Adsorptive removal of Cr(VI) by Fe-modified steam exploded wheat straw

Li, Chun; Chen, Hongzhang; Li, Zuohu

doi:10.1016/s0032-9592(03)00087-6

Cited by 93 publications

(43 citation statements)

References 5 publications

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“…Several treatment techniques have been used for the removal of Cr(VI) from wastewater; this includes techniques such as membrane separation (Bhowal et al 2012), electrocoagulation (Zongo et al 2009), solvent extraction (Venkateswaran and Palanivelu 2004), reduction , reverse osmosis (Chun et al 2004), adsorption (Behnajady and Bimeghdar 2014), and photoreduction (Behnajady et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Chromium(VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom

Ghorbani-Khosrowshahi

Behnajady

2016

Int. J. Environ. Sci. Technol.

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In this research, the stems of Onopordom Heteracanthom which is a kind of weed were converted to biochar particles, and their characteristics were investigated. The morphology and purity of these particles were examined by SEM and EDX techniques, respectively. Specific surface area was obtained as 5.73 m 2 g -1 by BET method. The biochar particles obtained from Onopordom Heteracanthom were evaluated as an adsorbent to remove Cr(VI) from aqueous environments. The effect of some parameters such as initial concentration of Cr(VI), dosage of adsorbent, and pH were investigated on the adsorption capacity of Cr(VI) onto the adsorbent. The equilibrium data were analyzed by various isotherm models. The results revealed that in this process, the adsorption isotherm and kinetics have more conformity with Langmuir isotherm and pseudo-second-order kinetics, respectively. The multilinearity of the Weber and Morris adsorption kinetic model indicates that the intra-particle diffusion is not merely the rate-controlling step for the whole adsorption process.

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Section: Introductionmentioning

confidence: 99%

Chromium(VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom

Ghorbani-Khosrowshahi

Behnajady

2016

Int. J. Environ. Sci. Technol.

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“…In the contrary, JSP without pretreatment have smooth and hard surface indicating the presence of complex cellulose, hemicellulose and lignin framework (Reddy et al 1990). That is why various chemical and physical treatments have been applied to break down the complex structure of JSP to improve the adsorption performance of many lignocellulosic materials (Robinson et al 2002;Chun et al 2004). In this study, various physico-chemical and radiation method were applied to enhance the adsorption capacity of the JSP.…”

Section: Adsorption Capacity Of Differently Pretreated Jute Stick Powdermentioning

confidence: 99%

Gamma irradiation and steam pretreatment of jute stick powder for the enhancement of dye adsorption efficiency

et al. 2017

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The aim of this study is to find out the facile and effective pretreatment technique to enhance the capacity of jute stick powder (JSP) in adsorbing dye from raw textile effluent. Hence, different pretreatment techniques, i.e., radiation treatment, alkali treatment, ammonia treatment, steam treatment and CaCl 2 treatment were applied to JSP and the adsorbing performance were examined for synthetic dye solutions (Blue FCL and Red RL dye). Different gamma radiation doses were applied on JSP and optimum dye removal efficiency was found at 500 krad in removing these two dyes (50 ppm) from solutions. Among the different pretreatment techniques, gamma irradiated JSP (500 Krad) exhibits highest dye uptake capacity for RED RL dye, whereas steam-treated JSP shows highest performance in adsorbing blue FCL dye. Subsequently, we applied the gamma irradiated and steam-treated JSP on real textile effluent (RTE) and these two techniques shows potentiality in adsorbing dye from raw textile effluent and in reducing BOD 5 , COD load and TOC to some extent as well. Fourier transform infrared spectroscopy (FTIR) analysis also proved that dye has been adsorbed on pretreated JSP.

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“…Studies have shown that a variety of agricultural waste can remove toxic heavy metal ions effectively, such as rice bran [4], rice husk [5], bark [6], peanut shells [7], coconut shell [8], wheat straw [9], waste tea leaves [10], bagasse [11], water hyacinth [12], coffee beans [13], a variety of plants, sawdust [14], etc. [15,16].…”

Section: Introductionmentioning

confidence: 99%

Biosorption characteristics of uranium(VI) from aqueous solution by pummelo peel

Liu

Cao

et al. 2012

J Radioanal Nucl Chem

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The biomass pummelo peel was chosen as a biosorbent for removal of uranium(VI) from aqueous solution. The feasibility of adsorption of U(VI) by Pummelo peel was studied with batch adsorption experiments. The effects of contact time, biosorbent dosage and pH on adsorption capacity were investigated in detail. The pummelo peel exhibited the highest U(VI) sorption capacity 270.71 mg/g at an initial pH of 5.5, concentration of 50 lg/ mL, temperature 303 K and contacting time 7 h. The adsorption process of U(VI) was found to follow the pseudo-second-order kinetic equation. The adsorption isotherm study indicated that it followed both the Langmuir adsorption isotherm and the Freundlich adsorption isotherm. The thermodynamic parameters values calculated clearly indicated that the adsorption process was feasible, spontaneous and endothermic in nature. These properties show that the pummelo peel has potential application in the removal of the uranium(VI) from the radioactive waste water.

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Adsorptive removal of Cr(VI) by Fe-modified steam exploded wheat straw

Cited by 93 publications

References 5 publications

Chromium(VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom

Chromium(VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom

Gamma irradiation and steam pretreatment of jute stick powder for the enhancement of dye adsorption efficiency

Biosorption characteristics of uranium(VI) from aqueous solution by pummelo peel

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