Aided-phytostabilization of steel slag dumps: The key-role of pH adjustment in decreasing chromium toxicity and improving manganese, phosphorus and zinc phytoavailability

To compare Cr (VI) tolerance, biosorption and bioaccumulation for initial carotenoidsproducing yeast Rhodotorula mucilaginosa UCM Y-1776 and its mutants, twenty stable mutants with various intensity of colors were obtained using nitrosoguanidine (NSG). The ultraviolet was found to be inefficient as a mutagen in our study. Light- and non-pigmented mutants (4L and 2) demonstrated a significant growth inhibition by 30 mg/l Cr (VI) whereas wild strain was able to grow at much higher chromium concentrations (500 mg/l). Cr (VI) sorption ability of R. mucilaginosa UCM Y-1776 was higher than those of mutants. Cr (VI) sorption/uptake parameters (Qmax, b) were found to be close for initial pink-pigmented R. mucilaginosa UCM Y-1776 (Qmax = 950 5M/g), and its light-pigmented mutant 4L (Qmax = 678 5M/g) and non-pigmented mutant 2 (Qmax = 790 5M/g) by non-living biomass. Non-pigmented “white” mutant 2 showed the highest ability to sorb chromium ions by living biomass (Qmax = 1020 mmol/g). The least chromiumtolerant light-pigmented (mutant 4L) and non-pigmented yeasts showed the highest chromium uptake for living biomass. The results showed that the presence of carotenoids did not affect Cr (VI) ions sorption by yeast biomass which could highlight significance of chitin and glucan-mannoprotein complex in chromium biosorption. However pigment absence increased Cr (VI) bioaccumulation by living yeast demonstrating the protective role of carotenoids against hexavalent chromium toxicity.

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Role of iron–lysine on morpho-physiological traits and combating chromium toxicity in rapeseed (Brassica napus L.) plants irrigated with different levels of tannery wastewater

Plant Physiology and Biochemistry ◽

10.1016/j.plaphy.2020.07.034 ◽

2020 ◽

Vol 155 ◽

pp. 70-84 ◽

Cited By ~ 5

Author(s):

Ihsan Elahi Zaheer ◽

Shafaqat Ali ◽

Muhammad Hamzah Saleem ◽

Muhammad Imran ◽

Ghalia S.H. Alnusairi ◽

...

Keyword(s):

Brassica Napus ◽

Physiological Traits ◽

Tannery Wastewater ◽

Chromium Toxicity ◽

Brassica Napus L ◽

Different Levels

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Role of multiple substrates (spent mushroom compost, ochre, steel slag, and limestone) in passive remediation of metal-containing acid mine drainage

Environmental Technology ◽

10.1080/09593330.2017.1422546 ◽

2018 ◽

Vol 40 (10) ◽

pp. 1323-1336 ◽

Cited By ~ 6

Author(s):

Verma Loretta M. Molahid ◽

Faradiella Mohd Kusin ◽

Zafira Madzin

Keyword(s):

Acid Mine Drainage ◽

Mine Drainage ◽

Steel Slag ◽

Mushroom Compost ◽

Spent Mushroom Compost ◽

Multiple Substrates ◽

Acid Mine ◽

Passive Remediation

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Enhanced humification by carbonated basic oxygen furnace steel slag – II. Process characterization and the role of inorganic components in the formation of humic-like substances

Bioresource Technology ◽

10.1016/j.biortech.2012.03.064 ◽

2012 ◽

Vol 114 ◽

pp. 637-643 ◽

Cited By ~ 27

Author(s):

Guangxia Qi ◽

Dongbei Yue ◽

Masami Fukushima ◽

Shigeki Fukuchi ◽

Ryo Nishimoto ◽

...

Keyword(s):

Steel Slag ◽

Basic Oxygen Furnace ◽

Basic Oxygen ◽

Process Characterization ◽

Furnace Steel ◽

Inorganic Components

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Steel slag carbonation in a flow-through reactor system: The role of fluid-flux

Journal of Environmental Sciences ◽

10.1016/j.jes.2014.06.041 ◽

2015 ◽

Vol 27 ◽

pp. 266-275 ◽

Cited By ~ 8

Author(s):

Eleanor J. Berryman ◽

Anthony E. Williams-Jones ◽

Artashes A. Migdisov

Keyword(s):

Steel Slag ◽

Reactor System ◽

Fluid Flux ◽

Flow Through

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The phytotoxic and fungicidal effects of Sodium o-Phenylphenate in controlling green mould wastage in oranges

Australian Journal of Agricultural Research ◽

10.1071/ar9580609 ◽

1958 ◽

Vol 9 (5) ◽

pp. 609 ◽

Cited By ~ 14

Author(s):

JK Long ◽

EA Roberts

Keyword(s):

Boric Acid ◽

Penicillium Digitatum ◽

Ph Adjustment ◽

Green Mould

Solutions of sodium o-phenylphenate control green mould wastage sue to (Penicillium digitatum) but can cause rind injury in oranges. Data are given on the effects of varying concentrations and pH levels of sodium o-phenylphenate solutions, duration of dip, rinsing, and the addition of hexamine. The occurence of rind injury is due to the absorption of o-phenylphenate and the effectiveness of waste control depends on the levels of both sodium o-phenylphenate and o-phenylphenate. The degree of rind injury depends primarily upon the concentration of o-phenylphenate in the solution, which can be controlled by pH adjustment. Accordingly, an explanation of the role of hexamine is given. Sodium o-phenylphenate control of mould wastage is superior to control by borax-boric acid.

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