男友太凶猛1v1高h,大地资源在线资源免费观看 ,人妻少妇精品视频二区,极度sm残忍bdsm变态

Global EditionASIA 中文雙語Fran?ais
China
Home / China / Innovation

Chinese scientists use rice straw to desalinate seawater

Xinhua | Updated: 2019-04-18 21:17
Share
Share - WeChat

BEIJING -- Chinese scientists have developed an innovative desalination technology that uses rice straw and sunlight for clean water production.

Solar steam generation is considered a promising strategy for purification of wastewater and seawater. Scientists from the Ningbo Institute of Materials Technology and Engineering have developed a solar steam-generation device from wasted rice straw.

The device is composed of a photothermal membrane and water pumps. Rice straw leaves are carbonized and composited with bacterial cellulose to function as a photothermal membrane and the lower culms of straw are designed as water pumps.

The solar rice straw-derived desalination achieves a daily clean water yield of 6.4 to 7.9 kg per square meter on sunny days and 4.6 to 5.6 kg on cloudy days. The water yielded reached safe drinking water standards with over 99.9 percent of saline ions removed.

Besides seawater desalination, the device can also be used for extracting clean water from various water-bearing areas such as tidal flats, wetlands and marshes.

The research was published in the journal ACS Applied Materials and Interfaces.

As fresh water scarcity is one of the most compelling global concerns, scientists are exploring innovative desalination technologies to increase water productivity and bring down the overall desalination cost.

According to Liu Fu, the leading researcher, there is a great need to reduce energy consumption in desalination technology and solar-driven steam generation has attracted wide attention.

"As green and inexhaustible energy, solar energy can be harnessed in desalination and water purification, leading to low-cost and sustainable technologies that address the water crisis worldwide," Liu said.

To utilize solar energy, solar thermal materials are needed. Since it is complex and costly to prepare traditional solar thermal materials such as plasmonic materials, carbon nanotubes and graphene-based materials, they are not suitable for large-scale applications.

Liu's team explores new materials and new engineering designs to improve the efficiency of solar thermal conversion and reduce the cost of desalination.

Stepping out of the lab, learning from nature, he found rice straw was the most suitable candidate for photothermal desalination, as it possesses a high transpiration coefficient and a superior water delivery capability through its culms.

China has an abundance of rice straw. Chinese farmers traditionally burn straw after harvest, which causes air pollution and has been banned in many places.

"If this agricultural waste can be used for extracting clean water, it will be an environmentally friendly and sustainable technology," Liu said.

The technique can be used in remote islands or mountainous regions lacking water. It can be used during emergencies such as floods, earthquakes and severe environments such as in the wilderness for obtaining clean water, according to the team.

Liu's team is also researching other solar thermal materials, which are expected to be commercialized in large-scale desalination projects in three years.

An expert in solar-thermal desalination, Professor Zhu Jia from Nanjing University said the research was a new and creative exploration in using solar energy to desalinate sea water.

"By using rice straw as solar thermal materials, the cost for desalination can be further reduced," Zhu said.

Top
BACK TO THE TOP
English
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 焉耆| 二连浩特市| 衡水市| 昆明市| 瓮安县| 镇康县| 克东县| 蒲城县| 赞皇县| 安泽县| 会泽县| 边坝县| 延吉市| 潜江市| 赫章县| 库尔勒市| 大方县| 瑞金市| 枣庄市| 永城市| 永福县| 淄博市| 曲阜市| 延川县| 收藏| 许昌市| 宁都县| 乐清市| 铜梁县| 新和县| 凌云县| 镇沅| 积石山| 东丽区| 迁西县| 西贡区| 儋州市| 竹溪县| 承德市| 三台县| 确山县|