期刊论文

Effects of biochar on the arsenic and mineral transformation in the reduction process of As(Ⅲ)-adsorbed ferrihydrite

中文

环境科学学报

0253-2468

2021

41

9

3497-3512

10.13671/j.hjkxxb.2021.0045

No.42177392:国家自然科学基金 No.41771512:国家自然科学基金

本校为其他机构

生物炭的施用对土壤铁(氢)氧化物还原、砷(As)的形态转化有重要作用,极大地影响了As的环境行为.本文研究了生物炭/ AQDS(蒽醌-2,6-二磺酸盐)对含As(Ⅲ)水铁矿化学还原和异化还原的影响,探索了由此产生的非生物和生物过程中Fe和As的形态转化及次生矿物的形成.结果表明,生物炭和AQDS的添加可以促进水铁矿的化学还原和As(Ⅲ)的化学氧化,AQDS促进水铁矿化学还原和As释放的能力强,生物炭促进As形态转化的能力强;生物组在添加Shewanella oneidensis MR-1后发现,生物炭和AQDS的添加可以促进Fe(Ⅱ)的生成,AQDS的添加促进Fe(Ⅱ)的生成、As形态转化和释放的能力要高于生物炭.EEM结果表明,生物炭产生的DOM可...

Biochar plays an important role in the reduction of iron (hydr)oxide and the transformation of arsenic (As) in soils, greatly affects the environmental behavior of As. The effects of biochar and anthraquinone-2, 6- disulphonate (AQDS) on the process of As(Ⅲ)-adsorbed ferrihydrite chemical and microbial reduction were studied. The behavior of Fe and As and the production of secondary minerals in the abiotic and biological processes were explored. Results showed that the addition of biochar and AQDS can promote the chemical reduction of ferrihyd...