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Oil and gas wastewater as dust suppressant less than ideal

At the least, wastewater from oil and gas drilling should be treated in a waste treatment facility before it is used on dirt roads to suppress dust or deice roads. At the best, affordable, nontoxic dust suppressants should be developed and used, according to a multidisciplinary team of researchers. “Thirteen states in the United States have regulations that allow oil and gas wastewaters to be spread on roads for deicing or dust suppression,” the researchers report today in Environmental Science &…

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Cementless fly ash binder makes concrete ‘green’

Engineers use byproduct from coal-fired power plants to replace Portland cement Rice University engineers have developed a composite binder made primarily of fly ash, a byproduct of coal-fired power plants, that can replace Portland cement in concrete. The material is cementless and environmentally friendly, according to Rice materials scientist Rouzbeh Shahsavari, who developed it with graduate student Sung Hoon Hwang. Fly ash binder does not require the high-temperature processing of Portland cement, yet tests showed it has the same compressive…

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Using coal waste to create sustainable concrete

New coal concrete reduces energy demand, greenhouse emissions Washington State University researchers have created a sustainable alternative to traditional concrete using coal fly ash, a waste product of coal-based electricity generation. The advance tackles two major environmental problems at once by making use of coal production waste and by significantly reducing the environmental impact of concrete production. Xianming Shi, associate professor in WSU’s Department of Civil and Environmental Engineering, and graduate student Gang Xu, have developed a strong, durable concrete…