scholarly journals Role of Bioadsorbents in Reducing Toxic Metals

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Blessy Baby Mathew ◽  
Monisha Jaishankar ◽  
Vinai George Biju ◽  
Krishnamurthy Nideghatta Beeregowda
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Toxic Metals ◽  
Metal Ion ◽  
Lead And Cadmium ◽  
Oil Palm Shell ◽  
Effective Removal ◽  
Removal Of Heavy Metals ◽  
Near Future

Industrialization and urbanization have led to the release of increasing amounts of heavy metals into the environment. Metal ion contamination of drinking water and waste water is a serious ongoing problem especially with high toxic metals such as lead and cadmium and less toxic metals such as copper and zinc. Several biological materials have attracted many researchers and scientists as they offer both cheap and effective removal of heavy metals from waste water. Therefore it is urgent to study and explore all possible sources of agrobased inexpensive adsorbents for their feasibility in the removal of heavy metals. The objective was to study inexpensive adsorbents like various agricultural wastes such as sugarcane bagasse, rice husk, oil palm shell, coconut shell, and coconut husk in eliminating heavy metals from waste water and their utilization possibilities based on our research and literature survey. It also shows the significance of developing and evaluating new potential biosorbents in the near future with higher adsorption capacity and greater reusable options.

Scientific Insights Into Modified and Non-Modified Biomaterials for Sorption of Heavy Metals From Water

2020 ◽  
pp. 807-827
Author(s):  
Tawfik A. Saleh ◽  
Salawu Omobayo Adio ◽  
Prakash Parthasarathy ◽  
Gaddafi I. Danmaliki
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Environmentally Friendly ◽  
Operating Conditions ◽  
Highly Efficient ◽  
Factors Influencing ◽  
Removal Of Heavy Metals ◽  
Near Future

Adsorption techniques are widely used for the removal of various classes of pollutants from water due to their mild and facile operating conditions. The operations involved in the adsorption techniques are environmentally friendly, economical, highly selective on pollutants, highly efficient and easily operative. However, the adsorption of heavy metals from water using biomaterials (biosorption) is a relatively new and interesting technique which holds a great potential. Its effectiveness in lowering the heavy metals concentration to sub-ppb levels is appealing and has attracted increasing attention. The technique is believed to replace the existing technologies in the near future. This chapter discusses the prospects of biomaterials in the removal of heavy metals from waste water, the modification techniques that can enhance biosorption efficiency, and the factors influencing the biosorption processes.

scholarly journals Eco Friendly Sorbent for the Removal of Iron and Lead from Industrial Waste Water

2019 ◽  
pp. 125-128
Author(s):  
Renjusha S ◽  
Shyama Nair
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Industrial Waste ◽  
Contact Time ◽  
Metal Ion ◽  
Industrial Effluents ◽  
Batch Adsorption ◽  
Industrial Waste Water ◽  
Adsorption Studies ◽  
Removal Of Heavy Metals

Industrial effluents loaded with heavy metals are a cause of hazards to human and other forms of life. Conventional methods such as chemical precipitation, evaporation, electroplating, ion exchange, reverse osmosis etc., used for removal of heavy metals from waste water however, are often cost prohibitive having inadequate efficiencies at low metal ion concentrations. Biosorption can be considered as an alternative technology which has been proved as more efficient and economical for removal of heavy metals from the industrial waste water. In the present study, the adsorption capacity of epicarp of Atrocarpus heterophyllus for the removal of heavy metals, lead and iron were determined by batch adsorption studies. Adsorption of heavy metals were studied till equilibrium was reached. Studies were carried by using different doses of adorbent, varying the conditions of adsorption and contact time. The results obtained shows that, the adsorption of the metal ions is contact time and adsorbent dosage dependent. Adsorption studies obeys both Langmuir isotherm model and Freundlich models. The goal for this work is to develop inexpensive, highly available, effective adsorbents from epicarp of jackfruit as alternative to existing commercial adsorbents.

Scientific Insights Into Modified and Non-Modified Biomaterials for Sorption of Heavy Metals From Water

2017 ◽  
pp. 13-39
Author(s):  
Tawfik A. Saleh ◽  
Salawu Omobayo Adio ◽  
Prakash Parthasarathy ◽  
Gaddafi I. Danmaliki
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Environmentally Friendly ◽  
Operating Conditions ◽  
Highly Efficient ◽  
Factors Influencing ◽  
Removal Of Heavy Metals ◽  
Near Future

Adsorption techniques are widely used for the removal of various classes of pollutants from water due to their mild and facile operating conditions. The operations involved in the adsorption techniques are environmentally friendly, economical, highly selective on pollutants, highly efficient and easily operative. However, the adsorption of heavy metals from water using biomaterials (biosorption) is a relatively new and interesting technique which holds a great potential. Its effectiveness in lowering the heavy metals concentration to sub-ppb levels is appealing and has attracted increasing attention. The technique is believed to replace the existing technologies in the near future. This chapter discusses the prospects of biomaterials in the removal of heavy metals from waste water, the modification techniques that can enhance biosorption efficiency, and the factors influencing the biosorption processes.

An Adsorption Study of Removal of Heavy Metals Using Enivironment Friendly Agro Based Materials

2021 ◽  
Author(s):  
Jaisankar viswanathan ◽  
K Aswini ◽  
K Deepa ◽  
N Suganya ◽  
V Jaisankar
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Graphene Oxide ◽  
Metal Ion ◽  
Agricultural Waste ◽  
Sem Analysis ◽  
Single Step ◽  
Adsorption Study ◽  
Coconut Husk ◽  
Removal Of Heavy Metals

Abstract The tremendous increase in the usage of heavy metals over the past few decades resulted in an increased flux of metallic substances in the aquatic environment which requires special concern because of their persistency. The investigation illustrates the removal of heavy metals from waste water by coconut husk based polymer/graph The method of graphene oxide (GO) synthesis involves the single-step reforming of Coconut husk agricultural waste material by oxidation under muffled atmosphere condition.ene oxide composites (CHGO) which is expected to act as good adsorbent materials. The graphene oxide (CHGO) and the corresponding composites PVP/CHGO and PEG/CHGO were characterized by Fourier transform infrared (FTIR), X-ray Diffraction Analysis (XRD) and scanning electron microscope (SEM) analysis. The adsorption study of Coconut husk Graphene oxide (CHGO) and its composites viz., Polyvinylpyrrolidone (PVP)/ Coconut husk Graphene oxide nanocomposite (PVP/CHGO) and Polyethyleneglycol (PEG)/ Coconut husk Graphene oxide nanocomposite (PEG/CHGO) was carried out for the removal of heavy metals from simulated waste water and results were compared. The performance analysis was carried out as a function of various operating parameters, such as initial concentration of metal ion, adsorbent dosage, contact time, and pH. The studies revealed that materials are effective in removal of heavy metals. The Pseudo-first, Pseudo-second order and Elovich kinetic Models were used to analyse the adsorption equilibrium.

Study of the Cu(II) removal from aqueous solutions by adsorption on titania

2013 ◽  
Vol 12 (3) ◽  
pp. 239-247
Keyword(s):  
Heavy Metals ◽  
Ionic Strength ◽  
Toxic Metals ◽  
Low Cost ◽  
Lateral Interaction ◽  
Tio2 Surface ◽  
High Toxicity ◽  
Removal Of Heavy Metals ◽  
Solution Parameters ◽  
Kinetics Of

The removal of heavy metals from wastewaters is a matter of paramount importance due to the fact that their high toxicity causes major environmental pollution problems. One of the most efficient, applicable and low cost methods for the removal of toxic metals from aqueous solutions is that of their adsorption on an inorganic adsorbent. In order to achieve high efficiency, it is important to understand the influence of the solution parameters on the extent of the adsorption, as well as the kinetics of the adsorption. In the present work, the adsorption of Cu(II) species onto TiO2 surface was studied. It was found that the adsorption is a rapid process and it is not affected by the value of ionic strength. In addition, it was found that by increasing the pH, the adsorbed amount of Cu2+ ions and the value of the adsorption constant increase, whereas the value of the lateral interaction energy decreases.

scholarly journals Assessment of sulfonated homo and co-polyimides incorporated polysulfone ultrafiltration blend membranes for effective removal of heavy metals and proteins

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Mohammad A. Jafar Mazumder ◽  
Panchami H. Raja ◽  
Arun M. Isloor ◽  
Muhammad Usman ◽  
Shakhawat H. Chowdhury ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Effective Removal ◽  
Blend Membranes ◽  
Removal Of Heavy Metals

scholarly journals The effective removal of heavy metals from water by activated carbon adsorbents of Albizia lebbeck and Melia azedarach seed shells

2019 ◽  
Vol 15 (No. 1) ◽  
pp. 30-37 ◽  
Author(s):  
Mohib Ullah ◽  
Ruqia Nazir ◽  
Muslim Khan ◽  
Waliullah Khan ◽  
Mohib Shah ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Toxic Metals ◽  
Low Cost ◽  
Future Generations ◽  
Carbon Adsorbents ◽  
Melia Azedarach ◽  
Albizia Lebbeck ◽  
Effective Removal ◽  
Removal Of Heavy Metals ◽  
Concentrated Solution

The removal of toxic metals like lead (Pb) and cadmium (Cd) is very urgent keeping their hazardous effects in view. In this work, seeds of Albizia lebbeck and Melia azedarach trees were converted into activated carbon adsorbents and applied for the adsorptive removal of Pb and Cd metals from an aqueous solution. The as prepared adsorbents were characterised by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The removal efficiencies of both metals were strongly dependent on their initial concentration, contact time, pH, temperature and the quantity of adsorbents. 0.2 g of both adsorbents removed respectively 75 and 62% Pb and 77 and 66% Cd from from 100 ml of a 40 mg/l concentrated solution in 120 min at pH 5 and a temperature of 20°C. Both the Freundlich and Langmuir isotherms were well fitted to the experimental data. We believe that this work will provide a convenient way to synthesise low cost activated carbon adsorbents for the remediation of highly toxic metals from wastewater to safeguard our environment for future generations.

scholarly journals REMOVAL OF HEAVY METALS FROM WASTE WATER BY USING A NATURAL AND BIODEGRADABLE ADSORBENT BASED ON PRUNUS AVIUM L. STEMS AS ADSORBENTS.

2016 ◽  
Vol 4 (12) ◽  
pp. 441-449
Author(s):  
Ali Mcheik ◽  
◽  
Wassef ElKhatib ◽  
Akram Hijazi ◽  
Kamal Hariri ◽  
...  
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Prunus Avium ◽  
Removal Of Heavy Metals ◽  
Prunus Avium L

Role of nanomaterials as adsorbents in heavy metal ion removal from waste water: A review

2020 ◽  
Vol 33 ◽  
pp. 101038 ◽  
Author(s):  
Shweta Wadhawan ◽  
Ayushi Jain ◽  
Jasamrit Nayyar ◽  
Surinder Kumar Mehta
Keyword(s):  
Waste Water ◽  
Heavy Metal ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal

Role of rGO to improve the performance of BiVO4 nanostructures for efficient removal of heavy metals

2019 ◽  
Vol 10 (5) ◽  
pp. 1421-1432
Author(s):  
Muhammad Bilal Tahir ◽  
Tahir Iqbal ◽  
Habiba Kiran ◽  
Sumera Afsheen ◽  
Shabbir Muhammad ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Efficient Removal ◽  
Removal Of Heavy Metals
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