Early‑warning for hydrogen sulfide leakage in factories, dedicated sensors monitor toxic gas concentrations.
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Early‑warning for hydrogen sulfide leakage in factories, dedicated

 sensors monitor toxic gas concentrations.

It is reported that an illegal chemical waste‑dumping incident occurred on January 31 in Shunwang Sub‑district, Zhucheng City, Shandong Province, claiming the lives of four poisoned people. Persons held responsible have been taken into police custody. Hazardous waste transported from elsewhere was dumped into sewage pipelines and spread, with toxic gases volatilizing and escaping from the sewer system and causing human poisoning. Despite full‑scale emergency treatment, four poisoned victims died. Other patients with poisoning symptoms are out of life‑threatening danger and under hospital observation. According to the preliminary judgment of the medical team, the toxic substance is highly‑toxic hydrogen sulfide. Once hydrogen sulfide reaches a certain concentration, even short‑term inhalation can cause severe harm to the human body. Two medical staff developed mild poisoning symptoms while rescuing poisoned local residents.

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According to updates, on‑site cleanup and decontamination of hazardous chemical waste have been completed. Rainwater pipelines on both sides of roads at the accident site have been thoroughly cleaned. Chemical waste, storage tanks and contaminated soil inside the abandoned plant involved in the incident have all been removed. Following expert assessment from the Shandong Provincial Department of Ecology and Environment and repeated testing with professional equipment, all air quality indicators in the area have returned to normal.
Hydrogen sulfide is an acutely lethal toxic gas at room temperature. Even low‑level exposure can harm the eyes, respiratory system and nervous system. Inhalation of a small amount of high‑concentration hydrogen sulfide may lead to rapid death.

Shenzhen Wuliang Sensor Technology Co., Ltd. supplies industrial‑grade electrochemical gas sensors manufactured by DDS of the United Kingdom. The product range covers O₂, CO, H₂S, H₂, NO, NO₂, NH₃, Cl₂, SO₂, ETO and other toxic gases, widely deployed in coal mining, petroleum, chemical, steel, municipal and other industries.

image.pngThe chemical industry is characterized by abundant toxic and hazardous gases and carries extremely high safety risks. During product processing, harmful gases such as carbon monoxide, sulfur dioxide, hydrogen sulfide and nitrogen oxides, as well as toxic organic vapors including benzene, aldehydes and ketones are generated, posing threats to production safety and environmental protection. Therefore, chemical enterprises shall prioritize accident prevention in production operations, avoid leakage and fugitive emissions, and implement effective waste‑gas recovery and comprehensive utilization. For production environments in the chemical sector, industrial environmental monitoring systems can be deployed. By installing combustible and toxic gas detectors and alarms, real‑time monitoring of various gas concentrations and environmental parameters within chemical sites can be achieved.