Weihua Zhang

TL;DR: Lead sorption capacity and mechanisms by sludge-derived biochar (SDBC) were investigated to determine if treatment of acid mine drainage containing metals with SDBC is feasible, and may suggest that the application ofSDBC is a feasible strategy for removing metal contaminants from acid solutions.

TL;DR: The surface characteristics of sludge-derived biochar (SDBC) made from three feedstocks of wastewater sludge under different pyrolysis temperatures were investigated in this paper, which showed that the sludge from Waste Water Treatment Plant (WWTP) with pure domestic wastewater influent and less mixed industrial wastewater produced the highest biochar yield, and these SDBC samples have the highest IEP and the most uniform charge distribution, compared with other sources.

TL;DR: Investigation of the potential risk of ethylenediaminetetraacetic acid-enhanced soil washing found that the metal removal efficiency was rather low, partially due to the significant Ca dissolution and strong bonding between metals and the soil as well as the insufficient EDTA dosage.

TL;DR: Results indicated the SDBC could effectively stabilize these metals, which was favored by elevated temperature and longer aging, but a long-term monitoring may be required for evaluating the potential leaching risks and bioavailability/toxicity of these immobilized and transformed species in theSDBC-amended soils.

TL;DR: The co-extraction of soil minerals and organic matter during chelant-enhanced flushing, which would alter both physical structure and chemical properties of the soils, is detrimental to future land use and deserves greater attention.