Recent advances in heavy metal recovery from wastewater by biogenic sulfide precipitation

Kumar, Manoj; Nandi, Moumita; Pakshirajan, Kannan

doi:10.1016/j.jenvman.2020.111555

Cited by 123 publications

(45 citation statements)

References 114 publications

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“…For example, H 2 S has been used as a reagent, which is generated through a sulfidogenic process, so that the sulfate contained in the AMD is reduced (biogenic sulfide precipitation, BSP). Recent review articles show advances in BSP for different metals [60], or they are alternatively based on arsenic [61]. These studies have described the bioreactors used to generate H 2 S, the configuration options in the process to optimize the sulfate and metals/arsenic removal, and future applications.…”

Section: Acid Mine Drainages (Amd)mentioning

confidence: 99%

“…For BSP processes, different types of bioreactors have been proposed and studied [60]. When using this method, a single-stage (i.e., sulfate reduction and sulfide precipitation occur in the same reactor) and two-or multiple-stage (i.e., sulfate reduction and sulfide precipitation are performed in different reactors) reactors were evaluated.…”

Section: Reactor Typementioning

confidence: 99%

“…For singlestage reactors, the inverse fluidized bed reactor (IFBR) [75] and the FBR [76] were tested. However, for two-or multi-stage operations, the metal sulfide precipitation reactor was applied in conventional CSTR [60]. The main drawbacks, benefits, and an exhaustive summary of different bioreactors assessed for sulfate reduction can be found in the review article by Kumar and colleagues [60].…”

Section: Reactor Typementioning

confidence: 99%

“…Typically, the use of Na 2 S and NaHS solutions are implemented at an industrial scale [3,4], and the study of the BSP method gains interest in the scientific community due to the possibility of removing sulfate, generating the sulfide source. The description and main findings regarding BSP are detailed in recent review articles [60,79]. Therefore, this section is not focused on conventional sulfide sources or the BSP method, but it describes novel trends in the use of alternative sulfide sources or proposals for new materials or methods to release this reagent.…”

Section: Sulfide Reagent Sourcesmentioning

confidence: 99%

“…The use and application studies of metal sulfide nanoparticles (NPs) have increased in several fields, such as biomedicine, environmental remediation, agriculture, electronics, and catalytic reactions [60], as well as diverse applications such as surface coating, nanoswitches, solar cell components, radiation absorbers, photocatalysts, gas sensors, and dielectric filters [103]. Likewise, several routes for the synthesis of metal sulfide NPs have been proposed [104], even using ionic liquids [105].…”

Section: Nanoparticle Productionmentioning

confidence: 99%

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Metal Sulfide Precipitation: Recent Breakthroughs and Future Outlooks

2021

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The interest in metal sulfide precipitation has recently increased given its capacity to efficiently recover several metals and metalloids from different aqueous sources, including wastewaters and hydrometallurgical solutions. This article reviews recent studies about metal sulfide precipitation, considering that the most relevant review article on the topic was published in 2010. Thus, our review emphasizes and focuses on the overall process and its main unit operations. This study follows the flow diagram definition, discussing the recent progress in the application of this process on different aqueous matrices to recover/remove diverse metals/metalloids from them, in addition to kinetic reaction and reactor types, different sulfide sources, precipitate behavior, improvements in solid–liquid separation, and future perspectives. The features included in this review are: operational conditions in terms of pH and Eh to perform a selective recovery of different metals contained in an aqueous source, the aggregation/colloidal behavior of precipitates, new materials for controlling sulfide release, and novel solid–liquid separation processes based on membrane filtration. It is therefore relevant that the direct production of nanoparticles (Nps) from this method could potentially become a future research approach with important implications on unit operations, which could possibly expand to several applications.

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Section: Acid Mine Drainages (Amd)mentioning

confidence: 99%

Section: Reactor Typementioning

confidence: 99%