Interdisciplinary Practical Activity for Developing Scientific Inquiry and Engineering Practice Abilities in Junior High School Chemistry: Making Modular Simple Water Purifier
PENG Xiao-Ning, LI Yuan-Hui, MA Rui-Ying, LI Yi-Ai, WU Can-Feng, LI Shuo, KANG Wei-Hua, LI Ya-Lin**
Hainan Micro-city Future School, Chengmai 571900, China
Abstract Aiming at the problems of traditional self-made water purifiers in junior high school chemistry teaching, such as slow filtration speed, difficult recovery of filter materials, and poor teaching adaptability, this paper proposes a modular simple water purifier scheme. With a multi-layer milk powder box as the main body of the water purification box, combined with a gas-liquid dual-purpose pump and a 180°symmetric eccentric-hole rubber gasket, a layered detachable system is constructed by encapsulating pebbles, quartz sand, activated carbon, and medical absorbent cotton with a sink filter screen. The cost is controlled within 20 yuan. Experimental results show that: the average water production rate of the modular water purifier is 285.77 mL/min, which is 12.5 times higher than that of the traditional device (22.87 mL/min), and it can complete the filtration of 200 mL of sewage in 40 seconds; the turbidity removal rate reaches 98.0% (reducing from 91.1 NTU to 1.8 NTU), it can remove odors, and the pH is maintained at 6.7. The filter material recovery rate of the device exceeds 90%, and it has a compact size (with a diameter of 7.3 cm and a height of 20 cm), which is suitable for classroom and home practice. It can help students understand the logic of “coarse filtration-fine filtration-adsorption” and cultivate their abilities in scientific inquiry and engineering practice.
PENG Xiao-Ning, LI Yuan-Hui, MA Rui-Ying, LI Yi-Ai, WU Can-Feng, LI Shuo, KANG Wei-Hua, LI Ya-Lin. Interdisciplinary Practical Activity for Developing Scientific Inquiry and Engineering Practice Abilities in Junior High School Chemistry: Making Modular Simple Water Purifier[J]. Chinese Journal of Chemical Education, 2026, 47(1): 102-107.
