Performance and kinetics of rotating drum biofilter aerobic simultaneous purifying SO and NO.

The rotating drum biofilter (RDB) was investigated as a biological process for purifying SO and NO. After 25 days of film hanging, the inlet concentration was less than 2800 mg·m, and the NO inlet concentration was less than 800 mg·m, with greater than 90% desulphurisation and denitration efficiency. and were the dominant bacteria in desulphurisation, while were the dominant bacteria in denitrification.

Pollution monitoring, risk assessment and target remediation of heavy metals in rice from a five-year investigation in Western Fujian region, China.

Recently, rice contamination by heavy metals (HMs) has become a severe problem. Taking the Western Fujian region as an example in this study, a total of 1311 rice samples containing eight HMs were collected from 2015 to 2019, then used to explore their pollution characteristics, health risks, and Spatio-temporal variations, finally derive the target remediation areas of the key pollutants. The results showed that average concentrations of all the HMs had not reached the limits of the National Standards of Food Safety, but pollution indexes of As (0.