US 11,897,797 B2
Method for remediating groundwater organic contamination by in-situ reaction zone
Shengyan Pu, Sichuan Province (CN); Hui Ma, Sichuan Province (CN); Dong Yu, Sichuan Province (CN); Dongyuan Luo, Sichuan Province (CN); Junyan Du, Sichuan Province (CN); Xinxin Ni, Sichuan Province (CN); Zhu Miao, Sichuan Province (CN); and Yu Wang, Sichuan Province (CN)
Assigned to CHENGDU UNIVERSITY OF TECHNOLOGY, Chengdu (CN)
Filed by CHENGDU UNIVERSITY OF TECHNOLOGY, Sichuan Province (CN)
Filed on May 18, 2023, as Appl. No. 18/198,994.
Claims priority of application No. 202210560881.7 (CN), filed on May 19, 2022; and application No. 202210996190.1 (CN), filed on Aug. 18, 2022.
Prior Publication US 2023/0373823 A1, Nov. 23, 2023
Int. Cl. C02F 1/70 (2023.01); C02F 1/72 (2023.01); B09C 1/00 (2006.01); C02F 101/36 (2006.01); C02F 103/06 (2006.01); C02F 101/34 (2006.01)
CPC C02F 1/705 (2013.01) [B09C 1/002 (2013.01); C02F 1/722 (2013.01); C02F 2101/345 (2013.01); C02F 2101/36 (2013.01); C02F 2103/06 (2013.01); C02F 2209/06 (2013.01); C02F 2209/29 (2013.01); C02F 2209/40 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for remediating groundwater chlorophenols organic contamination, comprising the following steps of:
step S1. determining a location of a contamination source;
step S2. setting up an injection well in upstream in a flowing direction of the groundwater of the contamination source; and
step S3. degrading chlorophenols organic contamination in groundwater in the to-be-remediated region by injecting a remediation reagent into groundwater in a to-be-remediated region through the injection well;
wherein,
the step S3 comprises: detecting a flow rate of the groundwater in the to-be-remediated region,
when the flow rate is greater than 4 m/d, the remediation reagent comprises sulfidated nanoscale zero-valent iron and hydrogen peroxide, wherein an iron-sulfur ratio in the sulfidated nanoscale zero-valent iron is 15; and
when the flow rate is smaller than or equal to 4 m/d, the remediation reagent comprises sulfidated nanoscale zero-valent iron modified by sodium carboxymethylcellulose and hydrogen peroxide, wherein the sodium carboxymethylcellulose in the sulfidated nanoscale zero-valent iron modified by sodium carboxymethylcellulose is used at a concentration of 1.0 g·L−1.