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Metals in aqueous solutions and real effluents: biosorption behavior of a hemp‐based felt
Author(s) -
Loiacono Sonia,
Crini Grégorio,
Chanet Gilles,
Raschetti Marina,
Placet Vincent,
MorinCrini Nadia
Publication year - 2018
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.5612
Subject(s) - biosorption , effluent , adsorption , aqueous solution , chemistry , nuclear chemistry , nitrate , chloride , sulfate , metal , environmental chemistry , environmental engineering , pulp and paper industry , environmental science , organic chemistry , sorption , engineering
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