scholarly journals Focused beam reflectance measurement as a tool for in situ monitoring of the lactose crystallization process

2016 ◽  
Vol 99 (7) ◽  
pp. 5244-5253 ◽  
Author(s):  
K. Pandalaneni ◽  
J.K. Amamcharla
Keyword(s):  
Crystallization Process ◽  
In Situ Monitoring ◽  
Reflectance Measurement ◽  
Focused Beam

In-situ and real-time aggregation size evolution of copper sulfide precipitates using focused beam reflectance measurement (FBRM)

2021 ◽  
Vol 380 ◽  
pp. 205-218
Author(s):  
Lorena Barros ◽  
Minghai Gim-Krumm ◽  
Gabriel Seriche ◽  
Michelle Quilaqueo ◽  
Claudia Castillo ◽  
...  
Keyword(s):  
Real Time ◽  
Copper Sulfide ◽  
Reflectance Measurement ◽  
Time Aggregation ◽  
Size Evolution ◽  
Aggregation Size ◽  
Focused Beam

scholarly journals Lime/Sodium Carbonate Treated Seawater to Improve Flocculation and Sedimentation of Clay-Based Tailings

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4108
Author(s):  
Francisco Pulgar ◽  
Luis Ayala ◽  
Matías Jeldres ◽  
Pedro Robles ◽  
Pedro G. Toledo ◽  
...  
Keyword(s):  
Sodium Carbonate ◽  
Structural Changes ◽  
Water Cycle ◽  
Water Recovery ◽  
Reflectance Measurement ◽  
Vacuum Filtration ◽  
Calcium Complexes ◽  
Focused Beam ◽  
Flocculation Time

Seawater treated with lime and sodium carbonate in different proportions to reduce magnesium and calcium contents is used in flocculation and sedimentation tests of artificial quartz and kaolin tailings. Solid complexes were separated from water by vacuum filtration, and factors such as lime/sodium carbonate ratio, kaolin content, flocculation time, and flocculant dose are evaluated. The growth of the aggregates was captured in situ by a focused beam reflectance measurement (FBRM) probe. Solid magnesium and calcium complexes are formed in raw seawater at pH 11, impairing the performance of flocculant polymers based on polyacrylamides. The results show that the settling rate improved when the treatment’s lime/sodium carbonate ratio increased. That is, when a greater removal of magnesium is prioritized over calcium. The amount of magnesium required to be removed depends on the mineralogy of the system: more clay will require more significant removal of magnesium. These results respond to the structural changes of the flocs, achieving that the more magnesium is removed, the greater the size and density of the aggregates. In contrast, calcium removal does not significantly influence flocculant performance. The study suggests the necessary conditions for each type of tailing to maximize water recovery, contributing to the effective closure of the water cycle in processes that use seawater with magnesium control.

scholarly journals In situ monitoring of the charge carrier dynamics of CH3NH3PbI3 perovskite crystallization process

2019 ◽  
Vol 7 (39) ◽  
pp. 12170-12179 ◽  
Author(s):  
Efthymis Serpetzoglou ◽  
Ioannis Konidakis ◽  
Temur Maksudov ◽  
Apostolos Panagiotopoulos ◽  
Emmanuel Kymakis ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Crystallization Process ◽  
Carrier Dynamics ◽  
In Situ Monitoring ◽  
Charge Carrier Dynamics ◽  
Recombination Processes ◽  
Charge Extraction ◽  
Scientific Attention

Although CH3NH3PbI3 perovskite has attracted enormous scientific attention over the last decade or so, important information on the charge extraction dynamics and recombination processes in perovskite devices is still missing.

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