Zein/EDTA/chlorophyll/nano-clay Biocomposite Sorbent: Investigation Physicochemical Properties Sorbent and Its Ability to Remove Contaminants of Industrial Wastewater

2021 ◽  
Author(s):  
Farrokh Asadzadeh ◽  
Sajad Pirsa
Keyword(s):  
Physicochemical Properties ◽  
Industrial Wastewater ◽  
Nano Clay

scholarly journals The Alternative Method of Conditioning Industrial Wastewater Containing Heavy Metals Based on the Hydrothermodynamic Cavitation Technology

2020 ◽  
pp. 991-1001
Author(s):  
Olga G. Dubrovskaya ◽  
Vladimir A. Kulagin ◽  
Yao Limin
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Mathematical Modelling ◽  
Physicochemical Properties ◽  
Industrial Wastewater ◽  
Heavy Metal Ions ◽  
Industrial Effluent ◽  
Process Equipment ◽  
Optimal Parameters ◽  
Physicochemical Changes

This article provides the results of studies of modifying the physicochemical properties of industrial wastewater when treated in a cavitation reactor. The authors performed an analysis of physicochemical changes in the makeup of industrial effluent and defined the efficiency of reducing the content of heavy metal ions under various modes of hydrothermodynamic action. The article also proposes the methods of mathematical modelling for determining the optimal parameters of cavitation treatment of wastewater and reveals the advantages of upgrading the wastewater process equipment with the inclusion of a unit of SC-reactors

Zein/EDTA/chlorophyll/nano-clayBiocomposite Sorbent; Studying Physicochemical Properties and Ability to Remove Industrial Wastewater Contaminants

2021 ◽  
Author(s):  
Farrokh Asadzadeh ◽  
sajad pirsa
Keyword(s):  
Tensile Strength ◽  
Wastewater Treatment ◽  
Physicochemical Properties ◽  
Industrial Wastewater ◽  
Electrostatic Interactions ◽  
Water Solubility ◽  
Nitrate Removal ◽  
Water Hardness ◽  
Good Effect ◽  
Total Hardness

Abstract In this study, a composite biosorbent of zein/ethylene diamine tetraacetic acid /chlorophyll/nano-clay (Ze/EDTA/Chl/Clay) was prepared. Thickness, mechanical properties (tensile strength and strength to breaking point), ability to reduce water hardness, water solubility, water absorption, antioxidant activity and moisture content of prepared biosorbent were studied. SEM, FTIR, XRD and TGA techniques were used to investigate the physicochemical properties and structure of the prepared biosorbent. Optimal biosorbent was selected using statistical methods and used to remove chemical contaminants from industrial wastewater in Urmia (Iran). For this purpose, total heavy metals (THM), total hardness, nitrate, nitrite, COD and BOD, TDS and salinity of industrial wastewater before and after biosorbent treatment were investigated. The results confirmed the homogeneous and cohesive structure of different zein adsorbents. FTIR results showed physical and electrostatic interactions between composite components. Nanoclay increased the thermal stability of the biosorbent. Chlorophyll and EDTA increased the biosorbent ability to absorb water and reduce the total hardness of the water. Clay nanoparticles increased the tensile strength of the biosorbent and chlorophyll and EDTA increased the biosorbent ductility. Under optimal wastewater treatment conditions, Ze/EDTA/Chl/Clay biosorbent was recognized as the best adsorbent. The use of ultrasound in wastewater treatment had a good effect. Under optimal conditions, 57.5% of THM and 67% of nitrate were removed from the wastewater. By comparing the ability of chlorophyll-containing biosorbents (Ze/Chl and Ze/EDTA/Chl/Clay) to remove nitrite and nitrate, it was found that these biosorbents have a very high selectivity in nitrate removal compared to nitrite.

Ozonation in water treatment: the generation, basic properties of ozone and its practical application

2017 ◽  
Vol 33 (1) ◽  
Author(s):  
Chaohai Wei ◽  
Fengzhen Zhang ◽  
Yun Hu ◽  
Chunhua Feng ◽  
Haizhen Wu
Keyword(s):  
Water Treatment ◽  
Oxygen Atom ◽  
Physicochemical Properties ◽  
Industrial Wastewater ◽  
Municipal Wastewater ◽  
Chemical Reactivity ◽  
Photochemical Reactions ◽  
Side Reactions ◽  
Ozone Generation ◽  
Heterogeneous Catalytic

AbstractThe widespread applications of ozone technologies are established on the basis of large-scale manufacture of ozone generator and chemical reactivity of ozone. It is hence necessary to summarize the principles of ozone generation and to analyze the physicochemical properties of ozone, which are of fundamental significance to indicate its technical developments and practical applications. This review presents a summary concerning ozone generation mechanisms, the physicochemical properties of ozone, as well as the applications of ozone in water treatment. Ozone can be produced by phosphorus contact, silent discharge, photochemical reactions, and electrochemical reactions, principally proceeding by the reaction of oxygen atom with oxygen molecule. There are side reactions to the generation of ozone, however, which are responsible for ozone depletion including thermal decomposition and quenching reactions by reactive species. The solubility of ozone in water is much higher than that of oxygen, suggesting that it may be reliably applied in water and wastewater treatment. Based on the resonance structures of ozone, one oxygen atom in ozone molecule is electron-deficient displaying electrophilic property, whereas one oxygen atom is electron-rich holding nucleophilic property. The superior chemical reactivity of ozone can also be indirectly revealed by radical-mediated reactions initiated from homogenous and heterogeneous catalytic decomposition of ozone. Owing to the reliable generation of ozone and its robust reactive properties, it is worthy to thoroughly elaborate the applications of ozone reaction in drinking water disinfection and pre- or post-treatment of industrial wastewater including cyanide wastewater, coking wastewater, dyeing wastewater, and municipal wastewater. The structural characteristics of ozone reactors and energy requirement of applied technologies are evaluated. In addition, future directions concerning the development of ozone generation, ozone reactivity, and industrial wastewater ozonation have been proposed.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

Studies on the Degradation of Human Fibrinogen by Plasmin and Trypsin

1966 ◽  
Vol 16 (03/04) ◽  
pp. 526-540 ◽  
Author(s):  
E. A Beck ◽  
D. P Jackson
Keyword(s):  
Physicochemical Properties ◽  
Electrophoretic Mobility ◽  
Rapid Loss ◽  
Clotting System ◽  
Human Fibrinogen ◽  
Peptide Bonds ◽  
Physico Chemical ◽  
Starch Gel ◽  
Ph Stat ◽  
Rapid Appearance

SummaryThe effects of trypsin and plasmin on the functional and physicochemical properties of purified human fibrinogen were observed at various stages of proteolysis. Concentrations of plasmin and trypsin that produced fibrinogenolysis at comparable rates as measured in a pH stat produced, at similar rates, loss of precipitability of fibrinogen by heat and ammonium sulphate and alterations in electrophoretic mobility on starch gel. Trypsin produced a more rapid loss of clottability of fibrinogen and a more rapid appearance of inhibitors of the thrombin-fibrinogen clotting system than did plasmin. Consistent differences were noted between the effects of trypsin and plasmin on the immunoelectrophoretic properties of fibrinogen during the early stages of proteolysis.These results are consistent with the hypothesis that trypsin initially reacts with the same peptide bonds of fibrinogen that are split by thrombin, but these same bonds do not appear to be split initially by plasmin. Measurement of the various functional and physico-chemical changes produced by the action of trypsin and plasmin on fibrinogen can be used to recognize various stages of proteolysis.

RESEARCH AND EVALUATE TREATMENT EFFICIENCY ON TAPIOCA PROCESSING INDUSTRIAL WASTEWATER BY AEROBIC BIOFILTER TECHNOLOGY WITH VARIOUS MATERIALS

2010 ◽  
Vol 13 (3) ◽  
pp. 54-66
Author(s):  
Phuong Thi Thanh Nguyen ◽  
Phuoc Van Nguyen ◽  
Anh Cam Thieu
Keyword(s):  
Wastewater Treatment ◽  
Industrial Wastewater ◽  
Utilization Rate ◽  
Organic Loading ◽  
Treatment Efficiency ◽  
Research Results ◽  
Loading Rates

This study was performed to evaluate the efficiency of tapioca processing wastewater treatment using aerobic biofilter with variety of biofilter media: coir, coal, PVC plastic and Bio - Ball BB15 plastic. Research results in the lab demonstrated all four aerobic biofilter models processed can treated completely N and COD which COD reached 90-98% and N reached 61-92%, respectively, at the organic loading rates in range of 0.5, 1, 1.5 and 2 kgCOD/m3.day. The results identified coir filter was the best in four researched materials with removal COD and specific substract utilization rate can reach 98%, and 0.6 kg COD/kgVSS.day. Research results open the new prospects for the application of the cheap materials, available for wastewater treatment.

Sign in / Sign up

Export Citation Format

Share Document