Effects of Lanthanum Modified Bentonite and Polyaluminium Chloride on the Environmental Variables in the Water and Sediment Phosphorus Form in Lake Yanglan, China

The application of lanthanum modified bentonite (Phoslock®) and polyaluminium chloride (PAC) is popular in the restoration European temperate lakes; however, effects on concentrations phosphorus (P) both water sediments have been poorly evaluated to date. We studied Phoslock® + PAC total (TP), particulate (PP), soluble reactive (SRP), suspended solids (TSS) chlorophyll a (Chla) water, different P forms sediments, an isolated part Lake Yanglan. results showed that TP, PP, SRP, TSS Chla decreased significantly after addition PAC. Moreover, labile-P, reductant-soluble-P organic-P were also application. However, stable apatite-P residual-P much higher than pre-addition values, while metal-oxide-P did not differ between pre- post- conditions. Our findings imply combined can be used subtropical shallow lakes, reduce suppress release from sediments.