Wen Qin, Jingru Yang, Changyang Zhang, Yang Song, Jin Jiang, Jun Ma
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The role of biochar in algal source water treatment: Algal cells integrity and N-Nitrosodimethylamine (NDMA) formation potential
The effects of unmodified and modified biochars (BC) made by tea (TBC), coconut shell (NBC), corn straw (SBC), and orange peel (OBC) on algae removal efficiency and NDMA formation potential (NDMA-FP) in algae-containing water were investigated. The algae removals (12%-45%) and NDMA-FP reductions (1%-20%) were enhanced by unmodified BC, indicating that the potential application of BC in algae removal and NDMA formation risk control. Cu(Ⅰ/Ⅱ)-modified BC (Cu(Ⅰ/Ⅱ)-BC) significantly promoted algae removal efficiency (up to 80%) with the most significant physical membrane damage to Microcystis aeruginosa (85-99%), leading to an increase in NDMA-FP (21%-31%). In contrast, Fe(Ⅲ)-modified BC (Fe(Ⅲ)-BC) not only exhibited superior algae removal performance (5%) with minimal physical damage (membrane damage rate < 15%), but also provided better control over NDMA-FP (2%-23%). Fe(Ⅲ)-BC performed strong adsorption capacity for AOM, with an adsorption efficiency of up to 86%. NDMA-FP control in algae-containing water by BC depended on its physical damage to cells and AOM adsorption. A positive correlation was observed between membrane damage and AOM adsorption. These findings support optimizing algal removal and NDMA-FP control in drinking water treatment.
期刊介绍:
The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.