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https://www.readbyqxmd.com/read/30119003/a-comparison-between-digital-camera-and-spectrophotometer-for-sensitive-and-selective-kinetic-determination-of-brilliant-green-in-wastewaters
#1
Saeed Damirchi, Ahmadi-Kalateh Khooni Maliheh, Tahereh Heidari, Zarrin Es'haghi, Mahmoud Chamsaz
In this study, a simple and novel kinetic spectrophotometric method has been proposed for the sensitive and highly selective determination of Brilliant Green. The method is based on the interaction of Brilliant Green with Triton X-100 in micellar media at room temperature. As a result of this interaction, the peak wavelength (625 nm) is gradually shifted toward longer wavelength region (634 nm) and more intensive hyper chromic effect has been seen. As well as, variations in the red, blue and green (RGB) components of the images as a function of time were observed...
August 7, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/30118599/conventional-ultrafiltration-as-effective-strategy-for-dye-salt-fractionation-in-textile-wastewater-treatment
#2
Mei Jiang, Kunfeng Ye, Jiajie Deng, Jiuyang Lin, Wenyuan Ye, Shuaifei Zhao, Bart Van der Bruggen
Use of tight ultrafiltration (UF) membranes has created a new pathway in fractionation of dye/salt mixtures from textile wastewater for sustainable resource recovery. Unexpectedly, a consistently high rejection for the dyes with smaller sizes related to the pore sizes of tight UF membranes is yielded. The potential mechanism involved in this puzzle remains unclear. In this study, seven tailored UF membranes with molecular weight cut-offs (MWCOs) from 6050 to 17530 Da were applied to separate dye/salt mixtures...
August 17, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/30114585/lessons-learnt-from-a-pilot-study-on-residual-dye-removal-by-an-aerated-treatment-wetland
#3
F Masi, A Rizzo, R Bresciani, N Martinuzzi, S D Wallace, D Van Oirschot, F Macor, T Rossini, R Fornaroli, V Mezzanotte
Treatment wetlands (TWs) have shown good capacity in dye removal from textile wastewater. However, the high hydraulic retention times (HRTs) required by these solutions and the connected high area requirements, remain a big drawback towards the application of TWs for dye treatment at full scale. Aerated TWs are interesting intensified solutions that attempt to reduce the TW required area. Therefore, an aerated CW pilot plant, composed of a 20 m2 horizontal subsurface flow TW (HF) and a 21 m2 Free Water System (FWS), equipped with aeration pipelines, was built and monitored to investigate the potential reduction of required area for dye removal from the effluent wastewater of a centralized wastewater treatment plant (WWTP)...
August 10, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/30105935/removal-of-acid-blue-62-textile-dye-from-aqueous-solutions-by-cerium-reagents
#4
Elham Keshmirizadeh, Hamid Modarress, Fatemeh Jahedi
The removal of Acid Blue62 (AB62) dye which is known as a pollutant agent and contains in wastewater of textile industry has been studied in this work by using five various cerium compounds as the oxidizing agents. The parameters involved in the oxidation reaction such as pH, initial dye concentration and the oxidizing agent dosage have been investigated using both batch and semi-batch reactors at ambient temperature. The results indicated that the rate of oxidation for various cerium reagents are in the following order CeF4 > (NH4 )2 Ce (NO3 )6 > Ce (SO4 )2 > CeCl3 > Ce (CH3 COO)3 where cerium fluoride (CeF4 ) had the highest removal yields, 99...
August 14, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30103485/cationic-high-molecular-weight-lignin-polymer-a-flocculant-for-the-removal-of-anionic-azo-dyes-from-simulated-wastewater
#5
Shoujuan Wang, Fangong Kong, Pedram Fatehi, Qingxi Hou
The presence of dyes in wastewater effluents made from the textile industry is a major environmental problem due to their complex structure and poor biodegradability. In this study, a cationic lignin polymer was synthesized via the free radical polymerization of lignin with [2-(methacryloyloxy) ethyl] trimethyl ammonium chloride (METAC) and used to remove anionic azo-dyes (reactive black 5, RB5, and reactive orange 16, RO16) from simulated wastewater. The effects of pH, salt, and concentration of dyes, as well as the charge density and molecular weight of lignin-METAC polymer on dye removal were examined...
August 11, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/30102127/treated-residue-from-aluminium-lamination-as-adsorbent-of-toxic-reactive-dyes-a-kinetic-equilibrium-and-thermodynamic-study
#6
Tiago José Marques Fraga, Marilda Nascimento Carvalho, Daysianne Mikaella Dos Santos Marques Fraga, Maria do Carmo Lourenço da Silva, Joelma Morais Ferreira, Maurício Alves da Motta Sobrinho
The residue generated in the aluminium cold lamination (TTR) was submitted to a direct burning and then it was calcined at 500°C. BET, FTIR, SEM with EDX and TGA techniques were performed to characterize the adsorbent before and after the adsorption. BET analysis showed that TTR specific surface area was 55.37 m2 ·g-1 and there were no significant changes after the adsorptive process. Afterwards the TTR was applied as adsorbent of the reactive Drimaren Blue (DB), Drimaren Red (DR) and Drimaren Gold (DG). Its employment consists in a sustainable alternative for the treatment of textile wastewater, once the TTR was used as low cost adsorbent of textile dyes...
August 13, 2018: Environmental Technology
https://www.readbyqxmd.com/read/30101772/zero-valent-iron-nanoparticles-for-methylene-blue-removal-from-aqueous-solutions-and-textile-wastewater-treatment-with-cost-estimation
#7
Ahmed Hamdy, Mohamed K Mostafa, Mahmoud Nasr
Nanoscale zero-valent iron (nZVI) particles were investigated for the removal of methylene blue (MB) from aqueous solutions and the treatment of textile industry effluents. The nZVI material was characterized by XRD, TEM, EDS, FTIR, and SEM. It was demonstrated that several functional groups such as C-H, C = C, C-C, and C-O contributed to MB reduction. At initial MB concentration of 70 mg/L, the optimum pH was 6, achieving a removal efficiency of 72.1% using an nZVI dosage of 10 g/L, stirring rate of 150 rpm, and temperature of 30 °C within 30 min...
August 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/30064065/integrated-perspectives-on-the-use-of-bacterial-endophytes-in-horizontal-flow-constructed-wetlands-for-the-treatment-of-liquid-textile-effluent-phytoremediation-advances-in-the-field
#8
Zahid Hussain, Muhammad Arslan, Mumtaz Hasan Malik, Muhammad Mohsin, Samina Iqbal, Muhammad Afzal
Constructed wetlands (CWs) have emerged as cost-effective and sustainable treatment systems for the remediation of industrial wastewaters; nevertheless, their potential has mostly been evaluated in laboratory-scale studies. Likewise, endophytic bacteria can enhance plant growth and reduce phytotoxicity under polluted conditions, but their application with pilot-scale CWs has rarely been evaluated. The present study aims to evaluate on-site performance of endophyte-assisted pilot-scale horizontal flow constructed wetlands (HFCWs) for the remediation of effluent from a textile industry...
October 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/30042880/water-environmental-stress-rebound-effect-and-economic-growth-of-china-s-textile-industry
#9
Yi Li, Jie Shen, Linyi Lu, Yan Luo, Laili Wang, Manhong Shen
The rapid development of China's textile industry (TI) has led to severe water environmental stress. Water environmental stress of China's TI mainly comes from large quantities of discharged wastewater and chemical oxygen demand (COD). The sustainable development of the TI is realized to achieve the decoupling between economic growth and water environmental stress. This study analyzes the decoupling elasticity results from wastewater discharge and COD discharge, respectively. Decoupling results show that TI's wastewater has strong decoupling from economic growth for three years (2002, 2013-2014) while COD has strong decoupling for six years (2002-2003, 2008, 2010, 2013-2014)...
2018: PeerJ
https://www.readbyqxmd.com/read/30041478/forward-osmosis-application-in-manufacturing-industries-a-short-review
#10
REVIEW
Anita Haupt, André Lerch
Forward osmosis (FO) is a membrane technology that uses the osmotic pressure difference to treat two fluids at a time giving the opportunity for an energy-efficient water and wastewater treatment. Various applications are possible; one of them is the application in industrial water management. In this review paper, the basic principle of FO is explained and the state-of-the-art regarding FO application in manufacturing industries is described. Examples of FO application were found for food and beverage industry, chemical industry, pharmaceutical industry, coal processing, micro algae cultivation, textile industry, pulp and paper industry, electronic industry, and car manufacturing...
July 23, 2018: Membranes
https://www.readbyqxmd.com/read/30032091/treatment-of-the-textile-industry-effluent-in-a-pilot-scale-vertical-flow-constructed-wetland-system-augmented-with-bacterial-endophytes
#11
Zahid Hussain, Muhammad Arslan, Mumtaz Hasan Malik, Muhammad Mohsin, Samina Iqbal, Muhammad Afzal
A pilot-scale vertical flow constructed wetland (VFCWs) system was designed, implemented and operated for one year for the treatment of dye-rich real textile effluent. Brachiaria mutica was vegetated to develop VFCWs in which five different textile effluent degrading endophytic bacteria were inoculated. These bacteria were screened based on their dye degrading and plant growth promoting capabilities. The system's performance was evaluated by monitoring physicochemical parameters, nutrients removal, heavy metals reduction, detoxification potential, and persistence of endophytic bacteria in the plant rhizo- and endosphere...
July 19, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/30027374/treatment-of-synthetic-dye-baths-by-fenton-processes-evaluation-of-their-environmental-footprint-through-life-cycle-assessment
#12
Claudia Mildred Grisales, Luis Miguel Salazar, Dorian Prato Garcia
Inorganic and organic constituents present in textile effluents have a noticeable effect on the performance of Fenton processes. However, studies have been focused on simple wastewater matrices that do not offer enough information to stakeholders to evaluate their real potential in large-scale facilities. Chemical auxiliaries, commonly present in textile wastewaters (NaCl = 30 g/L, Na2 CO3  = 5 g/L, and CH3 COONa = 1 g/L), affect both the economic and environmental performance of the process because they increase the treatment time (from 0...
July 19, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30007889/reduction-of-adsorbed-dyes-content-in-the-discharged-sludge-coming-from-an-industrial-textile-wastewater-treatment-plant-using-aerobic-activated-sludge-process
#13
Maroua Haddad, Sami Abid, Moktar Hamdi, Hassib Bouallagui
Dye mass balance study at full-scale industrial textile wastewater (ITW) treatment plant showed that 1.5 ton of excess waste sludge, containing 304.5 Kg of dyes, are daily produced and discharged in landfills. Therefore, this by-product of activated sludge process (ASP) presents a serious environmental problem. In this work, a laboratory and pilot scale investigations were carried out to optimize aerobic biodegradation efficiency to reduce the amount of residual adsorbed dye that will be found in the waste sludge...
October 1, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/30006001/red-disperse-dyes-dr-60-dr-73-and-dr-78-at-environmentally-realistic-concentrations-impact-biochemical-profile-of-early-life-stages-of-zebrafish-danio-rerio
#14
Gabriela Meireles, Michiel A Daam, Ana Letícia Madeira Sanches, Maria V B Zanoni, Amadeu M V M Soares, Carlos Gravato, Danielle P de Oliveira
Dyes have been used for more than twenty thousand years in textile, pharmaceutical, food, cosmetic, and photographic industries, among others. Despite their importance in these applications, dyes can be toxic and resistant to many degradation processes used in wastewater treatment plants. Although a large number of dyes have been released in the environments in high amounts, studies into the environmental toxicity of these substances are still scarce. The aim of this study was to evaluate the potential toxic effects of textile dyes Disperse Red 60, Disperse Red 73 and Disperse Red 78 in zebrafish early life stages...
August 25, 2018: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29981993/crystal-violet-and-toxicity-removal-by-adsorption-and-simultaneous-photocatalysis-in-a-continuous-flow-micro-reactor
#15
Olga Sacco, Mariantonietta Matarangolo, Vincenzo Vaiano, Giovanni Libralato, Marco Guida, Giusy Lofrano, Maurizio Carotenuto
A continuous flow micro-reactor irradiated by UV-LEDs was employed to treat coloured wastewater by adsorption and simultaneous photocatalysis. Zinc oxide (ZnO) immobilized on commercial zeolites pellets in spherical shape (ZEO) was used as catalytic material in a micro-reactor maximizing the photocatalyst exposition to light sources, irradiating uniformly the entire solution volume and improving the mass transfer phenomena. Experimental tests were carried out on crystal violet dye (CV) as one of the main dying agent present in textile wastewater...
July 5, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29977697/sulfur-nitrogen-and-platinum-doped-titania-thin-films-with-high-catalytic-efficiency-under-visible-light-illumination
#16
Boštjan Žener, Lev Matoh, Giorgio Carraro, Bojan Miljević, Romana Cerc Korošec
Titanium dioxide photocatalysts have received a lot of attention during the past decades due to their ability to degrade various organic pollutants to CO2 and H2 O, which makes them suitable for use in environmental related fields such as air and water treatment and self-cleaning surfaces. In this work, titania thin films and powders were prepared by a particulate sol-gel route, using titanium tetrachloride (TiCl4 ) as a precursor. Afterwards, the prepared sols were doped with nitrogen (ammonium nitrate, urea), sulfur (thiourea) and platinum (chloroplatinic acid), coated onto glass substrates by dip-coating, and thermally treated in a muffle furnace to promote crystallization...
2018: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/29958164/ultrasound-enhanced-electrochemical-oxidation-of-alizarin-red-s-on-boron-doped-diamond-bdd-anode-effect-of-degradation-process-parameters
#17
Chengwu Zhu, Chuqi Jiang, Shou Chen, Ruiqiong Mei, Xin Wang, Jun Cao, Li Ma, Bo Zhou, Qiuping Wei, Guangqi Ouyang, Zhiming Yu, Kechao Zhou
Textile wastewater is characterized by high toxicity, complex structure, and resistance to biodegradation. Therefore, advanced oxidation technologies have received extensive attention. However, it is usually difficult to achieve a desired degradation effect using a single technology. The combination of various advanced oxidation technologies is an important way to achieve efficient degradation of organic wastewater. The present investigation was focused on ultrasound enhanced electrochemical oxidation (US-EO) of typical anthracene Alizarin Red S dye on a boron doped diamond anode...
June 22, 2018: Chemosphere
https://www.readbyqxmd.com/read/29944134/kinetic-isotherm-and-thermodynamic-studies-of-the-adsorption-of-dyes-from-aqueous-solution-by-cellulose-based-adsorbents
#18
Yixi Wang, Linyan Zhao, Juan Hou, Huili Peng, Jianning Wu, Zhiyong Liu, Xuhong Guo
In this study, a highly efficient and eco-friendly porous cellulose-based aerogel was synthesized by grafting polyethyleneimine onto quaternized cellulose (PQC) to remove the anionic dye Congo Red (CR). The prepared aerogel had a good flexibility and formability. The adsorbents were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and elemental analysis. The results showed that there were many amino groups on CE/PQC aerogel and the structure was porous, which increased the adsorption capacity...
June 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/29935967/a-test-battery-for-assessing-the-ecotoxic-effects-of-textile-dyes
#19
Gisele Augusto Rodrigues de Oliveira, Daniela Morais Leme, Joaquín de Lapuente, Lara Barroso Brito, Constança Porredón, Laís de Brito Rodrigues, Natália Brull, Joan Txu Serret, Miquel Borràs, Geonildo Rodrigo Disner, Marta Margarete Cestari, Danielle Palma de Oliveira
The textile dyeing industry is one of the main sectors contributing to environmental pollution, due to the generation of large amounts of wastewater loaded with dyes (ca. 2-50% of the initial amount of dyes used in the dye baths is lost), causing severe impacts on human health and the environment. In this context, an ecotoxicity testing battery was used to assess the acute toxicity and genotoxicity of the textile dyes Direct Black 38 (DB38; azo dye) and Reactive Blue 15 (RB15; copper phthalocyanine dye) on different trophic levels...
August 1, 2018: Chemico-biological Interactions
https://www.readbyqxmd.com/read/29929074/assessment-on-the-decolourization-of-textile-dye-reactive-yellow-using-pseudomonas-sp-immobilized-on-fly-ash-response-surface-methodology-optimization-and-toxicity-evaluation
#20
Uttariya Roy, Shubhalakshmi Sengupta, Priya Banerjee, Papita Das, Avijit Bhowal, Siddhartha Datta
This study focuses on the investigation of removal of textile dye (Reactive Yellow) by a combined approach of sorption integrated with biodegradation using low cost adsorbent fly ash immobilized with Pseudomonas sp. To ensure immobilization of bacterial species on treated fly ash, fly ash with immobilized bacterial cells was characterized using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and fluorescence microscopy. Comparative batch studies were carried out using Pseudomonas sp, fly ash and immobilized Pseudomonas sp on flyash and were observed that immobilized Pseudomonas sp on flyash acted as better decolourizing agent...
June 18, 2018: Journal of Environmental Management
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