Sulfate removal from the seawater using single-chamber bioelectrochemical system

Huang, Jing; Zeng, Cuiping; Luo, Haiping; Lin, Songwei; Liu, Guangli; Zhang, Renduo

doi:10.1016/j.desal.2022.116170

Cited by 8 publications

(2 citation statements)

References 50 publications

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“…The sulfate removal was 98.5% while the sodium acetate was completely consumed. It was found that sulfate was reduced to sulfide, with a final concentration of 498 mg L -1 , for 132 h. 54 Jin et al proposed a combination of nanofiltration and ettringite precipitation for sulfate removal from an electronics factory with an initial sulfate content of 900 mg L -1 . The nanofiltration permeate was mixed in the precipitation stage and subsequently destined for disposal or reuse.…”

Section: Process Combinationmentioning

confidence: 99%

Review of Sulfate Removal in Low Concentration Brine Solutions

Paulo Guilherme Freitas Melo,

Kátia Cecília de Souza Figueiredo

2024

SCE

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Sulfate is a common ion present in natural water bodies at low concentrations and as effluent in different metallurgical processes. The discharge of sulfate in rivers and waterbodies can cause direct and indirect damage to the environment. Regulatory agencies have been increasing the constraints in sulfate content limit for discharge focused on human equity and environmental protection. A common practice is the precipitation of sulfate with lime, but the remaining solution still has ca. 1,500 mg L-1 of sulfate, which is not acceptable for disposal or reuse. This work describes the main routes for sulfate removal such as chemical precipitation, biological degradation, ion exchange, and separation through membranes and discusses the main advantages and issues of each approach. One of the main challenges is to scale up the tests and show the performances at the industrial level. The subject must be the focus of constant study to obtain relevant results so that usual technologies are replaced by more innovative, cheap and efficient methods.

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Section: Process Combinationmentioning

confidence: 99%

Review of Sulfate Removal in Low Concentration Brine Solutions

Paulo Guilherme Freitas Melo,

Kátia Cecília de Souza Figueiredo

2024

SCE

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“…Furthermore, these same conditions resulted in a 60.00% reduction in sulfate concentration in seawater. Huang et al [26] employed a single-chamber bioelectrochemical system to investigate sulfate removal from seawater with an initial concentration of 2200 ± 200 mg/L under a current density of 3.4 ± 0.1 A/m 3 . The outcomes revealed a reduction in sulfate concentration to 498 ± 25 mg/L.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a Combined Approach for Sulfate and Ammonia Recovery from Treated Brine Using a Simultaneous Chemical Precipitation and Electrocoagulation Processes

Mohammad,

Haris,

Mourad

et al. 2023

Sustainability

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Soda ash (Na2CO3) is produced using the traditional Solvay process. It entails the reaction of CO2 with high-salinity water in the presence of ammonia (NH3), which produces insoluble sodium bicarbonate (NaHCO3) and soluble ammonium chloride (NH4Cl). In the current work, a newly combined approach has been developed to effectively manage the removal of ammonia and sulfate from the effluent of the Solvay process. The devised technique centers on an electrochemical coagulation process, complemented with the utilization of calcium oxide (CaO) as a buffering reagent. This innovative approach excels at achieving high recovery rates for both ammonia and sulfate. The recovered ammonia holds the potential for recycling, thereby contributing to the sustainability of the Solvay process by reusing ammonia in its initial stages. Furthermore, sulfate ions are recuperated in the form of calcium sulfate, a value-added product boasting various industrial applications. The results gleaned from this study underscore the efficacy of the ammonia recovery process, particularly when operating at elevated current densities and with higher calcium oxide concentrations. On the other hand, sulfate recovery demonstrates superior performance when exposed to moderate current densities and limited calcium oxide concentrations. Consequently, the integration of both stages within a single, cohesive process necessitates the development of an optimization methodology to cater to varying operational conditions. To address this need, second-order polynomial equations were formulated and employed to anticipate ammonia and sulfate removal rates in the integrated approach. Four independent variables come into play: calcium oxide concentration, current density, temperature, and mixing rate. The findings reveal that most of these variables exert substantial influences on both ammonia and sulfate removal rates, underscoring the need for careful consideration and fine-tuning to optimize the overall process. The maximum ammonia and sulfate removal were found to reach 99.50% and 96.03%, respectively, at a calcium oxide concentration of 3.5 g/100 mL, a current density of 19.95 mA/cm2, a temperature of 35 °C, and a mixing rate of 0.76 R/s. The results are promising, and the developed process is also suitable for recovering high concentrations of sulfate and ammonia from various wastewater sources.

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Sulfate-reducing ammonium oxidation: A promising novel process for nitrogen and sulfur removal

Ding

Zhong

et al. 2023

Science of The Total Environment

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Sulfate removal from the seawater using single-chamber bioelectrochemical system

Cited by 8 publications

References 50 publications

Review of Sulfate Removal in Low Concentration Brine Solutions

Review of Sulfate Removal in Low Concentration Brine Solutions

Evaluation of a Combined Approach for Sulfate and Ammonia Recovery from Treated Brine Using a Simultaneous Chemical Precipitation and Electrocoagulation Processes

Sulfate-reducing ammonium oxidation: A promising novel process for nitrogen and sulfur removal

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