A review on economically adsorbents on heavy metals removal in water and wastewater

Lim, Ai Phing; Aris, Ahmad Zaharin

doi:10.1007/s11157-013-9330-2

Cited by 228 publications

(87 citation statements)

References 114 publications

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“…Some factors are influence in the process of adsorption of heavy metal into adsorbents such as pH, adsorbent dosage, initial concentration, contact time and temperature [25]. Removal efficiency of heavy metals can be described as following equation [19]:…”

Section: Factor Affecting Adsorption Of Heavy Metal By Geopolymeric Amentioning

confidence: 99%

Review on Adsorption of Heavy Metal in Wastewater by Using Geopolymer

et al. 2017

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Abstract. Rapid development of advanced technology in Malaysia gave impact increasing in the accumulation of heavy metal every day in our daily life through wastewater. Long term exposure of human bodies to heavy metals susceptible to receives various infections and diseases. From an environmental and economic perspective, adsorption is acceptable process that can be applied in wastewater treatment. However, usage of activated carbon most acknowledged and costly adsorbents lead people to find an alternative to activated carbon. Several studies of physical properties of geopolymer make them gain attention to replace an activated carbon in the treatment of heavy metal. This paper review adsorption of heavy metal by using geopolymer.

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Section: Factor Affecting Adsorption Of Heavy Metal By Geopolymeric Amentioning

confidence: 99%

Review on Adsorption of Heavy Metal in Wastewater by Using Geopolymer

et al. 2017

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“…, an unavoidable method of two-steps treatment with different adsorbents was applied, which was certainly time consuming and tedious [24]. Hence, it is significant to develop an adsorbent with the ability of simultaneous removal of Cu(II) and Cr 2 O 7 2À from wastewater.…”

Section: àmentioning

confidence: 99%

Efficient simultaneous removal of Cu(II) and Cr2O72− from aqueous solution by a renewable amphoteric functionalized mesoporous silica

You

et al. 2015

Chemical Engineering Journal

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“…Conventional methods for removing heavy metals from water include chemical precipitation, coagulation, flocculation, ion exchange, membrane filtration, and activated carbon adsorption [1,2]. However, these treatments tend to have high costs, leave residuals, and do not completely remove the pollutants.…”

Section: Introductionmentioning

confidence: 99%

Effects of Bentonite Activation Methods on Chitosan Loading Capacity

Fan

et al. 2017

Bull. Chem. React. Eng. Catal.

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The adsorption capacity of bentonite clay for heavy metal removal from wastewater can be significantly enhanced by a high loading of chitosan on the surface. In order to enhance the chitosan loading, we tested activating bentonite clay by three methods prior to chitosan loading: sulfuric acid, calcination, and microwave treatments. Meanwhile, several parameters during chitosan loading, namely the initial chitosan concentration, stirring speed, reaction time, temperature, and pH value were investigated. Our results indicate that chitosan is attached to bentonite clay through intercalation and surface adsorption according to X-ray Diffraction (XRD), Scanning Eelectron Microscopy (SEM), and Fourier Transform Infrared Spectroscopy (FTIR) analyses. The maximum chitosan loading on 200-mesh raw bentonite clay (126.30 mg/L) was achieved under the following conditions: the initial chitosan concentration of 1000 mg/L, the stirring speed of 200 rpm, pH of 4.9, 60 min of reaction time, and temperature of 30 °C. The chitosan loading was further increased to 256.30, 233.70, and 208.83 mg/g, when using bentonite clay activated through 6 min of microwave irradiation (800 W), 10 % sulfuric acid treatment, and calcinations at 600 °C, respectively. When the chitosan loading was increased from 34.76 to 233.7 mg/g, the removal percentages of Cu(II), Cr(VI), and Pb(II) were improved, respectively from 78.90 to 95.5 %, from 82.22 to 98.74 %, from 60.09 to 86.18 %.

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A review on economically adsorbents on heavy metals removal in water and wastewater

Cited by 228 publications

References 114 publications

Review on Adsorption of Heavy Metal in Wastewater by Using Geopolymer

Review on Adsorption of Heavy Metal in Wastewater by Using Geopolymer

Efficient simultaneous removal of Cu(II) and Cr2O72− from aqueous solution by a renewable amphoteric functionalized mesoporous silica

Effects of Bentonite Activation Methods on Chitosan Loading Capacity

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