| Although the large-scale livestock and poultry breeding has brought magnificent economic benefits for
the society, it also caused a series of environmental pollution problems. The preparation of biochar from livestock manure
can not only achieve the goal of manure reduction and harmlessness, reduce environmental pollution, but also attain the
purpose of waste utilization and bring environmental and economic benefits. Manure-based biochar is widely used in the
field of environmental remediation due to its unique physicochemical properties, low cost and environmental friendliness,
which can be used to adsorb/immobilize pollutants in water and soil. The study summarizes the effects of pyrolysis
temperature and modification conditions（acid, alkali, oxidant and metal oxide modification）on the physicochemical
properties of manure-based biochar. The chemical forms and leaching behavior of heavy metals in manure-based biochar
were deeply studied, and a variety of pollution technology evaluation methods were used to evaluate the environmental
risks of manure-based biochar. Finally, the study focused on the removal effect and mechanism of manure-based biochar
on heavy metals, organic pollutants, antibiotics, nitrogen and phosphorus in wastewater as well as heavy metals and
organic pollutants in Soil. The physicochemical properties of manure-based biochar depend on its preparation process, and its adsorption performance largely depends on its physicochemical properties. Manure-based biochar has a broad
application prospect in environmental remediation, but there are still some problems and challenges to be solved. |
