According to Table 1, overall sampling site is unpolluted by Al and Ca; unpolluted to moderately polluted by Fe, K, Ti, Sr, and Ba; moderately polluted by Mn, Rb, Zn, and P; and strongly polluted by Sn and Zr.
Diatom keys developed by Taylor et al. (2007) were used to classify diatoms into four classes: A (clean water, i.e. no pollution), B (moderately polluted), C (strongly polluted) and D (electrolyte rich).
When comparing between the moderately polluted and the non-polluted areas, Erythrobacter showed a big difference.
The sediments from seriously polluted, moderately polluted, slightly polluted, and non-polluted sites exhibited different microbial communities and biotoxicities.
For the entire system the Igeo values calculated according to the Muller scale indicate that Cd was strongly to extremely polluted, As moderately to strongly polluted, Zn and Pb as unpolluted to moderately polluted, and Fe and Cu as unpolluted in the sediment (Table 7).
The results showed that a module using GAFI is from unpolluted to moderately polluted, while a module not using GAFI is moderately polluted to heavily polluted.
The vice minister, Wang Shiyuan, admitted that a further 8.2 million acres of arable land was moderately polluted.
According to the recently released data, the government classifies more than 3 million hectares of arable land as moderately polluted.
Arbuscular mycorrhizal fungi (AMF) can enhance metal tolerance in moderately polluted soils, but their ability to survive extreme levels of metal contamination has not been reported.
The paper is concluded with guidelines for appropriate design of NF-based systems for the treatment of moderately polluted surface water.
The following categorizations are given by Muller ([1969]) for geoaccumulation index: Igeo < 0 indicates unpolluted, Igeo = 0 to 1 unpolluted to <span class="lh">moderately polluted, Igeo = 1 to 2 moderately polluted, Igeo = 2 to 3 moderately to strongly polluted, Igeo = 3 to 4 strongly polluted, Igeo = 4 to 5 strongly to extremely polluted, and Igeo > 5 demonstrates extremely polluted.
