scholarly journals Ion-capture electrodialysis using multifunctional adsorptive membranes

Science ◽  
2021 ◽  
Vol 372 (6539) ◽  
pp. 296-299
Author(s):  
Adam A. Uliana ◽  
Ngoc T. Bui ◽  
Jovan Kamcev ◽  
Mercedes K. Taylor ◽  
Jeffrey J. Urban ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Treatment ◽  
Water Sources ◽  
Clean Water ◽  
Water Treatment Plants ◽  
Porous Aromatic Framework ◽  
Global Demand ◽  
One Step ◽  
Separation Strategy ◽  
Competing Ions

Technologies that can efficiently purify nontraditional water sources are needed to meet rising global demand for clean water. Water treatment plants typically require a series of costly separation units to achieve desalination and the removal of toxic trace contaminants such as heavy metals and boron. We report a series of robust, selective, and tunable adsorptive membranes that feature porous aromatic framework nanoparticles embedded within ion exchange polymers and demonstrate their use in an efficient, one-step separation strategy termed ion-capture electrodialysis. This process uses electrodialysis configurations with adsorptive membranes to simultaneously desalinate complex water sources and capture diverse target solutes with negligible capture of competing ions. Our methods are applicable to the development of efficient and selective multifunctional separations that use adsorptive membranes.

Semi-permanent hair dyes degradation at W/WO3 photoanode under controlled current density assisted by visible light

2017 ◽  
Vol 20 (2) ◽  
Author(s):  
Luciano Evangelista Fraga ◽  
Thais Tasso Guaraldo ◽  
Bárbara Camila de Araújo Souza ◽  
Maria Valnice Boldrin Zanoni
Keyword(s):  
Water Treatment ◽  
Visible Light ◽  
Environmental Protection ◽  
Human Health ◽  
Current Density ◽  
Water Sources ◽  
Hair Dyes ◽  
Water Treatment Plants ◽  
Beauty Salons ◽  
Dyes Degradation

AbstractThe indiscriminate use of hair dyes has attracted great deal of attention due to its toxicological and mutagenic aspects demonstrated by some of these substances. Thus, the effluent from beauty salons and domestic sewages if not properly treated can reach water treatment plants and water sources, enhancing human health and environmental protection concern. This work explores the application of photoelectrocatalytic process on Basic Brown 16 and Basic Blue 99 degradation as model of basic hair dyes pollutants. W/WO

scholarly journals WATER TREATMENT IN RAUDHATUL ISLAMIYAH MOSQUE JAWA TENGAH VILLAGE, SUI.AMBAWANG SUB DISTRICT, KUBU RAYA DISTRICT

2020 ◽  
Vol 4 (3) ◽  
pp. 320
Author(s):  
Ulli Kadaria ◽  
Aini Sulastri
Keyword(s):  
Water Treatment ◽  
Daily Activities ◽  
Processing Capacity ◽  
Clean Water ◽  
Water Treatment Plants ◽  
Operation And Maintenance ◽  
Treatment Equipment ◽  
Training Activities ◽  
And Training ◽  
Participatory Method

<p><em>Raudhatul Islamiyah Mosque which is located on Jl. Trans Kalimantan, Jawa Tengah Village, Sungai Ambawang District, Kubu Raya District is one of the mosques that had problem in fulfill the demand of clean water for flushing and daily activities. The water used comes from artesian well whose quality and quantity were inadequate. This had an impact on the damage to mosque facilities such as faucet because of rust and the bathtub turn brownish yellow. Besides flushing, activity in the form of mouthwash - gargle using water that was yellowish brown and smelly can potentially cause disease because of the presence of iron, organic matter, microbes, and others. Therefore it needed a water treatment that treats water quality so that it was safe to use. Water treatment was designed using aeration and shell sand filtration with a processing capacity of 1000 liters. The method used in this activity was the participatory method where the youth at the mosque participated in socialization and training activities, making water treatment plants, operation and maintenance water treatment equipment. In addition there was an operational standard manual to facilitate the operation and maintenance of the water treatment equipment.<br /><br /></em><strong>ABSTRACT (INDONESIAN): </strong>Masjid Raudhatul Islamiyah yang terletak di Jl.Trans Kalimantan, Desa Jawa Tengah, Kecamatan Sungai Ambawang, Kabupaten Kubu Raya merupakan salah satu masjid yang memiliki permasalahan dalam pemenuhan kebutuhan air bersih untuk wudhu dan aktivitas harian lainnya. Air yang digunakan berasal dari sumur bor yang kualitas dan kuantitasnya kurang memadai. Hal tersebut berdampak pada rusaknya fasilitas masjid berupa keran air wudhu karena karat dan beberapa fasilitas masjid salah satunya adalah bak kamar mandi menjadi berwarna kuning kecoklatan. Selain itu aktivitas wudhu berupa kumur – kumur menggunakan air yang berwarna kuning kecoklatan dan berbau dapat berpotensi mengakibatkan penyakit karena adanya kandungan besi, zat organik, mikroba, dan lainnya. Oleh sebab itu diperlukan suatu instalasi pengolahan air yang mampu mengolah kualitas air sehingga aman untuk digunakan. Pengolahan air yang dirancang menggunakan proses aerasi dan filtrasi pasir kerang dengan kapasitas pengolahan sebesar 1000 liter. Metode yang digunakan dalam kegiatan ini adalah dengan metode parsipatori dimana remaja masjid ikut berpartisipasi dalam kegiatan sosialisasi dan pelatihan, pembuatan instalasi pengolahan air, operasional dan pemeliharaan alat pengolahan air. Selain itu terdapat buku panduan standar operasional untuk mempermudah operasional dan pemeliharaan alat.</p>

scholarly journals Antibiotic resistance profiles of Escherichia coli isolated from different water sources in the Mmabatho locality, Northwest Province, South Africa

2010 ◽  
Vol 106 (1/2) ◽  
Author(s):  
Constance N. Wose Kinge ◽  
C. Njie Ateba ◽  
D. Tonderai Kawadza
Keyword(s):  
Escherichia Coli ◽  
Antibiotic Resistance ◽  
Water Treatment ◽  
Tap Water ◽  
Water Sources ◽  
Diffusion Method ◽  
Index Test ◽  
E Coli ◽  
Water Treatment Plants ◽  
Different Water Sources

The antibiotic resistance profiles of Escherichia coli (E. coli), isolated from different water sources in the Mmabatho locality were evaluated. Water samples were collected from the local wastewater- and water-treatment plants, the Modimola Dam and homes in the area, and then analysed for the presence of E. coli, using standard methods. Presumptive isolates obtained were confirmed by the analytical profile index test. Antibiotic susceptibility testing was performed by the disc diffusion method. Of the 230 E. coli isolates tested, marked antibiotic resistances (over 70%) were observed for erythromycin, tetracycline, ampicillin, chloramphenicol and norfloxacin. Multiple antibiotic resistance patterns were also compiled. Overall, the phenotype T-Ap-E was frequent for E. coli isolated from the local wastewater and water-treatment plants, Modimola Dam and tap water. Cluster analysis performed showed a unique antibiotic resistance pattern which suggested a link between isolates from all sampling points. The findings indicated that improper wastewater treatment may have a potential impact on the dissemination and survival of E. coli, as well as other pathogenic bacteria in water for human and animal consumption. This may result in water- and food-borne disease outbreaks with a negative effect on antibiotic therapy.

Assessment of selected heavy metals in some water treatment plants and household tap water in Greater Cairo, Egypt

2008 ◽  
Vol 19 (3) ◽  
pp. 367-376 ◽  
Author(s):  
M.R. Lasheen ◽  
G. El‐Kholy ◽  
C.M. Sharaby ◽  
I.Y. Elsherif ◽  
S.T. El‐Wakeel
Keyword(s):  
Heavy Metals ◽  
Water Treatment ◽  
Tap Water ◽  
Water Treatment Plants ◽  
Greater Cairo

scholarly journals Inhibition of Activated Sludge Respiration by Heavy Metals

2020 ◽  
Vol 14 ◽  
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Heavy Metal ◽  
Water Treatment ◽  
Activated Sludge ◽  
Waste Water Treatment ◽  
Domestic Waste ◽  
Heavy Metal Concentrations ◽  
Water Treatment Plants ◽  
Different Types

Inhibition of the respiration microbial activity in the activated sludge caused by heavy metal concentrations (Cr, Cd, Cu and Ni) was studied by means of respirometric method using Strathtox respirometer (Strathkelvin Glasgow).The studied sludge samples were obtained from the two waste water treatment plants with different types of pollution (municipal waste water and domestic waste water)

scholarly journals NOM removal and residual Al minimization by enhanced coagulation: roles of sequence dosing with PACl–FeCl3

2020 ◽  
Vol 69 (6) ◽  
pp. 616-628
Author(s):  
Ming-Han Tsai ◽  
Lap-Cuong Hua ◽  
Kochin Huang ◽  
Chihpin Huang
Keyword(s):  
Organic Matter ◽  
Water Treatment ◽  
Natural Organic Matter ◽  
Clean Water ◽  
Polyaluminum Chloride ◽  
Enhanced Coagulation ◽  
Water Treatment Plants ◽  
Promising Application ◽  
Residual Al ◽  
Single Dosing

Abstract To remove higher proportions of natural organic matter (NOM) in water treatment plants, over dosing of Al-based coagulant is frequently applied. However, this leads to the risk of an excess of coagulant residue in the clean water. In this study, sequential coagulation with polyaluminum chloride (PACl) and FeCl3 was proposed to improve the removal of NOM as well as to minimize residual Al. Single dosing with either PACl or FeCl3 in particular was compared with sequential coagulation, with different dosing sequences of PACl–FeCl3 (P–F) or FeCl3–PACl (F–P). At optimum dosage, sequential coagulation P–F showed twice as much dissolved organic carbon (DOC) removal from water containing algogenic organic matter, compared to single dosing of PACl and sequential coagulation F–P. However, sequential coagulation F–P was the most effective approach for humic substance removal that improved DOC removal up to &gt;70% compared to other dosing approaches (&lt;60%). Practical treatment with real water also showed the advantages of sequential coagulation with P–F in improving the removal of low SUVA NOM by 18% compared to the traditional single dosing of PACl. As expected, the Al residues found in both sequential coagulation (0.07 mg/L) were significantly reduced compared to single dosing with PACl (0.15 mg/L), indicating the promising application of sequential coagulation for future safe water treatment.

Assessment of a wastewater stabilization pond system for removal of arsenic, iron, and ammonia from reverse osmosis water treatment plant residual wastewater

2021 ◽  
Author(s):  
Harrison Bull ◽  
Ali Ekhlasi Nia ◽  
Mohsen Asadi ◽  
Kerry McPhedran
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Water Treatment ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Depth Data ◽  
Water Treatment Plants ◽  
Removal Of Arsenic ◽  
Wastewater Stabilization Ponds

Drinking water treatment plants (DWTPs) produce wastewaters with elevated concentrations of heavy metals, metalloids, ammonia, and other contaminants. These wastewaters require treatment via processes including wastewater stabilization ponds (WSPs). This study assessed the arsenic (As), iron (Fe), and ammonia (NH3) concentrations in a Saskatchewan DWTP WSP system of five sequential ponds. Drone imaging combined with flow and depth data was used to estimate retention times which increased from 7-9 to 8-10 days after the DWTP upgrade. Concentration trends showed Fe decreased from Pond 1 to 3 and increased in Ponds 3 and 5, while As decreased from Pond 1 to 5. Average effluent As concentrations of 10.6 µg/L were over the 5.0 µg/L guideline, while both Fe and NH3 concentrations guidelines were easily met post-upgrade in 2020. Several actions are recommended to ensure adequate WSP operation including dredging, aeration, and installing macrophytes capable of As uptake.

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