Research On Stress Tolerance And Purification Efficiency Of Indoor Plants To Benzene Pollution

Benzene, the main chemical pollutant of indoor air pollution, has strong capability in carcinogenesis and malformation, has been known as one of the three invisible killers of indoor pollution, and is severely threatening human life and health. Seeking effective solutions to indoor benzene pollution control has become a concern in urban eco-environment construction and the problems to be solved. Indoor plants not only have the strong purificaion ability, but also have the function of absorbing carbon dioxide and releasing oxygen, especially with safe, stable, continuous purification effect, so the indoor plants ecological restoration technology has become the important means and basic way to treat indoor benzene pollution.This study was estimated by means of three replicates randomized block experimental design, using artificial fumigation on nine species of common indoor shade-tolerant foliage plants for different concentration of benzene pollution duress experiment. Through statistical analysis of variance analysis and multiple comparisons, resistance and purification capacity of the plants to indoor benzene pollution were studied, and plant configuration mode of ecological restoration indoor benzene pollution was built.The results show that:1. Resistance research on plants of indoor benzene pollution(1) The influence of different plant species, benzene concentration and interaction between two factors on variation of the contents of chlorophyll, the content of malonciialdephyde (MDA), the activity of peroxidase (POD) have come to an extremely significant level; the effects of benzene concentration on plant physiological indexes’ changes is more significant.(2) Under different benzene concentration condition, the influence of plant species on variation of the contents of chlorophyll, the content of MDA, the activity of POD all reached extremely significant level.(3) In benzene pollution duress, all the plants present a drop tendency to the contents of chlorophyll, all the plants present an increased tendency to the contents of MDA, and all the plants present an increased tendency to the activity of POD. The physiological indexes of Sansevieria trifasciata var. laurentii has minimal change, and its resistance to benzene pollution is the strongest.2. Research on plants purification ability of indoor benzene pollution(1) The influence of different plant species, benzene concentration and interaction between two factors on benzene purification rate and purification capacity of unit area has come to an extremely significant level. The effects of benzene concentration on purification rate is more significant, and the effects of plant species on benzene purification capacity of unit area is more significant.(2) Under different benzene concentration condition, the influence of plant species on variation of benzene purification rate and purification capacity of unit area both reached extremely significant level.(3) Along with benzene concentration elevating, all the plants present a drop tendency to the benzene purification rate, and all the plants present an increase tendency to the purification capacity of unit area. Under different benzene concentration condition, the benzene purification rate of Spathiphyllum floribundum is biggest, and the purification capacity of unit area of Sansevieria trifasciata var. laurentii is biggest.(4) Integrated indoor plant benzene purification rate and purification capacity of unit area under different benzene concentration condition, the plant of the best comprehensive purifying effect is Spathiphyllum floribundum.3. Sansevieria trifasciata var. laurentii has the strongest comprehensive resistance ability and absorption ability, namely the ability to resist the unclean suction, and it is the best choice for indoor benzene pollution plants.4. The principle of plant configuration to ecological restoration for benzene pollution is proposed, and three types of plant configuration mode to ecological restoration indoor benzene pollution are built:the ecological governance mode, the ecological maintenance mode and the ecological landscape mode.