HAP/CaO<sub>2</sub>复配稳定化黑臭底泥中重金属效果及生态风险评价

崔壮; 李朝祥; 王宏杰; 王福鹏; 董文艺; 王锋

doi:10.13205/j.hjgc.202505015

HAP/CaO₂复配稳定化黑臭底泥中重金属效果及生态风险评价

doi: 10.13205/j.hjgc.202505015

崔壮¹,
李朝祥²,
王宏杰^2,3,4,
王福鹏²,
董文艺^2,3,4,
王锋^2,5, ,

1. 中国市政工程东北设计研究总院有限公司, 长春 130021;
2. 哈尔滨工业大学(深圳) 土木与环境工程学院, 广东深圳 518055;
3. 深圳市水资源利用与环境污染控制重点实验室, 广东深圳 518055;
4. 城市水资源与水环境国家重点实验室(哈尔滨工业大学), 哈尔滨 150090;
5. 哈尔滨工业大学(深圳)经济管理学院, 广东深圳 518055

基金项目:

深圳市科技创新委员会可持续发展专项（KCXFZ202002011006362）；中国市政工程东北设计研究总院有限公司科技研发项目“基于CaO2组合药剂的河道污染底泥原位物化/生物耦合处理技术研究”。

详细信息

作者简介:
崔壮（1982-），男，高级工程师，主要研究方向为河道综合整治。447320131@qq.com

通讯作者:
王锋（1992-），男，博士，主要研究方向为河道污染底泥处理与修复。tif.wang@foxmail.com

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出版历程
- 收稿日期: 2024-03-01
- 录用日期: 2024-05-05
- 修回日期: 2024-04-23
- 网络出版日期: 2025-09-11

Effects of HAP/CaO₂ compound on stabilizing heavy metals in black-odor sediments and ecological risk assessment

CUI Zhuang¹,
LI Chaoxiang²,
WANG Hongjie^2,3,4,
WANG Fupeng²,
DONG Wenyi^2,3,4,
WANG Feng^{2,5
, ,}

1. China Northeast Municipal Engineering Design and Research Institute Co., Ltd., Changchun 130021, China;
2. School of Civil and Environmental Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China;
3. Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control, Shenzhen 518055, China;
4. State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology), Harbin 150090, China;
5. School of Economics and Management, Harbin Institute of Technology Shenzhen, Shenzhen 518055, China

摘要

摘要: 过氧化钙（CaO₂）可有效消除底泥黑臭，但会导致底泥中部分的重金属脱稳而释放，产生潜在的生态风险。研究提出羟基磷灰石（HAP）复配CaO₂（HAP/CaO₂）的方法，以期达到同时消除底泥黑臭、稳定重金属的多重效果。结果表明：在HAP/CaO₂最优投加比例（3∶1）下，可以有效消除底泥黑臭，其中底泥酸可挥发性硫化物（AVS）去除率可达到95%左右，氧化还原电位（ORP）逐渐上升至14.2 mV，总有机碳（TOC）下降约0.6%。同时，多种重金属达到稳定化，Ni、Cr、Pb的残渣态占比分别增加了约16.9%、26.7%和21.9%，浸出浓度分别降至1.0，1.5，1.0 mg/L以下，达到SZDB/Z 236—2017《河湖污染沉淀物处理厂出水处置技术规范》中最严格的标准（Ⅰ级）。而且修复后底泥无生态风险，苦草的株高、根长以及鲜重分别增加了80%、15.5%和18.7%，铜锈环棱螺的死亡率降低了约5%，同时未对底泥中的微生物群落结构产生显著影响。该研究可为受重金属污染黑臭底泥的治理提供更有效、安全的技术方法。
- 黑臭底泥 /
- 重金属 /
- HAP/CaO₂复配 /
- 稳定化 /
- 生态风险
Abstract: Calcium peroxide （CaO₂） can effectively eliminate the black-odor of the sediment， but it can lead to the release of some heavy metals in the sediment by destabilization， resulting in potential ecological risks. To achieve the multiple effects of simultaneously eliminating the black-odor of the sediment and stabilizing heavy metals， this study develops a method for sediment remediation using hydroxyapatite and calcium peroxide （HAP/CaO₂）. The results showed that the dosing HAP/CaO₂ at a ratio of 3∶1 could be added to the sediment to effectively eliminate the blackness and odor of the sediment， improve the redox state and remove organic pollutants. The removal rate of acid volatile sulfide （AVS） reached about 95%， the oxidation-reduction potential （ORP） increased to 14.2 mV， and the total organic carbon （TOC） decreased by about 0.6%. Meanwhile， a variety of heavy metals were stabilized， the residual fraction of Ni， Cr， and Pb increased by about 16.9%， 26.7%， and 21.9%， respectively， and the leaching concentration decreased to below 1.0 mg/L， 1.5 mg/L， and 1.0 mg/L， respectively， complying with the stringent Technical Specification for Output Disposal of Contaminated Sediment Treatment Plant of River And Lake （SZDB/Z 236—2017）（Class I）. Moreover， there was no ecological risk in the remediated sediment， and the plant height， root length， and fresh weight of Vallisneria natans increased by 80%， 15.5%， and 18.7%， respectively， and the mortality rate of the Bellamya aeruginosa decreased by about 5%. The microbial community structure of the treated sediment did not change significantly， and Proteobacteria， Firmicutes， and Desulfobacta were always the dominant bacterium groups. This study offers an effective and safe method for treating black-odor sediment contaminated by heavy metals.
- black-odor sediment /
- heavy metals /
- HAP/CaO₂ compound /
- stabilization /
- ecological risks

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