Removal of Mercury from Aqueous Solutions by Adsorption to Rice Husks

Khalid, Nasir; Ahmad, Shujaat; Kiani, Seema Naseer; Ahmed, Jamil

doi:10.1081/ss-100100827

Cited by 65 publications

(28 citation statements)

References 26 publications

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“…A number of plant materials or agricultural residues have been used largely as adsorbents for the removal of Cu(II) from water and wastewater (Bulut and Tez 2007). These include peat (Lodenius et al 1983), bark (Vanquez et al 2002), cellulose (Navarro et al 1996), lignite (Eligwe et al 1999), coconut husks (Hasany et al 2003), rice husk (Khalid et al 1999), vegetables (Ponomarev et al 1997), tea leaves (Kiyohara et al 2003), baggase fly ash (Gupta and Ali 2000), peanut hull carbon (Periasamy and Namasivayam 1996), pine bark (Al-Asheh et al 2003), sphagnum moss peat (McKay 2000) etc.…”

Section: Introductionmentioning

confidence: 99%

Adsorption studies of Cu(II) on Boston fern (Nephrolepis exaltata Schott cv. Bostoniensis) leaves

Rao

Khan

2016

Appl Water Sci

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Adsorption studies were done on Boston fern leaves for the effective removal of Cu(II) ions from aqueous solution. It has been tested for the first time for heavy metal adsorption from aqueous solution. This promising material has shown remarkable adsorption capacity towards Cu(II) ions which confirm its novelty, ease of availability, non-toxic nature, cheapness, etc., and give the main innovation to the present study. The adsorbent was analyzed by FT-IR, SEM and EDS. The effect of pH, contact time, initial metal ion concentration and temperature on the adsorption was investigated using batch process to optimize conditions for maximum adsorption. The adsorption of Cu(II) was maximum (96 %) at pH 4. The experimental data were analyzed by Langmuir, Freundlich and Tempkin isotherms. The kinetic studies of Cu(II)were carried out at room temperature (30°C) in the concentration range 10-100 mg L -1 . The data obtained fitted well with the Langmuir isotherm and pseudo-secondorder kinetics model. The maximum adsorption capacity (q m ) obtained from Langmuir adsorption isotherm was found to be 27.027 mg g -1 at 30°C. The process was found to be exothermic and spontaneous in nature. The breakthrough and exhaustive capacities were found to be 12.5 and 37.5 mg g -1 , respectively. Desorption studies showed that 93.3 % Cu(II) could be desorbed with 0.1 M HCl by continuous mode.

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Section: Introductionmentioning

confidence: 99%

Adsorption studies of Cu(II) on Boston fern (Nephrolepis exaltata Schott cv. Bostoniensis) leaves

Rao

Khan

2016

Appl Water Sci

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“…In recent years, agricultural by products have been widely studied for metal removal from water. These include peat, wood, pine bark, banana pith, soybean, cottonseed hulls, peanut, shells, hazelnut shell, rice husk (RH), sawdust, wool, orange peel, compost and leaves (Khalid et al 1999;Wan Ngah et al 2007;Feng et al 2011). As a low cost, mango leaves powder (MLP) and rick husk is an attractive and inexpensive option for the biosorption removal of dissolved metals.…”

Section: Introductionmentioning

confidence: 99%

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

Kamsonlian

Suresh

Ramanaiah

et al. 2012

Int. J. Environ. Sci. Technol.

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The present study deals with the biosorption of As(III) from aqueous solution using mango leaves powder (MLP) and rice husk (RH) in a batch operation. Scanning electron microscopy and Fourier transformation infrared spectrometry analysis shows the surface texture of biosorbents and metal binding of functional groups of before and after biosorption of As(III). The optimum pH was obtained at 7 and 6 with 7 and 6 g/l of dosage of MLP and RH, respectively. The adsorption of As(III) onto MLP and RH was favourably influenced by an increase in temperature. Equilibrium data were well represented by the Freundlich isotherm model. Nitric acid and ethylenediaminetetra acetic acid was found to be a better eluant for the desorption followed by hydrochloric acid and sodium hydroxide of As(III) with a maximum desorption efficiency of 69.5, 48.5 and 79.4, 86.3 %, respectively. The pseudosecond-order kinetic model was found to best fitted of the experimental data over the equilibrium time at 32 h. The positive values of heat of adsorption (23.89 kJ/mol for MLP and 52.26 kJ/mol for RH) indicate the endothermic nature of the adsorption process. The thermodynamic study showed the spontaneous nature of the sorption of As(III) onto MLP and RH.

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“…Acceleration of some originally slow step(s) 23 creation of some new activation sites on the adsorbent surface 24 and decrease in the size of the adsorbing species. 25 This could well occur due to progressive desolvation of the adsorbing ion as the solution temperature increases.…”

Section: Effect Of Temperaturementioning

confidence: 99%

Sorption of Ni(II), Cu(II) and Fe(III) ions from Aqueous Solutions Using Activated Carbon

Hanafi¹,

Hassan²

2010

Journal of the Korean Chemical Society

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ABSTRACT. An activated carbon was tested for its ability to remove transition metal ions from aqueous solutions. Physical, chemical and liquid-phase adsorption characterizations of the carbon were done following standard procedures. Studies on the removal of Ni(II), Cu(II) and Fe(III) ions were attempted by varying adsorbate dose, pH of the metal ion solution and time in batch mode. The equilibrium adsorption data were fitted with Freundlich and Langmuir and the isotherm constants were evaluated, equilibrium time of the different three metal ions were determined. pH was found to have a significant role to play in the adsorption. The processes were endothermic and the thermodynamic parameters were evaluated. Desorption studies indicate that ion-exchange mechanism is operating.

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Removal of Mercury from Aqueous Solutions by Adsorption to Rice Husks

Cited by 65 publications

References 26 publications

Adsorption studies of Cu(II) on Boston fern (Nephrolepis exaltata Schott cv. Bostoniensis) leaves

Adsorption studies of Cu(II) on Boston fern (Nephrolepis exaltata Schott cv. Bostoniensis) leaves

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

Sorption of Ni(II), Cu(II) and Fe(III) ions from Aqueous Solutions Using Activated Carbon

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