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.

scholarly journals MITIGATION OF METAL ION POLLUTION FROM INDUSTRIAL WASTE WATER USING WASTE WOOL

2013 ◽  
Vol 22 ◽  
pp. 619-625 ◽  
Author(s):  
GARIMA PRAJAPAT ◽  
PRAVEEN PUROHIT
Keyword(s):  
Waste Water ◽  
Industrial Waste ◽  
Metal Ion ◽  
Copper Ions ◽  
Industrial Effluents ◽  
Composite Ceramic ◽  
Industrial Waste Water ◽  
Spectrophotometric Methods ◽  
Fixed Weight ◽  
Removal Of Metal Ions

A study on the adsorption of copper (II) ions from the aqueous solution on waste wool had been carried out to analyze the adsorption capacity of waste wool, thereby aiming towards mitigation of metal ion pollution in industrial waste water. The effect of varying concentration of copper ions and varying time period, was studied on fixed weight of waste wool. The initial and final concentration of copper ions was measured by conductometric and spectrophotometric methods. Adsorption data were modeled with the langmuir and freundlich adsorption isotherms. The isotherm and first order equation were found to be applicable. Removal of metal ions using industrial waste wool is found to be favourable. Thus the work can be extended to study various physico-chemical parameters for removal of copper (II) ions from industrial effluents using waste wool. A later work can be involved where the waste wool adsorption parameter can be further utilized for composite ceramic products.

scholarly journals A novel efficient bioflocculant QZ-7 for the removal of heavy metals from industrial wastewater

RSC Advances ◽  
2019 ◽  
Vol 9 (48) ◽  
pp. 27825-27834 ◽  
Author(s):  
Zayed M. M. Abu Tawila ◽  
Salmah Ismail ◽  
Salem S. Abu Amr ◽  
Emad K. Abou Elkhair
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Water Treatment ◽  
Industrial Waste ◽  
Industrial Wastewater ◽  
Waste Water Treatment ◽  
Industrial Waste Water ◽  
Removal Of Heavy Metals

In this study, a novel bioflocculant was produced using Bacillus salmalaya 139SI for industrial waste water treatment.

scholarly journals Batch Sorption Experiments: Langmuir and Freundlich Isotherm Studies for the Adsorption of Textile Metal Ions onto Teff Straw (Eragrostis tef) Agricultural Waste

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Mulu Berhe Desta
Keyword(s):  
Heavy Metals ◽  
Metal Ions ◽  
Contact Time ◽  
Metal Ion ◽  
Low Cost ◽  
Agricultural Waste ◽  
Equilibrium Concentration ◽  
Eragrostis Tef ◽  
Batch Adsorption ◽  
Textile Effluents

Adsorption of heavy metals (Cr, Cd, Pb, Ni, and Cu) onto Activated Teff Straw (ATS) has been studied using batch-adsorption techniques. This study was carried out to examine the adsorption capacity of the low-cost adsorbent ATS for the removal of heavy metals from textile effluents. The influence of contact time, pH, Temperature, and adsorbent dose on the adsorption process was also studied. Results revealed that adsorption rate initially increased rapidly, and the optimal removal efficiency was reached within about 1 hour. Further increase in contact time did not show significant change in equilibrium concentration; that is, the adsorption phase reached equilibrium. The adsorption isotherms could be fitted well by the Langmuir model. The value in the present investigation was less than one, indicating that the adsorption of the metal ion onto ATS is favorable. After treatment with ATS the levels of heavy metals were observed to decrease by 88% (Ni), 82.9% (Cd), 81.5% (Cu), 74.5% (Cr), and 68.9% (Pb). Results indicate that the freely abundant, locally available, low-cost adsorbent, Teff straw can be treated as economically viable for the removal of metal ions from textile effluents.

Utilization of Powdered Cassava Stem as an Alternative Bioadsorbent for Lead (Pb2+) Removal from Aqueous Solution

2021 ◽  
Vol 1033 ◽  
pp. 82-86
Author(s):  
Tintin Mutiara ◽  
Andira Budi Trimartina ◽  
Rafika Erniza Putri ◽  
Achmad Chafidz
Keyword(s):  
Heavy Metals ◽  
Industrial Waste ◽  
Contact Time ◽  
Metal Ion ◽  
Adsorption Process ◽  
Cellulose Content ◽  
Optimum Conditions ◽  
Adsorption Method ◽  
Cassava Stem ◽  
Mesh Sieve

Industrial waste containing heavy metals can pollute the aquatic environment. One method that can be done to manage heavy waste is the adsorption method that uses adsorbent from cassava stem powder. This research was conducted to utilize cassava stem powder waste for the adsorption of Pb2 + metal ions. Cassava stem powder was mashed until it passed 100 mesh sieve. Cassava stems have a cellulose content of 70-80%, lignin 15-20%, ADF 15-20% and cellulose can be used as an absorber of heavy metals. The adsorption process is carried out with variations in pH, time and concentration under optimum conditions. In this adsorption involves the functional groups contained therein so that the interaction between the adsorbent with the metal ion Pb2 +. Based on the research, the optimum conditions were obtained at pH 6, 180 minutes contact time and 50 ppm concentration. This test is carried out using Atomic Absorption Spectroscopy (AAS).

Sorption of heavy metals from industrial waste water by low-cost mineral silicates

Clay Minerals ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 469-477 ◽  
Author(s):  
A. Garcia Sanchez ◽  
E. Alvarez Ayuso ◽  
O. Jimenez de Blas
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Industrial Waste ◽  
Low Cost ◽  
Reaction Medium ◽  
Cost Effective ◽  
Industrial Wastes ◽  
Industrial Waste Water ◽  
Adsorption Processes ◽  
Mineral Silicates

AbstractThe adsorption by different silicate minerals of some heavy metals, present in industrial waste water, has been studied. These adsorbents (mainly clay minerals) are readily available, inexpensive materials and offer a cost-effective alternative to conventional treatment of wastes from the metal finishing industry. The results show that some mineral species are suitable for the purification of such residual waters down to the limits prescribed by current legislation concerning industrial wastes. The Langmuir model was found to describe such adsorption processes best. Sepiolite (Orera, Spain) has an adsorption capacity of 8.26 mg g-1 for Cd2+, the capacities depending on the metal adsorbed in the order: Cd2+ > Cu2+ > Zn2+ > Ni2+. This mineral shows the highest sorption capacity relative to the other minerals studied. Factors in the reaction medium such as pH and ionic strength influenced the adsorption process.

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