Laboratory evaluation of remediation of nitrobenzene contaminated aquifer by using groundwater circulation well

• Published in: Huanjing kexue Vol. 35; no. 10; p. 3775
• Main Authors: Bai, Jing, Zhao, Yong-Sheng, Sun, Chao, Qin, Chuan-Yu, Yu, Ling
• Format: Journal Article
• Language: Chinese
• Published: China 01.10.2014
• Subjects: Adsorption; Environmental Restoration and Remediation - methods; Groundwater - chemistry; Nitrobenzenes - analysis; Water Pollutants, Chemical - analysis
• ISSN: 0250-3301
• DOI: 10.13227/j.hjkx.2014.10.019

A two-dimension simulated sand box was set up to investigate the influencing factors, such as the initial groundwater level, aeration rate and the initial groundwater rate, that affect groundwater circulation well (GCW) by determining the intensity of groundwater circulation which was characterized by the variation of groundwater level before and after aeration. The optimal operating parameters were used to remediate nitrobenzene contaminated aquifer. The results demonstrated that: GCW could be well operated under the conditions of 45 cm groundwater level, 0.7 m3 · h(-1) aeration rate. The effects of groundwater velocity less than 1.0 m · d(-1) could be ignored. The lateral mobility rate of nitrobenzene was faster than that of longitudinal. The average concentration of nitrobenzene was 246.97 mg · L(-1) on day 50 of leakage. During the remediation of circulation well, an efficient organics remediation region was gradually formed around the circulation well. The organics in this region was removed preferential