Effect of water chemistry on calcium carbonate deposition on metal and polymer surfaces

Wu, Zhengfang; Davidson, Jane H.; Francis, Lorraine F.

doi:10.1016/j.jcis.2009.11.031

Cited by 49 publications

(29 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in accordance with the finding of a previous study has shown that veterite was formed in the initial phase supersaturated CaCO 3 solution, and it could be transformed to calcite in the absence of scale inhibitors [14]. Phase calcite is the phase that is stable while phase veterite is the phase that metastable, most likely between phases vaterite the transformation into calcite [16].…”

Section: Characterisation Of the Crystal Scalesupporting

confidence: 93%

Crystallization of calcium carbonate (CaCO3) in a flowing system: Influence of Cu2+ additives on induction time and crystalline phase transformation

Usmany¹,

Putranto²,

Bayuseno³

et al. 2016

AIP Conference Proceedings

View full text Add to dashboard Cite

The Raman spectrum of CaCO 3 polymorphs calcite and aragonite: A combined experimental and computational study The Journal of Chemical Physics 140, 164509 (2014) Abstract. Scaling of calcium carbonate (CaCO 3 ) is commonly found in piping systems in oil, gas, desalination and other chemical processes. The scale may create technical problems, leading to the reduction of heat transfer, increase of energy consumption and unscheduled equipment shutdown. This paper presents crystallization scaling experiments and evaluation of the effect of Cu 2+ additives on the induction time and calcium carbonate transformation. The crystals precursors were prepared using equimolar of CaCl 2 and Na 2 CO 3 resulted in concentrations of 3000 ppm Ca 2+ in the solution. The Cu 2+ in amounts of 0, 1 and 10 ppm was separately added in the solution. The flow rates (20, 35, and 60 mL/min) and elevated temperatures (27, 35 and 45 0 C) were selected in the study. The induction time for crystallization of CaCO 3 was observed by measuring the solution conductivity over time, while the phase transformation of calcium carbonate was examined by XRD method and SEM/EDX. It was found that the conductivity remained steady for a certain period reflecting to the induction time of crystal formation, and then decreased sharply afterwards,. The induction time was increased from 34 and 48 minutes in the presence of Cu additives (1 and 10 ppm), depending on the flow rates and temperature observed. In all the experiments, the Cu 2+ addition leads to the reduction of mass of crystals. Apparently, the presence of Cu 2+ could inhibit the CaCO 3 crystallization. In the absence of Cu 2+ and at elevated temperature, the crystals obtained were a mixture of vaterite and calcite. In the presence of Cu 2+ and at elevated temperature, the crystals formed were aragonite and calcite. Here, the presence of Cu 2+ additives might have controlled the crystal transformation of CaCO 3 .

show abstract

Section: Characterisation Of the Crystal Scalesupporting

confidence: 93%

Crystallization of calcium carbonate (CaCO3) in a flowing system: Influence of Cu2+ additives on induction time and crystalline phase transformation

Usmany¹,

Putranto²,

Bayuseno³

et al. 2016

AIP Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…As can be seen in the inset to Fig. 1d, a layer of CaCO 3 particles was formed on the cell wall of the cellulose aerogel, while the presence of cubicalshaped CaCO 3 can also be observed, being a characteristic shape of calcite (Flaten et al 2010;Wu et al 2010;Hwang et al 2014). Meanwhile, the XRD pattern obtained for both Gel-0 and Gel-CaCO 3 is shown in Fig.…”

Section: Resultsmentioning

confidence: 81%

CaCO3-decorated cellulose aerogel for removal of Congo Red from aqueous solution

et al. 2015

View full text Add to dashboard Cite

The present study describes the preparation of CaCO 3 -loaded cellulose aerogel and evaluation of its adsorptive removal of Congo Red (CR) from aqueous solution. The CaCO 3 -cellulose aerogel was produced via in situ precipitation of CaCO 3 into asprepared cellulose aerogel, which was prepared by freeze-drying a crosslinked cellulose solution that was dissolved using a NaOH/urea solution. The particles that formed in the aerogel were confirmed to be calcite CaCO 3 . Adsorption studies illustrated that the CR uptake by the aerogel was dependent on the dye concentration and temperature. Incorporation of CaCO 3 into the cellulose aerogel significantly enhanced the adsorption capacity of the aerogel toward CR. The maximum adsorption capacity of the CaCO 3 -cellulose aerogel was approximately 75.81 mg/g.

show abstract

“…Crystallization occurs due to the lateral growth of the scale deposit on the membrane surface, resulting in flux decline and surface blockage (Zhang, 2002). Thus,the scaling formation is actually the crystallization phenomenon.Bulk crystallization arises when crystal particles are formed in the bulk phase through homogeneus crystallization and my deposit on membrane surfaces as sediments/particles to form a cake layer that leads to flux decline (Zhen et al, 2010). In addition, supersaturated scale forming conditions leads to scale growth and agglomeration (Rabizadeh et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Calcium Carbonate Scale Formation in Copper Pipes on Laminar Flow

Raharjo

Bayuseno

Muryanto

2016

MATEC Web of Conferences

View full text Add to dashboard Cite

Calcium carbonate is commonly precipitated as a scale in the transportation pipes of water. The presence of this mineral deposit becomes problematic, because it can block the pipes and lead to a decline in piping performance. Calcium carbonate precipitation from the synthetic solution was experimentally investigated in the present study. The aim of research was to predict the occurrence of precipitates and characterize the scale precipitated from the solutions. The synthetic solutions were prepared using CaCl2 and Na2CO3, which was mixed with distilled water (H2O). The concentrations of Ca 2+ at 2000, 3000, 4000 and 5000 ppm. in the solution were adjusted and the solution flow in the Cu pipes at the different flow rate of 30, 40 and 50 ml/min. It was found that in all the experiments, the conductivity decreased abruptly after a certain induction period. Higher temperature produced more mass of the scale indicating that the increasing temperature promote scale formation. SEM analysis showed that the scale was rhombohedral, while EDS revealed that the elemental composition of the scale consisted of Ca, C and O. The crystalinity of the scale was found to be mostly calcit as shown by the XRD

show abstract

Effect of water chemistry on calcium carbonate deposition on metal and polymer surfaces

Cited by 49 publications

References 38 publications

Crystallization of calcium carbonate (CaCO3) in a flowing system: Influence of Cu2+ additives on induction time and crystalline phase transformation

Crystallization of calcium carbonate (CaCO3) in a flowing system: Influence of Cu2+ additives on induction time and crystalline phase transformation

CaCO3-decorated cellulose aerogel for removal of Congo Red from aqueous solution

Calcium Carbonate Scale Formation in Copper Pipes on Laminar Flow

Contact Info

Product

Resources

About