TY - JOUR
T1 - Partial removal and detoxification of malachite green and crystal violet from laboratory artificially contaminated water by Pleurotus ostreatus
AU - Morales-álvarez, Edwin D.
AU - Rivera-Hoyos, Claudia M.
AU - González-Ogliastri, Natalia
AU - Rodríguez-Vázquez, Refugio
AU - Poutou-Piñales, Raúl A.
AU - Daza, Carlos E.
AU - Pedroza-Rodríguez, Aura M.
PY - 2016
Y1 - 2016
N2 - The triphenylmethane Malachite Green (MG) and Crystal Violet (CV) dyes are cationic dyes and mix with domestic wastewater when dumped; increasing, among others, the chemical and biological oxygen demand and can cause acute toxicity at different trophic levels. Promoting the removal (decolorization) of MG and CV, and laccase activity (54.8 ± 8.9 and 30.6 ± 2.9 UL-1 respectively) by using P. ostreatus viable biomass needed parameters such as pH (4.5 and 6.0), temperature (25 to 30 °C), stirring speed (120 rpm), percentage of inoculum (2% v/v), and dye concentration (20 and 10 mg L-1). In adsorption studies, it was showed that an acidic pH favors the adsorption of both dyes and the model of pseudo-second order describes best the phenomenon of adsorption. Finally, the germination index (GI), using Lactuca sativa seeds for the initial dyes solutions, was < 50%; demonstrating its high phytotoxic effect. When dye solutions were treated with viable biomass, the GI increased, leaving open the possibility to perform future research to determine if the aqueous solutions, post-treated with P. ostreatus, could be used in treatments that generate less toxic water which could be used in processes that do not require potable water.
AB - The triphenylmethane Malachite Green (MG) and Crystal Violet (CV) dyes are cationic dyes and mix with domestic wastewater when dumped; increasing, among others, the chemical and biological oxygen demand and can cause acute toxicity at different trophic levels. Promoting the removal (decolorization) of MG and CV, and laccase activity (54.8 ± 8.9 and 30.6 ± 2.9 UL-1 respectively) by using P. ostreatus viable biomass needed parameters such as pH (4.5 and 6.0), temperature (25 to 30 °C), stirring speed (120 rpm), percentage of inoculum (2% v/v), and dye concentration (20 and 10 mg L-1). In adsorption studies, it was showed that an acidic pH favors the adsorption of both dyes and the model of pseudo-second order describes best the phenomenon of adsorption. Finally, the germination index (GI), using Lactuca sativa seeds for the initial dyes solutions, was < 50%; demonstrating its high phytotoxic effect. When dye solutions were treated with viable biomass, the GI increased, leaving open the possibility to perform future research to determine if the aqueous solutions, post-treated with P. ostreatus, could be used in treatments that generate less toxic water which could be used in processes that do not require potable water.
KW - Crystal Violet
KW - Decolorization and adsorption
KW - Malachite Green
KW - Pleurotus ostreatus
UR - http://www.scopus.com/inward/record.url?scp=85011857438&partnerID=8YFLogxK
U2 - 10.11144/Javeriana.SC21-3.prad
DO - 10.11144/Javeriana.SC21-3.prad
M3 - Article
AN - SCOPUS:85011857438
SN - 0122-7483
VL - 21
SP - 259
EP - 285
JO - Universitas Scientiarum
JF - Universitas Scientiarum
IS - 3
ER -