Removal of mercury from water by carbonaceous sorbents derived from walnut shell

Zabihi, Mohammad; Ahmadpour, Ali; Asl, Ali Haghighi

doi:10.1016/j.jhazmat.2008.12.108

Cited by 159 publications

(82 citation statements)

References 34 publications

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“…This may be attributed to fact that for higher initial concentration, more efficient utilization of sorption sites is expected due to the great driving force of the concentration gradient in order to overcome all mass transfer resistance of HM ions between the aqueous and solid phases [21]. M. Zabihi et al reported that the increase in the HMs uptake capacity of AC (Derived from Wanut sell) with increasing initial ion concentration may be due to the higher collision probability between HMs ions and AC particles [28]. For the samples with higher initial concentration of 200 mg/l, the removal percentage was high for both Cu(II) and Pb(II).…”

Section: Effect Of Contact Time and Initial Hm Concmentioning

confidence: 99%

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Adsorption of Pb (II) and Cu (II) from Aqueous Solution onto Activated Carbon Prepared from Dates Stones

Abudaia¹,

Sulyman²,

Elazaby³

et al. 2013

IJESD

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Abstract-Potentially toxic trace elements such as Lead Pb(II) and Copper Cu (II), with high levels in water are very serious problem in many places around the world, sometimes in relation to natural sources and in other cases to anthropogenic ones. Adsorption process is among the most effective techniques for removing of many heavy metal (HM) ions from different types of water. In this study, an attempt has been made to investigate the efficiency of granular activated carbon (GAC) and powder activated carbon (PAC) obtained from easy available agricultural by-products dates stones (DS) in removing of Pb (II), Cu (II) from their aqueous solutions using batch mode technique. During the removal process, the effects of solution pH, HM concentrations and contact time, and adsorbent concentration, on adsorption efficiency by both GAC & PAC were studied. Under the experimental conditions, the removal efficiency of such metals by PAC was 83%, 91% showing preference over GAC which had a removal efficiency of 76%, 82% respectively. Index Terms-Activated carbon, date stones, heavy metals, batch mode technique, adsorption.

show abstract

Section: Effect Of Contact Time and Initial Hm Concmentioning

confidence: 99%

“…However, the time to reach equilibrium adsorption was quite longer and might be more than the 40 min used at the experiment. The rapid adsorption and removal of HMs by Adsorbents is one of the important factors very well considered when seeking economical wastewater treatment plants [28]. Fig.…”

Section: Effect Of Contact Time and Initial Hm Concmentioning

confidence: 99%

Adsorption of Pb (II) and Cu (II) from Aqueous Solution onto Activated Carbon Prepared from Dates Stones

Abudaia¹,

Sulyman²,

Elazaby³

et al. 2013

IJESD

View full text Add to dashboard Cite

show abstract

“…The adsorption kinetic of Hg 2+ and MeHg was studied according to pseudo-first-order and pseudo-second-order adsorption equations [35][36][37]. The pseudo-first-order equation is given as:…”

Section: Kinetic Modelsmentioning

confidence: 99%

Removal of Hg²⁺ and methylmercury in waters by functionalized multi-walled carbon nanotubes: adsorption behavior and the impacts of some environmentally relevant factors

Zhang

Yin

Liu

2017

Chemical Speciation & Bioavailability

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Adsorption of Hg2+ and methylmercury (MeHg) to multi-walled carbon nanotubes (MWCNTs) modified, respectively, with hydroxyl, amine and carboxyl groups was studied. The effect of various factors like the initial pH, natural organic matter (NOM), Cl -and adsorbent dose on the sorption efficiency were evaluated. It was found that amine-modified MWCNTs showed a strong adsorption capacity to Hg 2+ and MeHg, and the removal efficiency could reach up to 92% (0.5 g/L MWCNTs, and 100 μg/L Hg 2+ and MeHg) which is independent of pH.

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“…Among treatment approaches, adsorption is an effective technology for removal of Hg (II) ions from wastewater or other aqueous solutions [2][3][4]. Activated carbon (AC) is an excellent adsorbent due to its high surface area, well-developed internal pore structure, and tunable surface chemistry [5].…”

Section: Introductionmentioning

confidence: 99%

Efficient adsorption of Hg (II) ions in water by activated carbon modified with melamine

Qin¹,

Meng²,

Chen³

2018

AIP Conference Proceedings

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Abstract. Removal of Hg (II) ions from industrial wastewater is important for the water treatment, and adsorption is an efficient treatment process. Activated carbon (AC) was modified with melamine, which introduced nitrogen-containing functional groups onto AC surface. Original AC and melamine modified activated carbon (ACM) were characterized by elemental analysis, N2 adsorption-desorption, determination of the pH of the point of zero charge (pHpzc) and X-ray photoelectron spectroscopy (XPS) and their performance in the adsorption of Hg(II) ions was investigated. Langmuir model fitted the experimental data of equilibrium isotherms well. ACM showed the higher Hg (II) ions adsorption capacity, increasing more than more than 1.8 times compared to the original one. Moreover, ACM showed a wider pH range for the maximum adsorption than the parent AC.

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Removal of mercury from water by carbonaceous sorbents derived from walnut shell

Cited by 159 publications

References 34 publications

Adsorption of Pb (II) and Cu (II) from Aqueous Solution onto Activated Carbon Prepared from Dates Stones

Adsorption of Pb (II) and Cu (II) from Aqueous Solution onto Activated Carbon Prepared from Dates Stones

Removal of Hg²⁺ and methylmercury in waters by functionalized multi-walled carbon nanotubes: adsorption behavior and the impacts of some environmentally relevant factors

Efficient adsorption of Hg (II) ions in water by activated carbon modified with melamine

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Removal of mercury from water by carbonaceous sorbents derived from walnut shell

Cited by 159 publications

References 34 publications

Adsorption of Pb (II) and Cu (II) from Aqueous Solution onto Activated Carbon Prepared from Dates Stones

Adsorption of Pb (II) and Cu (II) from Aqueous Solution onto Activated Carbon Prepared from Dates Stones

Removal of Hg2+ and methylmercury in waters by functionalized multi-walled carbon nanotubes: adsorption behavior and the impacts of some environmentally relevant factors

Efficient adsorption of Hg (II) ions in water by activated carbon modified with melamine

Contact Info

Product

Resources

About

Removal of Hg²⁺ and methylmercury in waters by functionalized multi-walled carbon nanotubes: adsorption behavior and the impacts of some environmentally relevant factors