Heavy Metal Mitigation with Special Reference to Bioremediation by Mixotrophic Algae-Bacterial Protocooperation

Shekharaiah, P. S. Chandra; Sanyal, Debanjan; Dasgupta, Santanu; Sapre, Ajit; Banik, Avishek

doi:10.1007/978-3-030-45975-8_15

Cited by 8 publications

(3 citation statements)

References 161 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The bleaching could be due to the oxidative effects of lead on cell membrane and Chl a content. Heavy metals are known to affect chlorophyll synthesis (Baracho et al, 2019) by interacting with functional sulfhydryl (SH) groups of enzymes involved in chlorophyll biosynthesis (Rekha & Mastan, 2011) and can induce oxidative damage to cell membrane (Chandrashekharaiah, Sanyal, Dasgupta, Sapre, & Banik, 2020). Heavy metals like lead, copper, and mercury act as a substitute for Mg 2+ ion of chlorophyll molecule and affect the light absorption and photosynthesis (Banik et al, 2018; Kupper et al, 2002), thereby affects the CO 2 fixation and biomass production.…”

Section: Discussionmentioning

confidence: 99%

“…The essential heavy metals are required for many physiological functions at very low concentrations (Naskar et al, 2016). However, these metals are toxic at very high concentration for example, copper at higher concentration decreases the photosystem II (PSII) efficiency and causes oxidative damage (Chandrashekharaiah, Sanyal, Dasgupta, Sapre, & Banik, 2020). The non‐essential heavy metals (cadmium, lead, and mercury) do not have any known biological role and are toxic at very low concentrations (Mahapatra et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…The non‐essential heavy metals (cadmium, lead, and mercury) do not have any known biological role and are toxic at very low concentrations (Mahapatra et al, 2012). Non‐essential heavy metals exert adverse effects by inactivating photosynthetic machinery, enzymatic pathway, growth, and morphology of algae (Chandrashekharaiah, Sanyal, Dasgupta, Sapre, & Banik, 2020).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Phycoremediation and photosynthetic toxicity assessment of lead by two freshwater microalgae Scenedesmus acutus and Chlorella pyrenoidosa

Shivagangaiah

Sanyal

Dasgupta

et al. 2021

Physiologia Plantarum

Self Cite

View full text Add to dashboard Cite

Heavy metal (HM) pollution is a serious agro‐economic concern and algae can be used as one of the bioremediating agents as it can grow in different water bodies. In this study, the Scenedesmus acutus and Chlorella pyrenoidosa were exposed to various concentrations of Pb2+ for 96 h and a multidimensional toxicity assessment has been performed by pulse amplitude modulation technique and Fourier transform infrared spectroscopy (FTIR). High‐angle annular dark‐field scanning transmission electron microscopy coupled energy dispersive spectroscopy (HAADF‐S/TEM‐EDS) detected intracellular localization of Pb2+, thus confirming algal bio‐accumulation abilities. Sensitivity assay demonstrated that 500 and 400 ppm of Pb2+ as minimum inhibitory concentrations (MIC50) for S. acutus and C. pyrenoidosa, respectively, which inhibited growth (OD) by >50% in 96 h. During bioremoval studies, S. acutus and C. pyrenoidosa were found to remove ∼52 and ∼32% of total Pb2+, respectively. The particulate analysis of Pb2+ by ICP‐OES showed >99.5% biosorption capacity by both the species. The biomass characterization by FTIR showed the involvement of various cell wall functional groups such as hydroxyl, alkane, and C=C groups in the biosorption of Pb2+ by both the species. The noninvasive chlorophyll fluorescence techniques provide a quick insight on heavy metal stress and can be adapted as a rapid detection tool to study the Pb2+ stress. S. acutus strain showed higher tolerance and higher bioremoval capacity than C. pyrenoidosa. However, both the species can be exploited for biosorption of Pb2+ from aquatic streams as an alternative way for low cost Pb2+recovery systems.

show abstract