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https://www.readbyqxmd.com/read/30305994/enzymatic-detoxification-of-azo-dyes-by-a-multifarious-bacillus-sp-strain-mr-1-2-bearing-plant-growth-promoting-characteristics
#1
Muhammad Shahid, Faisal Mahmood, Sabir Hussain, Tanvir Shahzad, Muhammad Zulqarnain Haider, Muhammad Noman, Aqsa Mushtaq, Qundeel Fatima, Temoor Ahmed, Ghulam Mustafa
This study was conducted to elucidate the inherent potential of Bacillus sp. MR-1/2, which was isolated from root zone of maize crop grown on a textile wastewater-irrigated soil. The isolated strain was identified through its ribosomal RNA sequence. Under in vitro conditions, the strain demonstrated its tolerance for high concentrations of various heavy metal ions as determined by minimum inhibitory concentration. Moreover, the strain MR-1/2 exhibited many important phytobeneficial traits such as inorganic P solubilization and 1-aminocyclopropane-1-carboxylate (ACC) deaminase ability even under high metal and salt stress...
October 2018: 3 Biotech
https://www.readbyqxmd.com/read/30295128/a-highly-stable-laccase-from-bacillus-subtilis-strain-r5-gene-cloning-and-characterization
#2
Saadia Basheer, Naeem Rashid, Muhammad Sohail Akram, Muhammad Akhtar
The gene encoding copper-dependent laccase from Bacillus subtilis strain R5 was cloned and expressed in Escherichia coli. Initially the recombinant protein was produced in insoluble form as inclusion bodies. Successful attempts were made to produce the recombinant protein in soluble and active form. The laccase activity of the recombinant protein was highly dependent on the presence of copper ions in the growth medium and microaerobic conditions during protein production. The purified enzyme exhibited highest activity at 55 °C and pH 7...
October 8, 2018: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/30279571/surfactant-organic-solvent-free-single-step-engineering-of-hybrid-graphene-pt-tio-2-nanostructure-efficient-photocatalytic-system-for-the-treatment-of-wastewater-coming-from-textile-industries
#3
Zafar Khan Ghouri, Khaled Elsaid, Ahmed Abdala, Saeed Al-Meer, Nasser A M Barakat
In this study, hybrid graphene-Pt/TiO2 nanostructure were synthesized by single-step, inexpensive and surfactant/organic solvent free route; hydrothermal technique. The physicochemical properties of hybrid graphene-Pt/TiO2 nanostructure were carefully analyzed by multiple techniques, including X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscope (FESEM) and transmission electron microscope (TEM). The synthesized hybrid nanostructures were utilized as photocatalyst for the degradation of methylene blue (MB) dye under natural environment at average ambient temperature and mean daily global solar radiation, of about 22-25 °C and 374...
October 2, 2018: Scientific Reports
https://www.readbyqxmd.com/read/30257090/rightsizing-nanochannels-in-reduced-graphene-oxide-membranes-by-solvating-for-dye-desalination
#4
Liang Huang, Suting Huang, Surendar R Venna, Haiqing Lin
Membranes with high water permeance, near-zero rejection to inorganic salts (such as NaCl and Na2SO4), and almost 100% rejection to organic dyes are of great interest for the dye desalination (the separation of dyes and salts) of textile wastewater. Herein, we prepared reduced graphene oxide membranes in a solvation state (S-rGO) with nanochannel sizes rightly between the salt ions and dye molecules. The S-rGO membrane rejects >99.0% of Direct Red 80 (DR 80) and has almost zero rejection for Na2SO4. By contrast, conventional GO or rGO membranes often have the channel sizes smaller than divalent ions (such as SO42-) and thus high rejection for Na2SO4...
September 26, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/30245411/optimization-and-toxicity-assessment-of-a-combined-electrocoagulation-h-2-o-2-fe-2-uv-and-activated-carbon-adsorption-for-textile-wastewater-treatment
#5
Edison GilPavas, Izabela Dobrosz-Gómez, Miguel-Ángel Gómez-García
In this study, the potential application of sequential Electrocoagulation + Fenton (F) or Photo-Fenton (PF) + Active carbon adsorption (EC + F/PF + AC) processes were analyzed as alternatives for the treatment of an industrial textile wastewater resulting from an industrial facility located in Medellín (Colombia). In order to maximize the organic matter degradation, each step of the treatment was optimized using the Response Surface Methodology. At first, the optimal performance of EC was achieved with Fe electrodes operating at pH = 7, jEC  = 10 mA/cm2 and 60 rpm, during 10 min of electrolysis...
September 11, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/30245294/toxicity-evaluation-of-textile-dyeing-effluent-and-its-possible-relationship-with-chemical-oxygen-demand
#6
Jieying Liang, Xun-An Ning, Jian Sun, Jian Song, Jie Lu, Haili Cai, Yanxiang Hong
Textile dyeing wastewater was the focus of much research because of its adverse effect on aquatic biota. In the present research, textile dyeing influent and effluent samples were collected from four textile dyeing wastewater treatment plants (TDPs) in Guangdong province, China, and their conventional indicators and toxicity were examined to reveal relationships. The relationship between toxicity and chemical oxygen demand (COD) was clearly established at individual TDPs. Results indicated the highest removal efficiencies of 94...
September 21, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30240998/removal-of-micropollutants-from-water-in-a-continuous-flow-electrical-discharge-reactor
#7
Niels Wardenier, Patrick Vanraes, Anton Nikiforov, Stijn W H Van Hulle, Christophe Leys
The emergence of micropollutants into our aquatic resources is regarded as an issue of increasing environmental concern. To protect the aquatic environment against further contamination with micropollutants, treatment with advanced oxidation processes (AOPs) is put forward as a promising technique. In this work, an innovative AOP based on electrical discharges in a continuous-flow pulsed dielectric barrier discharge (DBD) reactor with falling water film over activated carbon textile is examined for its potential application in water treatment...
August 30, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30236469/interactions-between-polybrominated-diphenyl-ethers-pbdes-and-tio-2-nanoparticle-in-artificial-and-natural-waters
#8
Xinzhe Wang, Adeyemi S Adeleye, Huihui Wang, Min Zhang, Mengmeng Liu, Yingying Wang, Yao Li, Arturo A Keller
Polybrominated diphenyl ethers (PBDEs) are widely used as flame retardants in a variety of products, including textiles. PBDEs are thus exposed to the natural environment, including wastewater, waterbodies and sediments (at different phases of products' lifecycles), where they will interact with other pollutants. Studies on the interactions between organic pollutants and engineered nanoparticles (NPs) in natural waters are rare. In this study, we investigated the effects of two common PBDEs-BDE 47 and BDE 209-on the physicochemical properties and colloidal stability of TiO2 NP in simple aqueous media and two natural waters (river water and wastewater)...
September 8, 2018: Water Research
https://www.readbyqxmd.com/read/30229101/moo-3-nps-zif-8-composite-material-prepared-via-rcvd-for-photodegradation-of-dyes
#9
Matteo Ciprian, Peng Xu, Somboon Chaemchuen, Rong Tu, Serge Zhuiykov, Philippe M Heynderickx, Francis Verpoort
Toxic wastewaters from the textile industry have made its way into rivers and other waterways, posing a serious health treat on both human and wildlife. Herein, this data set presents the potential use of MoO3 nanoparticles supported on ZIF-8 in the photodegradation of a cationic dye molecule. The data presented in this article report a concise description of experimental conditions for the spray-dried ZIF-8 synthesis and subsequent deposition of MoO3 nanoparticles via rotary chemical vapor deposition (RCVD)...
August 2018: Data in Brief
https://www.readbyqxmd.com/read/30208557/in-situ-phytoremediation-of-dyes-from-textile-wastewater-using-garden-ornamental-plants-effect-on-soil-quality-and-plant-growth
#10
Vishal V Chandanshive, Suhas K Kadam, Rahul V Khandare, Mayur B Kurade, Byong-Hun Jeon, Jyoti P Jadhav, Sanjay P Govindwar
In situ phytoremediation of dyes from textile wastewater was carried out in a high rate transpiration system ridges (91.4 m × 1.0 m) cultivated independently with Tagetes patula, Aster amellus, Portulaca grandiflora and Gaillardia grandiflora which reduced American Dye Manufacturers Institute color value by 59, 50, 46 and 73%, respectively within 30 d compared to dye accumulated in unplanted ridges. Significant increase in microbial count and electric conductivity of soil was observed during phytoremediation...
November 2018: Chemosphere
https://www.readbyqxmd.com/read/30176417/efficient-decontamination-of-textile-industry-wastewater-using-a-photochemically-stable-n-n-type-cdse-ag-3-po-4-heterostructured-nanohybrid-containing-metallic-ag-as-a-mediator
#11
Yeong Gyeong Kim, Wan-Kuen Jo
To address the environmental hazard posed by the discharge of textile industry wastewater, we combined n-type (CdSe) and n-type (Ag3 PO4 ) visible-light-responsive semiconductors to produce a photochemically stable n-n type heterostructured nanohybrid comprising metallic Ag (CdSe/Ag/Ag3 PO4 , CAA) and employed this material as a catalyst for the decomposition of phenol and rhodamine B (RhB). The physicochemical properties of CAA and reference photocatalysts were investigated using instrumental techniques. Compared to individual Ag3 PO4 and CdSe, CAA showed an elevated photocatalytic decomposition efficiency for both target pollutants, which was mainly attributed to increased charge separation efficiency and explained by the operation of the Z-scheme reaction mechanism...
January 5, 2019: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30173033/organophosphate-flame-retardants-opfrs-a-review-on-analytical-methods-and-occurrence-in-wastewater-and-aquatic-environment
#12
REVIEW
Ioanna Pantelaki, Dimitra Voutsa
Nowadays, there is an increasing concern for organophosphate flame retardants (OPFRs) due to high production and use following the phase out and stringent regulation in the use of brominated flame retardants. OPFRs represent a group of compounds with a wide range in their polarity, solubility and persistence. OPFRs are widely used as flame retardants in various consumer products such as textiles, electronics, industrial materials and furniture to prevent the risk of fire. They are also utilized as plasticizers, antifoaming or anti-wear agents in lacquers, hydraulic fluids and floor polishing agents...
February 1, 2019: Science of the Total Environment
https://www.readbyqxmd.com/read/30152823/rational-design-and-synthesis-of-highly-oriented-copper-zinc-ferrite-qds-titania-nae-nano-heterojunction-composites-with-novel-photoelectrochemical-and-photoelectrocatalytic-behaviors
#13
Shiying Fan, Xinyong Li, Qidong Zhao, Libin Zeng, Mingmei Zhang, Zhifan Yin, Tingting Lian, Moses O Tadé, Shaomin Liu
This work reported that novel highly oriented and vertically aligned stoichiometric copper- and zinc-based ferrites, i.e., Cu0.5Zn0.5Fe2O4 quantum dots (QDs) anchored with TiO2 nanotube array electrode (NAE) composites, with n-n nano-heterojunctions and highly effective simulated solar light harvesting could be successfully achieved via electrochemical anodization followed by a vacuum-assisted impregnation strategy. It has been observed that Cu0.5Zn0.5Fe2O4 QDs/TiO2 NAE composites exhibit distinctly enhanced visible light photoelectrocatalytic (PEC) performance toward the degradation of typical pollutants including sulfamethoxazole (SMX) and methylene blue (MB) as compared to that of pristine TiO2 NAEs, which can be attributed to the synergistic effect of heterostructures with strong interfacial interaction and abundant 1D nanotube array structures to facilitate efficient spatial charge separation and interfacial transfers...
September 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30128100/removal-of-reactive-black-5-dye-from-aqueous-solutions-by-coupled-electrocoagulation-and-bio-adsorbent-process
#14
Behnaz Naraghi, Mohammad Mehdi Baneshi, Reza Amiri, Amin Dorost, Hamed Biglari
Background: Textile wastewater contains a significant amount of bio dye compounds including Reactive Black 5 (RB5) as an Azo dye that causes serious damage to the environment and aquatic life in receiving water resources. It is estimated that approximately 15% of the dyestuff is discharged into water bodies and 50% of those are Azo dyes. Objective: The aim of this study was to examine the effectiveness of combining electrocoagulation and bio-adsorption methods using the active carbons from Kenya tea waste to remove RB5 from aquatic solutions...
July 2018: Electronic Physician
https://www.readbyqxmd.com/read/30126497/textiles-wastewater-treatment
#15
Dongyang Deng, Niroj Aryal, Andrea Ofori-Boadu, Manoj K Jha
A review of the literature published in 2017 on topics related to textiles wastewater treatment is presented. This review includes the following sections: brief introduction of textiles wastewater treatment, review of current treatment technologies categorized into physicochemical, biological, and combined processes. In the end, the authors have discussed future of the topic.
October 1, 2018: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/30121537/comparison-of-different-detoxification-pilot-plants-for-the-treatment-of-industrial-wastewater-by-solar-photo-fenton-are-raceway-pond-reactors-a-feasible-option
#16
A Cabrera-Reina, S Miralles-Cuevas, G Rivas, J A Sánchez Pérez
This paper represents a first approach in the study of photoreactor selection to treat industrial wastewater using solar photo-Fenton. In this context, simulated textile industry effluent containing a mixture of four dyes at different initial dissolved organic carbon (DOC) concentrations (45, 90, 180 and 270 mg/L) was treated by using three different solar reactor geometries: (i) tubular (5 cm diameter) provided with compound parabolic collector (ii) tubular (5 cm diameter) provided with flat collector and (iii) open channels forming raceway ponds with two liquid depths (5 and 15 cm)...
August 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/30119003/a-comparison-between-digital-camera-and-spectrophotometer-for-sensitive-and-selective-kinetic-determination-of-brilliant-green-in-wastewaters
#17
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...
January 5, 2019: 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
#18
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...
September 18, 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
#19
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
#20
Elham Keshmirizadeh, Hamid Modarress, Fatemeh Jahedi
The removal of Acid Blue 62 (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 is 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
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