Chinese authorities have confirmed that at least 114 people have perished in the explosions involving hazardous chemicals that occurred in the port of Tianjin on Aug. 12.
Although authorities have also insisted that chemical releases into the environment were limited, local residents claimed falling rain caused skin burns and white foam formed on roads a few days later near the blast site. Some residents have also held demonstrations demanding compensation for property damage and more information on relatives unaccounted for in the disaster.
Despite the confusion and displacement of people living and working near the site of the disaster, authorities say the sprawling port resumed operations on Aug. 18. Chemical producers in the area say they are working normally.
Officials still haven’t indicated what they suspect as the cause of the explosions. However, they revealed that among the hundreds of tons of about 40 different chemicals stored at the Ruihai International Logistics hazardous chemicals warehouse at the center of the explosions were large quantities of ammonium nitrate. Commonly used as a fertilizer, ammonium nitrate is also explosive and the cause of numerous industrial accidents such as the 2013 explosion at West Fertilizer Co. in Texas that killed 15 people.
Officials’ main concern, however, has been disposing of hundreds of tons of sodium cyanide, which releases flammable and toxic hydrogen cyanide gas on contact with water or acids, that they said was stored at the warehouse. The chemical is used in the mining industry to extract gold and other precious metals.
The Supreme People’s Procuratorate, China’s top prosecutorial office, is investigating the explosions in an effort to determine whether Ruihai was operating legally. Authorities say they have detained 10 senior executives of the company that owned the Ruihai warehouse.
The Tianjin Environmental Protection Bureau says it had deployed hundreds of officers to monitor air and water quality at and near the blast site in the Binhai industrial park. The bureau detected cyanide exceeding safety standards by more than 10 times in wastewater coming from the Binhai industrial zone.
But the bureau said the public was not at risk because the water could be contained. Levels of air pollution near the blast area were comparable to what they are on normal days, it emphasized.