Application of magnesium and biosurfactant functionalized biochar composite in treating cyanobacteria in phosphorus and crude oil contaminated water  

作　　者：Zhuo Wei Yaxi Xu Yi Wei Yang Liu Shuai Niu Jim J.Wang 

机构地区：[1]Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China [2]School of Plant,Environment and Soil Sciences,Louisiana State University AgCenter,Baton Rouge,LA 70803,USA

出　　处：《Biochar》2023年第1期862-876,共15页生物炭（英文）

基　　金：Yunnan Fundamental Research Projects(Grant#202201BE070001-043);National Natural Science Foundation of China(Grant#41967039);Yunnan Provincial Excellent Young Scientists Fund(Grant#202201AW070006);Yunnan Foundation Research Projects(202301AU070074)。

摘　　要：Various human activities have led to multiple contamination of natural water systems.The present study investigated the effect of a novel multifunctional biochar to treat nutrients,oil,and harmful algae in water.Specifically,magnesium(Mg)and biosurfactant rhamnolipid(RL)were incorporated into biochar,including Mg-biochar,RL-biochar,and Mg-RL-biochar.Their adsorption efficiency on phosphate and total petroleum hydrocarbons(TPH)was evaluated in separate batch studies.Also,the inhibition effect of RL-modified biochars on cyanobacteria was investigated.The results showed that Mg-impregnated biochar showed high adsorption capacity on phosphate(118 mg g^(−1)),while RLmodified biochar significantly reduced TPH(especially aromatic and light aliphatic fraction)with adsorption capacity of 44.4 mg g^(−1).The inhibition effects of biochar composites on algae in water without contaminants were in order of Mg-RL-biochar>RL-biochar>biochar with biomass reduction ranging 61-64%.Overall,Mg-RL-biochar was suggested based on this study due to its ability to remove PO_(4)^(3)−and TPH,and inhibit the growth of toxic algae.

关 键 词：Biochar modification Adsorption TPH Toxic algae EUTROPHICATION 

分 类 号：X52[环境科学与工程—环境工程]