Efficiency and mechanisms of antimony removal from wastewater using mixed cultures of iron-oxidizing bacteria and sulfate-reducing bacteria based on scrap iron

Li, Yongchao; Xu, Zheng; Wu, Jixin; Mo, Ping

doi:10.1016/j.seppur.2020.116756

Cited by 23 publications

(12 citation statements)

References 51 publications

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“…As shown in Table S1 , the total investment of field project in this study was 2.8 million China Yuan, which mainly included the charges of construction work, breeding equipment, mussel/microalgae/bacteria cultivation, operations management, and so on. Compared with the traditional chemical method, the cost of biological treatment was not high 44 , 45 . Although mussel farming for water remediation was evaluated in lagoon 9 , pond 46 , and lake 47 , mussel/microalgae/bacteria farming in this study proved that it can be a cost-effectiveness of pollution control method, and good for the development of local aquaculture industry.…”

Section: Discussionmentioning

confidence: 99%

Effective treatment of aquaculture wastewater with mussel/microalgae/bacteria complex ecosystem: a pilot study

Geng

Xue

et al. 2022

Sci Rep

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The discharge of aquaculture wastewater increased significantly in China. Especially, high content of nitrogen and phosphorus in wastewater could destroy the receiving water environment. To reduce the pollution of aquaculture wastewater, farmed triangle sail mussel (Hyriopsis cumingii) was proposed to be cultivated in the river. This was the first time that bacteria (Bacillus subtilis and Bacillus licheniformis) and microalgae (Chlorella vulgaris) were also used and complemented ecosystem functions. The pollutants in wastewater were assimilated by Chlorella vulgaris biomass, which was then removed through continuous filter-feeding of Hyriopsis cumingii. While, Bacillus subtilis and Bacillus licheniformis enhanced the digestive enzyme activities of mussel. It demonstrated that approximately 4 mussels/m3 was the optimal breeding density. Under such condition, orthogonal experiment indicated that the dose of Bacillus subtilis, Bacillus licheniformis, and Chlorella vulgaris should be 0.5, 1, and 2 mL respectively. Compared with mussel, mussel/microalgae, mussel/bacteria system, treatment ability of the mussel/microalgae/bacteria system in batch experiment was better, and 94.67% of NH3-N, 92.89% of TP and 77.78% of COD were reduced after reaction for 6 days. Finally, 90 thousand mussels per hectare of water were cultivated in Kulv river in China, and the field experiment showed that water quality was significantly improved. After about 35 days of operation, NH3-N, TN, TP and COD concentration were maintained around 0.3, 0.8, 0.3, and 30 mg/L respectively. Therefore, the mussel/microalgae /bacteria system in this study showed a sustainable and efficient characteristic of aquaculture wastewater bioremediation.

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Section: Discussionmentioning

confidence: 99%

Effective treatment of aquaculture wastewater with mussel/microalgae/bacteria complex ecosystem: a pilot study

Geng

Xue

et al. 2022

Sci Rep

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“…During the field investigation, the authors found that there were millions of tons of ATWRs in XKS ( Figure 1 ). These ATWRs occupy valuable land resources, resulting in serious Sb contamination of the local environments [ 42 , 43 ]. The sampled ATWR was mixed and crushed into ATCA, of which the particle size was 5 mm–20 mm.…”

Section: Materials and MIX Ratio Of Concretementioning

confidence: 99%

Strength and Durability Properties of Antimony Tailing Coarse Aggregate (ATCA) Concrete

Wang

Zhang

et al. 2021

Materials

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Antimony (Sb) is a trace element applied widely in modern industry. A large number of tailing solid wastes are left and accumulated in the mining area after purifying the precious antimony from the antimony ores, causing serious pollution to the environment. The major aim of this study is to investigate the feasibility of utilizing antimony tailing coarse aggregate (ATCA) as a complete substitute for natural coarse aggregate (NCA) in high-strength concrete. Concrete specimens with 25%, 50%, 75%, and 100% ATCA replacing the NCA in conventional concrete were prepared for evaluating the performance of ATCA concrete. The investigators find that ATCA concrete has good workability, and the mechanical properties and long-term behavior (shrinkage and creep) of ATCA concrete with all replacement levels are superior to those of NCA concrete. The durability indices of ATCA concrete, such as the frost-resistant, chloride permeability, and resistance to carbonation, are better than those of NCA concrete. While the alkali activity and cracking sensitivity behavior of ATCA concrete seem to be decreased, nevertheless, the difference is not significant and can be neglected. The researchers demonstrate that all of the control indices of ATCA concrete meet the requirements of the current industry standards of China. Overall, ATCA can be used in concrete to minimize environmental problems and natural resources depletion.

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“…Excitingly, functional groups found in the iron mat appear to have potential in the removal of contaminants from waterways. In a study using isolated FeOB and SRB from sewage sludge of Xiangtan City, China, cocultures were more effective at attenuating antimony [Sb(V)] than isolates ( 116 ), indicating the importance of these interactions in contaminant transformations and community function. Similar mechanisms likely play out in iron mats, which are often found in urban environments, such as the North Carolina Piedmont ( 20 ), that are prone to increased pollutants.…”

Section: The Solution To Pollution Is…iron Mats?mentioning

confidence: 99%

Iron Flocs and the Three Domains: Microbial Interactions in Freshwater Iron Mats

Brooks

Field

2020

mBio

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Freshwater iron mats are dynamic geochemical environments with broad ecological diversity, primarily formed by the iron-oxidizing bacteria. The community features functional groups involved in biogeochemical cycles for iron, sulfur, carbon, and nitrogen. Despite this complexity, iron mat communities provide an excellent model system for exploring microbial ecological interactions and ecological theories in situ. Syntrophies and competition between the functional groups in iron mats, how they connect cycles, and the maintenance of these communities by taxons outside bacteria (the eukaryota, archaea, and viruses) have been largely unstudied. Here, we review what is currently known about freshwater iron mat communities, the taxa that reside there, and the interactions between these organisms, and we propose ways in which future studies may uncover exciting new discoveries. For example, the archaea in these mats may play a greater role than previously thought as they are diverse and widespread in iron mats based on 16S rRNA genes and include methanogenic taxa. Studies with a holistic view of the iron mat community members focusing on their diverse interactions will expand our understanding of community functions, such as those involved in pollution removal. To begin addressing questions regarding the fundamental interactions and to identify the conditions in which they occur, more laboratory culturing techniques and coculture studies, more network and keystone species analyses, and the expansion of studies to more freshwater iron mat systems are necessary. Increasingly accessible bioinformatic, geochemical, and culturing tools now open avenues to address the questions that we pose herein.

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Efficiency and mechanisms of antimony removal from wastewater using mixed cultures of iron-oxidizing bacteria and sulfate-reducing bacteria based on scrap iron

Cited by 23 publications

References 51 publications

Effective treatment of aquaculture wastewater with mussel/microalgae/bacteria complex ecosystem: a pilot study

Effective treatment of aquaculture wastewater with mussel/microalgae/bacteria complex ecosystem: a pilot study

Strength and Durability Properties of Antimony Tailing Coarse Aggregate (ATCA) Concrete

Iron Flocs and the Three Domains: Microbial Interactions in Freshwater Iron Mats

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