久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

US EUROPE AFRICA ASIA 中文
Business / News

Scientists find ways to clean polluted soil

(Xinhua) Updated: 2012-05-31 14:57

BEIJING - There are ways to clean heavy-metal-polluted soil, according scientists that attended a two-day forum in Beijing that ended Thursday.

A total of 300 soil scientists and ecology experts attended the 2012 Forum on Heavy Metal Soil Remediation and Ecological Restoration.

Chen Tongbin, researcher with Institute of Geographic Sciences and Natural Resources research under Chinese Academy of Sciences told Xinhua, "Heavy metals, different from organic pollutants, are non-biodegradable and can't be separated from the polluted soil."

"They can cause serious pollution to farmland and drinking water."

Chen's team is running a project to clean polluted soil in Guangxi Zhuang autonomous region by using the Chinese fern, Pteris vittata L that has a strong capacity to extract arsenic from the soil.

They also cultivated a dozen more pollution-extracting plants, called "hyper-accumulators" that can ensure "soil recovery with lower costs and lower risks of secondary pollution," said Chen.

By inter-cropping with sugarcane and mulberry, Chen said his solution could bring a certain degree of profits for farmers.

Researchers from South China University of Technology have found new applications for maize straw aside from using it to make biomass energy.

"Agricultural castoff, like stalks, have many pores. It can be used to effectively absorb soil cadmium after modification," said Yang Chen, associate professor of environment sciences.

However, Wang Qi, a solid waste specialist from China Research Academy of Environmental Sciences, said the heavy metal cleansing was a systematic project, requiring a combination of technologies covering all industry process.

"A single technology can be promising, but the after-treatment is always neglected by enterprises. The material absorbed with heavy metals tend to be simply buried, causing some potential risks," said Wang.

Chen's brake fern project has taken heavy metals recovery into account. "The fern reaped are to be incinerated to solidify the arsenic that can be recycled into industrial materials," Chen said.

China's 12th Five-Year Plan on environmental protection has urged efforts to carry out the cleansing of heavy-metal-polluted soil.

"The growing public awareness and the national policy over heavy metals could also bring a considerable market potential in soil repair," Chen said.

Hot Topics

Editor's Picks
...
主站蜘蛛池模板: 亚洲欧美一区二区三区久久 | 国产成人高清视频在线观看免费97 | 又粗又爽又色男女乱淫播放男女 | 在线 中文字幕 日韩 欧美 | 色悠久久久久综合网伊人男男 | 成人综合影院 | 欧美日韩一日韩一线不卡 | 亚洲高清在线观看播放 | 国产精品爱久久久久久久三级 | 久久久久久久99视频 | 一级女人毛片 | 精品国产一区二区三区久久 | 美女扒开腿被男人猛视频 | 国产三级在线 | 亚洲精品综合一区二区三区 | 亚洲天堂美女 | 欧美成人全部免费观看1314色 | 亚洲成a人v大片在线观看 | 久草在线最新视频 | 99热在线免费 | 国产一区中文字幕在线观看 | 欧美日韩一区在线观看 | 成人亚洲欧美综合 | 国产亚洲一区呦系列 | 国产亚洲欧美另类久久久 | 91精品国产一区二区三区左线 | 永久免费观看午夜视频在线 | 欧美笫一页 | 国产日韩精品一区二区三区 | 一区二区三区免费在线观看 | 亚洲视频三区 | 男人的天堂亚洲 | 亚洲成人美女 | 综合国产 | 免费一区二区三区视频狠狠 | 久久久久久综合对白国产 | 中文字幕在线播放视频 | 国产短裙黑色丝袜在线观看下 | 亚洲人成网站色7799在线观看 | 京野结衣免费一区二区 | 高清在线亚洲精品国产二区 |