Demobilization of Heavy Metals from Mine Waters

Biosorption of manganese onto chitin and associated proteins during the treatment of mine impacted water

“…Although most authors agree on the fact that this biosorption could be a transient phenomenon, results show a great sorption capacity for a variety of substrates, and some authors have recently suggested that it be used as the sole mechanism for remediation of MIW. Inexpensive sorbents like fly ash, red mud, pine bark, bentonite, zeolites [17], palm fruit bunch, maize cob [18], vegetable compost [13], lignite [19], and rice husk [20] have been tested with promising results. Utgikar et al [21] also suggested applying metal adsorption as a preliminary step to decrease metal concentrations prior to biological sulfate reduction to prevent microbial inhibition due to metal toxicity.…”

Factors affecting adsorption characteristics of Zn2+ on two natural zeolites

“…The increasing demand for alkaline zinc manganese batteries, instead of mercury based ones, brings serious problems when those batteries are not disposed off properly [1,2]. Yet, another source of contamination can be due to the flooding of ore mines into the environment [3,4]. Since heavy metals have toxic effects on the environment and public life, many researchers suggest a costeffective process, such as ion exchange, for removing dissolved heavy metals from wastewaters by using naturally occurring materials [5][6][7][8][9][10][11][12][13].…”

“…Zeolites are hydrated aluminosilicates of alkali and alkaline earth elements with unique crystal structures consisting of a three-dimensional framework of SiO 4 and AlO 4 tetrahedral [14,15]. This structure causes zeolite to have negatively charged surface.…”

Review on the Removal of Metal Ions from Effluents Using Seaweeds, Alginate Derivatives and Other Sorbents

“…However, many research papers have shown the efficiency of biosorbents for the removal of metal ions from industrial wastewaters and acid mine drainage solutions (MCGREGOR et al, 1998;UTGIKAR et al, 2000;ZOUMIS et al, 2000), landfill leachates (ABOLLINO et al, 2003;CECEN and GURSOY, 2001), tannery wastewaters (ALVES et al, 1993), electroplating effluents (AJMAL et al, 1996(AJMAL et al, , 2000ALVAREZ-AYUSO et al, 2003;LO et al, 2003), acid leachates from sewage sludge decontamination (FISET et al, 2002), acid leachates from soil decontamination (MEUNIER et al, 2004), and alkaline leachates from air pollution control residues from municipal solid waste incinerators (BLAIS et al, 2002a, BLAIS et al, 2002b.…”