Study on the Extraction of Arsenic in Destruction Residues of Arsenical Chemical Weapons

Abstract:

In order to treat these arsenical residues produced when some arsenical chemical weapons were destroyed in Nanjing and recycle the arsenic, sulfuric acid was used as the extraction agent to extract the arsenic contained in the residuals, and single factor experiments and orthogonal experiments were carried out to study the effects of factors including concentration, liquid-to-solid ratio, temperature, shaking speed and time on the extraction effect. The results show that these five factors all have some effect on the arsenic extraction rate with the degree in the following order: Liquid-to-solid ratio> temperature> extraction agent concentration > time > shaking speed; when the sulfuric acid concentration is 1.2 mol/L and the liquid-to-solid ratio is 30, keeping the shaking speed at 200 r/min and extracting the residues at 40 °C for 2h, the arsenic extraction rate of the residues could reach up to 98.95%.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 2874-2879
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.2874
• Online since: June 2014
• Authors: Li Juan You, Ting Zhou*, Xue Feng Wang, Yong Xu, Gang Rao, Xin Meng
• Keywords: Arsenical Residues, Chemical Weapons Abandoned by Japan in China, Extraction Rate, Sulfuric Acid, Wet Extraction

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