期刊论文

Effects of rice husk ash on Cd and As bioavailability in paddy soil and their accumulation in brown rice

Gu, J.

中文

环境科学学报

0253-2468

2020

40

7

2581-2588

10.13671/j.hjkxxb.2020.0045

湖南省自然科学基金（No.2018JJ3880）； 国家自然科学基金青年科学基金（No.41907126）； 中南林业科技大学***科研启动基金（No.2019YJ041）；

本校为第一且通讯机构

为研究富硅材料谷壳灰(HA)对稻田土壤Cd、As生物有效性及糙米中Cd、As累积的影响,以稻壳为原料制备中性HA(总硅量6.26×10~5 mg·kg~(-1)), 开展水稻盆栽试验.HA按质量比设置4个添加水平(0、0.5%、1%、2%), 种植3种水稻(黄华占、湘晚籼13、隆优4945). 研究结果表明: ①在土壤Cd总量为2.30 mg·kg~(-1)、As总量为90.45 mg·kg~(-1)的复合污染土壤中,HA施用后,与对照相比,土壤Cd的TCLP提取态、CaCl2提取态及酸可提取态含量呈现不同程度的降低,分别降低了7.8%~ 18.7%、7.4%~ 18.7%、0.9%~ 16.7%;土壤As的交换态和TCLP提取态含量也有降低,分别降低了6.1%~ 47.1%、4.3%~ 26.7%.②HA施用可促进土壤中酸...

Rice pot experiments were conducted with application of silicon-rich material husk ash HA (total silicon concentration 6.26×105 mg•kg-1) to study the influences of HA on cadmium (Cd) and arsenic (As) bioavailability and their accumulation in brown rice in complexly contaminated paddy soil with Cd (2.30 mg•kg-1) and As (90.45 mg•kg-1). HA was set at four levels (0, 0.5%, 1%, 2%, W/W) based on the quality ratio, and three genotypes of rice were planted (Huanghuazhan, Xiangwanxian 13, Longyou 4945). The results showed that: ① Compared with th...