Low-cost hemp biomaterials for nickel ions removal from aqueous solutions

Kyzas, George Z.; Terzopoulou, Zoi; Nikolaidis, Vasileios; Alexopoulou, E.; Bikiaris, Dimitrios N.

doi:10.1016/j.molliq.2015.05.060

Cited by 58 publications

(52 citation statements)

References 64 publications

(72 reference statements)

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“…This may be attributed to overlapping of adsorption sites resulting in a decrease in total adsorbent surface area available to metals and an increase in diffusion path length. Similar conclusions were proposed by Kyzas et al …”

Section: Resultssupporting

confidence: 92%

“…Using the experimental data described in Figure , kinetic plots were obtained according the Ho and McKay equation (data not shown) and good fits were observed (correlation coefficients approaching unity). These results, obtained for metal mixtures, are in good agreement with those reported in the literature indicating that the kinetics of adsorption onto hemp fibers of single metals or binary/ternary systems was also second‐order …”

Section: Resultssupporting

confidence: 91%

“…Hemp can also be processed into different forms of felt, with various densities, used for example in automotive and construction applications or as reinforcement in composite materials. In recent years, hemp‐based adsorbents have been proposed for metal ion removal from aqueous solutions . These studies demonstrated that hemp could be a viable adsorbent for environmental purposes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Simultaneous removal of Cd, Co, Cu, Mn, Ni and Zn from synthetic solutions on a hemp‐based felt: Experimental design

Loiacono

Morin‐Crini

Cosentino

et al. 2016

J of Applied Polymer Sci

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International audienceThe potential of using a hemp-based material in felt form as an adsorbent for removing the metals from aqueous mixturesof Cd, Co, Cu, Mn, Ni, and Zn is investigated in the present study using batch experiments at an initial pH between 4.9 and5.2. The operating variables studied were initial metal concentration, adsorbent dosage, contact time, agitation speed, temperature,presence of NaCl, and pH. Experiments showed that this nonconventional adsorbent exhibited interesting capacities: 1 g of hemp wasable to remove 7.4 mg of metals at a concentration of 25 mg/L for each metal present in 100 mL of solution. Kinetic results showedthat the process was uniform and rapid: adsorption of metals reached equilibrium in 10 min. The adsorption capacities were almostindependent of temperature between 25 and 50 8C and pH between 4 and 6, but dependent on the presence of electrolytes such asNaCl. Interesting results were also obtained for real polymetallic effluents. All these findings are significant for the future developmentof hemp-based materials for use as bag filters for metal removal from industrial effluents

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Simultaneous removal of Cd, Co, Cu, Mn, Ni and Zn from synthetic solutions on a hemp‐based felt: Experimental design

Loiacono

Morin‐Crini

Cosentino

et al. 2016

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…In recent years, hemp‐based materials have been proposed for metal ion removal from aqueous synthetic solutions. Abundant data on this topic can be found in the literature . However, these published works focus on the removal of metals present in synthetic solutions using hemp in fiber form.…”

Section: Introductionmentioning

confidence: 99%

Metals in aqueous solutions and real effluents: biosorption behavior of a hemp‐based felt

Loiacono

Crini

Chanet³

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND In this study, a hemp‐based material in the form of a felt was used to adsorb metals in individual aqueous solutions and in polycontaminated effluents using the batch method. The factors affecting the biosorption process were initial metal concentration, biosorbent dosage, contact time and pH. RESULTS In controlled conditions, results showed that: (i) the felt exhibited high adsorption capacities towards metals in the following order: Pb > Cd > Cu > Zn > Co ∼ Fe ∼ Ni ∼ Cr ∼ Al ∼ Mn; (ii) no significant differences were observed for the three salts used (sulfate, chloride and nitrate); (iii) the process was rapid: 10 min were sufficient to attain equilibrium; (iv) the biosorption efficiency increased considerably with the increase of the biosorbent dosage; and (v) the adsorption capacities were independent of pH between 4 and 6. The maximum adsorption capacities for Cd, Cu, Zn, Co, Fe, Ni, Cr, Al and Mn were 27.47, 14.64, 10.59, 7.99, 7.85, 7.87, 6.53, 6.38 and 4.55 mg g–1, respectively. Interesting results also were obtained for real polymetallic effluents. Ecotoxicological tests also confirmed the efficiency of the biosorption to radically decrease the effluent toxicity. CONCLUSIONS Based on these results, hemp‐based felt could serve as a novel and efficient biosorbent material for pollutant removal from industrial effluents. © 2018 Society of Chemical Industry

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“…Fibres gained from the stalk (phloem) of these plants (bast fibres) contain, besides cellulose (64-78 %), various other materials such as hemicelluloses (5-22 %), pectin (0,8-2,5 %), lignin (2-5 %), water-soluble materials (0.7-1.5 %) and waxes (0.7-1.5 %) (Batra 2007). These fibres are used mostly for clothing (Gouveia et al 2010;Jinqiu and Jianchun 2010;Muzyczek 2012), insulation (Fages et al 2013;Latif et al 2014), agriculture , filtration (Anandjiwala and Boguslawsky 2008;Jianyong and Jianchun 2013), composites (Miao and Hamad 2013), adsorption of some contaminants (Kyzas et al 2015), and biofuel (Chandra et al 2015;Rehman et al 2013). Due to their relatively small carbon footprint, they have an increasing role in the market of biocomposites, mainly for the automotive sector and insulation materials (Barth and Carus 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of mild alkali/ultrasound treatment on flax and hemp fibres: the different responses of the two substrates

et al. 2016

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Flax and hemp fibres were treated by various combinations of water/diluted alkaline solution and stirring/ultrasound, respectively. Changes in the microstructure (scanning electron microscopy) and porous structure (low-temperature nitrogen adsorption), removal of non-cellulosic materials (weight loss, FTIR), mean fibre diameter, and adhesion of the polypropylene matrix to the fibres (micro-bond test) were investigated. For both types of fibres, removal of (FTIR) was observed. The fibre diameter of hemp was decreased by several treatments, most of all by stirring in alkali and subsequent sonication in water, while the ultrasound applied in alkali solution did not change the fibre fineness. This can be attributed to the dual effect of ultra-sonication: the swelling effect of alkali combined with ultrasound energy probably served the sticking of inter-fibrillar material rather than their dissolution. Fibre diameter of flax did not change in any circumstances. The porosity of hemp in the mesopore range increased, while that of flax decreased by alkali treatment and subsequent sonication. The reason for this difference might be the dissimilar cell wall structures of the two bast fibres, the high arabinose content of the hemp, and/or the cottonisation of hemp. No treatments altered the fibre-matrix adhesion measured by pulling out the fibre from a micro-droplet of polypropylene.

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Low-cost hemp biomaterials for nickel ions removal from aqueous solutions

Cited by 58 publications

References 64 publications

Simultaneous removal of Cd, Co, Cu, Mn, Ni and Zn from synthetic solutions on a hemp‐based felt: Experimental design

Simultaneous removal of Cd, Co, Cu, Mn, Ni and Zn from synthetic solutions on a hemp‐based felt: Experimental design

Metals in aqueous solutions and real effluents: biosorption behavior of a hemp‐based felt

Effect of mild alkali/ultrasound treatment on flax and hemp fibres: the different responses of the two substrates

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