生态环境学报 ›› 2024, Vol. 33 ›› Issue (2): 249-260.DOI: 10.16258/j.cnki.1674-5906.2024.02.009

• 研究论文【环境科学】 • 上一篇    下一篇

华南滨海小流域地下水中PPCPs的分布、来源及影响因素——以珠海市唐家湾镇为例

梁贝竹1(), 陈建耀1,*, 杨再智1, 张鹏程1, 任坤1, 梁作兵1, 杨晨晨1, 吴洁珊2   

  1. 1.中山大学地理科学与规划学院,广东 广州 510006
    2.拱北海关技术中心,广东 珠海 519020
  • 收稿日期:2023-08-31 出版日期:2024-02-18 发布日期:2024-04-03
  • 通讯作者: *陈建耀。
  • 作者简介:梁贝竹(2001年生),女,硕士研究生,研究方向为流域水环境。E-mail: liangbzh3@mail2.sysu.edu.cn
  • 基金资助:
    国家重点研发项目(2023YFC3709002);国家自然科学基金项目(41977171)

Spatial Pattern and Sources of PPCPs in Groundwater and Relevant Influencing Factors in a Coastal Watershed in South China: A Case Study in Tangjiawan Town of Zhuhai, Guangdong Province

LIANG Beizhu1(), CHEN Jianyao1,*, YANG Zaizhi1, ZHANG Pengcheng1, REN Kun1, LIANG Zuobing1, YANG Chenchen1, WU Jieshan2   

  1. 1. School of Geography and Planning, Sun Yat-sen University, Guangzhou 510006, P. R. China
    2. Gongbei Customs District P. R. China Technical Center, Zhuhai 519020, P. R. China
  • Received:2023-08-31 Online:2024-02-18 Published:2024-04-03

摘要:

药物和个人护理用品(Pharmaceutical and Personal Care Products,PPCPs)是在环境中长期存在并对人类乃至整个生态系统的健康造成威胁的两类化学消费品。珠江三角洲流域PPCPs的检出水平总体较高,沿海地区地下水中的PPCPs污染有待进一步探究。于2021年9月在珠海市唐家湾镇采集了16个地下水样本,使用LC-MS/MS分析技术对21种PPCPs进行检测,使用数理统计方法和相关性分析对研究区地下水中PPCPs浓度特征和污染来源进行解析,并结合地下水化学特征及统计分析对其影响因素进行探究,旨在为滨海地区地下水的PPCPs特征分析提供案例依据。研究发现,1)研究区地下水呈弱酸至弱碱性,水化学类型多属于HCO3-Ca型,沿地下水流方向受人为污染的影响越来越显著。2)研究区地下水中检测到6种PPCPs,平均质量浓度和检出率分别为:磺胺甲恶唑(5.51 ng∙L−1,81%)、磺胺甲基嘧啶(1.18 ng∙L−1,100%)、磺胺二甲基嘧啶(0.168 ng∙L−1,25%)、卡马西平(35.7 ng∙L−1,94%)、咖啡因(110 ng∙L−1,100%)、西马特罗(0.100 ng∙L−1,6%);磺胺类化合物和卡马西平从补给区到排泄区整体污染情况加重,存在一定累积效应,而咖啡因无明显的空间分布规律;可以将卡马西平视作研究区内PPCPs总体污染的潜在标志物。3)研究区地下水PPCPs属于农业和城镇活动的混合来源;磺胺二甲基嘧啶与水温呈显著正相关(P<0.05),与代谢菌群的繁殖和吸附过程有关;磺胺甲基嘧啶和咖啡因均与溶解氧呈显著负相关(P <0.05),与化粪池污水输入有关。综上所述,研究区地下水受到人类活动污染的程度较高,农业和城镇活动将大量PPCPs引入到地下水当中。

关键词: 地下水, PPCPs, 来源, 空间分布, 滨海小流域, 华南地区

Abstract:

Pharmaceutical and Personal Care Products (PPCPs) pose a threat to the health of human beings and whole ecosystem due to their long-term existence in the environment. The concentrations of PPCPs in the Pearl River Delta Basin are generally high, and few studies have been carried out for the PPCPs in groundwater in coastal areas. Sixteen groundwater samples in Tangjiawan Town, Zhuhai City were collected in September 2021, with PPCPs components analyzed by LC-MS/MS. Spatial pattern and sources of PPCPs in groundwater were identified by using statistical approaches, and the influencing factors were recognized by hydrochemical characteristics analysis. The results showed that: 1) The groundwater in the study area was weakly acidic or alkaline, and could be mostly classified as HCO3-Ca type, with an increasing influence of anthropogenic pollutants following the groundwater flow from the recharge area to the discharge area. 2) Six compounds of PPCPs were detected in groundwater, and the average concentration and detection rate were given as follows: 5.51 ng∙L−1, 81% for sulfamethoxazole, 1.18 ng∙L−1, 100% for sulfamerazine, 0.168 ng∙L−1, 25% for sulfamethazine, 35.7 ng∙L−1, 94% for carbamazepine, 110 ng∙L−1, 100% for caffeine, and 0.100 ng∙L−1, 6% for cimatrol, respectively. The concentrations of sulfonamides and carbamazepine increased generally from the recharge area to the discharge area with a cumulative trend, and carbamazepine could be considered as a potential marker of PPCPs contamination in the study area, while no spatial pattern was found for caffeine. 3) Agricultural pesticides and human waste were mixed and contributed to PPCPs in groundwater. There was a significant positive correlation between sulfamethazine and temperature (P<0.05), attributing to the propagation of metabolic bacteria and adsorption process. Both sulfamerazine and caffeine were significantly negatively correlated with dissolved oxygen (P<0.05), which was closely related to the leakage of septic tank to the aquifer. The results can be used for the groundwater protection in the study area, and provide scientific base for managing groundwater resources.

Key words: groundwater, PPCPs, sources, spatial pattern, coastal watershed, south China

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