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 .

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.

Research Progress of Adsorption on Heavy Metals from Aqueous Solutions by Modified Diatomite

2016 ◽  
Vol 697 ◽  
pp. 766-770 ◽  
Author(s):  
Hao Li ◽  
Qing Lin Xie ◽  
Nan Chun Chen ◽  
Hui Xu ◽  
Li Li Ma
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Specific Area ◽  
Absorption Efficiency ◽  
Research Progress ◽  
High Porosity ◽  
Metallic Oxide ◽  
Proper Modification

Pollution of heavy metals has become a serious environmental problem and it needs to be solved as soon as possible. Diatomite is a kind of biogenic rock and it is siliceous and sedimentary. There is abundant diatomite resource in China. Diatomite has distinctive structure of diatom monoblock. It has strong adsorbability, its specific area is large and it has high porosity. Its surface adheres a lot of active groups and negative charge. Diatomite with proper modification would show outstanding absorption effect of heavy metal ions. This paper reviewed the absorption efficiency of heavy metal ions on diatomite modified by metallic oxide, acids and bases, acticarbon, calcium carbonate and organics, the results would offer references for related researches. At last, this paper takes the outlook for the modified methods and application prospects of diatomite in wastewater treatment of heavy metals.

scholarly journals Production of activated carbon from poultry feathers for waste water treatment

2019 ◽  
Vol 80 (8) ◽  
pp. 1407-1412 ◽  
Author(s):  
Rue Chiramba ◽  
Gratitude Charis ◽  
Nonhlanhla Fungura ◽  
Gwiranai Danha ◽  
Tirivaviri Mamvura
Keyword(s):  
Waste Water ◽  
Heavy Metal ◽  
Activated Carbon ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Ph Value ◽  
Waste Water Treatment ◽  
Limiting Factors ◽  
Poultry Feathers

Abstract Contamination of water bodies by heavy metal ions is a challenge many developing nations like Zimbabwe face, with negative environmental and socio-economic repercussions. Treating affected bodies usually requires a costly consignment of chemicals and activated carbon. This research investigates the possible use of an abundant waste resource – poultry feathers – to make activated carbon for heavy metal ion removal. Poultry consumption in this nation generates more than five million tonnes of feathers a year, with very few uses of this by-product. This research was carried out to evaluate the effectiveness of activated carbon synthesized from poultry feathers with sodium hydroxide as the activating agent. It was tested for removing heavy metal ions from waste water at Lake Chivero and the experimental work done showed that it had a removal efficiency as high as 97%, with a high affinity for lead ions as compared with chromium ions. Upon characterization, the activated carbon showed an iodine number of 520 mg and it worked best at a pH value of 8. The efficiency removal also increased with increasing adsorbent concentration as well as contact time up to a period where these factors ceased to be the limiting factors of the reaction.

Alkali-treated coir fibre-pith composite for waste water treatment

2021 ◽  
pp. 152808372110142
Author(s):  
Monnisha Ganesan ◽  
Gobi Nallathambi
Keyword(s):  
Waste Water ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Alkali Treatment ◽  
Waste Water Treatment ◽  
Emission Spectrometry ◽  
Crystalline Cellulose ◽  
Coir Pith ◽  
Coir Fibre

Coir fibre and pith are eco-friendly material used in the preparation of composites. Coir fibre and coir pith were treated with sodium hydroxide to study the effect of alkali for prolonged exposure on its properties. Fibre and pith were treated with different concentrations of NaOH from 5% to 30% for 24 hours at room temperature. Alkali treatment removes the impurities and the expose the crystalline cellulose and to enhance the surface properties. The alkali-treated coir fibre and pith were characterized by Scanning electron microscopy for morphology, X-ray diffraction for crystallinity index, thermogravimetry for thermal stability, Fourier-transform infrared spectroscopy for structural changes. The chemical composition was analysed for both fibre and pith. Physical properties such as bulk density, particle density and porosity were determined for pith. After alkali treatment, the properties (physical and chemical) of the treated fibre (5% to 20%) has been enhanced. For coir pith the properties has been diminished. Untreated/treated coir fibre/pith filter (CFP) were developed to study the removal of heavy metal ions from the waste water, where untreated (CFP) as a control. The removal efficiency of the developed CFP filter for heavy metal ions were determined by Inductively coupled plasma - optical emission spectrometry (ICP-OES). 5% CFP filter exhibited higher efficiency for removal of heavy metal ions.

scholarly journals Inhibition of Activated Sludge Respiration by Heavy Metals

2020 ◽  
Vol 14 ◽  
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Water Treatment ◽  
Activated Sludge ◽  
Waste Water Treatment ◽  
Domestic Waste ◽  
Heavy Metal Concentrations ◽  
Water Treatment Plants ◽  
Different Types

Inhibition of the respiration microbial activity in the activated sludge caused by heavy metal concentrations (Cr, Cd, Cu and Ni) was studied by means of respirometric method using Strathtox respirometer (Strathkelvin Glasgow).The studied sludge samples were obtained from the two waste water treatment plants with different types of pollution (municipal waste water and domestic waste water)

scholarly journals Use of Column for the adsorption of Ni(II) and Cu(II) from aqueous solution using Acasia arabica tree bark substrate

2020 ◽  
pp. 1-5
Author(s):  
Gharde A. D. ◽  
Gharde B. D.
Keyword(s):  
Waste Water ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Industrial Development ◽  
Waste Water Treatment ◽  
Green Revolution ◽  
Aquatic Organisms ◽  
Tree Bark ◽  
Aquatic Life

Salt of various heavy metals and other potentially dangerous are being discharged into the aquatic environment. Water containing vital concentration of some of heavy metal ions are harmful to human being, animal as well as aquatic organisms. The toxicity of some heavy metal ions, even at the trace level has been recognised with respect to the public health for many years. Metals such as Mercury, Lead, Cadmium, Copper and Chromium are under this category. Many metals have been evaluated as harmful to aquatic life above certain toxicity level. Any type of pollution brings about noticeable changes in the physiochemical parameters of the water, therby making it unsuitable for some beneficial uses. Thus, pollution causes changes in almost in the parameter. When increasing the pace of industrialisation along with population explosion, urbanisation and green revolution are reflected in varying degree of purity of water, soil and air. Majority of industries are water based and considerable volume of waste water is discharged to the environment either untreated or inadequately treated leading to the problem of surface and ground water pollution. The capital cost and operating waste water treatment system are rising on one hand and on the other there is a pressing demand for the treatment of waste water generated by increase residential and industrial development.

Study of Carbon Fiber Materials Sorption Capacity to Remove Heavy Metal Ions and Oil Products from Wastewater during its Treatment

2017 ◽  
Vol 265 ◽  
pp. 272-278
Author(s):  
A.I. Syutova ◽  
S.Ya. Alibekov ◽  
N.P. Syutov
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Carbon Fiber ◽  
Metal Ions ◽  
Sorption Capacity ◽  
Biological Treatment ◽  
Heavy Metal Ions ◽  
Oil Products ◽  
Sorption Method ◽  
Fiber Materials

The article highlights the results of a study of the sorption capacity of some types of carbon fiber materials (CFM) with respect to the ions of heavy metals and oil products. A sorption method for the wastewater treatment, which allows cleaning the wastewater from oil products, ions of heavy metals, and other pollutants to the MPC, was suggested, and some recommendations for the implementation of the method were given. It was found that the use of CFMs for the sorption of heavy metal ions and oil products was more effective than that of some other known sorbents. The regeneration possibility of CFM, simplicity, and variability provide for a number of advantages compared to other known methods. The suggested method can be implemented both as a standalone and in conjunction with other methods to improve the biological treatment of wastewater.

scholarly journals An approach to remove heavy met al ions in certain aqueous solutions and waste water by means of suit able matrices and chelators

2019 ◽  
pp. 257-262
Author(s):  
Göran Lindgren
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Human Body ◽  
Trace Analysis ◽  
Heavy Metal Ions ◽  
High Flow ◽  
Flow Rates

The increasing amount of heavy metal ions in nature might not yet be a serious problem,However some of the heavy metals Le_ cadmium, mercury, arsenate (semi-metal) and highconcentrations of copper and zinc are clearly toxic to the human body,The present investigation deals with removal of heavy metal ions in aqueous solution, Differentcarriers designed for trace analysis as well as for high flow rates will be discussed,

scholarly journals Graft Copolymerization Of Acrylic Acid Onto Fatty Chitosan: Synthesis, Characterization and Waste Water Treatment

2021 ◽  
Author(s):  
shimaa fawzy Hamza ◽  
Maha mohammed El-Sawy ◽  
noha abdelfattah Alian ◽  
nihal omar shaker
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Water Treatment ◽  
Thermogravimetric Analysis ◽  
Acrylic Acid ◽  
Metal Ions ◽  
Waste Water Treatment ◽  
Ceric Ammonium Nitrate ◽  
Chitosan Derivatives ◽  
Ft Ir

Abstract Enviroment is worsening day by day due to industrial pollution, with hazardous chemicals contributing to the accumulation of heavy metal contaminants in waste water. Waste water polluted by these effluents disrupts the usual use of water for irrigation and marine life. The purity and efficiency of water is a paramount concern of mankind. These effluents must also be treated. Natural biopolymers are industrially desirable because of their ability to remove metal ions found in waste water. Among the many other low-cost absorbents listed, chitosan has the highest sorption potential for several metal ions (1) . In specific, we were trying to extract chitosan from shrimp, by N-deacetylation of chitin. The chemical structure of chitosan was characterised by the spectroscopy of Fourier Transform Infrared (FT-IR). The degree of N-deacetylation (DDA) was also calculated from FT-IR data. The use of biosorbent chitosan-fatty acid derivatives makes it possible to extract both heavy metals and organic compounds. In this analysis, the grafting copolymer of fatty chitosan derivatives with acrylic acid polymer was synthesised using ceric ammonium nitrate, the redox nitric acid method under UV irradiation. Synthesized copolymers have been subjected to various analytical techniques such as X-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential thermogravimetric analysis (DTA) to confirm the formation of copolymers and to research their thermal stability. The findings show the formation and strong chemical interaction between fatty chitosan derivatives and acrylic acid. Fatty Chitosan derivatives and prepared grafting copolymers have been treated with copper and chromium-containing metal solutions and the results have shown that fatty chitosan derivatives and prepared copolymers are excellent in the removal of heavy metals such as copper and chromium. Prepared compounds could therefore open the way for industrial waste water treatment.

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.

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