Compositions, methods, and/or systems for managing sulfide
Certain exemplary embodiments can provide a system, machine, device, manufacture, and/or composition of matter configured for, adapted for, and/or resulting from, and/or a method for, activities that can comprise and/or relate to, causing reactions, between sulfides in contaminated water with a ferric chelate and between sulfides in the contaminated water with an oxidizing agent, to form substantially sulfide-free water, the substantially sulfide-free water comprising the ferric chelate and the oxidizing agent.
1. A method comprising:
continuously withdrawing, from an open container, contaminated water having a chemical oxygen demand of between approximately 2,000 mg/l and approximately 10,000 mg/l;
causing reactions, between sulfides in the contaminated water with a ferric chelate and between sulfides in the contaminated water with an oxidizing agent, to form substantially sulfide-free water, the substantially sulfide-free water comprising the ferric chelate and the oxidizing agent;
spraying the substantially sulfide-free water onto a top surface layer of the contaminated water in the container;
substantially suppressing escape of gaseous hydrogen sulfide from the top surface layer.
2. The method of claim 1 , further comprising:
applying an aqueous solution comprising the ferric chelate to the contaminated water.
3. The method of claim 1 , further comprising:
applying an aqueous solution comprising the oxidizing agent to the contaminated water.
4. The method of claim 1 , further comprising:
applying an aqueous solution comprising the ferric chelate to the contaminated water; and separately,
applying an aqueous solution comprising the oxidizing agent to the contaminated water.
5. The method of claim 1 , further comprising:
applying an aqueous solution comprising the ferric chelate to the contaminated water separately; and substantially simultaneously,
applying an aqueous solution comprising the oxidizing agent to the contaminated water.
6. The method of claim 1 , further comprising:
applying an aqueous solution comprising the ferric chelate to the contaminated water separately; and sequentially,
applying an aqueous solution comprising the oxidizing agent to the contaminated water.
7. The method of claim 1 , further comprising:
mixing an aqueous solution comprising the ferric chelate with the contaminated water.
8. The method of claim 1 , further comprising:
mixing an aqueous solution comprising the oxidizing agent with the contaminated water.
9. The method of claim 1 , further comprising:
via the reactions, converting the sulfides to elemental sulfur.
10. The method of claim 1 , further comprising:
retaining the contaminated water, ferric chelate, and oxidizing agent within one or more enclosed treatment vessels for sufficient time for the ferric chelate and oxidizing agent to reduce the concentration of the sulfides in the contaminated water to less than 0.1 mg/l.
11. The method of claim 1 , further comprising:
covering the top surface layer of the contaminated water in the container with the substantially sulfide-free water.
12. The method of claim 1 , further comprising:
substantially preventing mixing of the contaminated water within the top surface layer.
13. The method of claim 1 , wherein:
a sufficient quantity of the substantially sulfide-free water is applied onto the top surface layer to increase a depth of the substantially sulfide-free water in the container by approximately 0.5 centimeters to approximately 1.5 centimeters per hour.
14. The method of claim 1 , wherein:
the ratio of sulfides in the substantially sulfide-free water contains to sulfides in the contaminated water is less than 1%.
15. The method of claim 1 , wherein:
the contaminated water has a pH between approximately 6.8 and 7.2 at the time of the reactions.
16. The method of claim 1 , wherein:
the contaminated water has a pH between approximately 6.3 and 8.5 at the time of the reactions.
17. The method of claim 1 , wherein:
the substantially sulfide-free water contains less than 0.1 mg/l of sulfide.
18. The method of claim 1 , wherein:
the concentration of the ferric chelate in the substantially sulfide-free water is approximately 25 micrograms to approximately 35 micrograms per 1.0 mg of hydrogen sulfide in the substantially sulfide-free water.
19. The method of claim 1 , wherein:
the concentration of the ferric chelate in the substantially sulfide-free water is less than 50 micrograms per 1.0 mg of hydrogen sulfide in the substantially sulfide-free water.
20. The method of claim 1 , wherein:
the concentration of the ferric chelate in the substantially sulfide-free water is greater than 5 ppm.
21. The method of claim 1 , wherein:
the concentration of the oxidizing agent in the substantially sulfide-free water is greater than 10 ppm.
22. The method of claim 1 , further comprising:
the concentration of the oxidizing agent in the substantially sulfide-free water was approximately 1.5 mg to approximately 2.0 mg per 1.0 mg of hydrogen sulfide in the substantially sulfide-free water.
23. The method of claim 1 , further comprising:
the concentration of the oxidizing agent in the substantially sulfide-free water was less than 1.0 mg per 1.0 mg of hydrogen sulfide in the substantially sulfide-free water.