Measurement of 224Ra and 223Ra activity using MnO2 based in situ pre-concentration technique coupled with delayed coincidence counting in creek ecosystem of Mumbai Harbour Bay

Yadav, V. B.; Sartandel, S. J.; Jha, S. K.; Tripathi, R. M.

doi:10.1007/s10967-016-5103-z

Cited by 3 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present study deals with the adsorption of Cu(II) by biochar fibers derived from Opuntia ficus-indica prior and after MnO 2 deposition. MnO 2 deposition on the biochar fibers is expected to enhance their separation efficiency and selectivity toward bivalent metal ions [6,18] and Cu(II) has been used as an analogue for bivalent toxic metal ions such as Cd(II) and Pb(II). The present study aims to investigate the effect of various parameters (e.g., pH, copper concentration, ionic strength, temperature and contact time) on the biosorption performance and determine thermodynamic parameters (e.g., K d , ΔG°, ΔH° and ΔS°), which are of fundamental importance for both the assessment of the chemical behavior of bivalent metal ions in aquatic environments and the development of water treatment technologies.…”

Section: Introductionmentioning

confidence: 99%

Copper(II) adsorption by Opuntia ficus-indica biochar fiber–MnO2 composites

Hadjiyiannis¹,

Pashalidis²

2019

Desalination and Water Treatment

View full text Add to dashboard Cite

a b s t r a c tThe adsorption efficiency of biochar fibers obtained from Opuntia ficus-indica cactus regarding the removal of Cu(II) ions from aqueous solutions has been investigated prior and after MnO 2 surfacedeposition. The removal efficiency has been studied as a function of pH, Cu(II) concentration, ionic strength, temperature and contact time. In addition, the biochar fibers have been characterized by Fourier transform infrared spectroscopy studies to elucidate the adsorption mechanism. Evaluation of the experimental data indicated that the MnO 2 -composite product presents higher adsorption capacity, which is attributed to the formation of inner-sphere surface complexes, and that the adsorption reaction is a relatively fast and endothermic process. The results of the present study reveal that MnO 2 -biochar composites could be used as very effective adsorbents for the removal of bivalent metal-ions from contaminated waters.

show abstract

Section: Introductionmentioning

confidence: 99%