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当前位置: 首页 > 文章 > 石灰石和海泡石组配对水稻糙米重金属积累的影响 土壤学报 2014 (3) 555-563
Position: Home > Articles > EFFECTS OF COMBINED AMENDMENT( LIMESTONE + SEPIOLITE) ON HEAVY METAL ACCUMULATION IN BROWN RICE Acta Pedologica Sinica 2014 (3) 555-563

石灰石和海泡石组配对水稻糙米重金属积累的影响

作  者：
周歆;周航;曾敏;胡淼;杨文弢
单  位：
中南林业科技大学环境科学与工程研究所;浙江省杭州市植保土肥总站;中南林业科技大学环境科学与工程学院;江西理工大学外语外贸学院
关键词：
修复;水稻;重金属;组配改良剂;石灰石;海泡石
摘  要：
为了研究组配改良剂(石灰石+海泡石,LS)对于重金属Pb、Cd、Cu和Zn复合污染稻田的修复效果,在湘南某矿区附近稻田中进行了组配改良剂的田间试验。结果表明:施用0~1.8 kg m-2的组配改良剂LS使土壤pH和CEC显著增加,使土壤中Pb、Cd、Cu和Zn交换态含量显著降低。土壤Pb、Cd、Cu和Zn交换态含量的降低是pH升高,土壤胶体的CEC增加及土壤吸附能力增强的共同作用。施用组配改良剂LS显著降低了3个水稻品种(黄华占、丰优9号、Ⅱ优93)糙米中Pb、Cd和Cu的累积量,最大降幅分别为55.8%、66.9%、37.4%,而对糙米中Zn的含量没有明显影响。当LS施用量为1.8 kg m-2时,能使丰优9号糙米中Cd含量(0.195 mg kg-1)达到国家食品中污染物限量标准(0.20 mg kg-1)以下。土壤中交换态Pb、Cd和Cu含量的降低是糙米中重金属累积量减少的原因。土壤交换态Pb、Cd和Cu含量的对数值(lnC交换态)与其糙米中含量(lnC糙米)的对数值之间存在显著的线性相关关系。
译  名：
EFFECTS OF COMBINED AMENDMENT( LIMESTONE + SEPIOLITE) ON HEAVY METAL ACCUMULATION IN BROWN RICE
作  者：
Zhou Xin;Zhou Hang;Zeng Min;Hu Miao;Yang Wentao;Liu Li;Liao Bohan;Institute of Environment Science and Engineering,Central South University of Forestry and Technology;Hunan Bossco Huyi Environmentel Engineering Co. ,Ltd.;College of Bioscience and Technology,Hunan Agricultural University;
关键词：
Remediation;;Rice;;Heavy metal;;Combined amendment;;Limestone;;Sepiolite
摘  要：
In order to study the effects of applying combined amendment( prepared by mixing limestone and sepiolite at a mass ratio of 2∶ 1,LS) on remediation results in heavy metal contaminated paddy soils,a field experiment was conducted in a paddy soil near a mining area in southern Hunan,China. The experiment results indicated that applying 0 ~ 1. 8 kg m- 2of LS significantly increased soil pH and CEC,and decreased exchangeable contents of soil Pb,Cd,Cu and Zn. With increasing in applying amount of LS,the remediation results became more notable. The reduction of exchangeable Pb,Cd, Cu and Zn was an outcome of rising soil pH,CEC and soil colloid adsorption capacity due to addition of limestone and sepiolite. Meanwhile,applying LS resulted obviously in reducing contents of Pb,Cd and Cu in brown rice of the three tested rice varieties( Hanghuazhan,Fengyou 9,and II You 93 in Chinese system),and the maximum reduction of Pb,Cd and Cu contents in brown rice were 55. 8%,66. 9%,and 37. 4%,respectively. However,applying LS had no significant effects on Zn contents in brown rice. As a result of applying 1. 8 kg m- 2of LS to the paddy soil,the Cd content in brown rice of Fengyou 9 could be decreased to 0. 195 mg kg- 1,lower than the limits stipulated in the National Standard GB 2762-2012, Maximum Content of Contaminants in Food( 0. 20 mg kg- 1). The reduction of Pb,Cd and Cu accumulation in brown rice was due to LS reduced exchangeable contents of soil heavy metals,and there were significantly positive linear correlations between the exchangeable contents of Pb,Cd,Cu in soil and contents of Pb,Cd,Cu in brown rice in natural logarithm.

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