Optimization of the electrocoagulation process for the removal of copper, lead and cadmium in natural waters and simulated wastewater

Escobar, Claudio; Soto-Salazar, Cesar; Toral, M. Inés

doi:10.1016/j.jenvman.2005.11.012

Cited by 153 publications

(66 citation statements)

References 10 publications

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“…Sustainability of existing water bodies to provide sufficient water has become an issue of concern. As a result, more water sources are being investigated and identified as potential alternatives to supplement limited fresh water resources especially in arid areas [6,7]. Industrial and other wastewater sources could be potential supplement for fresh water resources when they are properly treated.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the effect of two support materials on copper removal from aqueous solution in the activated sludge process

Kutty

Ezechi

Khaw

et al. 2015

WIT Transactions on Ecology and the Environment

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Two support materials, microwave incinerated rice husk ash (MIRHA) and groundwater treatment plant sludge (GWTPS), were used as support materials for biomass in the removal of copper from aqueous solution during a continuous flow study. A third reactor containing biomass alone without the addition of support material (RB) was used as a control to monitor the performance of the support materials. All reactors were given 15 days for the acclimatization of biomass. The reactors containing MIRHA and GWTPS were given an additional 10 days for acclimation after the addition of the support materials on day 15. All reactors were identically designed with a size of 8.5 L and operated at a flowrate of 7 L/d and SRT of 30 days across 8 different phases. Different concentrations of Cu(II) ranging from 0.5 mg/L to 15 mg/L were applied to the reactors at different phases. Results obtained from each phase of the experiments showed that GWTPS and MIRHA improved copper toxicity resistance in their respective reactors. For the control reactor (RB), copper toxicity was significant and violated the DOE Malaysia copper effluent standard at phase 5 (influent concentration 2 mg/L) whereas MIRHA and GWTPS reactors violated the DOE Malaysia copper effluent standard at phase 7 (influent concentration 10 mg/L) respectively. However, GWTPS containing reactor showed slightly better support for toxicity resistance than reactor MIRHA. The toxicity of copper on the three reactors was observed in the reduction of mixed liquor volatile suspended solids (MLVSS) within each reactor. For the control, MLVSS rapidly decreased from phase 3 to phase 8 whereas MIRHA and GWTPS reactors increased from phase 3 to phase 6 and decreased from phase 7 to phase 8. These results have shown that MIRHA and GWTPS have the potential of improving biomass resistance to toxicity of heavy metals.

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Section: Introductionmentioning

confidence: 99%

Comparison of the effect of two support materials on copper removal from aqueous solution in the activated sludge process

Kutty

Ezechi

Khaw

et al. 2015

WIT Transactions on Ecology and the Environment

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“…The entire effectiveness of the coagulation process depends on the appropriate amount of coagulant. Escobara et al (2006) have also observed logistical relationship between electrode geometric area (AG) and copper removal efficiency; and accomplished that an increase in copper removal was related to an increase in AG, reaching an optimal value of 35 cm 2 , with an asymptotic value of near 80 %. Chopra and Sharma (2013) observed that with a fourfold increase in the electrode area of Al-Fe i.e.…”

Section: Effect Of Electrode Area (Ea)mentioning

confidence: 88%

Efficiency of aluminum and iron electrodes in removal of colour, turbidity and total suspended solid from biologically treated municipal wastewater

Sharma

Chopra

2015

JANS

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The present investigation was undertaken to observe the effect of different combinations of almunium and iron (Al-Al, Al-Fe, Fe-Fe and Fe-Al) electrodes on the removal of colour, turbidity (TD) and total suspended solids (TSS) of biologically treated municipal wastewater ( BTMW) using applied potential (V), operating time (OT) and initial pH. The maximum removal of colour (98.7 %) and TSS (96.89 %) was found with the use of Al-Al combination with optimum operating conditions (Voltage: 40 V; OT: 40 mins.; IED: 1.0 cm; EA: 160 cm 2 ; initial pH: 7.5 and ST: 30 mins). It was interesting to note that TD of BTMW was completely removed at these optimal operating conditions. The economic evaluation of electrode combinations was observed to be in the order of Fe-Al

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“…De los distintos efluentes industriales, el impacto ambiental de los que contienen metales pesados es cada vez mayor [6]. Los metales pesados más importantes encontrados a menudo en efluentes y suelos contaminados incluyen al plomo, cromo, cobre, zinc, arsénico, níquel y cadmio.…”

Section: 2unclassified

“…Son varios los métodos que se pueden utilizar para eliminar el cromo de las aguas residuales. Éstos incluyen la precipitación química, la degradación biológica, la adsorción, el intercambio iónico, la biosorción, la separación por membranas y los métodos electroquímicos [6,[56][57][58][59][60][61][62][63].…”

Section: "Tratamiento De Disoluciones Que Contienen Cromo Hexavalenteunclassified

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Tratamiento de disoluciones que contienen cromo hexavalente mediante electrocoagulación con ánodos de hierro

Núñez¹,

Guadalupe²

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Son muchas las personas que de una u otra manera han contribuido a la realización de esta tesis, y a todas ellas quiero expresarles mi agradecimiento.En el plano académico, quiero agradecer al Departamento de Ingeniería Química y Nuclear, por haberme brindado la oportunidad de completar mi formación, realizando la tesis doctoral en este grupo de investigación.A mis directores de tesis, Valentín y Tere por su ayuda, ideas, consejos, comentarios, paciencia y por depositar su confianza en mí, pero sobre todo por su excepcional calidad humana.A mis compañeros del departamento de Ingeniería Química y Nuclear, por su apoyo y ayuda durante esta investigación, que con el tiempo se han convertido en amigos, gracias a todos, en especial a Virginia, Isaac y Carlos que se han convertido en parte de mi familia y han compartido conmigo los buenos y malos momentos en estos años.A mis amigos de siempre, y a los que he ido encontrando en el camino, Dulce, Edith, Itzma, Xitlali, Faby y todos los que me han hecho olvidar por un momento todas mis preocupaciones para disfrutar de su compañía y su cariño, a todos ellos, muchísimas gracias.Agradezco muy especialmente a mi familia, a mis padres Humberto y Loli, por confiar en mi, por todo el amor que me dan y por darme alas para volar, sin ustedes esto no hubiera sido posible, a mi hermana Ani por apoyarme en todo momento y estar allí para mi siempre, a mis hermanos Beto y Alex por su apoyo y consejos, a mis abuelitas Dalia y Mary por ser mujeres excepcionales y un gran ejemplo para mi, a todos gracias por estar conmigo en todo momento y por enseñarme que merece la pena esforzarse para conseguir lo que se desea.A mi esposo Germán que me ha acompañado a lo largo de este proceso, gracias por escucharme, por no permitir que desespere, por tu apoyo, tu amor incondicional y simplemente por ser parte de mi vida.

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Optimization of the electrocoagulation process for the removal of copper, lead and cadmium in natural waters and simulated wastewater

Cited by 153 publications

References 10 publications

Comparison of the effect of two support materials on copper removal from aqueous solution in the activated sludge process

Comparison of the effect of two support materials on copper removal from aqueous solution in the activated sludge process

Efficiency of aluminum and iron electrodes in removal of colour, turbidity and total suspended solid from biologically treated municipal wastewater

Tratamiento de disoluciones que contienen cromo hexavalente mediante electrocoagulación con ánodos de hierro

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