scholarly journals Functionalized natural cellulose fibres for the recovery of uranium from seawater

RSC Advances ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 6654-6657
Author(s):  
Adrian Tellería-Narvaez ◽  
Whitney Talavera-Ramos ◽  
Lucas Dos Santos ◽  
Jimena Arias ◽  
Alejandro Kinbaum ◽  
...  
Keyword(s):  
High Efficiency ◽  
Sea Water ◽  
Cellulose Fibres ◽  
Natural Cellulose ◽  
Uranium From Seawater

Simple organophosphonate functionalization of sisal fibres yields materials that extract uranium from sea water with high efficiency.

Simulation on Linear-Motor-Driven Water Hydraulic Reciprocating Plunger Pump

2013 ◽  
Vol 842 ◽  
pp. 530-535 ◽  
Author(s):  
Zeng Meng Zhang ◽  
Yong Jun Gong ◽  
Jiao Yi Hou ◽  
Han Peng Wu
Keyword(s):  
Flow Rate ◽  
Deep Sea ◽  
High Efficiency ◽  
Control Method ◽  
Sea Water ◽  
Linear Motor ◽  
Low Flow ◽  
Flow Pulsation ◽  
Plunger Pump ◽  
Water Hydraulic

The water hydraulic reciprocating plunger pump driven by linear motor is suitable to deep sea application with high efficiency and variable control. Aiming to study the principle structure and working characteristics of the pump, two patterns of valve and piston distribution were designed. And the control method and the performance were analyzed by simulation based on the AMESim model. The results show that the pressure and flow pulsation of piston type pump are much smaller than the valve type, even though the piston type is large in scale and works at low flow rate. Compared with a valve distribution tri-linear-motor reciprocating plunger pump (VDTLMP), as the flow rate of the piston distribution double linear motor reciprocating plunger pump (PDDLMP) is decreased from 36.7 L/min to 21.2 L/min theoretically, the pressure pulsation amplitude is decreased from 46% to 2%, and the flow pulsation rate is also decreased from 0.266 to 0.007. These results contribute to the research on deep-sea water hydraulic power pack and direct drive pump with high efficiency and energy conservation.

scholarly journals Characteristics of Natural Cellulose Fibres Extracted from Sri Lankan Rice Straw Varieties

2020 ◽  
Vol 31 (3) ◽  
pp. 72
Author(s):  
A. Ratnakumar ◽  
A. M. P. B. Samarasekara ◽  
D. A. S. Amarasinghe ◽  
L. Karunanayake
Keyword(s):  
Rice Straw ◽  
Sri Lankan ◽  
Cellulose Fibres ◽  
Natural Cellulose

scholarly journals Design and Experiment of Reverse Osmosis Seawater Desalination Unit for Water Supply System of Heat Recovery Boiler of Steam Injection Gas Turbine (STIG) Plant

1997 ◽  
Author(s):  
Niu Limin ◽  
Zheng Qun
Keyword(s):  
Power Plant ◽  
Reverse Osmosis ◽  
Heat Recovery ◽  
High Efficiency ◽  
Sea Water ◽  
Steam Injection ◽  
Water Desalination ◽  
Heat Recovery Boiler ◽  
Fine Filter ◽  
Recovery Boiler

STIG power plant is a competitive choice for commercial use because of its inherent characteristics and high efficiency. But if it was to be a marine propulsive engine, a fresh water supplying system should be provided for the heat recovery boiler. A two stage experimental reverse osmosis (RO) sea water desalination system which consist of an RO membrane and fine filter and super fine filter etc. is established. The experiments on the system and measurements of the desalination water quality indicate that the RO desalination system is suitable for marine STIG power plant. Some design and experimental problems and experimental results are presented and discussed in this paper.

scholarly journals Graphene and related 2D materials for desalination : A review of recent patents

2020 ◽  
Author(s):  
Amall Ramanathan ◽  
Maha Aqra
Keyword(s):  
Energy Demand ◽  
High Efficiency ◽  
Sea Water ◽  
2D Materials ◽  
Water Desalination ◽  
Low Energy ◽  
Theoretical Studies ◽  
Great Progress ◽  
Experimental And Theoretical Studies ◽  
Growing Population

<p></p><p>The growing population and energy demand, coupled with the depleting fresh water resources has resulted in great progress in sea water desalination (SWD) technologies. Nanopores of 2D materials like graphene and its structural analogs are the latest innovations in membrane technology for SWD. The performance of these novel atomically thin nanopores as seen from various experimental and theoretical studies is highly encouraging with reports of water permeability 2-3 orders of magnitude greater than the conventional reverse osmosis (RO). The potential for high efficiency and the low energy requirements of these nanopores for desalination has led to tremendous efforts in fabrication and commercialization. We present here a review of the very recent patents associated with the preparation of these nanopores, the process and the efficiency of SWD. </p><br><p></p>

Shunt-Excited Sea-Water Monopole Antenna of High Efficiency

2015 ◽  
Vol 63 (11) ◽  
pp. 5185-5190 ◽  
Author(s):  
Changzhou Hua ◽  
Zhongxiang Shen
Keyword(s):  
High Efficiency ◽  
Sea Water ◽  
Monopole Antenna

Highly porous carbon from a natural cellulose fiber as high efficiency sorbent for lead in waste water

2017 ◽  
Vol 245 ◽  
pp. 296-299 ◽  
Author(s):  
Manikandan Ilangovan ◽  
Vijaykumar Guna ◽  
Sharon Olivera ◽  
Ashwini Ravi ◽  
H.B. Muralidhara ◽  
...  
Keyword(s):  
Waste Water ◽  
Porous Carbon ◽  
High Efficiency ◽  
Cellulose Fiber ◽  
Natural Cellulose ◽  
Highly Porous

Determination of Chlorophyll a and Pheophytin a Concentrations in Acetone Extracts by Laser Fluorometry

1995 ◽  
Vol 49 (2) ◽  
pp. 200-206 ◽  
Author(s):  
Andrey A. Demidov ◽  
Evgenii V. Baulin
Keyword(s):  
Chlorophyll A ◽  
High Efficiency ◽  
Sea Water ◽  
Second Harmonic ◽  
World Ocean ◽  
Internal Standard ◽  
Raman Signal ◽  
Pheophytin A ◽  
Acetone Water ◽  
Favorable Conditions

We have used the technique of laser fluorometry for chlorophyll a and pheophytin a measurements in 90% acetone/water extracts of sea-water phytoplankton. In our method, the acetone Raman signal is used as an internal standard. We have shown that use of the second harmonic of a pulsed Nd:YAG laser (λ = 532 nm) makes it possible to measure pigment concentrations as low as 10 ng/L. It creates favorable conditions for high-efficiency analysis of the phytoplankton pigments in the oligotrophic areas of the world ocean and for investigations of the feed process of individual zooplankton samples.

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