Effects of operating conditions on the removal of heavy metals by zeolite in fixed bed reactors

2004 ◽  
Vol 112 (1-2) ◽  
pp. 37-43 ◽  
Author(s):  
V.J. Inglezakis ◽  
Helen Grigoropoulou
Keyword(s):  
Heavy Metals ◽  
Fixed Bed ◽  
Operating Conditions ◽  
Fixed Bed Reactors ◽  
Removal Of Heavy Metals

Tertiary Nitrification Pilot Plants on Parisian Waste Water

1990 ◽  
Vol 22 (1-2) ◽  
pp. 347-352 ◽  
Author(s):  
C. Paffoni ◽  
B. Védry ◽  
M. Gousailles
Keyword(s):  
Waste Water ◽  
Metropolitan Area ◽  
Fixed Bed ◽  
Point Of View ◽  
Operating Conditions ◽  
Research Center ◽  
Daily Output ◽  
Practical Point ◽  
Fixed Bed Reactors

The Paris Metropolitan area, which contains over eight million inhabitants, has a daily output of about 3 M cu.meters of wastewater, the purification of which is achieved by SIAAP (Paris Metropolitan Area Sewage Service) in both Achères and Valenton plants. The carbon pollution is eliminated from over 2 M cu.m/day at Achères. In order to improve the quality of output water, its tertiary nitrification in fixed-bed reactors has been contemplated. The BIOFOR (Degremont) and BIOCARBONE (OTV) processes could be tested in semi-industrial pilot reactors at the CRITER research center of SIAAP. At a reference temperature of 13°C, the removed load is approximately 0.5 kg N NH4/m3.day. From a practical point of view, it may be asserted that in such operating conditions as should be at the Achères plant, one cubic meter of filter can handle the tertiary nitification of one cubic meter of purified water per hour at an effluent temperature of 13°C.

Modeling of transport phenomena in fixed-bed reactors for the Fischer-Tropsch reaction: a brief literature review

2017 ◽  
Vol 33 (2) ◽  
Author(s):  
José R.G. Sánchez-López ◽  
Angel Martínez-Hernández ◽  
Aracely Hernández-Ramírez
Keyword(s):  
Liquid Fuel ◽  
Transport Phenomena ◽  
Fixed Bed ◽  
Reaction System ◽  
Operating Conditions ◽  
Fixed Bed Reactor ◽  
Fuel Production ◽  
Fischer Tropsch ◽  
Fixed Bed Reactors ◽  
The Impact

AbstractCurrently, few processes can be considered practical alternatives to the use of petroleum for liquid fuel production. Among these alternatives, the Fischer-Tropsch synthesis (FTS) reaction has been successfully applied commercially. Nevertheless, many of the fundamentals of this process are difficult to understand because of its complexity, which depends strongly on the catalyst and the reactor design and operating conditions, as the reaction is seriously affected by mass and heat transport issues. Thus, studying this reaction system with transport phenomena models can help to elucidate the impact of different parameters on the reaction. According to the literature, modeling FTS systems with 1D models provides valuable information for understanding the phenomena that occur during this process. However, 2D models must be used to simulate the reactor to correctly predict the reactor variables, particularly the temperature, which is a critical parameter to achieve a suitable distribution of products during the reaction. Thus, this work provides a general resume of the current findings on the modeling of transport phenomena on a particle/pellet level in a tubular fixed-bed reactor.

Preparation of Nanometer Titanium Dioxide Adsorbent and its Application in Industrial Wastewater Treatment

2012 ◽  
Vol 573-574 ◽  
pp. 521-525
Author(s):  
Nan Zhang ◽  
Pu Liu ◽  
Ben Quan Fu ◽  
Li Na Wang
Keyword(s):  
Heavy Metals ◽  
Titanium Dioxide ◽  
Wastewater Treatment ◽  
Hydrochloric Acid ◽  
Surface Area ◽  
Industrial Wastewater ◽  
Operating Conditions ◽  
Adsorption Condition ◽  
Removal Of Heavy Metals ◽  
Nanometer Titanium Dioxide

In this paper, nanometer titanium dioxide was synthesized by a simple reaction. The prepared adsorbent was characterized by surface area and porosimetry analyzer and it was used for the removal of heave metals in industrial wastewater. The main parameters affecting the adsorption of heavy metals including pH, adsorption condition and elution condition have been investigated in detail. Under the optimized operating conditions, most of the target heavy metals could be fast removed. The adsorbent could be simply regenerated by hydrochloric acid. Thus, the prepared nanometer titanium dioxide was an adsorbent which is suitable for the removal of heavy metals in industrial wastewater.

Scientific Insights Into Modified and Non-Modified Biomaterials for Sorption of Heavy Metals From Water

2020 ◽  
pp. 807-827
Author(s):  
Tawfik A. Saleh ◽  
Salawu Omobayo Adio ◽  
Prakash Parthasarathy ◽  
Gaddafi I. Danmaliki
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Environmentally Friendly ◽  
Operating Conditions ◽  
Highly Efficient ◽  
Factors Influencing ◽  
Removal Of Heavy Metals ◽  
Near Future

Adsorption techniques are widely used for the removal of various classes of pollutants from water due to their mild and facile operating conditions. The operations involved in the adsorption techniques are environmentally friendly, economical, highly selective on pollutants, highly efficient and easily operative. However, the adsorption of heavy metals from water using biomaterials (biosorption) is a relatively new and interesting technique which holds a great potential. Its effectiveness in lowering the heavy metals concentration to sub-ppb levels is appealing and has attracted increasing attention. The technique is believed to replace the existing technologies in the near future. This chapter discusses the prospects of biomaterials in the removal of heavy metals from waste water, the modification techniques that can enhance biosorption efficiency, and the factors influencing the biosorption processes.

Scientific Insights Into Modified and Non-Modified Biomaterials for Sorption of Heavy Metals From Water

2017 ◽  
pp. 13-39
Author(s):  
Tawfik A. Saleh ◽  
Salawu Omobayo Adio ◽  
Prakash Parthasarathy ◽  
Gaddafi I. Danmaliki
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Environmentally Friendly ◽  
Operating Conditions ◽  
Highly Efficient ◽  
Factors Influencing ◽  
Removal Of Heavy Metals ◽  
Near Future

Adsorption techniques are widely used for the removal of various classes of pollutants from water due to their mild and facile operating conditions. The operations involved in the adsorption techniques are environmentally friendly, economical, highly selective on pollutants, highly efficient and easily operative. However, the adsorption of heavy metals from water using biomaterials (biosorption) is a relatively new and interesting technique which holds a great potential. Its effectiveness in lowering the heavy metals concentration to sub-ppb levels is appealing and has attracted increasing attention. The technique is believed to replace the existing technologies in the near future. This chapter discusses the prospects of biomaterials in the removal of heavy metals from waste water, the modification techniques that can enhance biosorption efficiency, and the factors influencing the biosorption processes.

Removal of heavy metals from industrial waste solutions by a rotating fixed bed of ion exchange resin

2017 ◽  
Vol 100 ◽  
pp. 178-184 ◽  
Author(s):  
M.A. Hagag ◽  
D.A. El-Gayar ◽  
S.A. Nosier ◽  
A.A. Mubark
Keyword(s):  
Heavy Metals ◽  
Ion Exchange ◽  
Industrial Waste ◽  
Exchange Resin ◽  
Fixed Bed ◽  
Ion Exchange Resin ◽  
Removal Of Heavy Metals
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