A review on chemical coagulation/flocculation technologies for removal of colour from textile wastewaters

Verma, Akshaya Kumar; Dash, Rajesh Roshan; Bhunia, Puspendu

doi:10.1016/j.jenvman.2011.09.012

Cited by 1,621 publications

(686 citation statements)

References 119 publications

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“…2012). The point of zero charge (pH PZC ) was determined by means of the solid addition method (Verma et al 2012). The surface area and pore volume of SMS were calculated based on the nitrogen adsorption isotherm at 77 K, using measurements performed on an ASAP 2010 analyzer (Micromeritics, USA).…”

Section: Preparation and Characterization Of Adsorbentmentioning

confidence: 99%

Adsorptive Removal of Methylene Blue from Aqueous Solution by Spent Mushroom Substrate: Equilibrium, Kinetics, and Thermodynamics

Yan¹,

Lijuan²

2013

BioResources

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Spent mushroom substrate (SMS), a renewable bio-waste from the mushroom-growing industry, was used as an adsorbent to remove methylene blue (MB) from aqueous solution. SMS was characterized using scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). Adsorption experiments with the SMS adsorbent were performed based on various parameters, such as adsorbent dose, initial MB dye concentration, initial pH, contact time, and temperature. The Langmuir, Freundlich, and Temkin isotherm models were employed to interpret the adsorption behavior. The results indicated that the equilibrium data were perfectly represented by the Temkin isotherm. The maximum adsorption capacity of SMS reached 63.5 mg g -1 at 303 K. The kinetics studies indicated that the pseudo-second-order model best described the adsorption of MB on SMS. The activation energy of the adsorption was 5.64 kJ mol -1 . Thermodynamic parameters suggested that the adsorption was an exothermic and spontaneous physical process. The results imply that SMS is a potentially low-cost adsorbent for treating wastewater containing cationic dyes.

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Section: Preparation and Characterization Of Adsorbentmentioning

confidence: 99%

Adsorptive Removal of Methylene Blue from Aqueous Solution by Spent Mushroom Substrate: Equilibrium, Kinetics, and Thermodynamics

Yan¹,

Lijuan²

2013

BioResources

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“…Results indicate that both the pH and PFS concentration influenced the removal, with the highest removal being obtained at an optimum pH of »4 with 300 mg/L PFS. At pH 4, the COD removal increases from 0% to 80% with increasing PFS concentrations from 0 to 200 mg/L; when 200-900 mg/L PFS was dosed, COD removal only increased 10% (Xing and Sun, 2009 , which leads to higher removal performance of organic compounds (Zouboulis et al, 2008;Verma et al, 2012), as compared to conventional flocculation and coagulation like FeSO 4 and FeCl 3 .…”

Section: Flocculation and Coagulationmentioning

confidence: 95%

Pharmaceutical removal from water with iron- or manganese-based technologies: A review

Liu

Sutton

Rijnaarts

et al. 2016

Critical Reviews in Environmental Science and Technology

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Pharmaceuticals are detected at trace levels in waters. Their adverse effects on aquatic ecosystems and human health demand novel pharmaceutical removal technologies for treating wastewater effluents. Iron (Fe) or manganese (Mn) may play important roles in these new technologies since these metals are abundantly available at low costs and are known to contribute to organic conversions via physico-chemical, chemical, and biologically related processes. Few reviews describe and discuss Fe-or Mn-based technologies for the purpose to remove pharmaceuticals from water. Therefore, we review the current literature sorted into the three removal mechanisms, that is., through physico-chemical, chemical, and biological processes. The principals, performance, and influential parameters of these three types of technologies are described. Current and potential applications of these technologies are critically evaluated in order to identify advantages and challenges. In addition, the Fe-or Mn-based technologies which are currently not used but promising to further develop to remove pharmaceuticals cost efficiently are proposed.

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“…The receiving water bodies and drains carry precarious industrial effluents which affect the quality of water and aquatic ecosystem and human life Mishra et al 2016;Kumar et al 2013Kumar et al , 2014aKumar et al , b, 2015a. The textile industry in India is one of the most important and most polluting industries in terms of consumption and generation of huge amounts of wastewater, fuel and diverse group of chemicals such as dyes (Asia et al 2006;dos Santos et al 2007;Verma et al 2012). It is reported that more than 8000 synthetic chemical products are associated with different processing steps of dye (Bhatia et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Physicochemical assessment of industrial textile effluents of Punjab (India)

et al. 2018

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Urbanization and industrialization are generating huge quantities of untreated wastewater leading to increased water pollution and human diseases in India. The textile industry is one of the leading polluters of surface water and consumes about 200-270 tons of water to produce 1 ton of textile product. The primary objective of the present study was to investigate the pollution potential of textile industry effluent draining into Buddha Nallah stream located in Ludhiana, Punjab (India), and determine the seasonal variation in physicochemical parameters (pH, water temperature, total dissolved solids, total suspended solids, biochemical oxygen demand (BOD) and chemical oxygen demand (COD) of Buddha Nallah water. During summer months, for Site 1 and Site 2, the value of pH was in the alkaline range of 8.78 ± 0.47 and 8.51 ± 0.41, respectively. The values of pH in the rainy season were found to be in the range of 7.38 ± 0.58 and 7.11 ± 0.59 for Site 1 and Site 2, respectively. In the autumn and winter seasons, the average pH values were found to be in the range of 8.58 ± 1.40 and 8.33 ± 0.970, respectively. The maximum mean temperature in summer was recorded as 41.16 ± 4.99 °C, and lowest mean temperature in winter was recorded as 39.25 ± 2.25 °C at Site 2. The suspended solids were found to be highest (143.5 ± 75.01 and 139.66 ± 71.87 mg/L) in autumn for both the sites and lowest (86.50 + 15.10 mg/L) in the rainy season for Site 1. The values of BOD and COD of the textile effluent of both sites during all the seasons ranged from 121-580 to 240-990 mg/L, respectively, much higher than WHO water quality standard of 30 mg/L for BOD and 250 mg/L for COD. The present study deals with the collection of textile industry effluent and its characterization to find out the physicochemical load being drained by the effluent generated from textile industries, on the natural wastewater streams.

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A review on chemical coagulation/flocculation technologies for removal of colour from textile wastewaters

Cited by 1,621 publications

References 119 publications

Adsorptive Removal of Methylene Blue from Aqueous Solution by Spent Mushroom Substrate: Equilibrium, Kinetics, and Thermodynamics

Adsorptive Removal of Methylene Blue from Aqueous Solution by Spent Mushroom Substrate: Equilibrium, Kinetics, and Thermodynamics

Pharmaceutical removal from water with iron- or manganese-based technologies: A review

Physicochemical assessment of industrial textile effluents of Punjab (India)

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