Arunkumar Thirugnanasambantham, Suh Younghoon, Pandit Tushar Prashant, Patra Anindya Sundar, Lee Sang Joon
Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, 37673, Gyeongbuk, Republic of Korea.
Environ Sci Pollut Res Int. 2024 Mar 2. doi: 10.1007/s11356-024-32732-0.
Solar desalination provides a sustainable and eco-friendly solution for purifying wastewater, addressing environmental challenges associated with wastewater treatment. This study focuses on the purification of inorganic contaminants from laboratory chemical wastewater (ICWW) using a spherical solar still (SSS). To enhance the evaporation rate and overcome the impact of heavy metals on absorption efficiency, a carbonized balsa wood (CBW) solar evaporator was employed. Balsa wood pieces, carbonized at 250 °C for 15 min, were arranged in a SSS configuration. The CBW-integrated SSS demonstrated a remarkable freshwater productivity of 2.33 L/m for ICWW, surpassing the conventional SSS, which produced only 1.5 L/m. The presence of heavy metal ions (Na, Ca, K, and Mg) in ICWW significantly affected the evaporation rate, and the CBW solar evaporator exhibited an impressive removal efficiency of approximately 99%. Water quality parameters, including pH and chemical oxygen demand (COD), were investigated before and after treatment. The CBW-integrated SSS achieved an outstanding COD removal efficiency of about 99.77%, reducing the COD level from 229.51 to 0.521 mg/L. These results underscore the efficacy of the proposed solar desalination system in purifying ICWW, offering a promising approach to address environmental concerns associated with wastewater treatment.
太阳能海水淡化提供了一种可持续且环保的废水净化解决方案，可应对与废水处理相关的环境挑战。本研究聚焦于使用球形太阳能蒸馏器（SSS）从实验室化学废水（ICWW）中去除无机污染物。为提高蒸发速率并克服重金属对吸收效率的影响，采用了碳化轻木（CBW）太阳能蒸发器。将在250°C下碳化15分钟的轻木片以SSS结构排列。集成CBW的SSS对ICWW的淡水生产率达到了2.33升/平方米，显著超过了传统SSS，后者的淡水生产率仅为1.5升/平方米。ICWW中重金属离子（钠、钙、钾和镁）的存在显著影响了蒸发速率，而CBW太阳能蒸发器的去除效率高达约99%。对处理前后的水质参数进行了研究，包括pH值和化学需氧量（COD）。集成CBW的SSS实现了约99.77%的出色COD去除效率，将COD水平从229.51毫克/升降至0.521毫克/升。这些结果强调了所提出的太阳能海水淡化系统在净化ICWW方面的有效性，为解决与废水处理相关的环境问题提供了一种有前景的方法。
