IISER Mohali, Knowledge city, Sector 81, SAS Nagar, Manauli PO 140306

Application of nanoparticle-contaminated wastewater and biosolids in soil: Fate and impacts on human health

Dr. Divya Singh (Faculty Candidate, National Postdoctoral fellow, Department of Civil Engineering, IIT Roorkee, India)

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Location Online
Abstract:By 2050, four billion people will live in countries with limited water resources, necessitating the reuse of wastewater. Wastewater irrigation and biosolids application in agricultural soil is a common practice in developed and developing countries. Biosolids are organic matter recovered from a sewage treatment process and widely used as green biofertilizers/conditioners in agricultural soil. A country like India is known for utilizing around 80% of biosolids for agricultural land applications. During their treatment, the wastewater and biosolids may accumulate various organic and inorganic contaminants, which may ultimately be released into the environment. The nanoparticles (NPs) are one such example of an emerging contaminant in recycled water and biosolids, which raises the concern about potential toxicity and risk towards human health. Studies in the past decades have identified varying concentration range of metal and metal oxide NPs in biosolids and wastewater effluent (more than 1600+ products are present in the market and 2500+ on the online database). Chances are high, along with nutrients the biosolid-amendments and wastewater will bring NPs in agricultural soil resulting in slow accumulation in soil and edible plants. In this presentation, I will discuss (1) the reuse potential of wastewater and biosolids containing a single and a mixture of NPs for agricultural application (2) human health risks associated with such practice. In the first part, I will address the short-term (seed germination) and long-term (full-scale growth) impact of NPs on edible plants exposed to a single and binary mixture of NPs. Our study suggested that the NPs uptake and toxicity in plants depend on the NP properties (e.g., charge and size) and their application mode. In the second part, I will discuss the human health risk associated with the intake of NPs contaminated edible plants which are grown in wastewater irrigated and biosolid-amended soil. Furthermore, I will also discuss my ongoing projects, wherein we are trying to understand the suitability of nano-based technology for water treatment and associated environmental risks. Towards the end, I will talk about my future scientific goal of developing low-cost, eco-friendly, and efficient methods for the removal of emerging contaminants from wastewater, surface water, and soil. Through this work, the idea is to minimize human health risks and promote sustainable agriculture practice.

Meeting ID: 972 4375 9870
Passcode: 739293
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