Anionic reactive dye removal from aqueous solution using a new adsorbent—Sludge generated in removal of heavy metal by electrocoagulation

Golder, Animes Kumar; Samanta, Amar Nath; Ray, Subhabrata

doi:10.1016/j.cej.2006.06.003

Cited by 85 publications

(34 citation statements)

References 41 publications

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“…During wastewater treatment by EC technique, these metals are also removed and accumulated in EMHS. Cr was found to be 1197 mg/kg in sewage sludge [6], 537 mg/kg in textile sludge [7], 358 mg/kg in common effluent plant sludge [11] and 14.5% as Cr 3+ in EMHS [3]. The present study contained less Cr concentration compared to Golder et al [3].…”

Section: Resultscontrasting

confidence: 44%

“…Cr was found to be 1197 mg/kg in sewage sludge [6], 537 mg/kg in textile sludge [7], 358 mg/kg in common effluent plant sludge [11] and 14.5% as Cr 3+ in EMHS [3]. The present study contained less Cr concentration compared to Golder et al [3]. Nb, Cd and Ga content in EMHS ranged from 20-35, 11-18 and 0-33 mg/kg, respectively (Figure 3).…”

Section: Resultsmentioning

confidence: 99%

“…Electrocoagulated Metal Hydroxide Sludge (EMHS) is generated in situ within the reactor without direct addition of any chemicals during wastewater treatment by the electrocoagulation (EC) technique [3]. In EC, sacrificial anodes (aluminum or iron electrodes) corrode to release active coagulant precursors.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Heavy Metal in Electrocoagulated Metal Hydroxide Sludge (EMHS) from the Textile Industry by Energy Dispersive X-Ray Fluorescence (EDXRF)

Adyel

Rahman

Khan

et al. 2012

Metals

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Environmental pollution due to discharges of heavy metal containing sludge from textile industries is a common nuisance in Bangladesh, where no treatment of sludge is carried out before final disposals. Energy Dispersive X-ray Fluorescence (EDXRF) was employed in the present study to analyze the heavy metal content of Electrocoagulated Metal Hydroxide Sludge (EMHS) collected from a composite textile industry. Thirteen heavy metals, viz., Mn, Ti, Cu, Zn, Ni, Sr, V, Cr, Zr, Hg, Cd, Nb and Ga, were detected. Mn, Ni, Cu, Zn and Cd exceeded the permissible limit to apply the EMHS in agricultural land. Cr, Ni, Cu and Zn were compared to the values of the European legislation to evaluate the environmental risk and to classify the wastes as inert wastes or as wastes that have to be control landfilled. EMHS was categorized as class I and needs to be deposited in controlled landfills.

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Section: Resultscontrasting

confidence: 44%

Section: Resultsmentioning

confidence: 99%

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Analysis of Heavy Metal in Electrocoagulated Metal Hydroxide Sludge (EMHS) from the Textile Industry by Energy Dispersive X-Ray Fluorescence (EDXRF)

Adyel

Rahman

Khan

et al. 2012

Metals

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“…The adsorption capability for non-treated fly ash presented an adsorption capacity of 1.4 × 10 -5 mol/g, while treated fly ash was found to be 2.4 × 10 -5 mol/g. Wang et al [21][22][23][24] also investigated and found that porous unburned carbon in the fly ash can be responsible for the adsorption of dye, not the fly ash itself (Tables 1-3). …”

Section: Dye Removal/separation Techniquesmentioning

confidence: 99%

Dye Removal by Adsorption: A Review

Kandisa¹,

Kv²,

Shaik³

et al. 2016

J Bioremediat Biodegrad

168

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This review discusses the methods for the removal of dyes from the wastewater effluents. Wastewater effluents contain synthetic dyes which cause a potential hazard to the environment hence these dyes need to remove from the water bodies. The various dye removal techniques are classified into Chemical, Physical, and Biological methods. Physical methods includes adsorption, ion exchange, and filtration/coagulation methods etc. while chemical methods includes ozonisation, Fenton reagent, photo catalytic reactions and biological methods include aerobic degradation, anaerobic degradation, biosorption etc. Adsorption found to be very effective and cheap method among the all available dye removal methods. Dyes from the industrial waste water effluents are effectively separated by using adsorbent such as activated carbon however its cost restricts the use in large scale applications. Experimental studies proved that the effective removal of dyes is obtained using several cheaply available non-conventional adsorbents also. Therefore, studies related to searching for efficient and low cost adsorbents derived from existing resources are gaining importance for the removal of dyes.

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“…EC sludge generated is very complex in nature having organic and inorganic matter; oil and grease; toxic heavy and trace metals (Rahman et al 2012). It also contains hydroxide of metals used as sacrificial anode dissociated during wastewater treatment (Golder et al 2006). These metal hydroxides are hazardous in nature and cannot be discharged as such to water bodies.…”

Section: Introductionmentioning

confidence: 99%

Utilization of electrocoagulation-treated spent wash sludge in making building blocks

Sharma

Joshi

2015

Int. J. Environ. Sci. Technol.

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Minimization, utilization and disposal of industrial waste are very important from the environmental esthetic point of view. Sludge generated during the treatment of distillery spent wash by electrocoagulation process is highly complex in nature and requires proper disposal. In this context, the present study was conducted to employ the electrocoagulation-generated sludge as a partial replacement of cement while manufacturing the non-constructional building blocks. Various physiochemical and thermo-gravimetric characterization studies have been carried out on electrocoagulation-generated sludge and cement. Mortar specimens with different proportions of sludge ranging from 0 to 15 % by weight of cement were tested for density, compressive strength and leachability of heavy metals by standard method. Results from the analysis showed that the cement-based solidification of EC sludge reduces the heavy metal concentration in the leachate from cement-sludge mortars compared to the EC sludge alone. Reduction in the compressive strength of mortar with 7.5 % substitution of cement by EC sludge was \5 % against the control mortar (without sludge), thereafter the reduction was substantial. The optimum percentage of sludge that can replace the cement with marginal change in the physiochemical properties is found to be 7.5. This can be used in the manufacturing of the non-constructional building material within the industry for their different types of usages such as paving, pot making and fencing of garden without affecting the environment.

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Anionic reactive dye removal from aqueous solution using a new adsorbent—Sludge generated in removal of heavy metal by electrocoagulation

Cited by 85 publications

References 41 publications

Analysis of Heavy Metal in Electrocoagulated Metal Hydroxide Sludge (EMHS) from the Textile Industry by Energy Dispersive X-Ray Fluorescence (EDXRF)

Analysis of Heavy Metal in Electrocoagulated Metal Hydroxide Sludge (EMHS) from the Textile Industry by Energy Dispersive X-Ray Fluorescence (EDXRF)

Dye Removal by Adsorption: A Review

Utilization of electrocoagulation-treated spent wash sludge in making building blocks

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