Removal of phosphate from landscape water using an electrocoagulation process powered directly by photovoltaic solar modules

Zhang, Shunxi; Zhang, Jian; Wang, Wenqing; Li, Furong; Cheng, Xianzhong

doi:10.1016/j.solmat.2013.05.027

Cited by 74 publications

(22 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the linear regression equation fitted to the experimental data, the first-order removal rate constants for MG and RY were 0.0035 and 0.0034 min −1 , respectively. Similar results were found during the removal of phosphate from landscape water using an electrocoagulation process with aluminium electrodes powered directly by photovoltaic solar modules; the first model was adequately applied to the experimental data [29]. Based on these results, we confirmed that electrocoagulation has the ability to simultaneously remove cationic and anionic dyes from aqueous solutions.…”

Section: Operation Of the Continuous-mode Electrocoagulationsupporting

confidence: 78%

See 1 more Smart Citation

Electrocoagulation-Adsorption to Remove Anionic and Cationic Dyes from Aqueous Solution by PV-Energy

Castañeda-Díaz

Pavón-Silva

Gutiérrez-Segura

et al. 2017

Journal of Chemistry

View full text Add to dashboard Cite

The cationic dye malachite green (MG) and the anionic dye Remazol yellow (RY) were removed from aqueous solutions using electrocoagulation-adsorption processes. Batch and continuous electrocoagulation procedures were performed and compared. Carbonaceous materials obtained from industrial sewage sludge and commercial activated carbons were used to adsorb dyes from aqueous solutions in column systems with a 96-98% removal efficiency. The continuous electrocoagulation-adsorption system was more efficient for removing dyes than electrocoagulation alone. The thermodynamic parameters suggested the feasibility of the process and indicated that the adsorption was spontaneous and endothermic (Δ = 0.037 and −0.009 for MG and RY, resp.). The Δ value further indicated that the adsorption process was spontaneous (−6.31 and −10.48; = 303 K). The kinetic electrocoagulation results and fixed-bed adsorption results were adequately described using a first-order model and a Bohart-Adams model, respectively. The adsorption capacities of the batch and column studies differed for each dye, and both adsorbent materials showed a high affinity for the cationic dye. Thus, the results presented in this work indicate that a continuous electrocoagulation-adsorption system can effectively remove this type of pollutant from water. The morphology and elements present in the sludge and adsorbents before and after dye adsorption were characterized using SEM-EDS and FT-IR.

show abstract

Section: Operation Of the Continuous-mode Electrocoagulationsupporting

confidence: 78%

“…Furthermore, solar cells were used to supply power as a sustainable and low-cost option for treatment. Photovoltaic modules have a long life and low maintenance cost and can produce high direct currents when exposed to sunlight [29].…”

Section: Operation Of the Continuous-mode Electrocoagulationmentioning

confidence: 99%

Electrocoagulation-Adsorption to Remove Anionic and Cationic Dyes from Aqueous Solution by PV-Energy

Castañeda-Díaz

Pavón-Silva

Gutiérrez-Segura

et al. 2017

Journal of Chemistry

View full text Add to dashboard Cite

show abstract

“…Recent studies show increases in the ED results and a decrease in removal efficiency due to the fall in ohmic tension between the cathode and the anode (Anand et al, 2014;Attour et al, 2014;Merzouk et al, 2010;Zhang et al, 2013). However, in our study an inverse effect was observed, where an increase in 1 cm ED of 2 and 3 cm favored the removal of color, turbidity and TOC.…”

Section: Resultscontrasting

confidence: 57%

Swine manure digestate treatment using electrocoagulation

Kunz

Steffens

et al. 2016

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

Anaerobic biodigestion is an appropriate alternative for the treatment of swine wastewater due to its biogas generation properties and the possibility of its application as a source of energy for heating or electricity. However, digestate can still contain high levels of turbidity, organic carbon and nutrients and must be correctly managed as a biofertilizer, or treated to avoid any impact on the environment. Considering this, electrocoagulation (EC) shows promise as a technology because of its ease of handling and high efficiency in effluent remediation. This study aimed to evaluate the performance of EC in a batch system in the treatment of swine wastewater digestate. The wastewater used in the treatment was sampled from a 10 m 3 biodigestor effluent (digestate) located at Concórdia, Santa Catarina, Brazil. A batch-scale experiment was carried out to evaluate the following two variables: electrode distance (ED) and voltage applied (V). The removal efficiency levels (%) for the best operational condition (2 cm, 5 V) after 30 min were: 97 %, 98 %, 77 % and 10 % for color, turbidity, total organic carbon (TOC) and total nitrogen (TN), respectively. The EC batch system produced efficient results, underlining its promise as an alternative to be applied in the treatment of digestate.

show abstract

“…NaCl was chosen as the supporting electrolyte because it does not interfere in the electrochemical reactions. In this way, NaCl was applied to provide adequate electrical conductivity, thereby decreasing the electrical energy consumption (Zhang et al 2013). To evaluate the effect of NaCl, the electrical current and pH were held constant at 300 mA and 5, respectively, during 40-min reaction time.…”

Section: Effects Of Nacl and Initial Nitrate Concentrationmentioning

confidence: 99%

“…5, nitrate removal in the presence of sodium chloride is remarkably higher in comparison with the condition that no supporting electrolyte was employed. The presence of chloride ion reduces the passivation layer on anode electrodes, leading to increase in anodic dissolution of iron and aluminum (Zhang et al 2013). In addition, available metal coagulants in solution increase by increasing NaCl dosage that is referred to the reduction in oxide layer (Golder et al 2007).…”

Section: Effects Of Nacl and Initial Nitrate Concentrationmentioning

confidence: 99%

Simultaneous application of iron and aluminum anodes for nitrate removal: a comprehensive parametric study

Ghanbari

Moradi

Mohseni‐Bandpei

et al. 2014

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Exposure to high concentration of nitrate through drinking water poses a threat to human health and environment. Electrocoagulation (EC) is an alternative water treatment process that involves electrogeneration of coagulant agents. In the present study, EC was exerted for the nitrate removal in a batch reactor using aluminum and iron anodes simultaneously. The effects of the main parameters including electrical current, initial pH, NaCl dosage, initial nitrate concentration and presence of turbidity on NO 3 -removal were investigated. NO 2 -as a byproduct was monitored during electrolysis, and nitratenitrite index was calculated. The results indicated that optimum condition was pH of 5, 300 mA electrical current, 100 mg/L NaCl and electrolysis time of 40 min, under which removal efficiency was 81.5 %. Nitrite anion was generated during electrolysis of nitrate solution which increases nitrate-nitrite index at the first reaction time, and it was eliminated after 20-min electrolysis time. Reaction kinetic of nitrate removal in the absence and presence of turbidity was first-order and zero-order, respectively.

show abstract

Removal of phosphate from landscape water using an electrocoagulation process powered directly by photovoltaic solar modules

Cited by 74 publications

References 46 publications

Electrocoagulation-Adsorption to Remove Anionic and Cationic Dyes from Aqueous Solution by PV-Energy

Electrocoagulation-Adsorption to Remove Anionic and Cationic Dyes from Aqueous Solution by PV-Energy

Swine manure digestate treatment using electrocoagulation

Simultaneous application of iron and aluminum anodes for nitrate removal: a comprehensive parametric study

Contact Info

Product

Resources

About