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目的：探索有效地从载体上分离钉螺的阻／灭螺工程技术的实施方法和理论依据。方法：采用负重 法、浸泡法和离心法，研究噪声、照度、色彩、离心力、pH及不同盐溶液等物理、化学因素对钉螺吸附力的影响。结果：噪声为110分贝（db）时，钉螺100％脱落。pH由低到高时，脱落率呈类“U”型变化，pH超过9．7时，微小的变化即能使脱离率大幅度急剧增长。离心率达823×10－5牛顿（N）时，脱落率为100％。照度小于4146勒克司（Lx）时，钉螺脱落率升高，在16587Lx强光照射下，5分钟即100％脱落。含NH的盐溶液对钉螺吸附能力影响较小，而在含Na＋和Ca2＋的盐溶液中脱落率较高，两者有显著性差异。红色光照下，钉螺脱离率高，与黄、蓝、绿及无色相比有十分显著性差异。结论：以上结果表明钉螺的吸附能力与环境密切相关，改变其赖以生存的环境，即可改变其吸附能力。在水利阻／灭螺工程中形成高速旋转的水流，以增大离心力和噪声，增加光照强度，以及红色光照在分离和沉降池中的运用，均可提高水利阻／灭螺工程的效果。
OBJECTIVE: To explore the implementation and theoretical basis of the resistance / snail project effectively separating snails from the carrier. Methods: The effects of noise, illumination, color, centrifugal force, pH and salt and other physical and chemical factors on the adsorption capacity of Oncomelania snails were studied by the methods of weight-bearing, immersion and centrifugation. Results: When the noise was 110 db, the snails dropped 100%. When the pH is from low to high, the exfoliation rate changes in a “U” shape. When the pH exceeds 9.7, a slight change can rapidly increase the detachment rate. When the eccentricity reached 823 × 10-5 Newtons (N), the shedding rate was 100%. When the illumination was less than 4146 Lx, the rate of snail excretion increased and 100% exfoliated in 5 minutes at 16587 Lx. The salt solution containing NH had little effect on the adsorption capacity of snails and the rate of exfoliation in salt solution containing Na + and Ca2 + was significantly different. Red light, snail detachment rate is high, with yellow, blue, green and colorless compared to a very significant difference. Conclusion: The above results show that Snail adsorption capacity is closely related to the environment, changing its survival environment, you can change its adsorption capacity. The formation of a high-speed rotating water flow in the water resistance / snail project to increase centrifugal force and noise, increase light intensity, and use of red light in the separation and sedimentation tanks can both improve the effectiveness of the water resistance / snail project.