Study on Phosphorus Release from Sediment Control by In Situ Control Technology

Abstract:

This paper test to processing lakes sediment by three kinds of in-situ control technology which including aeration, zeolite capping and calcium nitrate in situ treatments, and it study the influence of phosphorus release from sediment. The test results showed: (1) under anaerobic conditions, the phosphorus release content is as 4.26 times as it under aerobic conditions. Under aerobic condition (dissolved oxygen saturation ≥ 20%), the Dissolved oxygen is not important for phosphorus release in sediments.（2）zeolite capping can effectively control the phosphorus release from sediment, but Dissolved oxygen is important for that. Under dynamic condition, the phosphorus release content is stability.（3）Under aerobic conditions or anaerobic conditions, calcium nitrate in situ treatments can effectively control the phosphorus release from sediment. Under aerobic conditions, the phosphorus release content reduce by 53.6%.Under anaerobic conditions, it reduce by 83.4%.(4) The control effects of the phosphorus release content by three kinds of in-situ control technology was followed: under anaerobic condition, calcium nitrate in-situ treatment > zeolite capping> untreated; and under aerobic condition, calcium nitrate in-situ treatment > zeolite capping > aeration ≥ untreated; and under hydrodynamic condition, calcium nitrate in-situ treatment >zeolite coverage>zeolite capping> aeration >untreated.

• Periodical: Advanced Materials Research (Volumes 374-377)
• Pages: 899-904
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.374-377.899
• Online since: October 2011
• Authors: Li Jun Bi, Jing Yang, Shi Quan Sun
• Keywords: In Situ Control Technology, Phosphorus Release, Sediment

References

[1] Guangwei Zhu, Baiqiang Qing, Guang Gao, et. Fractionation of phosphorus in sediments and its relation with soluble phosphorus contents in shallow lakes located in the middle and lower reaches of ChangJiang River. ACTA Scientiae Circumstantlae, 2004, 24(3): 354-358.(in Chinese)

[2] Jie Zhang. Drainage engineering (the fourth edition) [M].Bei Jing: China architecture &building press, 2000.

[3] Petticrew E L., Arocena J M.. Evaluation of iron-phosphate as a source of internal lake phosphorus loadings [J]. The Science of the Total Envitanment, 2001, 266: 87-93.

DOI: 10.1016/s0048-9697(00)00756-7

[4] Zhiqiang Xing, Yinguang Chen, Haizheng Yang. Advances in the Key Factors Affecting Enhanced Biological Phosphorus Removal. Environmental Protection Science, 2006, 32(1): 31- 33.

[5] Fu Sun, Siyu Zeng, Jining Chen. Assessment of techniques for sediment pollution control within eutrophic lakes The environmental pollution control technology and equipment, 2006, 32(1): 31- 33.

[6] Hengpeng Ye, Fanzhong Chen, Yanqing Sheng. Suppressing phosphate liberation from urban river sediment using capping method. ACTA Scientiae Circumstantlae, 2006, 26(2): 262-268.

[7] Lu Zhang, Chengxin Fan, Baiqiang Qin. Phosphorus Release and Absorption of Surficial Sediments in Taihu Lake under Simulative Disturbing Conditions. Journal of lake sciences, 2001, 13(l): 35-42.

DOI: 10.18307/20010106