1. The impregnation of nanomaterials into permeable/porous materials or surface
coatings (Chang and Chen 2005). Widely utilized host substrates are stimulated
carbon (Kikuchi et al. 2006), bentonite (Eren et al. 2010), sand (Boujelben et al.
2010), alumina films (Hulteen et al. 1997), and resins (Pan et al. 2010). With
respect to surface coating, there are many reports referencing that a thicker
surface modifiers may decrease the response rate, although removal limit was
upgraded because of an expanded number of active sites (Tang and Lo 2013).
Therefore, trade off among reactivity and stability must be focused well.
2. Prepare micro- Nano hierarchically organized sorbents, that can adjust high
adsorption limit and stability of nanoparticle (Zhu et al. 2012).
6.12 Conclusions
In the last decades, many examinations have demonstrated that consuming arsenicpolluted water ought to be the most significant worries for the strength of humanity.
Along these lines, systems to evade the groundwater arsenic pollution and additionally
to mitigate the effect of such tainting should be created trying to diminish the health
dangers related to the admission of arsenic-polluted water. This chapter discussed in
detail the chemistry and toxicity of arsenic and required conventional techniques to
remove arsenic metal ions from drinking water. Focus was given to the conventional
adsorption method which includes the mechanism, type of adsorption, and adsorption
models. Analysis and modelling of small-scale column study is also discussed with
various metal oxides being used in this study. Mainly, this chapter focused on two
main concerns: (1) the possibility of metal oxide-based nanomaterials as an active
adsorbent of arsenic expulsion for the utilization drinking water filtration systems, and
(2) measuring the effects of variables such as arsenic initial concentration, adsorbents
dosage, competing solute and solution pH. Additionally, a brief overview has also
been given for the disposal of arsenic contaminated materials, regeneration and reuse
of absorbents. In addition, other than the utilization of nanomaterials for the arsenicexpulsion water treatment, other novel permeable adsorbents have been explained
which could go about as predominant adsorbent materials sooner rather than later
because of their remarkable attributes
References
Abdus-Salam N, Adekola F (2005) The influence of pH and adsorbent concentration on adsorption
of lead and zinc on a natural goethite. Afr J Sci Technol 6:55
Adepoju-Bello AA, Alabi O (2005) Heavy metals: a review. Nig J Pharm 37:41–45
Adepoju-Bello A, Ojomolade O, Ayoola G, Coker H (2009) Quantitative analysis of some toxic
metals in domestic water obtained from Lagos metropolis. Nig J Pharm 42:57–60
Adewole AT (2009) Waste management towards sustainable development in Nigeria: a case study
of Lagos state. Int NGO J 4:173–179
Adeyemi O, Oloyede O, Oladiji A (2007) Physicochemical and microbial characteristics of
leachate-contaminated groundwater. Asian J Biochem 2:343–348
6 Metal Oxides for Removal of Arsenic Contaminants from Water
185
coatings (Chang and Chen 2005). Widely utilized host substrates are stimulated
carbon (Kikuchi et al. 2006), bentonite (Eren et al. 2010), sand (Boujelben et al.
2010), alumina films (Hulteen et al. 1997), and resins (Pan et al. 2010). With
respect to surface coating, there are many reports referencing that a thicker
surface modifiers may decrease the response rate, although removal limit was
upgraded because of an expanded number of active sites (Tang and Lo 2013).
Therefore, trade off among reactivity and stability must be focused well.
2. Prepare micro- Nano hierarchically organized sorbents, that can adjust high
adsorption limit and stability of nanoparticle (Zhu et al. 2012).
6.12 Conclusions
In the last decades, many examinations have demonstrated that consuming arsenicpolluted water ought to be the most significant worries for the strength of humanity.
Along these lines, systems to evade the groundwater arsenic pollution and additionally
to mitigate the effect of such tainting should be created trying to diminish the health
dangers related to the admission of arsenic-polluted water. This chapter discussed in
detail the chemistry and toxicity of arsenic and required conventional techniques to
remove arsenic metal ions from drinking water. Focus was given to the conventional
adsorption method which includes the mechanism, type of adsorption, and adsorption
models. Analysis and modelling of small-scale column study is also discussed with
various metal oxides being used in this study. Mainly, this chapter focused on two
main concerns: (1) the possibility of metal oxide-based nanomaterials as an active
adsorbent of arsenic expulsion for the utilization drinking water filtration systems, and
(2) measuring the effects of variables such as arsenic initial concentration, adsorbents
dosage, competing solute and solution pH. Additionally, a brief overview has also
been given for the disposal of arsenic contaminated materials, regeneration and reuse
of absorbents. In addition, other than the utilization of nanomaterials for the arsenicexpulsion water treatment, other novel permeable adsorbents have been explained
which could go about as predominant adsorbent materials sooner rather than later
because of their remarkable attributes
References
Abdus-Salam N, Adekola F (2005) The influence of pH and adsorbent concentration on adsorption
of lead and zinc on a natural goethite. Afr J Sci Technol 6:55
Adepoju-Bello AA, Alabi O (2005) Heavy metals: a review. Nig J Pharm 37:41–45
Adepoju-Bello A, Ojomolade O, Ayoola G, Coker H (2009) Quantitative analysis of some toxic
metals in domestic water obtained from Lagos metropolis. Nig J Pharm 42:57–60
Adewole AT (2009) Waste management towards sustainable development in Nigeria: a case study
of Lagos state. Int NGO J 4:173–179
Adeyemi O, Oloyede O, Oladiji A (2007) Physicochemical and microbial characteristics of
leachate-contaminated groundwater. Asian J Biochem 2:343–348
6 Metal Oxides for Removal of Arsenic Contaminants from Water
185