Publications by authors named "L Mandi"
Article Synopsis
- The study tests biochar-based substrates for their effectiveness in removing pollutants from wastewater, focusing on determining the best biochar concentration for large-scale filters like constructed wetlands.
- Preliminary lab tests using different concentrations of biochar (0%, 10%, 25%, and 50%) showed significant improvements in removing nitrogen, phosphorus, chemical oxygen demand, and total suspended solids in comparison to control filters.
- The best results for pollutant removal were achieved with 10% biochar, indicating that a lower concentration is both economically and environmentally beneficial for wastewater treatment systems.
Article Synopsis
- Cyanobacterial harmful algal blooms (CyanoHABs) pose risks to public health and freshwater ecosystems, prompting a study on their dynamics and the movement of microcystins (MCs) from Lalla Takerkoust reservoir to nearby farms.
- The research identified Microcystis and Synechococcus species as responsible for the blooms, with Microcystis producing significant levels of three MC variants, particularly MC-RR, while Synechococcus showed no toxin production.
- Analysis revealed a historical pattern of cyanobacterial proliferation and indicated a significant decrease in MC concentrations as one moves downstream from the reservoir, emphasizing the influence of environmental factors and the necessity for effective bloom management.
This paper evaluates the performance and potential of a full-scale hybrid multi-soil-layering (MSL) system for the treatment of domestic wastewater for landscape irrigation reuse. The system integrates a solar septic tank and sequential vertical flow MSL and horizontal flow MSL components with alternating layers of gravel and soil-based material. It operates at a hydraulic loading rate of 250 L/m/day.
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- Eutrophication has caused toxic cyanobacterial blooms in the Lalla Takerkoust reservoir in Morocco, prompting a study to assess the effectiveness of Multi-Soil-Layering (MSL) ecotechnology in removing these blooms.
- Two MSL setups using different types of soil (sandy for MSL1 and clayey for MSL2) were tested, significantly lowering cyanobacterial concentrations and eliminating organic matter levels by over 95%.
- MSL1 demonstrated improved microcystin (MC) removal from 52% to 99%, while MSL2 began at 90% reduction but fluctuated before stabilizing at 86%, indicating both systems effectively tackle cyanobacterial contamination.
Microcystins (MCs) constitute a significant threat to human and environmental health, urging the development of effective removal methods for these toxins. In this review, we explore the potential of MC-degrading bacteria as a solution for the removal of MCs from water. The review insights into the mechanisms of action employed by these bacteria, elucidating their ability to degrade and thus remove MCs.
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