Open AccessREMOVAL OF HEAVY METALS USING BACTERIAL BIO-FLOCCULANTS OF BACILLUS SP. AND PSEUDOMONAS SP.
Author(s) -
Ahmed M. Azzam,
Ahmed Tawfik
Publication year - 2015
Publication title -
journal of environmental engineering and landscape management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.514
H-Index - 28
eISSN - 1822-4199
pISSN - 1648-6897
DOI - 10.3846/16486897.2015.1068781
Subject(s) - flocculation , pseudomonas , effluent , chemistry , wastewater , heavy metals , industrial wastewater treatment , sewage treatment , bacillus (shape) , pulp and paper industry , nuclear chemistry , environmental chemistry , microbiology and biotechnology , bacteria , environmental engineering , biology , environmental science , organic chemistry , genetics , engineering
Bio-flocculants produced by Bacillus sp. and Pseudomonas sp. were evaluated as flocculating agents for the removal of Cu (II), Pb (II) and Cd (II) from chemical and textile wastewater industries. Both bio-flocculants were very effective for removal of heavy metals at a dosage not exceeding 0.1 mg/ml. However, the removal efficiency of heavy metals was dependant on initial concentration and type of bio-flocculants. 84.0% of Cu2+ and 99.5% of Pb2+ were removed from industrial wastewater using Bacillus sp. Bio-flocculant resulting residual values of 28.5 and 1.13μg/l respectively in the treated effluent. Lower removal efficiencies of 70.4% for Cu2+ and 97.8% for Pb2+ occurred using Pseudomonas sp. bioflocculant. Nevertheless, Pseudomonas sp. bio-flocculant achieved a substantially higher removal efficiency of Cd2+ (93.5%) as compared to 72.9% using Bacillus sp. Based on these results bio-flocculants are considered as a viable alternative for the treatment of industrial wastewater containing heavy metals.