Study on identification of leather industry wastewater constituents and its photocatalytic treatment

Natarajan, Thillai Sivakumar; Natarajan, Kalithasan; Bajaj, Hari C.; Tayade, Rajesh J.

doi:10.1007/s13762-013-0200-9

Cited by 56 publications

(24 citation statements)

References 35 publications

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“…Besides, all dyes give highly coloured appearance to water sources, causing a variation in their natural aesthetic perception, blocking sunlight transmission and decreasing photosynthesis [8,9]. Since textile dyes have high-molar absorption coefficients, even a very small amount of dye in water (<1 mg l −1 ) is highly visible, affecting the transparency of water bodies [10].…”

Section: Introductionmentioning

confidence: 99%

Catalytic degradation of real-textile azo-dyes in aqueous solutions by using Cu–Co/halloysite

et al. 2019

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Catalytic degradation of textile dyes in diluted aqueous solutions with minimal consumption of energy is a great challenge for wastewater treatment and environmental protection. Efficient heterogeneous catalysts are needed to completely oxidize azo-dyes under soft conditions. In this work, catalysts of Cu-Co oxide (1:2 molar ratio) supported on halloysite (Ha) nanotubes (CuCo(5%)/Ha and CuCo(10%)/Ha) were synthesized and used in the catalytic wet peroxide oxidation of reactive yellow 145 (RY-145) and basic red 46 (BR-46). The catalysts were characterized by chemical analysis, X-ray diffraction, Raman spectroscopy, N 2 adsorption isotherms, scanning electron microscopy and transmission electron microscopy. The results showed that the synthesized catalysts possess nanotubular structure with good mesoporosity, and the spinel structure CuCo 2 O 4 was identified as the active phase deposited on Ha. The catalysts degraded these azo-dyes in diluted solutions (22 mg l −1 of RY-145 and 35 mg l −1 of BR-46) under mild reaction conditions (25 • C, atmospheric pressure, pH 4 and minimum amounts of both catalyst and H 2 O 2). Significant levels of dye conversion (93.1 ± 2.2% for RY-145 and 54.4 ± 2.0% for BR-46) were achieved in a relatively short time. In addition, significant values of total organic carbon removal (59.5 ± 1.8% for RY-145 and 33.9 ± 1.4% for BR-46) were obtained, indicating the total oxidation of a significant fraction of these dyes to CO 2 and H 2 O.

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Section: Introductionmentioning

confidence: 99%

Catalytic degradation of real-textile azo-dyes in aqueous solutions by using Cu–Co/halloysite

et al. 2019

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“…Water is used in daily activities, which in turn increases the need for efficient wastewater treatment facilities. Due to rapid industrialization, a large quantity of polluted water is generated every year by different industries such as textile (Zheng et al 2012), leather (Natarajan et al 2013), pharmaceutical (Farhadi et al 2012;Boroski et al 2009), heavy metal (Al Aji et al 2012), cadmium removal (Bayar et al 2013;Yilmaz et al 2012), arsenic (Can et al 2012(Can et al , 2014, dairy processing (Idris et al 2012), paint (Singh et al 2015), petroleum (Zhou et al 2012), pulp and paper (Bengtsson et al 2008;Pokhrel and Viraraghavan 2004), distillery (Lucas et al 2009), fertilizer (Srivastava et al 1996), tannery (Houshyar et al 2012), landfill (Wu et al 2011), bakers yeast (Gengec et al 2012), food processing (Pocostales et al 2012), biodiesel (Ngamlerdpokin et al 2011) and olive packaging industries (García-García et al 2011;Kul et al 2015), Pistachio processing industry Fil et al 2014), etc. The pulp and paper industry is a large consumer of fresh water and an important source of wastewater (Ashrafi et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Sono assisted electrocoagulation process for the removal of pollutant from pulp and paper industry effluent

Asaithambi

Aziz

Sajjadi

et al. 2016

Environ Sci Pollut Res

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In the present work, the efficiency of the sonication, electrocoagulation, and sono-electrocoagulation process for removal of pollutants from the industrial effluent of the pulp and paper industry was compared. The experimental results showed that the sono-electrocoagulation process yielded higher pollutant removal percentage compared to the sonication and electrocoagulation process alone. The effect of the operating parameters in the sono-electrocoagulation process such as electrolyte concentration (1-5 g/L), current density (1-5 A/dm), effluent pH (3-11), COD concentration (1500-6000 mg/L), inter-electrode distance (1-3 cm), and electrode combination (Fe and Al) on the color removal, COD removal, and power consumption were studied. The maximum color and COD removal percentages of 100 and 95 %, respectively, were obtained at the current density of 4 A/dm, electrolyte concentration of 4 g/L, effluent pH of 7, COD concentration of 3000 mg/L, electrode combination of Fe/Fe, inter-electrode distance of 1 cm, and reaction time of 4 h, respectively. The color and COD removal percentages were analyzed by using an UV/Vis spectrophotometer and closed reflux method. The results showed that the sono-electrocoagulation process could be used as an efficient and environmental friendly technique for complete pollutant removal.

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“…The role of spent batteries in this environmental remediation is becoming a prominent one. Natarajan and Bajaj [142] investigated the adsorption behavior of organic dyes onto the recovered materials of spent LIBs. In addition, they proved that the modified recovered graphite with Mg(OH) 2 had the maximum adsorption ability of ≈600 mg g −1 phosphate as a cost-effective adsorbent in waste water (Figure 13).…”

Section: Application In Adsorption and Photocatalysismentioning

confidence: 99%

Burgeoning Prospects of Spent Lithium‐Ion Batteries in Multifarious Applications

Natarajan

Aravindan

2018

Advanced Energy Materials

218

126

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Where sustainability is concerned, recycling of reutilizable wastes will always occupy the apex of the green chemistry research. Handling electronic wastes in a green manner without affecting the ecology and human health is one of the main challenges for material chemists and gains top priority among other fields of research. At present, handling and recycling of spent lithium‐ion batteries (LIBs) is a key priority. Due to these environmental concerns, massive interest has been triggered in various crystal structures of metal oxides, and different kinds of carbon materials that provide the opportunities to replace the commercial LIBs for energy storage and conversion applications in a cost‐effective manner. Reports are available on the recycling of spent LIBs, but these reports mainly focus on the metal recovery process rather than finding suitable applications for the recovered material. This present work exclusively summarizes the global demand for LIB raw materials, tactics in the resynthesis process along with the wide range of growing applications of spent LIB materials. Finally, the future prospects of applications that utilize spent LIB materials are addressed.

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Study on identification of leather industry wastewater constituents and its photocatalytic treatment

Cited by 56 publications

References 35 publications

Catalytic degradation of real-textile azo-dyes in aqueous solutions by using Cu–Co/halloysite

Catalytic degradation of real-textile azo-dyes in aqueous solutions by using Cu–Co/halloysite

Sono assisted electrocoagulation process for the removal of pollutant from pulp and paper industry effluent

Burgeoning Prospects of Spent Lithium‐Ion Batteries in Multifarious Applications

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