首頁最新消息簡介攝影畫廊讀經日引網上資源網上下載網上討論區聯絡我們
聖經金句

既有人的樣子,就自己卑微,存心順服,以至於死,且死在十字架上。
腓立比書2:8



 
聖經查詢
聖經查詢(新版)
關於我們
目錄導覽
音樂詩歌點播
文化天地
時事論壇
世界經濟
育博通
珠璣集
幽默
News
教育中心
時代論壇报
山行文化出版社
文藝園地
健康資訊
中美友好協會
美國新聞 ( 国际日报 报道)
南粵之窗
Amazing Qingdao
Panda Mania
教會機構專欄精選
網上奉獻與支持
故障申告
聯絡我們
網站維護

設為首頁
加入「我的最愛」
瀏覽流量統計
人數: 1,837,507 
頁數: 33,445,320 
下載: 12,154 
Since 11/2005


訂閱電子報

訂閱電子週報
自訂閱名單移除
電郵Email:



  
   

Bookmark and Share   
 
China Focus: "Magic soil" a green solution to red tide
1/10/2020


QINGDAO, Jan. 10 (Xinhua) -- A "magic soil" made out of modified clays has been proved effective in fighting red tide along China's coastal waters and introduced to other countries like Chile, the United States and Peru.

The "magic soil" won second prize of China's State Technological Invention Award that was presented Friday in Beijing for its breakthrough in eliminating the threat of red tide, a harmful algal bloom (HAB) causing damage to marine aquaculture.

The modified clays are sprayed onto the red tide using a special apparatus aboard vessels, and can take the majority of algae down to the seabed through flocculation and inhibit the growth of residual algae, said Yu Zhiming, chief scientist for the "magical soil" program at the Institute of Oceanology of the Chinese Academy of Science (IOCAS).

Yu's team has developed and upgraded the technology since 1993. The synthetic material was first applied in Xuanwu Lake in Nanjing, capital of eastern China's Jiangsu Province in 2005, to mitigate harmful algae bloom.

In August 2008, a massive red tide hit 86 km of seashore near the Olympic Sailing Center of Qingdao, threatening the sailing events of the Beijing Olympic Games.

About 320 tonnes of the modified clays were continuously dispersed into the water within 30 hours, and the water quality was restored the day after. The threat to the sailing events was eliminated.

In 2014, the technology was included as a standard method in the "Technical Guidelines for the Treatment of Red Tide Disaster" in China. Currently, it is the only large-scale field application method available to mitigate algae bloom in the country.

Yu said by changing the surface charges of clay particles from negative to positive, the modification can increase attractive interaction between clay particles and algae cells, incurring flocculation.

"A total of 4 to 10 grams of modified clay per square meter is needed to eliminate algae, which doesn't harm the ocean," said Yuan Yongquan, a member of Yu's team.

Laboratory investigations revealed that the reaction between modified clays and algae can generate a large number of reactive oxygen species (ROS), which are widely used in sterilization, also effective in curbing algae growth and proliferation.

Production of modified clays has been industrialized in China, and raw materials of the modified clays are common, like those used for producing ceramic or for construction.

TEST WATERS ABROAD

The material made its first overseas application in 2018 in Chile, where red tide caused economic losses of 1 billion U.S. dollars to the aquaculture industry between the end of 2015 and early 2016.

"Chile sprayed more than 30 tonnes of the modified clays in summer of 2018, and the harmful algae blooms were extinguished effectively," said Yu, adding that Chile has decided to import more modified clays and apply them nationwide.

Also troubled with red tide, Florida tried China's modified clays in 10,000 square km and invited a third-party to do an evaluation in 2018.

About 30 scientists from the Woods Hole Oceanographic Institution of the United States and other institutes concluded: "Results to date are generally consistent with published studies from China (reviewed by Yu et al, 2017) which support the view that clay dispersal can be effective without significant adverse environmental impacts."

Thus, Florida passed a bill to import 2.4 million dollars worth of modified clays from China.

"The HAB control team at the IOCAS has been a world leader in the development and application of this promising technology," said Donald Anderson, director of the U.S. National Office for Harmful Algal Blooms.

In November last year, Peru also signed a contract with IOCAS to use the modified clays to protect scallops from red tide, according to Yu.

 

 


相關訊息

Body temperature checked before entering subway in Qingdao 
 

Construction of China's longest undersea subway tunnel completed 
 

Qingdao High-tech Zone holds to-be-list enterprise symposium 
 

Qingdao High-tech Zone and Chengyang District complete handover of employment works 
 

Ivory products seized in east China port city 
 

Construction of China's longest undersea subway tunnel completed 
 

Shandong supports Jinan, Qingdao building national central city 
 

Xiaonian Festival marked across China 
 

Cultural event held in Qingdao to greet Spring Festival 
 

Qingdao High-tech Zone innovates to promote investment 
 

East China customs seizes ivory products in painting scrolls 
 

Chairman of WFEO visits Qingdao High-tech Zone 
 

CBA Roundup: Beijing Royal Fighters edge Shenzhen, Beijing Ducks lose to Qingdao 
 

Qingdao beats powerhouse Beijing to grab third straight victory in CBA 
 

Various cultural activities held in Qingdao for upcoming Spring Festival 
 

本目錄中最多閱覽的文章

China’s navy to temporarily seal off part of Yellow Sea from Qingdao to Lianyungang 


Video - This is Qingdao 


Axalta Wins Best Partner Award from FAW-Volkswagen Qingdao 


左岸潇在加州州立大學主講“中國當代時尚設計潮流和趨勢” 


舌尖上的市井記憶--青島母茶園的前世今生成品 


   Email: sino.american2020@gmail.com    Powered by Web4Jesus (W4J) Ministry