In-situ bioremediation method of marine pollutant sedimentary environment
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A marine pollution and bioremediation technology, applied in the field of environmental pollution control, to achieve the effect of improving efficiency and promoting bioavailability
Inactive Publication Date: 2012-02-08
DALIAN OCEAN UNIV
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Embodiment 1
[0019] The 1,000-mu Shuangtaizi River Estuary in Panshan County, Liaoning Province, located in Liaodong Bay, is flat, close to the river mouth, can naturally receive tides for more than 4 times during high tides, is suitable for the growth of Suaeda salsa, and is rich in organic matter. The total organic carbon (TOC) content of tidal flats in the restored area varies with the seasons, ranging from 8.28 mg / g to 19.02 mg / g; the content of total phosphorus varies from 0.37 mg / g to 0.53 mg / g; the content of total nitrogen is 0.512 mg / g.
[0020] Build a 10 cm high dike at the lower limit of the above-mentioned restoration area; and mechanically plow the tidal flats in the long dike, and the soil loosening depth must be greater than 30 cm. In the middle of March of the following year, Suaeda salsa was artificially sown when the surface of the restoration area began to thaw, and the sowing density was 1kg / mu. When sowing, the beach surface temperature is 3°C, the bottom is 5cm, and...
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[0037] Shuangtaizi River Estuary in Panshan County, Liaoning Province is located in the Liaodong Bay Tidal Flat surface 0-30cm sediment quality, the indicators are as follows: Ph=8.3, heavy metal copper 30.068mg / kg, cadmium 0.224mg / kg, lead 10.125mg / kg, zinc 42.765 mg / kg, 3.67% organic matter, 0.07% total nitrogen, used for heavy metal treatment test.
[0038] Apply fermented, sun-dried and ground livestock and poultry organic fertilizers through a 50-mesh sieve to the test soil. Weigh 0.5kg of air-dried and ground sediment into a plastic pot (diameter 10cm), according to the "Marine Sediment Quality Standard" (GB 18668-2002), respectively with CuSO 4 Add 0mg / kg, 100mg / kg, 200mg / kg, 400mg / kg divalent copper ions (Cu 2+), indoor dry-wet cultivation for 1 month, and after reaching equilibrium, transplant young Suaeda salsa plants with 6 true leaves (20 plants per pot), and insert 2 clam worms into each pot, with an average weight of 1.5g; The corresponding treatment without ac...
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Abstract
The invention discloses an in-situ bioremediation method of a marine pollutant sedimentary environment. The method comprises steps that: a long dam is constructed at a remediation area which is a tidal flat with heavy-metal pollution or with a high eutrophication degree; mechanical plowing is carried out upon the tidal flat; suaeda heteroptera artificial sowing and colonization are carried out atthe remediation area in spring; fermented, dried and crushed livestock and poultry organic fertilizer is applied to the remediation area before lobworm seedlings are transplanted; and lobworm seedlings of above 10 setigers are transplanted into the remediation area. According to the invention, with lobworm and suaeda heteroptera, a lobworm-suaeda heteroptera in-situ combined bioremediation systemis constructed. Through the reformation upon the tidal flat, appropriate conditions are provided for the growth of lobworm and suaeda heteroptera. Lobworm has an advantage that in a sedimentary environment, pollutants such as heavy metals can be biologically utilized by lobworm. With the method provided by the invention, the advantage is reinforced, such that the bioavailability and the biological enrichment processes of the pollutants are promoted in suaeda heteroptera. Therefore, mutual ecological and metabolic pathway complementation of lobworm and suaeda heteroptera in the sedimentary environment is realized, such that the efficiency of the in-situ combined bioremediation process is improved.
Description
technical field [0001] The invention relates to a method for controlling environmental pollution, especially a method for controlling marine environment pollution. Background technique [0002] Due to the discharge of industrial and domestic sewage in coastal towns and the development of mariculture, coastal beaches are seriously polluted, especially the problems of carbon, nitrogen, and phosphorus eutrophication. At present, there is no effective method for large-scale control of this pollution problem. Contents of the invention [0003] The purpose of the present invention is to provide an in-situ bioremediation method with strong adaptability, high bioavailability, and the ability to control marine polluted depositional environments on a large scale. The present invention is mainly to establish an in-situ joint bioremediation system of clamworm and suaeda salsa, that is, a method for allowing clamworm and suaeda salsa to grow and metabolize in a polluted marine deposit...
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