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 by Staff Writers Hefei, China (SPX) Sep 29, 2021
A team led by Prof. WU Zhengyan from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences (CAS) recently fabricated novel functional biochar composites (FBCs) using two solid waste-red mud and corn straw, and they exploited them in acidic dye wastewater treatment. Relevant result was published in Journal of Cleaner Production. Red mud is a bauxite residue generated from the Bayer process in the aluminum industry. More than two billion metric tons of red mud was piled up at random globally, causing waste of land resources and severe environmental pollution. Corn straw is an ordinary agricultural solid waste with more than 200 million metric tons generated annually in China. The exploitation of solid waste is the best way to dispose of it. In recent years, many methods have been developed to utilize red mud or corn straw, but those methods are not widely promoted and used. Therefore, it is necessary to create a novel method to reuse red mud and corn straw. In this work, FBCs were fabricated by the co-pyrolysis of red mud and corn straw and exploited in acidic dye wastewater treatment. According to the researchers, the FBCs showed excellent neutralization performance due to containing alkaline substances (mainly calcium oxide CaO) and adsorption capacity on acidic dyes due to its high surface area. Moreover, FBCs could be collected by magnet because it contains zero-valent iron. This work provides an efficient approach to reuse waste and a novel technology for acidic dye wastewater treatment.
Research Report: "Functional biochar fabricated from waste red mud and corn straw in China for acidic dye wastewater treatment"
Syria water crisis spurs spike in disease: MSF Beirut (AFP) Sept 28, 2021 Limited access to clean water in northern Syria is causing a rise in illnesses and undermining the battle against Covid-19, Doctors Without Borders (MSF) said Tuesday. The medical aid group blamed the "acute water crisis" in recent months on a decrease in funding for water, sanitation and hygiene operations as well as the destruction of water and sanitation infrastructure during a decade of civil war. "We are regularly confronted with the health impact of poor water quality, which often brings ... read more
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