scholarly journals ADSORPTIVE REMOVAL OF HAZARDOUS INORGANIC ELEMENTS FROM WATER BY USING ORANGE WASTE

2010 ◽  
Vol 8 (3) ◽  
pp. 293-299 ◽  
Author(s):  
Katsutoshi Inoue
Keyword(s):  
Heavy Metals ◽  
Metal Ions ◽  
Orange Juice ◽  
Adsorption Behavior ◽  
Inorganic Elements ◽  
Toxic Heavy Metals ◽  
Pectic Acid ◽  
Phosphorus Adsorption ◽  
Anionic Species ◽  
Orange Waste

Pectic acid contained in some fruits like orange and apple is natural chelating polymeric material, exhibiting excellent adsorption behavior for some cationic metal ions including toxic heavy metals such as lead and copper. In addition, it also exhibits excellent adsorption behavior for some hazardous inorganic anionic species like phosphorus, arsenic and fluoride by loading some high valence cationic metal ions like zirconium(IV) in advance.For the practical application to the removal of these hazardous inorganic elements from various waste water at cheap cost, orange juice residue was employed instead of pure pectic acid. Orange juice residue just after juicing was activated by saponification with small amount of calcium hydroxide to prepare the sorbent.Some hazardous cationic species like lead(II), copper(II) and cadmium(II) were effectively adsorbed on this sorbent, while toxic anionic species like phosphate, arsenate, arsenite and fluoride were also effectively adsorbed on zirconium(IV)-loaded sorbent.     Keywords: Orange waste, Pectic acid, Natural chelating material, Heavy metals, Arsenic, Phosphorus, Adsorption, Removal, Water

scholarly journals Effective Removal of Fluoride onto Metal Ions Loaded Orange Waste

2012 ◽  
Vol 27 ◽  
pp. 61-66 ◽  
Author(s):  
Kedar Nath Ghimire
Keyword(s):  
Metal Ions ◽  
Removal Efficiency ◽  
Orange Juice ◽  
Experimental Results ◽  
Fluoride Removal ◽  
Acidic Ph ◽  
Neutral Ph ◽  
Effective Removal ◽  
Orange Waste ◽  
Ph Range

Removal of fluoride is investigated onto several metal ions loaded phosphorylated orange juice residue and commercially available alumina. The experimental results revealed that cerium (IV) loaded phosphorylated orange waste indicated excellent fluoride removal efficiency at acidic pH range and while that lanthanum loaded at neutral pH range. Both the metal loaded adsorbents are found superior to the commercially available activated alumina.DOI: http://dx.doi.org/10.3126/jncs.v27i1.6660 J. Nepal Chem. Soc., Vol. 27, 2011 61-66 

scholarly journals Removal of Cadmium, Copper, and Lead From Water Using Bio-Sorbent From Treated Olive Mill Solid Residue

2021 ◽  
Vol 15 ◽  
pp. 117863022110531
Author(s):  
Enas N Mahmoud ◽  
Fidaa’ Y Fayed ◽  
Khalil M Ibrahim ◽  
Sawsan Jaafreh
Keyword(s):  
Heavy Metals ◽  
Metal Ions ◽  
Oxygen Demand ◽  
Exchange Capacity ◽  
Pollutant Removal ◽  
Metal Species ◽  
Solid Residue ◽  
Toxic Heavy Metals ◽  
Sorption Data ◽  
Olive Mill

Olive Mill Solid Residue (OMSR) can be utilized as a bio-sorbent in wastewater treatment. Even though several studies on OMSR as a bio-sorbent were carried out, there is still a need to investigate a simple and relatively inexpensive OMSR treatment that increases pollutant removal. In this study; OMSR is used in batch experiments to remove toxic heavy metals from aqueous solutions including Cd2+, Cu2+, and Pb2+ ions. The effect of OMSR treatment (untreated; OMSR-U, treated with n-hexane; OMSR-H, and treated with water; OMSR-W) was investigated by chemical oxygen demand and cation exchange capacity. It was confirmed by both tests that OMSR-W was the best treatment. The same result was re-confirmed by batch uptake experiments of the heavy metal ions. Using OMSR-W as a bio-sorbent; the effect of several parameters such as pH, contact time, bio-sorbent concentration, metal ions concentration, and the presence of other metal species were studied to figure their influence on the metal ions uptake. The optimum conditions for single metal systems were found to occur at pH 5.5, an initial metal concentration of 50 mg/L, a shaking time of 60 minutes, a bio-sorbent concentration of 20 g/L. In binary metal ions solutions; Cd2+ uptake was increased in presence of Cu2+ or Pb2+. However, the uptake of Cu2+ and Pb2+ was decreased in presence of other metals. The equilibrium sorption data for single metal systems were described by the Langmuir isotherm model. The highest value of maximum uptake was found for Pb2+ (4.587 mg/g) followed by Cd2+ (4.525 mg/g) and Cu2+ (4.367 mg/g). These results show that OMSR-W, which has a very low economical value, could be used for the treatment of wastewater contaminated with heavy metals.

scholarly journals Bioremediation of Chromium by Microorganisms and Its Mechanisms Related to Functional Groups

2021 ◽  
Vol 2021 ◽  
pp. 1-21
Author(s):  
Abate Ayele ◽  
Yakob Godebo Godeto
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Functional Groups ◽  
Heavy Metal Ions ◽  
Future Research ◽  
Oil Well ◽  
Toxic Heavy Metals ◽  
Toxic Heavy Metal ◽  
Minimum Concentration

Heavy metals generated mainly through many anthropogenic processes, and some natural processes have been a great environmental challenge and continued to be the concern of many researchers and environmental scientists. This is mainly due to their highest toxicity even at a minimum concentration as they are nonbiodegradable and can persist in the aquatic and terrestrial environments for long periods. Chromium ions, especially hexavalent ions (Cr(VI)) generated through the different industrial process such as tanneries, metallurgical, petroleum, refractory, oil well drilling, electroplating, mining, textile, pulp and paper industries, are among toxic heavy metal ions, which pose toxic effects to human, plants, microorganisms, and aquatic lives. This review work is aimed at biosorption of hexavalent chromium (Cr(VI)) through microbial biomass, mainly bacteria, fungi, and microalgae, factors influencing the biosorption of chromium by microorganisms and the mechanism involved in the remediation process and the functional groups participated in the uptake of toxic Cr(VI) from contaminated environments by biosorbents. The biosorption process is relatively more advantageous over conventional remediation technique as it is rapid, economical, requires minimal preparatory steps, efficient, needs no toxic chemicals, and allows regeneration of biosorbent at the end of the process. Also, the presence of multiple functional groups in microbial cell surfaces and more active binding sites allow easy uptake and binding of a greater number of toxic heavy metal ions from polluted samples. This could be useful in creating new insights into the development and advancement of future technologies for future research on the bioremediation of toxic heavy metals at the industrial scale.

FTIR study and bioadsorption kinetics of bioadsorbent for the analysis of metal pollutants

RSC Advances ◽  
2014 ◽  
Vol 4 (102) ◽  
pp. 58156-58163 ◽  
Author(s):  
Nik Norulaini Nik Abd. Rahman ◽  
Mohammad Shahadat ◽  
Chew Ann Won ◽  
Fatehah Mohd Omar
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Industrial Effluents ◽  
Environmental Problems ◽  
Adsorption Behavior ◽  
Metal Pollutants ◽  
Ftir Study ◽  
Kinetics Of

Elevated concentrations of heavy metals in groundwater cause many environmental problems. This paper reports adsorption behavior of a green bioadsorbent (Trichoderma sp.) for the removal of heavy metal ions from industrial effluents.

scholarly journals Pelletized ponderosa pine bark for adsorption of toxic heavy metals from water

BioResources ◽  
2007 ◽  
Vol 2 (1) ◽  
pp. 66-81
Author(s):  
Miyoung Oh ◽  
Mandla A. Tshabalala
Keyword(s):  
Heavy Metals ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Ponderosa Pine ◽  
Metal Ion ◽  
Value Added ◽  
Freundlich Isotherm ◽  
Toxic Heavy Metals ◽  
Adsorption Affinity ◽  
Column Adsorption

ark flour from ponderosa pine (Pinus ponderosa) was consolidated into pellets using citric acid as cross-linking agent. The pellets were evaluated for removal of toxic heavy metals from synthetic aqueous solutions. When soaked in water, pellets did not leach tannins, and they showed high adsorption capacity for Cu(II), Zn(II), Cd(II), and Ni(II) under both equilibrium and dynamic adsorption conditions. The experimental data for Cd(II) and Zn(II) showed a better fit to the Langmuir than to the Freundlich isotherm. The Cu(II) data best fit the Freundlich isotherm, and the Ni(II) data fitted both Freundlich and Langmuir isotherms equally. According to the Freundlich constant KF, adsorption capacity of pelletized bark for the metal ions in aqueous solution, pH 5.1 ± 0.2, followed the order Cd(II) > Cu(II) > Zn(II) >> Ni(II); according to the Langmuir constant b, adsorption affinity followed the order Cd(II) >> Cu(II) ≈ Zn(II) >> Ni(II). Although data from dynamic column adsorption experiments did not show a good fit to the Thomas kinetic adsorption model, estimates of sorption affinity series of the metal ions on pelletized bark derived from this model were not consistent with the series derived from the Langmuir or Freundlich isotherms and followed the order Cu(II) > Zn(II) ≈ Cd(II) > Ni(II). According to the Thomas kinetic model, the theoretical maximum amounts of metal that can be sorbed on the pelletized bark in a column at influent concentration of ≈10 mg/L and flow rate = 5 mL/min were estimated to be 57, 53, 50, and 27 mg/g for copper, zinc, cadmium, and nickel, respectively. This study demonstrated the potential for converting low-cost bark residues to value-added sorbents using starting materials and chemicals derived from renewable resources. These sorbents can be applied in the removal of toxic heavy metals from waste streams with heavy metal ion concentrations of up to 100 mg/L in the case of Cu(II).

The influence of heavy metals on the production of extracellular polymer substances in the processes of heavy metal ions elimination

2005 ◽  
Vol 52 (10-11) ◽  
pp. 151-156 ◽  
Author(s):  
J. Mikes ◽  
M. Siglova ◽  
A. Cejkova ◽  
J. Masak ◽  
V. Jirku
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Cell Wall ◽  
Metal Ions ◽  
Cell Walls ◽  
Heavy Metal Ions ◽  
Extracellular Polymeric Substances ◽  
Low Cost ◽  
Toxic Heavy Metals ◽  
Metal Interactions

Wastewaters from a chemical industry polluted by heavy metal ions represent a hazard for all living organisms. It can mean danger for ecosystems and human health. New methods are sought alternative to traditional chemical and physical processes. Active elimination process of heavy metals ions provided by living cells, their components and extracellular products represents a potential way of separating toxic heavy metals from industrial wastewaters. While the abilities of bacteria to remove metal ions in solution are extensively used, fungi have been recognized as a promising kind of low-cost adsorbents for removal of heavy-metal ions from aqueous waste sources. Yeasts and fungi differ from each other in their constitution and in their abilities to produce variety of extracellular polymeric substances (EPS) with different mechanisms of metal interactions. The accumulation of Cd(2+), Cr(6+), Pb(2+), Ni(2+) and Zn(2+) by yeasts and their EPS was screened at twelve different yeast species in microcultivation system Bioscreen C and in the shaking Erlenmayer's flasks. This results were compared with the production of yeast EPS and the composition of yeast cell walls. The EPS production was measured during the yeast growth and cell wall composition was studied during the cultivations in the shaking flasks. At the end of the process extracellular polymers and their chemical composition were isolated and amount of bound heavy metals was characterized. The variable composition and the amount of the EPS were found at various yeast strains. It was influenced by various compositions of growth medium and also by various concentrations of heavy metals. It is evident, that the amount of bound heavy metals was different. The work reviews the possibilities of usage of various yeast EPS and components of cell walls in the elimination processes of heavy metal ions. Further the structure and properties of yeasts cell wall and EPS were discussed. The finding of mechanisms mentioned above is necessary to identify the functional groups entered in the metals elimination processes.

Facile fabrication of silk protein sericin-mediated hierarchical hydroxyapatite-based bio-hybrid architectures: excellent adsorption of toxic heavy metals and hazardous dye from wastewater

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86607-86616 ◽  
Author(s):  
Pradyot Koley ◽  
Makoto Sakurai ◽  
Toshiaki Takei ◽  
Masakazu Aono
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Congo Red ◽  
Heavy Metal Ions ◽  
Silk Protein ◽  
Toxic Heavy Metals ◽  
Toxic Heavy Metal ◽  
Hybrid Architectures ◽  
Facile Fabrication

Facilely fabricated silk protein sericin-mediated hierarchical hydroxyapatite hybrid architectures show excellent adsorption of toxic heavy metal ions of Pb(ii), Cd(ii) and Hg(ii) and a hazardous dye, Congo red (CR), from wastewater.

Sulfur-modified porous covalent organic polymers as bifunctional materials for efficient fluorescence detection and fast removal of heavy metal ions

2021 ◽  
Author(s):  
Jin Li ◽  
Shitao Wang ◽  
Xiaohua Cao ◽  
Huanan Huang ◽  
Dapeng Cao
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Fluorescence Detection ◽  
Heavy Metal Ions ◽  
Fluorescent Detection ◽  
Organic Polymers ◽  
Human Beings ◽  
Toxic Heavy Metals ◽  
Fast Removal

As one of the most toxic heavy metals to human beings and the environment, how to simultaneously achieve the fluorescent detection and removal of mercury in the wastewater is still...

Surfactant modulated aggregation induced enhancement of emission (AIEE)—a simple demonstration to maximize sensor activity

The Analyst ◽  
2016 ◽  
Vol 141 (1) ◽  
pp. 225-235 ◽  
Author(s):  
Rahul Bhowmick ◽  
Abu Saleh Musha Islam ◽  
Atul Katarkar ◽  
Keya Chaudhuri ◽  
Mahammad Ali
Keyword(s):  
Heavy Metals ◽  
Detection Limit ◽  
Metal Ions ◽  
Cell Imaging ◽  
Toxic Heavy Metals ◽  
Biologically Relevant ◽  
Simple Demonstration

A rhodamine-based chemosensor, L3, selectively and rapidly recognizes Hg2+ ions in the presence of all biologically relevant metal ions and toxic heavy metals with a detection limit of 78 nM along with possessing cytoplasmic cell imaging applications.

scholarly journals Comparative Utilization of Dead and Live Fungal Biomass for the Removal of Heavy Metal: A Concise Review

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Abate Ayele ◽  
Setegn Haile ◽  
Digafe Alemu ◽  
M. Kamaraj
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Fungal Biomass ◽  
Heavy Metal Ions ◽  
Metal Removal ◽  
Low Cost ◽  
Heavy Metal Removal ◽  
Cation Binding ◽  
Toxic Heavy Metals

Human and industrial activities produce and discharge wastes containing heavy metals into the water resources making them polluted, threatening human health and the ecosystem. Biosorption, the process of passive cation binding by dead or living biomass, represents a potentially cost-effective way of eliminating toxic heavy metals from industrial wastewater. The abilities of microorganisms to remove metal ions in solution have been extensively studied; in particular, live and dead fungi have been recognized as a promising class of low-cost adsorbents for the removal of heavy metal ions. The biosorption behavior of fungal biomass is getting attention due to its several advantages; hence, it needs to be explored further to take its maximum advantage on wastewater treatment. This review discusses the live and dead fungi characteristics of sorption, factors influencing heavy metal removal, and the biosorption capacities for heavy metal ions removal and also discusses the biosorption mechanisms.

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