scholarly journals Sorption Capacity of Toxic Heavy Metal Cr (VI) Ion on bentonite clay from Aqueous Solution by Kinetic and Thermodynamic Studies

2021 ◽  
Vol 37 (5) ◽  
pp. 1096-1101
Author(s):  
Priyanka Rathore ◽  
Rashmi Verma
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Sorption Capacity ◽  
Bentonite Clay ◽  
Temperature Dependent ◽  
Experimental Conditions ◽  
Toxic Heavy Metal ◽  
Freundlich Adsorption Isotherm ◽  
Kinetic And Thermodynamic Studies ◽  
Kinetic Equilibrium

The present study removal of toxic heavy metal Cr (VI) ion on bentonite clay from aqueous solution under different experimental conditions and also study sorption capacity are effect different pH, concentration, temperature and contact time of shaking.My study focused on use of bentonite clay as a best adsorbent for the removal of toxic heavy metal Cr (VI) ions from aqueous solution. Initial metal ions concentration increases 50 to 250mgL-1 the % removal Cr (VI) ion decreases from 66.64 % to 53.94 % but amount of sorption increases from 0.833 to 3.371mgg-1, The particle size of bentonite clay increase from 45 to 150μ by amount of adsorption of Cr (VI) decreasing from1.589 mgg-1 to 1.153mgg-1 , pH increasing from 2.0 to 10.0 the amount of sorption decrease from 2.018 to 1.161 mgg-1, temperature increasing from 303K to 313K adsorption is also increases from 1.589 to 1.822mgg-1. Kinetic study for value of rate constant k1 and k2 is favour concentration increases the amounts of the metals sorbent qcal also increases. Q and kf sorption capacity related to Langmuir and Freundlich adsorption isotherm constant. Value of both is favour sorption is temperature dependent. Thermodynamic study the value of ΔG0 increase -1.402 to -2.655it is best evidence temperature increases from 303K to 323K the adsorption of Cr (VI) ion increases because value of ΔG0 is negative favour the adsorption. My investigation best evidence the value of kinetic, equilibrium and thermodynamic parameter also favours the Sorption of Cr (VI) ion on bentonite clay from aqueous solution.

A water-stable zinc(ii)–organic framework as a multiresponsive luminescent sensor for toxic heavy metal cations, oxyanions and organochlorine pesticides in aqueous solution

2019 ◽  
Vol 48 (44) ◽  
pp. 16776-16785 ◽  
Author(s):  
Xiao-Qing Wang ◽  
Dou-Dou Feng ◽  
Jing Tang ◽  
Yu-Di Zhao ◽  
Jun Li ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Organochlorine Pesticides ◽  
Metal Organic Framework ◽  
Fluorescence Sensing ◽  
Toxic Heavy Metal ◽  
Heavy Metal Cations ◽  
Luminescent Sensor ◽  
Metal Organic ◽  
Organic Framework

A water-stable metal–organic framework exhibits multiresponsive fluorescence sensing for Fe(iii), Cr(iii/vi), and Mn(vii) ions and the organochlorine pesticide 2,6-Dich-4-NA in aqueous solution.

scholarly journals Synthesis, Characterization, and Applications of Silk/Bentonite Clay Composite for Heavy Metal Removal From Aqueous Solution

2019 ◽  
Vol 7 ◽  
Author(s):  
Nasira Wahab ◽  
Muhammad Saeed ◽  
Muhammad Ibrahim ◽  
Akhtar Munir ◽  
Muhammad Saleem ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Bentonite Clay

Removal of Toxic Heavy Metal Ions in Aqueous Solution with Mg/Al Type Hydrotalcite Derived from Wastes

2005 ◽  
Vol 31 (4) ◽  
pp. 285-290 ◽  
Author(s):  
Norihiro Murayama ◽  
Mitsuaki Tanabe ◽  
Ryo Shibata ◽  
Hideki Yamamoto ◽  
Junji Shibata
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Toxic Heavy Metal

scholarly journals Utilization of Banana (Musa sapientum) Peel for Removal of Pb2+ from Aqueous Solution

2021 ◽  
Vol 1 (2) ◽  
pp. 117-128
Author(s):  
Afrida Nurain ◽  
Protima Sarker ◽  
Md. Shiblur Rahaman ◽  
Md. Mostafizur Rahman ◽  
Md. Khabir Uddin
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Adsorption Isotherm ◽  
Contact Time ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Agitation Speed ◽  
Banana Peel ◽  
Management Problem ◽  
Freundlich Adsorption Isotherm

Biosorption is a convenient process for heavy metal remediation. In this study, banana peel was experimented to eliminate lead (Pb2+) from an aqueous solution following batch experiments. The functional groups of banana peel were identified by Fourier-transform infrared spectroscopy (FTIR). The adsorption mechanism was studied by the Langmuir and Freundlich adsorption isotherm model and determined the separation factor from the Langmuir adsorption isotherm. The adsorption of Pb2+ on dried banana peel had been studied at different adsorbent doses, pH, initial concentration of Pb, contact time, temperature, and agitation speed. After adsorption, Pb2+ was measured using atomic absorption spectroscopy (AAS). Maximum adsorption had taken place at pH 5 for adsorbent dose 45 g L-1. The optimum contact time and agitation speed was 30 minutes and 150 rpm, respectively for the initial Pb concentration of 100 ppm at 25°C. Both, Langmuir and Freundlich adsorption isotherm models shows the best fitting (r2 = 0.9978 and 0.9595) for Pb2+ adsorption. The maximum Pb2+ adsorption capacity was 2.1 mg g-1. The findings indicate that the banana peel waste could be a potential adsorbent for heavy metal removal. Moreover, the waste management problem could be solved in an eco-friendly manner by utilizing it for the eradication of Pb2+ from wastewater.

Effective Removal of Toxic Heavy Metal Ions from Aqueous Solution by CaCO3 Microparticles

2018 ◽  
Vol 229 (4) ◽  
Author(s):  
Rui Zhang ◽  
Joseph J. Richardson ◽  
Anthony F. Masters ◽  
Gyeongwon Yun ◽  
Kang Liang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Toxic Heavy Metal ◽  
Effective Removal
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