Detoxification of toxic metal ions by sorption onto activated carbon from hevea brasiliensis bark – a comparative study

Sorption of toxic metal ions (Ni2+, Cu2+ and Cd2+) from Hevea brasiliensis bark carbon (HBBC) was carried out at 30±1 °C under various experimental conditions. Effect of various process parameters has been investigated by following the batch adsorption technique at 30 +1°C. The percentage removal increased with decrease in initial concentration and particle size and increase in contact time and dose of adsorbent. As initial pH of the slurry increased, the percentage removal increased, reached a maximum. The adsorption is highly pH sensitive. Adsorption data were modelled with various isotherms and first order kinetic equations proposed by Natarajan-Khalaf, Lagergren and Bhattacharya-Venkobachar and intraparticle diffusion models found to be applicable. Kinetics of adsorption is observed to be first order with Intra- particle diffusion as one of the rate determining steps. The monolayer adsorption capacities of HBBC also studied by Langmuir isotherms. HBBC could be used as low-cost adsorbents in effluent treatment, especially for the removal of metal ions, particular in Ni2+, Cu2+ and Cd2+ ions. It is confirmed by FT-IR studies before and after adsorption.

Download Full-text

Removal of Lead(II) Ions by Adsorption ontoBamboo Dust and Commercial Activated Carbons -A Comparative Study

E-Journal of Chemistry ◽

10.1155/2009/515178 ◽

2009 ◽

Vol 6 (1) ◽

pp. 247-256 ◽

Cited By ~ 27

Author(s):

N. Kannan ◽

T. Veemaraj

Keyword(s):

Activated Carbon ◽

Activated Carbons ◽

Kinetic Equations ◽

Effluent Treatment ◽

Batch Adsorption ◽

Particle Diffusion ◽

Order Kinetic ◽

First Order ◽

Intra Particle Diffusion ◽

Percentage Removal

Studies on the removal of lead(II) ions by adsorption onto indigenously prepared bamboo dust carbon (BDC) and commercial activated carbon (CAC) have been carried out with an aim to obtain data for treating effluents from metal processing and metal finishing industries. Effect of various process parameters has been investigated by following the batch adsorption technique at 30±1°C. Percentage removal of lead(II) ions increased with the decrease in initial concentration and increased with increase in contact time and dose of adsorbent. Amount of lead(II) ions adsorbed increases with the decrease in particle size of the adsorbent. As initial pH of the slurry increased, the percentage removal increased, reached a maximum and the final solution pH after adsorption decreases. Adsorption data were modeled with the Freundlich and Langmuir isotherms, the first order kinetic equations proposed by Natarajan – Khalaf, Lagergren and Bhattacharya and Venkobachar and intra- particle diffusion model and the models were found to be applicable. Kinetics of adsorption is observed to be first order with intra-particle diffusion as one of the rate determining steps. Removal of lead(II) ions by bamboo dust carbon (BDC) is found to be favourable and hence BDC could be employed as an alternative adsorbent to commercial activated carbon (CAC) for effluent treatment, especially for the removal of lead(II) ions

Download Full-text

Comparative Study on Adsorption of Mn(II) from Aqueous Solutions on Various Activated Carbons

E-Journal of Chemistry ◽

10.1155/2009/587159 ◽

2009 ◽

Vol 6 (3) ◽

pp. 693-704 ◽

Cited By ~ 12

Author(s):

K. A. Emmanuel ◽

A. Veerabhadra Rao

Keyword(s):

Activated Carbons ◽

Low Cost ◽

Waste Water Treatment ◽

Kinetic Equations ◽

Batch Adsorption ◽

Order Kinetic ◽

Kinetics Of Adsorption ◽

First Order ◽

Ipomea Batatas ◽

Initial Ph

The adsorption of Mn(II) on indigenously prepared activated carbons (IPAC) fromBombax malabaricum,Pithecelobium dulse,Ipomea batatasandPeltaforum ferraginiumhave been studied. The effects of various experimental parameters have been investigated using batch adsorption technique. The extent of Mn(II) removal increased with decrease in initial concentration of the Mn(II), particle size of the adsorbent and increased with increase in contact time, amount of adsorbent used and the initial pH of the solution. Adsorption data were modeled using Freundlich and Langmuir adsorption isotherms and first order kinetic equations. The kinetics of adsorption was found to be first order with regard to intra-particle diffusion rate. The results indicate that such carbons could be employed as low cost adsorbents in waste water treatment for the removal of Mn(II).

Download Full-text

Comparative study on the removal of acid violet by adsorption on various low cost adsorbents

Global NEST Journal ◽

10.30955/gnj.000457 ◽

2013 ◽

Vol 10 (3) ◽

pp. 395-403

Keyword(s):

Chromium Oxide ◽

Low Cost ◽

Kinetic Equations ◽

Batch Adsorption ◽

Order Kinetic ◽

First Order ◽

Cashew Nut ◽

Cashew Nut Shell ◽

Acid Violet ◽

Iron Chromium

The kinetic studies on the removal of Acid Violet-17 (AV) by adsorption on various adsorbents such as fly ash (FA), iron chromium oxide (ICO), lignite coal (LC), kapok fruit shell carbon (KC) and cashew nut shell carbon (CC) have been made and the results have been compared with that of commercial activated carbon (CAC). Effect of various experimental parameters has been investigated using batch adsorption technique at room temperature (30±1ºC). The percentage removal of AV increases with decrease in the initial concentration of AV, initial pH and particle size of adsorbent and increases with increase in the contact time and dose of adsorbent. Adsorption data were modeled with the Freundlich and Langmuir adsorption isotherms and various first order kinetic equations at 30±1ºC. The kinetics of adsorption is found to be first order with intra particle diffusion as one of the rate determining steps. The adsorbent materials like iron-chromium oxide (ICO), kapok fruit shell carbon (KC) and cashew nut shell carbon (CC) could be employed as low cost adsorbents as alternative materials to CAC for the removal of AV.

Download Full-text

Colorimetric sensing approaches based on silver nanoparticles aggregation for determination of toxic metal ions in water sample: a review

International Journal of Environmental & Analytical Chemistry ◽

10.1080/03067319.2021.1873315 ◽

2021 ◽

pp. 1-16

Author(s):

Rajat Singh ◽

Rahul Mehra ◽

Ankita Walia ◽

Simmy Gupta ◽

Prince Chawla ◽

...

Keyword(s):

Silver Nanoparticles ◽

Metal Ions ◽

Water Sample ◽

Toxic Metal ◽

Colorimetric Sensing ◽

Toxic Metal Ions

Download Full-text

The facile soft-template-morphology-controlled (STMC) synthesis of ZnIn2S4 nanostructures and their excellent morphology-dependent adsorption properties

Journal of Materials Chemistry A ◽

10.1039/c9ta11800d ◽

2020 ◽

Vol 8 (4) ◽

pp. 1986-2000 ◽

Cited By ~ 3

Author(s):

Afaq Ahmad Khan ◽

Arif Chowdhury ◽

Sunita Kumari ◽

Sahid Hussain

Keyword(s):

Metal Ions ◽

Toxic Metal ◽

Adsorption Properties ◽

Organic Dye ◽

Soft Template ◽

Toxic Metal Ions ◽

Controlled Morphology

ZnIn2S4 nanostructures were fabricated with controlled morphology and utilized for the adsorption of an organic dye and toxic metal ions.

Download Full-text

Tuning the sensitivity towards mercury via cooperative binding to d-fructose: dual fluorescent chemosensor based on 1,8-naphthyridine-boronic acid derivative

RSC Advances ◽

10.1039/d1ra02122b ◽

2021 ◽

Vol 11 (24) ◽

pp. 14862-14870

Author(s):

Marina Rajadurai ◽

E. Ramanjaneya Reddy

Keyword(s):

Metal Ions ◽

Acid Derivative ◽

Boronic Acid ◽

Toxic Metal ◽

Fluorescent Chemosensor ◽

Cooperative Binding ◽

Toxic Metal Ions

This new dual d-fructose–mercury chemosensor is the first example of utilizing boronic acid–diol complexation for enhancement of the sensor's sensitivity towards toxic metal ions.

Download Full-text