Research on the Preparation of Organic Modified Bentonite and the Control of Biological Invasion in Ballast Water

Abstract:

In this research, the effect of modified bentonite on removing harmful organisms in ballast water was discussed using HDTMA⁺ modified bentonite as flocculating material, and Alexandrium tamarense, Nitzchia closterium, and Photobacterium phosphoreum as the objects of harmful organisms, and also through an observation of the reaction mechanism between HDTMA⁺ and bentonite with Fourier transform infrared spectroscopy (FTIR). The result showed that there was an effective combination of HDTMA⁺ with bentonite, and the modified organic bentonite possessed a powerful ability to remove harmful organisms. The removal rate against Alexandrium tamarense within 24h was greater than 85% if the dosage of the organic bentonite was 0.03 g/L; the removal rate against Nitzchia closterium was approximate to 80% if the dosage was 0.06 g/L; the luminous intensity could not be displayed by luminescent bacteria under the condition of concentration 0.30 g/L, and also the original soil with modification did not shown a significant removal effect under the same dosage. Therefore, it was concluded that the conditions such as aging time, organic bentonite’s particle size, and HDTMA⁺ dosage were the important factors affecting the harmful biological removal efficiency.

• Periodical: Applied Mechanics and Materials (Volumes 608-609)
• Pages: 1136-1140
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.608-609.1136
• Online since: October 2014
• Authors: Yan Hua Pang*, Ji Juan Cao, Bing Sun
• Keywords: Ballast Water, Flocculation, Invasive Organisms, Organic Bentonite

References

[1] China Classification Society. Guidelines for Preparation of Ship's Ballast Water Management Plan [M]. Beijing: China Communications Press, (2006).

[2] Committee on Ships' Ballast Operations, National Research Council. Stemming the Tide: Controlling Introductions of Non-indigenous Species by Ships' Ballast Water [M]. Washington: National Academy Press, (1996).

DOI: 10.17226/5294

[3] Gregory M, Ruizet C. Global Spread of Microorganisms by Ships [J]. Nature, 2000, 408: 49-50.

[4] Shirota A. Red Tide Problem and Countermeasures [J]. Int. J. Aquat. Fish Technol., 1989, 1(1): 25-38.

[5] Geoff R. From Ballast to Bouillabaisse [J]. Science, 2000, 289: 241.

[6] Mountfort D O, Hay C, Dodgshun T, et al. Oxygen deprivation as a treatment for ships' ballast water-laboratory studies and evaluation[J]. J. Mar. Environ. Eng., 1999, 5(3): 1.

[7] Rigby G R, Hallegraeff G M, Sutton C. Novel Ballast Water Heating Technique Offers Cost-effective Treatment to Reduce the Risk of Global Transport of Harmful Marine Organisms [J]. Mar. Ecol-Prog. Ser. 1999, 191: 289-293.

DOI: 10.3354/meps191289

[8] Armstrong G, Brookes E, Lankester R, et al. Ballast system design for a flow through exchange of ballast water[J]. Trans. Inst. Mar. Eng., 1997, 109(3): 257-269.

[9] Oemcke D J, van Leeuwen J H. Ozonation of the Marine Dinoflagellate Alga Amphidinium Sp. -Implications For Ballast Water Disinfection [J]. Water Res., 2005, 39(20): 5119-5125.

DOI: 10.1016/j.watres.2005.09.024

[10] Pang Yan-hua, Ding Yong-sheng, Sun Bing, et al. Preparation of Organic Kaolin and Its Application in Removing Nonindigenous Organisms from Ships' Ballast Water [J]. Journal of Dalian Maritime University, 2007, 33(2): 58-62. (in chinese).

[11] Smith J A, Galan A. Sorption of Nonionic Organic Contaminations to Single and Dual Cation Bentonites from Water [J]. Environ. Sci. Technol., 1995, 29(3): 685-692.

DOI: 10.1021/es00003a016