Yucheng Cao

TL;DR: It was found that most of the heavy metals existed in the oxizable and residual forms after pyrolysis, resulting in a significant reduction in their bioavailability, leading to a very low environmental risk of the biochar.

TL;DR: The co-pyrolysis technology provides a feasible method for the safe disposal of metal-contaminated sewage sludge in an attempt to minimize the environmental risk from potentially toxic metals after land application.

TL;DR: The results of principal component analysis and hierarchical clustering analysis indicate that marine aquaculture activities have enriched the surface sediments underneath mariculture rafts with Cu, Zn and Pb, possibly due to the accumulation of unconsumed fish feeds, fish excreta and antifouling paints.

TL;DR: Results demonstrated that CFL manufacturing activities resulted in THg accumulation in the hair of CFL workers, however, MeHg in hair were mainly affected by the sources of rice of the residents.

TL;DR: Taking into account the yield of and metal concentrations in the radish and corn plants and the contamination risks in soil, it is recommended that the continuous safe application period at an application of 7.5 t ha-1 year-1 of biochar should not exceed 15 years, and that of its precursor sewage sludge should not exceeding 17 years.

TL;DR: This review summarizes the characteristics of biochar (e.g., surface area, porosity, pH, surface charge, functional groups, and mineral components) and main mechanisms governing sorption of As, Cr, Cd, Pb, and Hg by biochar and includes competitive sorption mechanisms of co-existing metals.

TL;DR: The source and production of biochar is summarized, its research status in the removal of organic pollutants is pointed out, the relevant adsorption parameters are introduced, its regeneration methods are summarizes, its application of engineering is studied, and the development prospects are described.

TL;DR: In this article, an assessment of the leading disposal (volume reduction) and energy recovery routes such as anaerobic digestion, incineration, pyrolysis, gasification and enhanced digestion using microbial fuel cell along with their comparative evaluation, to measure their suitability for different sludge compositions and resources availability.

TL;DR: It was found that most of the heavy metals existed in the oxizable and residual forms after pyrolysis, resulting in a significant reduction in their bioavailability, leading to a very low environmental risk of the biochar.

TL;DR: In this article, most recent studies on biochar/hydrochar production, characterization and prospective utilizations are summarized, and the energy balance and economic flexibility of biochar production technology is also analyzed.