scholarly journals Synthesis, Characterization and Application of Nano-adsorbent Materials in the Sorption of Pb(II), Ni(II), Co(II), Mn(II), Li(I) from Aqueous Solution

2014 ◽  
Vol 10 (8) ◽  
pp. 3053-3067 ◽  
Author(s):  
Hamdi Mohamed Hassan Gad ◽  
Sh. Labib ◽  
M. I. Aly
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Activated Carbon ◽  
Sorption Process ◽  
Zinc Silicate ◽  
Activation Technique ◽  
Factors Affecting ◽  
Nano Zinc ◽  
Adsorbent Materials ◽  
Nano Adsorbent

In this study, nano-adsorbent materials were synthesized from two different precursors by thermal activation technique. The first was the synthesizing of nano-zinc silicate from chemical reagents of zinc oxide and commercial silica gel. The second was the preparation of nano-pore size activated carbon from different biomass. The synthesized nano-adsorbent materials were characterized by different techniques; Surface Area, FTIR, XRD and SEM. The prepared nano-adsorbent materials were applied in the sorption and separation of some heavy metals from aqueous solution. These metals includes; Pb (II), Ni(II), Co(II), Mn(II) and Li(I). Some factors affecting on the sorption process (e.g. contact time and pH) were investigated. It was found that: the nano-zinc silicate (of ratio 1:1 thermally treated at 700 0C) and nano-pores activated carbon (prepared from saw dust impregnated with 70% H3PO4 overnight, then heated to 500 0C in presence of steam for 80 min.) were the best samples for sorption and separation of concerned heavy metals.

scholarly journals Adsorption of Polycyclic Aromatic Hydrocarbons (PAHS) from Aqueous Solutions on Different Sorbents

2014 ◽  
Vol 13 (2) ◽  
pp. 87-96 ◽  
Author(s):  
Marzena Smol ◽  
Maria Włodarczyk-Makuła ◽  
Dariusz Włóka
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Aromatic Hydrocarbons ◽  
Environmental Samples ◽  
Sorption Process ◽  
Mineral Sorbent ◽  
Polycyclic Aromatic ◽  
Individual Hydrocarbons ◽  
Treatment Procedures

Abstract This paper presents the results of the possibility and effectiveness of PAHs removal from a model aqueous solution, during the sorption on the selected sorbents. Six PAHs (naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene) listed by EPA for the analysis in the environmental samples were determined. Model aqueous solution was prepared with RESTEK 610 mix PAHs standard. After the sorption process, decrease in the concentration of individual hydrocarbons was observed. The removal percentage was dependent on the type of sorbent (quartz sand, mineral sorbent, activated carbon). The highest efficiency (98.1%) was observed for activated carbon.. The results shows that the sorption processes can be used in aqueous solutions treatment procedures.

One-pot synthesis of a novel magnetic activated carbon/clay composite for removal of heavy metals from aqueous solution

2018 ◽  
Vol 40 (12) ◽  
pp. 1761-1776 ◽  
Author(s):  
Van Thuan Le ◽  
Thi Kieu Ngan Tran ◽  
Dai Lam Tran ◽  
Hoang Sinh Le ◽  
Van Dat Doan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Activated Carbon ◽  
One Pot ◽  
Magnetic Activated Carbon ◽  
One Pot Synthesis ◽  
Removal Of Heavy Metals

Preparation and characterization of Ca-doped zinc oxide nanoparticles for heavy metal removal from aqueous solution

MRS Advances ◽  
2016 ◽  
Vol 1 (53) ◽  
pp. 3607-3612 ◽  
Author(s):  
Imed Ghiloufi ◽  
Jaber El Ghoul ◽  
Abueliz Modwi ◽  
Lassaad El Mir
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Heavy Metal ◽  
Zinc Oxide ◽  
Metal Removal ◽  
Sol Gel ◽  
Heavy Metal Removal ◽  
Nano Zinc Oxide ◽  
Calcium Doped ◽  
Nano Zinc

ABSTRACTNano zinc oxide (ZnO) and Calcium doped zinc oxide (CZ) nanopowders were synthesized by sol–gel method from zinc acetate di-hydrate and an adequate quantity of calcium chloride hexa-hydrate. Calcium doped zinc oxide (CZ) were prepared at different Ca concentrations from 1 wt% (CZ1) to 5 wt% (CZ5). The obtained nanopowders were characterized by transmission electron microscopy and X-ray diffraction. The objective of this work is to find a new and highly efficient nanomaterial for the adsorption of heavy metals from waste water. For this reason, the nanopowders were used to uptake heavy metals (Cr, Cd, and Ni) from aqueous solution. The obtained results show that the incorporation of Ca in nanoparticles zinc oxide (ZnO) increases the capacity adsorption of nanopowders and CZ3 is more efficient than the other Ca-doped samples. In this work we studied also the effect of pH and the pyrolysis temperature of the nanopowders on the removal of heavy metal ions from aqueous solution by CZ3.

The Research Progress on New Adsorbent of Dealing with Heavy Metal Pollution in Water

2014 ◽  
Vol 1065-1069 ◽  
pp. 1969-1972
Author(s):  
Lin Zhu ◽  
Mei Na Liang ◽  
Dao Lin Huang
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Activated Carbon ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Industrial Waste ◽  
Research Progress ◽  
Absorbent Material ◽  
The Future ◽  
Adsorbent Materials

With the increasing of industrialization, the heavy metals cause serious pollution of water in China. This paper reviewed the study of many kinds of new adsorbent materials remove heavy metal from pollution water, these new adsorbent including modification activated carbon, inorganic absorbent material, industrial waste, biological adsorbents and synthetic adsorbent, and pointed out the trend of development of the new adsorbent material application in the future.

scholarly journals Effective Factor Analysis for Chromium(VI) Removal from Aqueous Solutions and Its Application to Tunçbilek Lignite Using Design of Experiments

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Âli Yurdun Orbak ◽  
İlkün Orbak
Keyword(s):  
Heavy Metals ◽  
Activated Carbon ◽  
Design Of Experiments ◽  
Aqueous Solutions ◽  
Textile Industry ◽  
Chemical Engineering ◽  
Chemical Precipitation ◽  
Physical Activation ◽  
Factors Affecting ◽  
Chromium Vi

Poisonous heavy metals in air, water, and soil produce global environmental problems that are considerable threats to humankind. To meet the local and international guidelines for heavy metal release, companies often use different approaches, such as chemical precipitation, chelating agents, or activated carbon produced by adsorption. One of these heavy and toxic metals is chromium(VI). Chromium(VI) is commonly used in many applications, such as dye fixation in the textile industry or as an anticorrosive agent in paints. The aim of this paper is to explore the factors affecting the removal of one of these deadly heavy metals, chromium(VI), from aqueous solutions. For this purpose, activated carbon from Turkish Tunçbilek lignite is prepared with both chemical and physical activation methods to investigate the adsorption behavior of chromium(VI). The effects of initial chromium(VI) concentration, adsorption temperature, and pH on adsorption are studied using a design of experiments method with a full 24 factorial design with center points. The Freundlich and Langmuir adsorption isotherms that are commonly used in chemical engineering are also applied both for predicting the amount of chromium(VI) adsorbed and confirming the validity and advantages of the obtained regression model. The results indicate that the design of experiments and regression can explain and support the design of new materials by using linear and physically meaningful equations instead of local nonlinear and empirical models that are usually insufficient. Additionally, three experiments were carried out in the liquid phase to test the activated carbon samples: chromium, chromium and sucrose, and chromium-sucrose-ion. A change in adsorption capacities of the activated carbon samples was observed. Sucrose was chosen for the experiments because it contains six carbon atoms in a slightly soluble structure. The results indicated that Tunçbilek lignite exhibits good adsorption capability.

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