The removal of As(III) and As(V) from aqueous solutions by waste materials

Rahaman, Md. Saifur; Basu, Avijit; Islam, M.R.

doi:10.1016/j.biortech.2007.06.038

Cited by 112 publications

(61 citation statements)

References 29 publications

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“…). Thus, biosorption might occur between adsorbate and adsorbent (Sari and Tuzen 2009;Rahaman et al 2008). The results of this study showed that Cd might have bound to applied organic amendments that helped in 95 % Cd removal after 13 h from artificially Cd-polluted water.…”

Section: Cadmium Removal Efficiency Of Organic Amendmentsmentioning

confidence: 81%

Organic amendments: effects on cereals growth and cadmium remediation

Ahmad

Akhtar

Zahir

et al. 2014

Int. J. Environ. Sci. Technol.

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Cadmium (Cd) is one of the toxic metals that adversely affect plant growth. Organic amendments may not only enhance nutrient status of soil, but they may also form complexes with Cd and reduce its availability to plants. This experiment was conducted to determine whether organic amendments (compost and biogas slurry) could stabilize/extract Cd and alleviate the adverse effects of Cd on the growth of two cereals, wheat and maize. Organic amendments along with four varying levels of Cd (0, 5, 20, 50 mg kg -1 soil) were prepared with soil. Effect of these amendments on tolerance indices, root/shoot dry biomass, tissue Cd concentration, Cd uptake and translocation were studied. Biogas slurry caused maximum increase in tolerance indices of wheat and maize (100-112 and 117-133 %, respectively, as compared to control), whereas compost caused significant increase in their dry biomass. Negative correlation between root dry biomass of wheat (r = -0.37) and maize (r = -0.53) to Cd revealed its suppressive effects. Dry biomass of plant correlated with organic amendments in wheat (r = 0.83-0.98), whereas weak correlation was observed in maize (r = 0.30-0.40). Compost significantly reduced Cd uptake in wheat and maize; however, it increased Cd translocation in plants. Based on the results of this study, root was the major sink of Cd when soil was amended with or without organic amendments. Biogas slurry removed 97 % Cd from artificially polluted water after 13 h at pH 6. The additions of compost in soil and biogas slurry in wastewater are recommended to stabilize/extract Cd.

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Section: Cadmium Removal Efficiency Of Organic Amendmentsmentioning

confidence: 81%

Organic amendments: effects on cereals growth and cadmium remediation

Ahmad

Akhtar

Zahir

et al. 2014

Int. J. Environ. Sci. Technol.

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“…Nowadays, there is a trend to use the alternative and low-cost materials for arsenic removal from the waters in laboratory or medium-scale experiments. Effectiveness of chemically modified or native biomass in processes of arsenic removal was evaluated and proved by various authors (Abdel-Ghani et al, 2007;Boddu et al, 2008;Cernansky et al, 2007;Loukidou et al, 2003;Malakootian et al, 2009;Murugesan et al, 2006;Rahaman et al, 2008;Seki et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Removal of arsenic (V) from aqueous solutions using chemically modified sawdust of spruce (Picea abies): Kinetics and isotherm studies

Urík

Littera

Ševc

et al. 2009

Int. J. Environ. Sci. Technol.

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ABSTRACT:Arsenic is a ubiquitous element in the environment and occurs naturally in both organic and inorganic forms. Under aerobic condition, the dominant form of arsenic in waters is arsenate, which is highly mobile and toxic. Arsenic poisoning from drinking water remains a serious world health issue. There are various standard methods for arsenic removal from drinking waters (coagulation, sorption, ion-exchange reactions or methods of reverse osmosis) and alternative methods, such as biosorption. Biosorption of arsenic from natural and model waters by native or chemically modified (with urea or ferric oxyhydroxides) plant biomass prepared from sawdust of Picea abies was studied. The kinetic of the adsorption process fitted well the pseudo second order adsorption model and equilibrium was achieved after 2 h. The results showed that biosorption was well described by both Langmuir and Freundlich isotherms. The maximum biosorption capacity of the sawdust modified with ferric oxyhydroxides, evaluated by Langmuir adsorption model, was 9.259 mg/g, while the biosorption capacity of unmodified biosorbent or biosorbent modified with urea was negligible. The adsorption capacity is comparable to results published by other authors, suggesting that the prepared chemically modified biosorbent has potential in remediation of contaminated waters.

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“…Both organic and inorganic compounds of arsenic are present in the environment. The inorganic arsenic is highly toxic (Rahaman et al, 2008). In high concentrations, arsenic poisoning can also lead to an acute condition called arsenicosis (Hering et al, 1997;Gregor, 2001;Saha et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…Conventional methods for removal of iron, arsenic and coliform bacteria involve coagulation followed by separation of the produced insoluble settling or by direct filtration through sand beds. Arsenic removal by various methods includes reverse osmosis, ion exchange, lime softening, flotation and adsorption on iron oxides or activated alumina (Kartinen and Martin, 1995); waste materials (Rahaman et al, 2008); iron oxide fungal biomass (Pokhrel and Viraraghavan, 2008), aquatic macrophytes (Rai et al, 1995) and hydrous ferric oxide (HFO) (Nemade et al, 2007). These conventional water treatment methods are not affordable in rural communities of developing countries.…”

Section: Introductionmentioning

confidence: 99%