 electrolyte. Scanning electro
探讨了如何加强工程造价控制中预算的编制工作,并提出了构建控制工程造价的思路,以提高概算编制质量,为有效地控制工程造价奠定坚实的基础。
This paper discusses how to s
A motion parameter optimization method based on the objective of minimizing the total energy consumption in segment positioning was proposed for segment erector