Column Study on the Removal of Metals from Industrial Effluents using the Biomass Sargassum sp

Heavy metals are ubiquitous environmental contaminants in industrialized societies. The presence of heavy metals in the environment is of major concern because of their toxicity, bio-accumulating tendency, threat to human life and the environment. Traditional methods have been used to remove heavy metals from effluent include chemical precipitation, chemical oxidation/reduction, ion exchange, electrochemical treatment, evaporation and filtration. Many of these methods are ineffective; resulting in low levels of metal ion removal and can also be economically inefficient. Biomass of brown marine macro algae is a renewable biological resource, which is available in large quantities and can form a good base for the development of biosorbent material. The work considered the parameters of the effluents and the experimental column model for the metal adsorption. Among the experimental model Thomas model fitted the column biosorption data well.

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Synergistic effect of organic-inorganic hybrid nanocomposite ion exchanger on photocatalytic degradation of Rhodamine-B dye and heavy metal ion removal from industrial effluents

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2018.09.065 ◽

2018 ◽

Vol 6 (6) ◽

pp. 7091-7101 ◽

Cited By ~ 19

Author(s):

Kuljit Kaur ◽

Rajeev Jindal

Keyword(s):

Heavy Metal ◽

Synergistic Effect ◽

Metal Ion ◽

Industrial Effluents ◽

Hybrid Nanocomposite ◽

Inorganic Hybrid ◽

Metal Ion Removal ◽

Ion Removal ◽

Heavy Metal Ion Removal ◽

Rhodamine B Dye

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Abatement of organic pollutants using fly ash based adsorbents

Water Science & Technology ◽

10.2166/wst.2017.437 ◽

2017 ◽

Vol 76 (10) ◽

pp. 2580-2592 ◽

Cited By ~ 18

Author(s):

Kayode Adesina Adegoke ◽

Rhoda Oyeladun Oyewole ◽

Bukola Morenike Lasisi ◽

Olugbenga Solomon Bello

Keyword(s):

Fly Ash ◽

Organic Pollutants ◽

Human Life ◽

Chemical Precipitation ◽

Electrochemical Treatment ◽

Chemical Oxidation ◽

High Porosity ◽

Environmental Implications ◽

Adsorption Sites ◽

Treatment Techniques

Abstract The presence of organic pollutants in the environment is of major concern because of their toxicity, bio-accumulating tendency, threat to human life and the environment. It is a well-known fact that, these pollutants can damage nerves, liver, and bones and could also block functional groups of essential enzymes. Conventional methods for removing dissolved pollutants include chemical precipitation, chemical oxidation or reduction, filtration, ion-exchange, electrochemical treatment, application of membrane technology, evaporation recovery and biological treatment. Although all the pollutant treatment techniques can be employed, they have their inherent advantages and limitations. Among all these methods, adsorption process is considered better than other methods because of convenience, easy operation and simplicity of design. A fundamentally important characteristic of good adsorbents is their high porosity and consequent larger surface area with more specific adsorption sites. This paper presents a review of adsorption of different pollutants using activated carbon prepared from fly ash sources and the attendant environmental implications. Also, the ways of overcoming barriers to fly ash utilization together with regeneration studies are also discussed.

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Heavy Metal Toxicity, Health Hazards and their Removal Technique by Natural Adsorbents: A Short Overview

International Journal of Current Engineering and Technology ◽

10.14741/ijcet/v.8.2.35 ◽

2018 ◽

Vol 8 (02) ◽

Cited By ~ 2

Author(s):

Pournima R. Pawar ◽

Shrikant M. Bhosale

Keyword(s):

Heavy Metals ◽

Metal Ion ◽

Anthropogenic Activities ◽

Industrial Effluent ◽

Chemical Precipitation ◽

Severe Problem ◽

Metal Ion Removal ◽

Natural Adsorbents ◽

Industrial Operations ◽

Cadmium Selenium

Environmental pollution particularly from heavy metals and minerals in the wastewater is the most severe problem in India. Due to extensive anthropogenic activities such as industrial operations particularly mining, agricultural processes and disposal of industrial waste materials; their concentration has increased to dangerous levels. Heavy metals in industrial effluent include Copper, nickel, chromium, lead, zinc, arsenic, cadmium, selenium and uranium. So far, a number of efficient methods have been reviewed for the removal of heavy metals such as chemical precipitation, ion exchange, reverse osmosis, electro dialysis, ultra filtration, nanofiltration, coagulation, flocculation, floatation, etc. However these methods have several disadvantages such as high reagent requirement, unpredictable metal ion removal, generation of toxic sludge etc. Adsorption process being very simple, economical, effective and versatile has become the most preferred methods for removal of toxic contaminants from wastewater. This paper reviews the use of various readily available natural materials as adsorbents of heavy metals from industrial wastewater. Various natural adsorbents reviewed includes sand, waste tea leaves eggshell, rice husk, activated carbon, zeolites, olive stones, wood sawdust etc.

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The Adsorption of Heavy Metal from Aqueous Solutions onto the Porous Biomorphic-Genetic Composite of Hydroxyapatite/Carbon with Eucalyptus and Bamboo Template

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.730.260 ◽

2015 ◽

Vol 730 ◽

pp. 260-264 ◽

Cited By ~ 1

Author(s):

Shuang Cao ◽

Bin Huang ◽

Zong Qiang Zhu ◽

Yi Nian Zhu

Keyword(s):

Heavy Metals ◽

Metal Ion ◽

Contaminated Water ◽

Initial Concentration ◽

Metal Ion Removal ◽

Ion Removal ◽

Adsorbed Amount ◽

Removal Of Heavy Metals ◽

New Material ◽

Ammonia Leaching

This study used two types of plant, eucalyptus and bamboo, to produce sorbents for copper (II), cadmium (II), zinc (II), and lead (II) metal ion removal in a water bath shake. The porous biomorphic-genetic composite of hydroxyapatite/carbon with eucalyptus template (PBGC-Fe/C-E) and the porous biomorphic-genetic composite of hydroxyapatite/carbon with bamboo template (PBGC-Fe/C-B) were prepared using eucalyptus and bamboo as plant templates, and through various processes including ammonia leaching, cyclical impregnation using calcium hydroxide and diammonium solutions, and aerobic firing inside muffle furnaces. Tests were conducted on the HAP/C composites to observe their adsorption effects on Cu (II), Zn (II), Pb (II), and Cd (II). The results show that the prepared composites were able to adsorb heavy metals in water effectively. The results indicated that the adsorbed amount of PBGC-Fe/C-E were found to be 16.4371, 4.6725,24.5528, 17.0194 mg/1 for Cu (II), Zn (II), Pb (II) and Cd (II) ions at initial concentration of 50mg/L (25°C), respectively. The adsorbed amount of PBGC-Fe/C-B were found to be 10.5876, 3.9142,21.2463, 13.4721 mg/1 for Cu (II), Zn (II), Pb (II) and Cd (II) ions at initial concentration of 50mg/L (25°C), respectively. The prepared adsorbent is expected to be a new material for the removal of heavy metals from contaminated water.

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Novel Thermosensitive-co-Zwitterionic Sulfobetaine Gels for Metal Ion Removal: Synthesis and Characterization

Gels ◽

10.3390/gels7040273 ◽

2021 ◽

Vol 7 (4) ◽

pp. 273

Author(s):

Eva Oktavia Ningrum ◽

Takehiko Gotoh ◽

Wirawan Ciptonugroho ◽

Achmad Dwitama Karisma ◽

Elly Agustiani ◽

...

Keyword(s):

Metal Ion ◽

Industrial Effluents ◽

Proton Nuclear Magnetic Resonance ◽

Ion Adsorption ◽

Temperature Dependent ◽

Metal Ion Removal ◽

Ion Removal ◽

Angle Measurements ◽

Contact Angle Measurements ◽

Positively Charged

Zwitterionic betaine polymers are promising adsorbents for the removal of heavy metal ions from industrial effluents. Although the presence of both negative and positively charged groups imparts them the ability to simultaneously remove cations and anions, intra- and/or inter-chain interactions can significantly reduce their adsorption efficiencies. Therefore, in this study, novel gels based on crosslinked co-polymers of thermosensitive N-isopropylacrylamide (NIPAAM) and zwitterionic sulfobetaine N,N-dimethylacrylamido propyl ammonium propane sulfonate (DMAAPS) were synthesized, characterized, and evaluated for ion removal. Fourier-transform infrared (FTIR) and proton nuclear magnetic resonance (1H NMR) analyses confirmed the success of the co-polymerization of NIPAAM and DMAAPS to form poly(NIPAAM-co-DMAAPS). The phase transition temperature of the co-polymer increased with increasing DMAAPS content in the co-polymer, indicating temperature-dependent amphiphilic behavior, as evidenced by contact angle measurements. The ion adsorption analyses of the poly(NIPAAM-co-DMAAPS) gels indicated that co-polymerization increased the molecular distance and weakened the interaction between the DMAAPS-charged groups (SO3− and N+), thereby increasing the ion adsorption. The results confirmed that, with a low concentration of DMAAPS in the co-polymer gels (~10%), the maximum amount of Cr3+ ions adsorbed onto the gel was ~58.49% of the sulfonate content in the gel.

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