School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough, UK.
U.F.R. de Langues Etrangères, Artois University, Arras Cedex, France.
Int J Phytoremediation. 2023;25(7):851-867. doi: 10.1080/15226514.2022.2115005. Epub 2022 Aug 26.
The unsustainable exploitation of water resources and growing salinization impacting China's Beijing-Tianjin-Hebei (Jing-Jin-Ji) agglomeration threatens the region's economic growth and drives the exploration of alternative resources. The region's industries face a financial burden due to increasing constraints on water exploitation and discharge regulations. These have resulted in increased industrial salt concentration rejections/discharges, meanwhile, constructed wetlands (CWs), deployed as a perfunctory receptacle for industrial effluents in the region, are underexploited for treating/removing salts. Also, halophytic plants local to the region have promising chloride uptake (60.6 g/kg and 256.0 g/kg of plant dry weight) and can reduce water conductivity by 40%. Exploitation of CWs, using local halophytes has not been explored for phytodesalination purposes in the region. Hence, this study analyses the water resource and salinization crisis in the agglomeration and further evaluates workable potential and critical technical considerations for using local halophytes in CWs to treat industrial salt-laden effluents. While acknowledging this intervention for removing industrial effluent salt may not meet compliance in the region, effluent post-phytodesalination presents opportunities for industries to meet regulatory stipulations on water reuse rates. Furthermore, such effluent may be used for irrigation and can ameliorate the salinization and groundwater exploitation crisis as a cleaner recharge source.
水资源的不可持续开发和日益严重的盐渍化问题影响了中国京津冀城市群，威胁到该地区的经济增长，并促使人们探索替代资源。由于水资源开采和排放规定的限制日益增加，该地区的工业面临着财政负担。这导致工业盐浓度的拒绝/排放增加，同时，该地区作为工业废水的敷衍处理场所的人工湿地（CWs）也没有得到充分利用来处理/去除盐分。此外，该地区的盐生植物具有很高的氯化物吸收能力（植物干重的 60.6 g/kg 和 256.0 g/kg），可将水的电导率降低 40%。该地区尚未探索利用 CWs 和当地盐生植物进行植物淡化以解决盐分问题。因此，本研究分析了城市群的水资源和盐渍化危机，并进一步评估了利用 CWs 中的当地盐生植物处理工业含盐废水的可行潜力和关键技术考虑因素。虽然承认这种干预措施可能无法满足该地区去除工业废水盐分的要求，但废水经过植物淡化后，为工业满足有关水再利用率的规定提供了机会。此外，这种废水可用于灌溉，并可改善盐渍化和地下水开采危机，成为更清洁的补给源。
