Adsorption of Co(II) on Graphene Oxides
from Aqueous Solution

Zhu, Hua; Xu, Xuetao; Zhong, Xin

doi:10.15244/pjoes/63730

Cited by 9 publications

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the unique physical and chemical properties, graphene oxide (GO) have been widely used in multifunctional sensor materials [1,2], drug carrier [3,4], adsorbent material [5][6][7]. The discharge GO during their production and use inevitably lead to the wastewater with GO entering the sewage treatment process.…”

Section: Introductionmentioning

confidence: 99%

Responses of Performance and Microbial Community to Long-Term Graphene Oxide Exposure in a Sequencing Batch Reactor

Wang¹,

Zhang²,

Zhang³

et al. 2020

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

The widespread use of graphene oxide (GO) raises environmental concerns. Municipal wastewater treatment systems are potential receptors of GO containing streams, yet the influences of chronic toxicity of GO on these systems are poorly understood. In the present study, the responses of nutrient removal performance and microbial community to long-term GO exposure were investigated. The results showed that reduction in performance of COD, ammonia and phosphate removals was observed during the whole experiment. The highest effluent COD contents 56.07 mg/L occurred when influent GO concentration was 30 mg/L. Low concentration of GO (1-10 mg/L) had a greater impact on ammonia and phosphate removal performance, the highest effluent concentration of ammonia and phosphate was 9.51 mg/L and 2.72 mg/L. However, there was a certain recovery trend of removal efficiency in each concentration gradient. The results of 16S rRNA gene sequencing showed that long-term GO exposure significantly altered the composition and structure of activated sludge microbial communities. Specifically, both bacterial richness and evenness indexes decreased as the GO concentration increased. Significant shift of bacterial community structures was observed after GO addition and then recover slightly at recovery stage without GO addition. Moreover, functional bacteria, such as Dechloromonas, Nitrosomonas, Nitrospira, Defluviicoccus, and Chryseobacterium were significantly shifted, which may be associated with altered nutrient removal performances and EPS production. And protein content in EPS varied between 103.54 mg/L and 206.84 mg/L. The findings in this study provide new insights into our understanding of the potential effects of long-term GO exposure on wastewater treatment systems.

show abstract

Section: Introductionmentioning

confidence: 99%