At the beginning of this year, a chemical company in Linyi City, Shandong Province had accidental discharge, causing the arsenic concentration in the water bodies of the Pichang Flood Diversion Road, Chenghe and Ganghe at the junction of Shandong and Jiangsu provinces to exceed the standard. Mahu drinking water source is threatened. Under the guidance and command of the Ministry of Environmental Protection, the Environmental Protection Department of Jiangsu Province, and the Xuzhou Environmental Protection Bureau, the Pizhou Municipal Government successfully intercepted arsenic-excess water bodies within its territory. Through measures such as intercepting upstream water and intercepting river water containing arsenic, the water body containing arsenic exceeding the standard is effectively controlled in the 11 km section from Liulin to Yisuzha, and the polluted water body of the Cheng River is controlled in the section between Pichengzha and Xiangshui Liu. The Ganghe dyed water body is controlled in the 16-kilometer section from Wulouzha to Picheng Shiplock, and the total amount of arsenic exceeding the standard water body is about 4.5 million cubic meters. Entrusted by the Linyi Municipal Government of Shandong Province, the Institute of Water Science of Beijing Normal University organized personnel to treat polluted water bodies.
Based on the experimental results of the adsorption performance of activated alumina on arsenic-contaminated water samples on site, and through expert argumentation, they formulated a technical plan for the treatment of activated alumina adsorption dams. After several testing, government finally choose XR105 activated alumina to solve this big pollution. In the plan, the treated arsenic-containing alumina is desorbed and washed, and then the arsenic is concentrated, precipitated and solidified to achieve harmless disposal. At the same time, the alumina can be recycled and reused.
The relevant person in charge of the Emergency Investigation Center of the Ministry of Environmental Protection has visited the pollution control site many times to guide the emergency control of arsenic-contaminated water bodies. The treatment operation for more than one month shows that this scheme is very successful. It has the advantages of high efficiency, low cost, no sediment pollution, simple operation and no secondary pollution and damage to the river ecological environment. At present, 4.5 million cubic meters of arsenic-excess water bodies have all been effectively disposed of through engineering measures, reaching the surface water quality standards of Class III.