TY - JOUR VL - 179 JF - Journal of Hazardous Materials A1 - Mohammad, M. A1 - Maitra, S. A1 - Ahmad, N. A1 - Bustam, A. A1 - Sen, T.K. A1 - Dutta, B.K. N1 - cited By 84 UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-77952779842&doi=10.1016%2fj.jhazmat.2010.03.014&partnerID=40&md5=7c47340881d0f9153928aef39ed14f12 Y1 - 2010/// AV - none SP - 363 EP - 372 ID - scholars1223 IS - 1-3 KW - Adsorbent dosage; Adsorption capacities; Adsorption equilibria; Adsorption process; Aqueous solutions; Best fit; Contact time; Dubinin-Radushkevich; Freundlich; Initial adsorption; Langmuir isotherm; Langmuirs; Metal ion removal; Pseudo-second order model; Solution pH; Three stages KW - Adsorbents; Adsorption isotherms; Cadmium; Chemicals removal (water treatment); Chemisorption; Dyes; Leaching; Metal ions; Metals; Monolayers; Seed; Zinc; Zinc compounds KW - Adsorption KW - cadmium; metal ion; zinc ion KW - adsorption; aqueous solution; cadmium; concentration (composition); heavy metal; pollutant removal; reaction kinetics; zinc KW - adsorption; aqueous solution; article; concentration (parameters); desorption; equilibrium constant; heavy metal removal; isotherm; kinetics; particle size; pH; physic seed hull; physical chemistry; temperature; time; waste component removal KW - Adsorption; Buffers; Diffusion; Electrochemistry; Hydrogen-Ion Concentration; Jatropha; Kinetics; Metals KW - Heavy; Microscopy KW - Electron KW - Scanning; Particle Size; Porosity; Seeds; Solutions; Spectroscopy KW - Fourier Transform Infrared; Thermodynamics; Water; Water Pollutants KW - Chemical; Water Purification TI - Metal ion removal from aqueous solution using physic seed hull SN - 03043894 N2 - The potential of physic seed hull (PSH), Jantropha curcas L. as an adsorbent for the removal of Cd2+ and Zn2+ metal ions from aqueous solution has been investigated. It has been found that the amount of adsorption for both Cd2+ and Zn2+ increased with the increase in initial metal ions concentration, contact time, temperature, adsorbent dosage and the solution pH (in acidic range), but decreased with the increase in the particle size of the adsorbent. The adsorption process for both metal ions on PSH consists of three stages-a rapid initial adsorption followed by a period of slower uptake of metal ions and virtually no uptake at the final stage. The kinetics of metal ions adsorption on PSH followed a pseudo-second-order model. The adsorption equilibrium data were fitted in the three adsorption isotherms-Freundlich, Langmuir and Dubinin-Radushkevich isotherms. The data best fit in the Langmuir isotherm indication monolayer chemisorption of the metal ions. The adsorption capacity of PSH for both Zn2+ and Cd2+ was found to be comparable with other available adsorbents. About 36-47 of the adsorbed metal could be leached out of the loaded PSH using 0.1M HCl as the eluting medium. © 2010 Elsevier B.V. ER -