Apparatus and method for cleaning chlorobenzenes-contaminated soil and groundwater

摘要

Apparatus and method for cleaning chlorobenzenes-contaminated soil and groundwater are provided related to environment protection. The apparatus includes a direct current power supply, permeable reactive barrier (PRB) reaction walls and electrodes, wherein the electrodes are arranged in a polluted area according the concentric circles, and are installed into electrode chambers; the PRB reaction walls are installed at ½ between the anode electrode and the cathode electrode and at ¼ from the anode electrode. Chlorobenzenes in the soil and groundwater can be gathered in the PRB reaction walls through the arrangement of the electrode area; and then the chlorobenzenes can be further removed by oxidation-reduction reactions in the PRB reaction walls.

主权项

1. An apparatus for remediation of chlorobenzenes-contaminated soil and groundwater, the apparatus comprising: a DC power supply (1), a first electrode (4-1), a second electrode (4-2), a third electrode (4-3), a first electrode chamber (2-1), a second electrode chamber (2-2), a third electrode chamber (2-3), pH probes (5), an automatic control device (7), an electrode solution storage tank (8), an electrode solution treatment pond (9), a multi-channel peristaltic pump (10), a single-channel peristaltic pump (11), a first PRB reaction wall (3-1), a second PRB reaction wall (3-2), a third PRB reaction wall (3-3), a fourth PRB reaction wall (3-4), a first pH adjustment fluid inlet pipe (6-1), a second pH adjustment fluid inlet pipe (6-2), an acid solution storage tank (12) and an alkali solution storage tank (13);
wherein: the DC power supply (1) is connected with the first electrode (4-1), the second electrode (4-2) and the third electrode (4-3) via wires; the first electrode (4-1) at a circle center and the outermost third electrode (4-3) are anodes that are connected with a positive terminal of the DC power supply (1); the second electrode (4-2) is a cathode that is connected with a negative terminal of the DC power supply (1); the first electrode (4-1), the second electrode (4-2) and the third electrode (4-3) are respectively arranged in the first electrode chamber (2-1), the second electrode chamber (2-2) and the third electrode chamber (2-3); the electrode solution storage tank (8) and the electrode solution treatment pond (9) are respectively connected with the automatic control device (7) via pipelines; the electrode solution storage tank (8) is connected with the electrode solution treatment pond (9) via pipelines and through the single-channel peristaltic pump (11); each of the electrode chambers are provided with one said pH probe (5), and each pH probe (5) is connected with the automatic control device (7); the automatic control device (7) is connected with the multi-channel peristaltic pump (10) via a pipeline, and the multi-channel peristaltic pump (10) is further connected with the first electrode chamber (2-1), the second electrode chamber (2-2) and the third electrode chamber (2-3) respectively via pipelines; the first PRB reaction wall (3-1) and the second PRB reaction wall (3-2) are arranged between the first electrode chamber (2-1) and the second electrode chamber (2-2), at distances of ¼ and ½ of a total distance between the first electrode chamber (2-1) and the second electrode chamber (2-2) from the first electrode chamber (2-1) respectively; the third PRB reaction wall (3-3) and the fourth PRB reaction wall (3-4) are arranged between the second electrode chamber (2-2) and the third electrode chamber (2-3), at distances of ½ and ¼ of a total distance between the second electrode chamber (2-2) and the third electrode chamber (2-3) from the third electrode chamber (2-3) respectively; the PH probes (5), the first pH adjustment fluid inlet pipes (6-1) and the second pH adjustment fluid inlet pipes (6-2) are arranged between the first PRB reaction wall (3-1) and the second PRB reaction wall (3-2) and between the third PRB reaction wall (3-3) and the fourth PRB reaction wall (3-4); the pH probes (5) are connected with the automatic control device (7), and the automatic control device (7) is connected with the acid solution storage tank (12) and an alkali solution storage tank (13) via pipelines; and the automatic control device (7) is connected with the first pH adjustment fluid inlet pipes (6-1) and the second pH adjustment fluid inlet pipes (6-2) through the multi-channel peristaltic pump (10).