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
Lifestyle
Home / Lifestyle / News

Arsenic and old nails

By Zhang Zefeng | China Daily | Updated: 2018-02-07 09:01
Share
Share - WeChat
Former RISE president Kate Smith and Taiyuan University of Technology student Li Zhilin check water samples taken from Liangjiabu village in North China's Shanxi province. [Photo provided to China Daily]

Students from the Rural International Student Exchange program at Tsinghua University are helping villagers in Shanxi province purify drinking water. Zhang Zefeng reports.

Even in his childhood, Liang Honggang had the impression the water quality in his village was poor. However, he didn't fully realize how bad it was until he attended high school in the nearby city of Pingyao and had access to tap water.

"The water just tastes different," says Liang, now a 23-year-old graduate of Taiyuan University of Technology. "Back home, the water is smelly, especially during summer."

This is not that surprising since the water in the small village of Liangjiabu in Shanxi province is primarily untreated groundwater from two wells.

But aside from having the odor and sediment, the water is also contaminated with arsenic.

Last summer a team of 13 students from Rural International Student Exchange at Tsinghua University, a nonprofit organization dedicated to solving rural environmental problems in China, visited the village and tested the water.

According to the test result of the RISE team, the main well in Liangjiabu had an arsenic concentration of over 200 micrograms per liter, far exceeding the World Health Organization safety standard of 10 micrograms per liter.

Cao Yining, a 21-year-old environmental engineering major of Tsinghua University, is the current team leader. While visiting the village, she was astounded by the quality of local drinking water.

"I feel powerless as there is little we can do," she said.

The arsenic is the result of the local geological conditions, the Taiyuan and Datong basins in Shanxi have arsenic, and the area also has the natural conditions for arsenic to enter the groundwater.

Among the regions and provinces in China, 20 have water naturally contaminated with arsenic. Apart from Shanxi, certain areas among regions including the Xinjiang Uygur autonomous region, the Ningxia Hui autonomous region and Jilin province suffer from severe contamination, says Zhang Fang, assistant professor, School of Environment, Tsinghua University.

The greatest threat to public health from arsenic originates from contaminated groundwater. Long-term exposure to arsenic through drinking-water and food can lead to skin cancer, skin lesions, cardiovascular disease and diabetes, according to WHO.

1 2 3 Next   >>|
Most Popular
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: 江达县| 罗平县| 泊头市| 扶风县| 鸡泽县| 通渭县| 邹城市| 马公市| 西乌珠穆沁旗| 武汉市| 榆林市| 任丘市| 确山县| 民乐县| 乳源| 肇州县| 清远市| 石渠县| 太白县| 马龙县| 郸城县| 托里县| 龙门县| 高清| 兴安盟| 象山县| 根河市| 安溪县| 射洪县| 苗栗县| 许昌市| 黔南| 中山市| 泸西县| 洪泽县| 囊谦县| 蒙自县| 城市| 彭泽县| 诸暨市| 裕民县|