Efficient removal of acid dyes using permanent magnetic resin and its preliminary investigation for advanced treatment of dyeing effluents

2020 ◽  
Vol 251 ◽  
pp. 119694 ◽  
Author(s):  
Ji Wu ◽  
Qimeng Li ◽  
Wentao Li ◽  
Yan Li ◽  
Guoxiang Wang ◽  
...  
Keyword(s):  
Preliminary Investigation ◽  
Advanced Treatment ◽  
Acid Dyes ◽  
Efficient Removal ◽  
Magnetic Resin

Tertiary treatment of Berlin WWTP effluents with ferrate (Fe(VI))

2013 ◽  
Vol 68 (7) ◽  
pp. 1665-1671 ◽  
Author(s):  
U. Hübner ◽  
M. Jekel
Keyword(s):  
Surface Waters ◽  
Major Product ◽  
Advanced Treatment ◽  
Dual Function ◽  
Secondary Effluent ◽  
Tertiary Treatment ◽  
Efficient Removal ◽  
Promising Alternative ◽  
Secondary Effluents ◽  
The Eu

New and higher standards in the EU water framework directive necessitate advanced treatment of secondary effluents for reduction of trace organic compounds (TrOCs) and nutrients before the discharge into receiving surface waters. Due to its dual function as oxidant and coagulant, ferrate is considered as a promising alternative for tertiary treatment. The oxidation of selected TrOCs and simultaneous flocculation of phosphates by ferrate was tested in batch experiments with secondary effluent from Berlin Ruhleben. The concentrations of carbamazepine (CBZ) and diclofenac were reduced by >90% with ferrate dosages of 6 mg/L as Fe. CBZ was transformed to 1-(2-benzaldehyde)-4-hydro-(1H,3H)-quinazoline-2-one, which is known as the major product from the reaction of CBZ with ozone. In contrast to ozonation, no further transformation of this product was observed. The concentration of ibuprofen was not reduced by ferrate treatment. For efficient removal of 60–100 μg/L phosphate-P to values <20 μg/L, ferrate dosages of 3–4 mg/L as Fe were sufficient.

Advanced Treatment of Coking Wastewater by Coagulation with PAC

2010 ◽  
Vol 159 ◽  
pp. 499-504 ◽  
Author(s):  
Yi Zheng ◽  
Zhuo Zhang ◽  
Hong Tao Hu ◽  
Xia Liang Wei
Keyword(s):  
Reaction Time ◽  
Optimal Condition ◽  
High Speed ◽  
Dynamic Condition ◽  
Advanced Treatment ◽  
Coking Wastewater ◽  
Efficient Removal ◽  
Low Speed ◽  
Integrated Technique

An integrated technique was investigated, aiming to provide an effective method for the treatment of biologically treated coking wastewater and to reduce pollutants to concentration values below the limits imposed by the legislation. Coking wastewater containing 270 mg/L COD and 202 times color was treated by coagulation using PAC as well as PAC +PAM, respectively. The application of coagulation using PAC+PAM resulted to a much more efficient removal of color, COD and SS in comparison with single coagulation without PAC. The optimal condition for coagulation with PAC was pH 8, dosage 75 mg/L and dynamic condition 1-minute high speed stirring followed by 15-minute low speed stirring. The optimal condition for coagulation with PAC and PAM was: PAM dosage of 6 mg/L, PAC dosage of 70 mg/L, pH of 8 and reaction time of 20 minutes. Both processes of coagulation were found to be efficient for removal of COD from coking wastewater, but ineffective in reducing color.

Retention of pharmaceutical residues and microorganisms at the Altendorf retention soil filter

2014 ◽  
Vol 70 (9) ◽  
pp. 1503-1509 ◽  
Author(s):  
E. Christoffels ◽  
F. M. Mertens ◽  
T. Kistemann ◽  
C. Schreiber
Keyword(s):  
Escherichia Coli ◽  
Heavy Metals ◽  
Giardia Lamblia ◽  
Microbial Contamination ◽  
Advanced Treatment ◽  
Organic Micropollutants ◽  
Combined Sewer Overflows ◽  
Efficient Removal ◽  
Pharmaceutical Residues ◽  
Combined Sewer

A study has been conducted on a retention soil filter (RSF) to test its effectiveness in removing pharmaceutical residues and microorganisms from combined sewer overflows (CSOs). Efficient removal of solids, nutrients and heavy metals has already been proven. The possibility that organic micropollutants and microorganisms are also retained by the use of RSFs has been identified, but data are lacking. Results obtained in this study, in which testing for removal by a RSF of numerous micropollutant substances was performed, are most promising. The pharmaceuticals diclofenac and ibuprofen are presented in detail as examples of such micropollutants. Both showed a reduction in positive samples of more than 55% as well as a significant reduction in median and maximum concentrations. For microorganisms such as Escherichia coli, coliphages and Giardia lamblia (cysts), an average reduction in concentrations by three logarithmic steps (99.9%) was achieved. These results add to the evidence that using a RSF in the advanced treatment of wastewater from CSOs reduces the exposure of watercourses to pharmaceutical residues and microbial contamination.

Efficient removal of Cu(II) and citrate complexes by combined permanent magnetic resin and its mechanistic insights

2019 ◽  
Vol 366 ◽  
pp. 1-10 ◽  
Author(s):  
Qimeng Li ◽  
Haiou Song ◽  
Ruiming Han ◽  
Guoxiang Wang ◽  
Aimin Li
Keyword(s):  
Efficient Removal ◽  
Magnetic Resin

Synthesis, characterisation and preliminary investigation of the haemocompatibility of poly(d,l-lactide-co-glycolide)–poly(ethyleneglycol)–poly(d,l-lactide-co-glycolide) copolymer for simvastatin delivery

2017 ◽  
Vol 32 (6) ◽  
pp. 641-653 ◽  
Author(s):  
Fengzhe Wang ◽  
Xuan Liu ◽  
Longbao Feng ◽  
Qiyu Zhu ◽  
Shina Yan ◽  
...  
Keyword(s):  
Red Blood Cells ◽  
Prothrombin Time ◽  
Partial Thromboplastin Time ◽  
Blood Cells ◽  
Drug Carrier ◽  
Preliminary Investigation ◽  
Activated Partial Thromboplastin Time ◽  
Advanced Treatment ◽  
Osseous Tissue ◽  
Human Red Blood Cells

The development of nanomedicine has provided advanced treatment opportunities for many diseases. Simvastatin, a widely used anti-lipidaemic drug, has potential for the treatment of orthopaedic diseases. However, the clinical application of simvastatin is limited because of its hydrophobicity and lack of distribution in osseous tissue. In this study, an amphiphilic nanoparticle, poly(d,l-lactide- co-glycolide)–poly(ethyleneglycol)–poly(d,l-lactide- co-glycolide), was synthesised to improve the biocompatibility of simvastatin. The haemocompatibility of the poly(d,l-lactide- co-glycolide)–poly(ethyleneglycol)–poly(d,l-lactide- co-glycolide) copolymer was investigated through its aggregation, morphology and lysis of human red blood cells, along with its impact on the clotting function according to the activated partial thromboplastin time, prothrombin time and thromboelastographic assays. The results demonstrated that the poly(d,l-lactide- co-glycolide)–poly(ethyleneglycol)–poly(d,l-lactide- co-glycolide) copolymer with a concentration lower than 10 mg/mL had little impact on the aggregation, morphology or lysis of red blood cells, or on blood coagulation. Therefore, the copolymer may be a strong alternative candidate as an effective and safe drug carrier.

Surface ultrastructure of danazol treated rat endometrium: A SEM study

1983 ◽  
Vol 41 ◽  
pp. 556-557
Author(s):  
R.P. Apkarian ◽  
J.S. Sanfilippo
Keyword(s):  
Cross Sections ◽  
Reproductive Tract ◽  
Preliminary Investigation ◽  
Breast Disease ◽  
Distal Segment ◽  
Uterine Horn ◽  
Female Reproductive Tract ◽  
Ultrastructural Changes ◽  
Cycle Phase ◽  
Sprague Dawley

The synthetic androgen danazol, is an isoxazol derivative of ethisterone. It is utilized in the treatment of endometriosis, fibrocystic breast disease, and has a potential use as a contraceptive. A study was designed to evaluate the ultrastructural changes associated with danazol therapy in a rat model. The preliminary investigation of the distal segment of the rat uterine horn was undertaken as part of a larger study intended to elucidate the effects of danazol on the female reproductive tract.Cross-sections (2-3 mm in length) of the distal segment of the uterine horn from sixteen Sprague-Dawley rats were prepared for SEM. Ten rats in estrus served as controls and six danazol treated rats were noted to have alterations of the estrus cycle i.e. a lag in cycle phase or noncycling patterns. Specimens were fixed in 3% glutaraldehyde in 0.05M phosphate buffer containing CaCl2 at pH 7.0-7.4 and chilled to 4°C. After a brief wash in distilled water, specimens were passed through a graded series of ethanol, critical point dryed in CO2 from absolute ethanol, and coated with 6nm Au. Observations were made with an IS1-40 SEM operated at 15kV.

A Comparison of the Ultrastructural Morphology of Hepatic Necrosis in BDF1 Mice

1981 ◽  
Vol 39 ◽  
pp. 586-587
Author(s):  
Becky Jackson
Keyword(s):  
Endoplasmic Reticulum ◽  
Smooth Endoplasmic Reticulum ◽  
Preliminary Investigation ◽  
Hepatic Necrosis ◽  
Hepatic Tissue ◽  
Pronounced Increase ◽  
Glycogen Store ◽  
Ultrastructural Morphology ◽  
Mitochondrial Integrity ◽  
Glycogen Stores

Preliminary investigation has indicated similarity in hepatic ultrastructural morphology in nutritional deprivation, and cyanide induced hepatic necrosis. Analysis of hepatic tissue has indicated disruption of intracellular membranes, specifically, reduction in rough endoplasmic reticulum (RER) mitochondrial integrity, and glycogen stores. An increase in smooth endoplasmic reticulum (SER) portion was observed.To further investigate the apparent equivalence of necrotic morphology, ultrastructura1ly, BDF1 mice were subjected to senescence, nutritional deprevation, potassium cyanide (KCN) induced toxemia, and acetaminophen induced toxemia. Controls were utilized to ellucidate non-necrotic hepatocellular normals. U1trastructura1 investigation of controls (Fig. 1) shows densely granular RER, abundant glycogen stores, and morphologically normal mitochondria. Subjects with acetaminophen induced necrosis exhibit reduced normal RER with increased levels of dialated, vesicular RER in apparent conversion to SER (Fig. 2), loss of mitochondrial integrity, and glycogen store reduction. Senescent subjects exhibit a pronounced increase in SER and loss of glycogen store. (Fig. 3). Investigation of the senescent SER at high magnification (Fig. 5) indicates that the SER is arising from degranulating and vesiculating RER.

Ultrastructural Effects of Acute Kepone Treatment in Rats

1976 ◽  
Vol 34 ◽  
pp. 286-287
Author(s):  
Richard L. Klein ◽  
Åsa K. Thureson-Klein ◽  
Harihara M. Mehendale
Keyword(s):  
Neurological Disorders ◽  
Corn Oil ◽  
Preliminary Investigation ◽  
Reproductive Capacity ◽  
Ultrastructural Changes ◽  
Lipid Deposition ◽  
Severe Toxicity ◽  
Sprague Dawley ◽  
Ether Anesthesia ◽  
Sprague Dawley Rats

KeponeR (decachlorooctahydro-1,3,4-metheno-2H-cyclobuta[cd]pentalen-2-one) is an insecticide effective against ants and roaches. It can cause severe toxicity in fishes, birds, rodents and man. Prominent effects include hepatic lipid deposition and hypertrophy, impairment of reproductive capacity and neurological disorders. Mitochondrial oligomycin-sensitive Mg2+-ATPase is also inhibited. The present study is a preliminary investigation of tissue ultrastructural changes accompanying physiological signs of acute toxicity, which after two days treatment include: pronounced hypersensitivity and tremor, various degrees of anorexia and adipsia, and decreased weight gain.Three different series of adult male Sprague-Dawley rats (Charles River or CD-I) were treated by intubation with Kepone in corn oil at a dose of 50 mg per kg for 3 successive days or at 200 ppm in food for 8 days. After ether anesthesia, rats were immediately perfused via a cannula in the left ventricle with 4% p-formaldehyde and 0.5% glutaraldehyde in Millonig's phosphate buffer at pH 7.2 for 20-30 min at 22°C.

Sign in / Sign up

Export Citation Format

Share Document