| 邹丽娜,徐婧婧,陈铮铮,原红红,袁峰,唐先进,赵科理,叶正钱.水旱轮作下钛石膏对土壤砷铅有效性的影响研究[J].农业环境科学学报,2021,40(4):774-781. |
| 水旱轮作下钛石膏对土壤砷铅有效性的影响研究 |
| Effect of titanium gypsum on the availability of arsenic and lead in agricultural soil under paddy-dryland rotation conditions |
| 投稿时间：2020-11-09 |
| DOI：10.11654/jaes.2020-1290 |
| 中文关键词: 钛石膏 砷 铅 有效性 水田 旱地 |
| 英文关键词: titanium gypsum arsenic lead availability paddy soil dryland soil |
| 基金项目:国家重点研发计划项目（2019YFC1803705） |
| 作者 | 单位 | E-mail | | 邹丽娜 | 浙江大学环境与资源学院, 土水资源与环境研究所, 浙江 杭州 310058 | | | 徐婧婧 | 浙江农林大学环境与资源学院, 浙江省土壤污染生物修复重点实验室, 浙江 临安 311300 | | | 陈铮铮 | 浙江大学环境与资源学院, 土水资源与环境研究所, 浙江 杭州 310058 | | | 原红红 | 浙江大学环境与资源学院, 土水资源与环境研究所, 浙江 杭州 310058 | | | 袁峰 | 浙江农林大学环境与资源学院, 浙江省土壤污染生物修复重点实验室, 浙江 临安 311300 | | | 唐先进 | 浙江大学环境与资源学院, 土水资源与环境研究所, 浙江 杭州 310058 | | | 赵科理 | 浙江农林大学环境与资源学院, 浙江省土壤污染生物修复重点实验室, 浙江 临安 311300 | kelizhao@zafu.edu.cn | | 叶正钱 | 浙江农林大学环境与资源学院, 浙江省土壤污染生物修复重点实验室, 浙江 临安 311300 | |
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| 中文摘要: |
| 通过模拟水旱轮作盆栽试验，研究了不同添加量（0.15%和0.30%）下实际钛石膏材料（ATG）和模拟钛石膏材料（二水硫酸钙和氧化铁按质量比7∶3和9∶1混合配制，分别为TG7和TG9）对砷（As）铅（Pb）复合污染土壤的钝化修复效果，并考察了钛石膏材料对青菜（旱地）和水稻（水田）积累As、Pb的影响。结果表明：钛石膏材料的添加使旱地土壤pH（5.22）降低了0.11~0.49个单位，水田土壤pH（6.35）降低了0.27~0.69个单位，但均未对作物产量产生影响。钛石膏材料并不能显著影响旱地土壤有效态As，但使青菜地上部As含量平均降低了39.2%；使水田土壤中的有效态As含量（11.96 mg·kg-1）平均下降了19.9%，同时使水稻糙米中的As含量平均下降28.9%。钛石膏材料显著降低了旱地和水田土壤中有效态Pb含量，分别平均下降12.8%和17.2%，同时使青菜地上部Pb含量平均降低32.5%，使水稻糙米中Pb含量平均降低21.9%。研究表明，钛石膏材料对水田条件下As、Pb复合污染的修复作用强于旱地条件，0.30%添加量的钝化修复效果优于0.15%添加量，且0.30%添加量的模拟钛石膏材料TG7对As、Pb复合污染农田土壤的修复效果最佳。 |
| 英文摘要: |
| In this study, a pot experiment simulating a paddy and dry crop rotation was conducted. The effect of different doses(0.15% and 0.30%) of actual titanium gypsum material(ATG) and simulated titanium gypsum material(prepared by mixing calcium sulfate dihydrate and iron oxide according to the mass ratios of 7:3 and 9:1, referred to respectively as TG7 and TG9) on the remediation of arsenic(As) and lead(Pb) co-contaminated soil was studied. The influence of titanium gypsum material on the accumulation of As and Pb in Brassica chinensis L.(dryland) and Oryza sativa L.(paddy) was also investigated. This study will provide the theoretical basis and technical support for the remediation of As-Pb co-contaminated soil. The results showed that the addition of titanium gypsum material reduced the dryland soil pH(5.22) by 0.11~0.49 units and the paddy soil pH(6.35) by 0.27~0.69 units; however, it had little effect on the yield of the two crops. The addition of titanium gypsum material had no significant effect on the available As in dryland soil, but it reduced the As content in the aboveground parts of B. chinensis L. by an average of 39.2%. The addition of titanium gypsum material reduced the available As content(11.96 mg·kg-1) in the paddy soil by an average of 19.9%. At the same time, the As content in brown rice decreased by 28.9% on average. Titanium gypsum material significantly reduced the available Pb in dryland and paddy soil by an average of 12.8% and 17.2%, respectively. It also reduced the Pb content in the aboveground parts of B. chinensis L. by 32.5% and the Pb content in brown rice by 21.9%. The titanium gypsum materials were more effective in paddy soil than in dryland soils, for As and Pb immobilization. Higher addition amounts(0.30%) of titanium gypsum materials were more effective than the lower addition amounts(0.15%). The most effective immobilization amendment for soil co-contaminated with As and Pb was 0.30% TG7. |
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