Control of toxic sulfide in mariculture environment by iron-coated ceramsite and immobilized sulfur oxidizing bacteria

Xiao Wang; Junpeng Wang; Yang-Guo Zhao; Farhana Maqbool; Liang Guo; Mengchun Gao; Chunji Jin; Junyuan Ji

doi:10.1016/j.scitotenv.2021.148658

Control of toxic sulfide in mariculture environment by iron-coated ceramsite and immobilized sulfur oxidizing bacteria

Sci Total Environ. 2021 Nov 1:793:148658. doi: 10.1016/j.scitotenv.2021.148658. Epub 2021 Jun 24.

Authors

Xiao Wang¹, Junpeng Wang¹, Yang-Guo Zhao², Farhana Maqbool³, Liang Guo⁴, Mengchun Gao⁴, Chunji Jin⁴, Junyuan Ji⁵

Affiliations

¹ Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
² Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Lab of Marine Environmental Science and Ecology (Ocean University of China), Ministry of Education, Qingdao 266100, China. Electronic address: ygzhao@ouc.edu.cn.
³ Department of Microbiology, Hazara University, Mansehra 21300, Pakistan.
⁴ Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Lab of Marine Environmental Science and Ecology (Ocean University of China), Ministry of Education, Qingdao 266100, China.
⁵ Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering (MEGE), College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; Key Lab of Marine Environmental Science and Ecology (Ocean University of China), Ministry of Education, Qingdao 266100, China. Electronic address: tengfei_945@ouc.edu.cn.

PMID: 34328974
DOI: 10.1016/j.scitotenv.2021.148658

Abstract

Hydrogen sulfide (H₂S) is considered one of the serious toxic pollutants in mariculture environment. Consequently, it is necessary to develop an effective strategy to prevent the production of sulfide. In this study, we modified the ceramsite with iron (ICC) and prepared a microbial agent, i.e., the immobilized sulfur-oxidizing-bacterium on the ICC (SICC), the microbial agent was following dosed in the simulated mariculture systems to control the sulfide pollutant. Results showed that the sulfide removal capacity of the new material ICC reached to 3.42 mg S g^-1 in 24 h. Comparably, the microbial agent SICC presented a stable capability in oxidizing sulfide and the sulfide removal was above 65% in test media feeding with 600 mg L^-1 sulfide even after five times of recycling. The microcosm experiments conducted in the simulated mariculture systems showed that the application of the ICC together with the SICC was able to quickly remove the existing sulfide and persistently inhibit the production of sulfide, the immobilized sulfur-oxidizing-bacterium survived stably in the new environment accounting for 1.22% of total microbial community. Therefore, dosing the ICC and SICC simultaneously might be a preferable strategy and presented a promising perspective in remediating the deteriorated mariculture environment.

Keywords: Ecological restoration; Immobilization; Iron oxide; Modified-ceramsite; Sulfur-oxidizing bacteria.

MeSH terms

Bacteria
Bioreactors
Complex Mixtures
Hydrogen Sulfide*
Iron*
Oxidation-Reduction
Sulfides
Sulfur

Substances

Complex Mixtures
Sulfides
ceramsite
Sulfur
Iron
Hydrogen Sulfide