Next Article in Journal
Determination of Johnson–Cook Constitutive Parameters for Cutting Simulations
Next Article in Special Issue
Roasting Pretreatment Combined with Ultrasonic Enhanced Leaching Lead from Electrolytic Manganese Anode Mud
Previous Article in Journal
Electromagnetic Forces in Continuous Casting of Steel Slabs
Previous Article in Special Issue
Characterization of Double Leached Waelz Oxide for Identification of Fluoride Mineral
Article Menu
Issue 4 (April) cover image

Export Article

Open AccessArticle

Modified Leach Residues from Processing Deep-Sea Nodules as Effective Heavy Metals Adsorbents

Department of Metals and Corrosion Engineering, University of Chemistry and Technology Prague, Technická 5, 16628 Prague, Czech Republic
Interoceanmetal Joint Organization IOM, Cyryla i Metodego 9, 71-541 Szczecin, Poland
Author to whom correspondence should be addressed.
Metals 2019, 9(4), 472;
Received: 14 March 2019 / Revised: 13 April 2019 / Accepted: 18 April 2019 / Published: 23 April 2019
(This article belongs to the Special Issue Metal Removal and Recycling)
PDF [4361 KB, uploaded 26 April 2019]
  |     |  


The possible use of leaching residue from leaching deep-sea nodules in SO2/H2SO4/H2O medium as a low-cost adsorbent of heavy metals (Pb(II), Cd(II), Cu(II), Ni(II), Co(II), As(V)) was studied. The leaching residue was found to be an effective adsorbent for all of the tested elements; however, it was inactive in the solution containing As(V). The chemical activation of adsorbent in 10 vol. % HCl resulted in the greatest improvement of adsorption properties, while the activation in 10 vol. % HNO3 and heat treatment at 250 °C did not significantly affect the sorption characteristics of treated adsorbents compared with the original leaching residue. After HCl activation, the maximal adsorption capacities for lead (12.0 mg/g at pH 5.0 after 1 h), nickel (3.1 mg/g at pH 5.5 after 4 h) and cobalt (2.0 mg/g at pH 5.0 after 2 h) were achieved. Additional mechanical treatment connected with HCl activation provided the highest adsorption capacities for cadmium (11.5 mg/g at pH 4.0) and copper (5.7 mg/g at pH 4.5). Coprecipitation of Fe/Al-based particles on the surface of the leaching residue increased As(V) removal of the adsorbent. Surface coating based on AlIII was extremely effective, causing the increase of the adsorption capacity from 0 with the original leaching residue, to 28.1 mg/g (pH 7.0, 24 min). Kinetics studies showed the rapid progress of adsorption for Pb(II), Cd(II), and As(V) in tens of minutes, while the adsorption of Cu(II), Ni(II) and Co(II) approached a steady state after 2 h. View Full-Text
Keywords: deep-sea nodules; leaching residue; adsorption; heavy metals deep-sea nodules; leaching residue; adsorption; heavy metals

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Vu, N.H.; Kristianová, E.; Dvořák, P.; Abramowski, T.; Dreiseitl, I.; Adrysheva, A. Modified Leach Residues from Processing Deep-Sea Nodules as Effective Heavy Metals Adsorbents. Metals 2019, 9, 472.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top