1. Evaluation of the influence of El Niño-Southern Oscillation on air quality in southern China from long-term historical observations

   • Shansi Wang
   • Siwei Li
   • Shovan Kumar Sahu

   Research Article 11 June 2021 Article: 26

   

2. Achieving air pollutant emission reduction targets with minimum abatement costs: An enterprise-level allocation method with constraints of fairness and feasibility

   • Yanfei Chen
   • Ji Zheng
   • Cuicui Xiao

   Research Article 20 June 2021 Article: 25

   

3. Quantification of emission variability for off-road equipment in China based on real-world measurements

   • Kaili Pang
   • Kaishan Zhang
   • Xiangrui Meng

   Research Article 02 June 2021 Article: 24

   

4. Anaerobic digestion of sludge by different pretreatments: Changes of amino acids and microbial community

   • Keke Xiao
   • Zecong Yu
   • Jiakuan Yang

   Research Article 02 June 2021 Article: 23

   

5. Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

   • Rifeng Wu
   • Shanquan Wang

   Review Article Open access 08 June 2021 Article: 22

   

6. Effective and selective separation of perrhenate from acidic wastewater by super-stable, superhydrophobic, and recyclable biosorbent

   • Hui Hu
   • Lei Jiang
   • Chenguang Lv

   Research Article 05 June 2021 Article: 21

   

7. Mercury removal from flue gas using nitrate as an electron acceptor in a membrane biofilm reactor

   • Zaishan Wei
   • Meiru Tang
   • Huaiyong Jiao

   Research Article 30 May 2021 Article: 20

   

8. Biotoxicity evaluation of zinc oxide nanoparticles on bacterial performance of activated sludge at COD, nitrogen, and phosphorus reduction

   • Hasti Daraei
   • Kimia Toolabian
   • Guanglei Qiu

   Research Article 25 May 2021 Article: 19

   

9. Formation of secondary inorganic aerosol in a frigid urban atmosphere

   • Yuan Cheng
   • Qinqin Yu
   • Kebin He

   Research Article 30 May 2021 Article: 18

   

10. Microbial responses to the use of NaClO in sediment treatment

    • Kun Li
    • Tingming Ye
    • Huijuan Liu

    Research Article 20 May 2021 Article: 17

    

11. Influence of extracellular polymeric substances from activated sludge on the aggregation kinetics of silver and silver sulfide nanoparticles

    • Wanpeng Chen
    • Jiahui Song
    • Xiaoliu Huangfu

    Research Article 20 May 2021 Article: 16

    

12. Removal of steroid hormones from mariculture system using seaweed Caulerpa lentillifera

    • Jian Lu
    • Cui Zhang
    • Jun Wu

    Research Article 20 May 2021 Article: 15