Adsorbent materials from paper industry waste materials and their use in Cu(II) removal from water

Abstract

Keywords:Paper industry waste materials Pyrolysis Adsorbent This paper deals with the removal of Cu 2+ from water using adsorbent materials prepared from paper industry waste materials (one de-inking paper sludge and other sludge from virgin pulp mill). Experimental results showed that de-inking paper sludge leads to mesoporous materials (V mic /Vr = 0.13 and 0.14), whereas the sludge from virgin pulp mill produces high microporous adsorbents (V m j C /V T = 0.39 and 0.41). Adsorbent materials were then used for Cu 2+ removal from water at acid pH. During water treatment, heavy metals lixiviation from adsorbent materials was not produced. However, important Ca and Mg leaching was observed. Final pH significantly increases after treatment of water with adsorbent materials probably due to their elevated CaCCb content. In general, highest Cu 2+ removal was obtained using adsorbent materials from de-inking paper sludge. This result could be due to their higher content in oxygenated surface groups, high average pore diameter, elevated superficial charge density, high CaCC>3 amount and high Ca and Mg exchange content.

Use of phytoremediation and biochar to remediate heavy metal polluted soils: a review

“…Also oxygen functional groups are known to stabilise heavy metals in the biochar surface, particularly (Uchimiya et al, 2011c) for softer acids like Pb +2 and Cu +2 . In addition, Méndez et al (2009) observed that Cu +2 sorption was related to the elevated oxygenated surface groups and also with high average pore diameter, elevated superficial charge density and Ca +2 and Mg +2 exchange content of biochar. Possibly, sorption mechanisms are highly dependent on soil type and the cations present in both biochar and soil.…”

Review of Eco-Friendly Biochar Used in the Removal of Trace Metals on Aqueous Phases

“…Also oxygen functional groups are noted to have stabilised trace metals in a biochar surface, mostly for softer acids like Cu 2+ and Pb 2+ [67,70]. Furthermore, Cu 2+ adsorption was reported to have related to the higher oxygenated surface groups and also with high average pore diameter, higher superficial charge density and Ca 2+ and Mg 2+ exchange content of the biochar [73].…”

Nanocomposite carbon-bearing sorption material

“…A growing demand for inexpensive sorption materials capable of meeting the requirements specifications stimulates the development of new ways to obtain sorbents [5]. The most efficient in eco-economic trend of research is the development of new inexpensive effective sorbents based on industrial waste that allows decreasing anthropogenic load on the environment in many directions [6][7][8][9][10][11][12].…”