Sulfur-modified biochar, preparation method thereof, recyclable sulfur-modified biochar material and application of recyclable sulfur-modified biochar material

The invention discloses sulfur modified biochar, a preparation method thereof, a recyclable sulfur modified biochar material and application. The preparation method of the sulfur-modified biochar comprises the following steps: modifying biochar by using a sulfur modification liquid which is obtained by reacting a sulfide containing CS2 with a hydroxide of an alkali metal. The modified sulfur-modified biochar has strong heavy metal and organic matter removal capacity, the purpose of continuously reducing heavy metal and organic matter in pyrite sediment can be achieved, the capacity of existing biochar for removing environmental pollutants is further improved, and the method for using the sulfur-modified biochar and derivative products is simple, convenient and is convenient to popularize. 本发明公开了一种硫改性生物炭及其制备方法、可回收硫改性生物炭材料及应用。该硫改性生物炭的制备方法包括：利用硫修饰液对生物炭进行修饰，其中，硫修饰液由含有CS2的硫化物与碱金属的氢氧化物进行反应后得到。进行修饰后的硫改性生物炭具有很强的重金属和有机物去除能力，能够达到持续降低硫铁矿沉积物中重金属和有机物的目的，进而提高现有生物炭去除环境污染物的能力，并且使用该硫改性生物炭以及衍生产品的方法简单、方便，便于推广。