Efficiency of the Single and Dual Media Filters for the Removal of Heavy Metal Ions from Water in Ekbatan and Shahid Beheshti Water Treatment Plants in city of Hamedan

2020 ◽  
Vol 42 (2) ◽  
pp. 200-207
Author(s):  
Masoud Azizi ◽  
Soheil Sobhanardakani
Keyword(s):  
Heavy Metal ◽  
Water Treatment ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Water Treatment Plants

Research Progress in Removing Heavy Metals from Waste Water via Bio-Sorption

2014 ◽  
Vol 587-589 ◽  
pp. 692-695
Author(s):  
Wei Sun
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Water Treatment ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Waste Water Treatment ◽  
Research Progress ◽  
Traditional Methods ◽  
Sorption Method

Bio-absorption has an unparalleled advantage over other traditional methods in removing and recycling heavy metal ions from waste water. Consequently, it has a promising future. In this paper, the traditional methods and the bio-sorption method via which heavy metals are removed from waste water are compared to summarize the mechanism of bio-sorption, the types of bio-sorbent, the factors that can influence bio-sorption and the state of its application in waste water treatment .

Recent Advances in Water Treatment Using Graphene-based Materials

2020 ◽  
Vol 17 (1) ◽  
pp. 74-90 ◽  
Author(s):  
Nader Ghaffari Khaligh ◽  
Mohd Rafie Johan
Keyword(s):  
Heavy Metal ◽  
Water Treatment ◽  
Ion Exchange ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Membrane Filtration ◽  
Chemical Precipitation ◽  
High Specific Surface Area ◽  
Adsorption Parameters

: A variety of processes were reported for efficient removing of heavy metal from wastewater, including but not limited to ion exchange, reverse osmosis, membrane filtration, flotation, coagulation, chemical precipitation, solvent extraction, electrochemical treatments, evaporation, oxidation, adsorption, and biosorption. Among the aforementioned techniques, adsorption/ion exchange has been known as a most important method for removing heavy metal ions and organic pollutants due to great removal performance, simple and easy process, cost-effectiveness and the considerable choice of adsorbent materials. : Nanotechnology and its applications have been developed in most branches of science and technology. Extensive studies have been conducted to remove heavy metal ions from wastewater by preparation and applications of various nanomaterials. Nanomaterials offer advantages in comparison to other materials including an extremely high specific surface area, low-temperature modification, short intraparticle diffusion distance, numerous associated sorption sites, tunable surface chemistry, and pore size. In order to evaluate an adsorbent, two key parameters are: the adsorption capacity and the desorption property. The adsorption parameters including the absorbent loading, pH and temperature, concentration of heavy metal ion, ionic strength, and competition among metal ions are often studied and optimized. : Several reviews have been published on the application of Graphene (G), Graphene Oxide (GO) in water treatment. In this minireview, we attempted to summarize the recent research advances in water treatment and remediation process by graphene-based materials and provide intensive knowledge of the removal of pollutants in batch and flow systems. Finally, future applicability perspectives are offered to encourage more interesting developments in this promising field. This minireview does not include patent literature.

scholarly journals Fabrication ofγ-Fe2O3Nanoparticles by Solid-State Thermolysis of a Metal-Organic Framework, MIL-100(Fe), for Heavy Metal Ions Removal

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Shengtao Hei ◽  
Yan Jin ◽  
Fumin Zhang
Keyword(s):  
Heavy Metal ◽  
Water Treatment ◽  
Solid State ◽  
Metal Ions ◽  
Photoelectron Spectroscopy ◽  
Heavy Metal Ions ◽  
X Ray ◽  
Metal Organic ◽  
Heavy Metal Ions Removal ◽  
Metal Ions Removal

Porousγ-Fe2O3nanoparticles were prepared via a solid-state conversion process of a mesoporous iron(III) carboxylate crystal, MIL-100(Fe). First, the MIL-100(Fe) crystal that served as the template of the metal oxide was synthesized by a low-temperature (<100°C) synthesis route. Subsequently, the porousγ-Fe2O3nanoparticles were fabricated by facile thermolysis of the MIL-100(Fe) powders via a two-step calcination treatment. The obtainedγ-Fe2O3was characterized by X-ray diffraction (XRD), N2adsorption, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) techniques, and then used as an adsorbent for heavy metal ions removal in water treatment. This study illustrates that the metal-organic frameworks may be suitable precursors for the fabrication of metal oxides nanomaterials with large specific surface area, and the prepared porousγ-Fe2O3exhibits a superior adsorption performance for As(V) and As(III) ions removal in water treatment.

Imprinted photonic hydrogel pillar for self-reporting water treatment of heavy metal ions

RSC Advances ◽  
2015 ◽  
Vol 5 (118) ◽  
pp. 97604-97610 ◽  
Author(s):  
Yang Yan ◽  
Meng Yin ◽  
Wei Hong ◽  
Zhou Xu ◽  
Xiao-Bin Hu
Keyword(s):  
Heavy Metal ◽  
Water Treatment ◽  
Photonic Crystals ◽  
Metal Ions ◽  
Heavy Metal Ions

In this work we synthesized a self-reporting water absorbent for heavy metal ions by assembling photonic crystals (PC) with imprinted hydrogel pillars.

Designed hierarchical MnO2 microspheres assembled from nanofilms for removal of heavy metal ions

RSC Advances ◽  
2014 ◽  
Vol 4 (27) ◽  
pp. 14048-14054 ◽  
Author(s):  
Yuanyuan Guo ◽  
Hong Guo ◽  
Yapeng Wang ◽  
Lixiang Liu ◽  
Weiwei Chen
Keyword(s):  
Thin Film ◽  
Heavy Metal ◽  
Water Treatment ◽  
Metal Ions ◽  
Removal Efficiency ◽  
Heavy Metal Ions

Hierarchical MnO2 microspheres assembled by nano thin film are fabricated through an environmental route with subsequent drying under vacuum, and exhibit remarkable removal efficiency of heavy metal ions in water treatment.

scholarly journals Development of High-Efficient, Resource-Saving Technical Solutions for Wastewater Treatment in Galvanochemical Sector

2020 ◽  
Author(s):  
A. V. Kolesnikov ◽  
T. V. Davydkova ◽  
V. A. Kolesnikov
Keyword(s):  
Heavy Metal ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Resource Saving ◽  
Machine Shop ◽  
Organic Components ◽  
High Efficient ◽  
Technical Solutions

This article presents the results of the analysis of samples of a machine-shop for the content of organic components and heavy metal ions. The proposed modernized technological scheme uses modern technological solutions for a machine-shop. Based on the analysis of sites and sewage treatment plants of galvanic production, as well as analysis of the presence of polluting components, technical solutions, which are going to increase the intensification and efficiency of water treatment and water treatment through the use of modern physical and chemical methods, technological methods and wastewater treatment devices have been developed. The introduction of additional sorption modules with activated carbon will reduce the ingress of toxic organic components (DBP, aniline, solvents: acetone, gasoline, ethyl acetate, polymer epoxy compounds, including: epoxy adhesives, polymer filler, epoxy-phenolic, phenolic-rubber and rubber adhesives, release adhesives) into wastewater. A modernized scheme using modern solutions will comply with Mosvodokanal standards. Keywords: wastewater, water treatment, toxic organic components, heavy metal ions

Advanced Water Treatment Systems and Their Applications

2019 ◽  
pp. 1-18
Author(s):  
Tauseef Ahmad Rangreez ◽  
Rizwana Mobin ◽  
Hamida-Tun-Nisa Chisti ◽  
Rafia Bashir ◽  
Tabassum Ara
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Composite Material ◽  
Water Treatment ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Toxic Heavy Metal ◽  
Health And Wellbeing ◽  
Cation Exchangers ◽  
Inorganic Composite

The chapter gives an idea about water as a life-sustaining medium and the sources of its pollution along with the deteriorating effects of over burdening of natural resources and the effect of various heavy metal ions discharged into the water bodies on human health and wellbeing. Several human diseases and disorders that are caused due to intake of water polluted by toxic heavy metal ions are also listed. The need and urgency in determination and removal of heavy metal ions from the water sources in order to release load on aquifers by making water safe for reuse is emphasized. The procedure and advantages of composite cation-exchangers along with the work carried out in the field to develop various lead, cadmium, chromium, and mercury selective cation-exchangers are also included. The utility of organic-inorganic composite material for the detection of heavy metals, which render portable water unsafe for use and pose a threat to the wellbeing of man, is also discussed.

scholarly journals STUDY OF THE EFFICIENCY OF WATER PURIFICATION FROM HEAVY METAL IONS WITH MAGNETITE SORBENTS

2020 ◽  
pp. 46-51
Author(s):  
I.M. Trus ◽  
M.D. Gomelia ◽  
T.V. Krysenko ◽  
Ye.S. Bulhakov
Keyword(s):  
Heavy Metal ◽  
Water Treatment ◽  
Metal Ions ◽  
Sorption Capacity ◽  
Water Purification ◽  
Heavy Metal Ions ◽  
Sodium Sulfide ◽  
Partial Hydrolysis ◽  
High Degree ◽  
Hydrolysis Of

The process of water treatment from heavy metal ions on sorbents with magnetic properties was investigated. Samples of magnetite obtained at a ratio of the concentrations of iron (II) ions and iron (III) 1 : 2; 1 : 1 and 2 : 1, and samples modified with sodium sulfide were used. The effect of pH on the sorption efficiency of heavy metal ions on magnetite was studied. It was shown that the sorption capacity of magnetite towards heavy metal ions, as well as the efficiency of water treatment from these compounds, increases with an increase of the [Fe2+]/[Fe3+] ratio from 1 : 2 to 2 : 1. Sorption capacity of magnetite increases with increasing pH due to partial hydrolysis of heavy metal ions. Also sorption capacity of magnetite increases significantly if modified it with guanidine, thiosemicarbazide, and sodium sulfide. At the same time, the sorbent provides a high degree of water purification from heavy metal ions while reducing the metal concentrations to several µg/dm3. Ref. 12, Fig. 5, Tab. 1.

scholarly journals Waste Water Treatment in Terms of Purification from Copper with Natural and Modified Montmorillonits

2011 ◽  
pp. 58-65
Author(s):  
Keyword(s):  
Waste Water ◽  
Heavy Metal ◽  
Water Treatment ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Waste Water Treatment ◽  
Ferrous Metal ◽  
Water Bodies ◽  
Waste Waters ◽  
Sorption Characteristics

Regularity of heavy metal ions isolation from waste waters with modified montmorillonit hydrosoles has been studied. The agents’ sorption characteristics have been investigated. The possibility of heavy non-ferrous metal ions isolation up to the current norms of permissible discharge to water bodies has been demonstrated.

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