Nanoscale copper in the soil-plant system – toxicity and underlying potential mechanisms. Journal of Environmental Quality, 22, 141–147.Īnjum, N. Soil nitrate concentrations under corn as affected by tillage, manure, and fertilizer applications. American Public Health Association, American Water Works Association, Water Environment Federation.Īngle, J. Standard methods for the examination of water and waste water (23rd ed.).
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RSC Advances, 4, 20441–20448.Īmerican Public Health Association. Synthesis of graphene from natural and industrial carbonaceous wastes. Ecotoxicology and Environmental Safety, 179, 182–187.Īkhavan, O., Bijanzad, K., & Mirsepah, A. Adsorption of nitrate, phosphate, nickel and lead on soils: risk of groundwater contamination.
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The changes of the major ions in soil by the exposure of graphene nanomaterials have also affected the response of selected bacteria.Ībdelwaheb, M., Jebali, K., Dhaouadi, H., & Dridi-Dhaouadi, S. Graphene also influenced the concentrations of the major ions in soil and the order of the influence degree was sulfate > phosphate > ammonia > nitrate. The results showed that graphene retention was influenced the soil zeta potentials. Moreover, to evaluate the impact of the risks of graphene nanomaterial contamination on soil major ions, the present study also examines the bacterial toxicity. Herein, column experiments were conducted to investigate the behavior of major ions under 10 and 200 mg/L multiple contaminations of graphene nanomaterials in agricultural and undisturbed soils, as well as the retention of the graphene nanomaterials in the soil and their effect on soil zeta potentials throughout the column. While these emerging contaminants are increasingly being released into soil, their potential impact on this medium and their effect on soil’s major chemical components (e.g., sulfate, nitrate, ammonia, and phosphate) have yet to be examined, as well as their relation with microbial toxicity. We stress that ammonium assimilation with a clear and short pathway is a promising method in future saline wastewater treatment and sustainable nitrogen management.Soils are facing new environmental contaminants, such as nanomaterials. As one prototypic microbe to form ammonium-assimilating biofilms, Psychrobacter aquimaris A4N01 plays key role in nutrient metabolism and microbiome construction. More than 80% of ammonium, total nitrogen and total phosphorus are removed and recovered into biomass, with more than 98% of COD removed from saline wastewater. We demonstrate that the microbiome removes ammonium through assimilation without reactive nitrogen intermediates and gaseous nitrogen emission, according to the functional gene abundance and nitrogen balance. We find one marine bacterium Psychrobacter aquimaris A4N01 with the ability to form sedimentary granular biofilms that can be engineered to construct an efficient ammonium-assimilating microbiome followed the bottom-up design. Here we propose microbial ammonium assimilation to achieve efficient nitrogen removal and recovery into biomass from saline wastewater without gaseous nitrogen release opposite to the conventional wastewater treatment.
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Although nitrogen management is vital for wastewater treatment, efficient strategies for nitrogen recovery and removal from saline wastewater remain challenging. Wastewater with high salinity is one of the major challenges for conventional wastewater treatment.