After mixing and stirring a pale yellow bottle of liquid with sewage polluted by heavy metal ions in equal proportions and then preserving the mixture at room temperature for 30 minutes, the water gradually changes its color. Heavy metal ions separate from the solution as deposits.

This pale yellow liquid is a new generation of green biological adsorbent, commonly known as “Adsorption Treasure.” It was researched and developed by WANG Pan, a graduate student of the Environmental Science and Engineering College of Tongji University.

Different concentrations of Adsorption Treasure present different shades of yellow. In addition to the liquid Adsorption Treasure, there is also a light yellow powdered Adsorption Treasure. Adsorption Treasure purifies sewage. Recently, by means of a related technology and business model of turning sludge into wealth, the "Shanghai Green-ID Sludge Technology Co., LTD" Project lead by WANG won the gold medal in the 2014 "Chuang Qingchun" National Entrepreneurship Competition for College Students.

Translated by May Language Studio based upon

http://news.tongji.edu.cn/classid-12-newsid-45652-t-show.html