scholarly journals Inhibition of Poly(ethylenediaminetetraacetic acid-diethanolamine) on Deposition of Calcium Sulfate Crystal in Simulated Industrial Water

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 544
Author(s):  
Jian-Qiu Chen ◽  
Ting-Ran Liu ◽  
Miao-Miao Sun ◽  
Yu-Zeng Zhao ◽  
Hong-Hua Ge
Keyword(s):  
Calcium Sulfate ◽  
Ethylenediaminetetraacetic Acid ◽  
Water System ◽  
Water Soluble ◽  
Gel Chromatography ◽  
Industrial Water ◽  
Inhibition Effect ◽  
Scale Inhibition ◽  
Calcium Sulfate Scale ◽  
Sulfate Crystal

Calcium sulfate scale is a typical deposit on the equipment pieces or pipes of an industrial water system. Scale inhibitors could obviously reduce the precipitation of calcium sulfate crystal. The development and research of late-model environmentally friendly polymer inhibitors are often urgent problems to be addressed. A water-soluble poly(ethylenediaminetetraacetic acid-diethanolamine) (PEDTA-DEA) was successfully synthesized by thermal polycondensation of ethylenediaminetetraacetic acid (EDTA) with diethanolamine (DEA). The polymer product was characterized by Fourier infrared spectrum (FTIR) and the molecular weight was measured by gel chromatography, which confirms the polymerization of the two monomers. The inhibition effect of the polymer against calcium sulfate deposition was studied by static scale inhibition tests. When the Ca2+ concentration is 3000 mg/L, and the dosage of the polymer inhibitor is 10 mg/L, the inhibition effect exceeds 90%. The results show that PEDTA-DEA can inhibit the precipitation of calcium sulfate and reduce the deposition of calcium sulfate scale. The precipitate of calcium sulfate collected from the static scale inhibition test solution was analyzed by FTIR, scanning electron microscope (SEM) and X-ray diffraction (XRD). The results revealed that the addition of the polymer significantly changes the calcium sulfate crystal’s growth shape. Therefore, PEDTA-DEA is a potential calcium sulfate precipitation inhibitor for the industrial water system.

Modified pectin-based polymers as green antiscalants for calcium sulfate scale inhibition

Desalination ◽  
2012 ◽  
Vol 305 ◽  
pp. 31-37 ◽  
Author(s):  
Kalpana Chauhan ◽  
Rajeev Kumar ◽  
Muneesh Kumar ◽  
Praveen Sharma ◽  
Ghanshyam S. Chauhan
Keyword(s):  
Calcium Sulfate ◽  
Scale Inhibition ◽  
Calcium Sulfate Scale

Performance of a non-phosphorus antiscalant on inhibition of calcium-sulfate precipitation

2012 ◽  
Vol 66 (1) ◽  
pp. 193-200 ◽  
Author(s):  
Xiaoxu Xue ◽  
Change Fu ◽  
Na Li ◽  
Fangfang Zheng ◽  
Weiben Yang ◽  
...  
Keyword(s):  
Calcium Sulfate ◽  
Water Systems ◽  
Sem Analysis ◽  
Solution Ph ◽  
X Ray ◽  
Thermodynamics And Kinetics ◽  
Scale Inhibition ◽  
Calcium Sulfate Scale ◽  
Different Temperatures ◽  
Strong Ability

The aim of this study is to report on the performance of a novel non-phosphorus antiscalant, acrylic acid (AA)-allylpolyethoxy carboxylate (APEC), being developed for calcium-sulfate scale inhibition in industrial water systems. The performance of AA-APEC on calcium-sulfate scale inhibition was compared with that of the two commercial inhibitors, polyamino polyether methylene phosphonates (PAPEMP) and polyacrylic acid (PAA), containing the same polyethylene glycol segments or carboxyl functional groups as AA-APEC. The study indicated that AA-APEC could act as a highly effective calcium sulfate inhibitor, having strong ability to inhibit the precipitation of calcium sulfate at a dosage of 2 mg L−1, showing approximately 83.6% inhibition. The results also showed that AA-APEC dosage, the solution pH, inhibiting temperature, concentration of Ca2+, and SO42− all play important roles in inhibiting calcium-sulfate precipitation. The precipitation thermodynamics and kinetics at different temperatures were also discussed. X-ray diffractometer (XRD) and scanning electron microscope (SEM) analysis showed that AA-APEC strongly affected the texture and the morphology of the deposited calcium sulfate. Calcium sulfate has been inhibited through stabilization by adsorption onto crystal growth sites of nascent crystals altering their morphology.

Dynamic Simulation Test on Scale Inhibition of Secondary Effluent of Sewage Treatment Plant Directly Reused in Power Plant Circulating Cooling Water System

2013 ◽  
Vol 473 ◽  
pp. 125-128
Author(s):  
Wen Qiu ◽  
Yi Zhao
Keyword(s):  
Power Plant ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Water System ◽  
Cooling Water ◽  
Secondary Effluent ◽  
Inhibition Effect ◽  
Scale Inhibition ◽  
Circulating Cooling Water

Secondary effluent of sewage treatment plant directly reused in power plant circulating cooling water system was the main cause of scale inhibition in the system.Facing this serious scaling problem,static scale inhibition experiment was carried out to filter out the efficient compound formulation.Corrosion inhibition performance by rotary coupon experiment was studied.Scale and corrosion inhibition effect under the field condition by homemade dynamic simulation experiment and the environment toxicity were tested. The result showed that this water treatment agent gain the high scale and corrosion inhibition effect, with low phosphorus,non-toxic,friendly to environment.

Novel and green hydroxyperylene imide based fluorescent polymer for calcium sulfate scale inhibition

2021 ◽  
pp. 117730
Author(s):  
Li Li ◽  
Ying Wang ◽  
Yue Sun ◽  
Wenzhong Yang ◽  
Xiaoshuang Yin ◽  
...  
Keyword(s):  
Calcium Sulfate ◽  
Scale Inhibition ◽  
Calcium Sulfate Scale ◽  
Fluorescent Polymer

scholarly journals Preparation of carboxymethyl-quaternized oligochitosan and its scale inhibition and antibacterial activity

2013 ◽  
Vol 4 (2) ◽  
pp. 65-75 ◽  
Author(s):  
Hui-xin Zhang ◽  
Dong-xue Sun ◽  
Yu-chao Zhu ◽  
Ting-ru Yang ◽  
Xiu-hong Jin ◽  
...  
Keyword(s):  
Calcium Sulfate ◽  
Oxygen Demand ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Static Test ◽  
X Ray ◽  
Microbial Inhibition ◽  
Scale Inhibition ◽  
Calcium Sulfate Scale ◽  
Ft Ir

Carboxymethyl-quaternized oligochitosan (CMQAOC) was prepared through carboxymethylization and N-quaternization of oligochitosan (OC) which was obtained from chitosan degradation. The structure was confirmed by Fourier transform infrared spectroscopy (FT-IR), 1H-NMR, and X-ray diffraction (XRD) analysis. The performances for both scale and microbial inhibition of CMQAOC were evaluated by static test and culture flask method, respectively. The results showed that the scale inhibition rate for calcium carbonate and calcium sulfate scale were both beyond 80% with a CMQAOC dosage of 20 mg/L. With a degree of substitution for quaternary ammonia of up to 0.74, the killing rate for saprophytic bacteria and sulfate-reducting bacteria was 98.9 and 100%, respectively. The ratio of biochemical oxygen demand/chemical oxygen demand (BOD5/COD) of CMQAOC was 0.45, showing that CMQAOC is as biodegradable as OC.

The Experimental Study on the Inhibition Effect of Fusarium oxyspomm with Bio-Slurry Based on Material Properties

2013 ◽  
Vol 675 ◽  
pp. 317-321
Author(s):  
Meng Ying Fang ◽  
Li Chun Liu ◽  
Fang Yin ◽  
Wu Di Zhang ◽  
Shi Qing Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Material Properties ◽  
Water Soluble ◽  
Inhibition Mechanism ◽  
Main Subject ◽  
Soluble Substance ◽  
Inhibition Effect ◽  
Water Soluble Substance ◽  
Main Component ◽  
Better Than

Using petroleum ether to extract the fermentative fluid (bio-slurry), then to get the inhibition mechanism of it, and infer which is the main component in inhibition mechanism of biogas. The conclusion found by the experiment is that fat soluble substance is better than water soluble substance in inhibition mechanism, and fat soluble substance is close to 75% biogas fermentation fluid, while water soluble substance is worst. That is to say, the main subject in inhibition mechanism is hided in the fat soluble substance.

scholarly journals Water intake of pigs consuming tiamulin during the nursery phase1

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Kimberly A Vonnahme ◽  
Adam Mueller ◽  
Daniel A Nelson ◽  
Manuel Alexander Vasquez-Hidalgo ◽  
Deborah Amodie ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Intake ◽  
Feed Intake ◽  
Animal Health ◽  
Average Daily Gain ◽  
Water System ◽  
Water Soluble ◽  
Daily Water Intake ◽  
Original Product ◽  
Effect Of Treatment

Abstract Mass medication to manage population health can be achieved by providing therapeutics in the drinking water. Young nursery pigs are highly sensitive to the flavor and smell of water. Medications that reduce water palatability often lead to an interruption in water and feed intake. With the availability of several generic water-soluble antimicrobials for pigs, questions have arisen about their palatability compared with the original product. In this study, we compared the intake of water containing tiamulin hydrogen fumarate from two different manufacturers with the intake of unmedicated water. The hypothesis was that the intake of tiamulin-containing water would be similar to unmedicated water. Water intake was monitored upon entry into the nursery and just prior to leaving the nursery. Also, average daily gain (ADG) and feed efficiency (FE) were determined. A total of 300 pigs were individually weighed (4.2–10.9 kg; avg = 6.8 kg) for randomization to pen (n = 30 pens). The experiment had two time points: 1) early nursery (periods 1–3) and 2) late nursery (period 4). Pens were randomly assigned to a sequence (period 1–3) in a crossover experimental design containing three 10-d periods, with 5 d for the resetting of baseline where unmedicated water was provided followed by 5 d on tiamulin source addition [i.e., TriamuloxTM (Zoetis, Parsippany, NJ); Denagard (Elanco Animal Health, Greenfield, IN)] or unmedicated water. After period 3 was concluded, all pens were given unmedicated water (via nipple waterers) and the number of pigs per pen was reduced to six pigs to maintain adequate space per pig. Ten days prior to pigs leaving the nursery, a fourth period was performed. After a 5-d water baseline was achieved, pens were treated with either unmedicated water or Triamulox- or Denagard-containing water. Pigs had ad libitum access to water and feed. During the testing periods, daily water intake was measured by a cup water system in each pen. Feed intake was measured every 5 d. There was no effect of treatment on initial body weights or weights at the beginning or end of each period (P ≥ 0.51). Therefore, there was no effect of treatment on ADG (P ≥ 0.23). Water intake (P ≥ 0.16) and FE (P ≥ 0.35) were not affected by treatment. Water consumption was similar among all treatments in each of the four periods. There appears to be no aversion to water intake when tiamulin hydrogen fumarate is added to the drinking water.

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