生物炭吸附重金属污染物的研究进展

生物炭作为新型吸附剂,其物理化学特性以及其对环境中的重金属污染物的吸附固定被广泛研究。本文主要对生物炭的表征、特性以及其对重金属污染物的吸附固定的机理研究进展进行综述,并扼要对生物炭的研究方向进行了展望,为未来生物炭的应用提供一定的思路。通过文献总结,我们发现重金属在生物炭上的吸附机理的研究仍然存在矛盾之处;生物炭本身重金属毒性的释放研究是未来生物炭还田应用的研究方向;利用化学手段对生物炭进行化学修饰,以提高其吸附的有效性和针对性是在节能环保的前提下,未来生物炭发展的新方向。

Review of sorption of heavy metal contaminant on biochar

Biochar is a new sorbent, which attracts more attention on the research of their physico-chemi-cal characteristics and the sorption and immobilization of the heavy metal contaminant on the biochar. In this paper,the characteristic of biochar and the sorption and immobilization mechanism of heavy metal con-taminant on the biochar are reviewed. In addition,the future study on biochar is prospected,so as to pro-vide perspectives on applications of the biochar. After summarizing the previous literatures, we have found that contradiction still exists in the sorption mechanism of the heavy metals on the biochar. The heavy met-al-released research of the biochar-self toxicity and chemical modified biochar will become the new direc-tion of the biochar research in the future. The research of the chemical modified biochar would improve the effectiveness and pertinence of biochar sorption capacity.